Struts（12）MySQL数据库访问

Struts是一个MVC框架，而不是一个数据库框架，但它提供了极好的支持JPA/ Hibernate集成。我们将看看在的Hibernate集成在后面的章节，但在这一章中，我们将使用纯JDBC来访问数据库。

在这一章中的第一个步骤是设置我们的数据库。我作为我的数据库在这个例子中使用MySQL。在机器上安装MySQL，我创建了一个新的数据库称为“struts_tutorial”。创建了一个表称为 login，填充了一些值。下面是使用的脚本来创建和填充表。

MYSQL数据库默认的用户名“root”和密码为：“root123” 

<span class="pln" style="margin: 0px; padding: 0px;">CREATE TABLE </span><span class="str" style="margin: 0px; padding: 0px;">`struts_tutorial`</span><span class="pun" style="margin: 0px; padding: 0px;">.</span><span class="str" style="margin: 0px; padding: 0px;">`login`</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="pun" style="margin: 0px; padding: 0px;">(</span><span class="pln" style="margin: 0px; padding: 0px;">
   </span><span class="str" style="margin: 0px; padding: 0px;">`user`</span><span class="pln" style="margin: 0px; padding: 0px;"> VARCHAR</span><span class="pun" style="margin: 0px; padding: 0px;">(</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="lit" style="margin: 0px; padding: 0px;">10</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="pun" style="margin: 0px; padding: 0px;">)</span><span class="pln" style="margin: 0px; padding: 0px;"> NOT NULL </span><span class="pun" style="margin: 0px; padding: 0px;">,</span><span class="pln" style="margin: 0px; padding: 0px;">
   </span><span class="str" style="margin: 0px; padding: 0px;">`password`</span><span class="pln" style="margin: 0px; padding: 0px;"> VARCHAR</span><span class="pun" style="margin: 0px; padding: 0px;">(</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="lit" style="margin: 0px; padding: 0px;">10</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="pun" style="margin: 0px; padding: 0px;">)</span><span class="pln" style="margin: 0px; padding: 0px;"> NOT NULL </span><span class="pun" style="margin: 0px; padding: 0px;">,</span><span class="pln" style="margin: 0px; padding: 0px;">
   </span><span class="str" style="margin: 0px; padding: 0px;">`name`</span><span class="pln" style="margin: 0px; padding: 0px;"> VARCHAR</span><span class="pun" style="margin: 0px; padding: 0px;">(</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="lit" style="margin: 0px; padding: 0px;">20</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="pun" style="margin: 0px; padding: 0px;">)</span><span class="pln" style="margin: 0px; padding: 0px;"> NOT NULL </span><span class="pun" style="margin: 0px; padding: 0px;">,</span><span class="pln" style="margin: 0px; padding: 0px;">
   PRIMARY KEY </span><span class="pun" style="margin: 0px; padding: 0px;">(</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="str" style="margin: 0px; padding: 0px;">`user`</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="pun" style="margin: 0px; padding: 0px;">)</span><span class="pln" style="margin: 0px; padding: 0px;">
</span><span class="pun" style="margin: 0px; padding: 0px;">)</span><span class="pln" style="margin: 0px; padding: 0px;"> ENGINE </span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="typ" style="margin: 0px; padding: 0px;">InnoDB</span><span class="pun" style="margin: 0px; padding: 0px;">;</span><span class="pln" style="margin: 0px; padding: 0px;">

INSERT INTO </span><span class="str" style="margin: 0px; padding: 0px;">`struts_tutorial`</span><span class="pun" style="margin: 0px; padding: 0px;">.</span><span class="str" style="margin: 0px; padding: 0px;">`login`</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="pun" style="margin: 0px; padding: 0px;">(</span><span class="str" style="margin: 0px; padding: 0px;">`user`</span><span class="pun" style="margin: 0px; padding: 0px;">,</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="str" style="margin: 0px; padding: 0px;">`password`</span><span class="pun" style="margin: 0px; padding: 0px;">,</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="str" style="margin: 0px; padding: 0px;">`name`</span><span class="pun" style="margin: 0px; padding: 0px;">)</span><span class="pln" style="margin: 0px; padding: 0px;">
 VALUES </span><span class="pun" style="margin: 0px; padding: 0px;">(</span><span class="str" style="margin: 0px; padding: 0px;">'scott'</span><span class="pun" style="margin: 0px; padding: 0px;">,</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="str" style="margin: 0px; padding: 0px;">'navy'</span><span class="pun" style="margin: 0px; padding: 0px;">,</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="str" style="margin: 0px; padding: 0px;">'Scott Burgemott'</span><span class="pun" style="margin: 0px; padding: 0px;">);</span>

下一步是下载 MySQL Connector jar文件，并把这个文件的WEB-INF\ lib文件夹下。之后，已经做到了这一点，我们现在准备创建的动作类。 

创建动作：

动作类对应的数据库表中的列的属性。我们有字符串属性的用户名，密码和名称。在操作方法，我们使用用户和密码参数，以检查用户是否存在，如果存在，我们在下一个画面中显示的用户名。如果用户输入了错误的信息，我们把他们再次到登录屏幕。以下是LoginAction.java文件的内容：

<span class="kwd" style="margin: 0px; padding: 0px;">package</span><span class="pln" style="margin: 0px; padding: 0px;"> com</span><span class="pun" style="margin: 0px; padding: 0px;">.</span><span class="pln" style="margin: 0px; padding: 0px;">yiibai</span><span class="pun" style="margin: 0px; padding: 0px;">.</span><span class="pln" style="margin: 0px; padding: 0px;">struts2</span><span class="pun" style="margin: 0px; padding: 0px;">;</span><span class="pln" style="margin: 0px; padding: 0px;">

</span><span class="kwd" style="margin: 0px; padding: 0px;">import</span><span class="pln" style="margin: 0px; padding: 0px;"> java</span><span class="pun" style="margin: 0px; padding: 0px;">.</span><span class="pln" style="margin: 0px; padding: 0px;">sql</span><span class="pun" style="margin: 0px; padding: 0px;">.</span><span class="typ" style="margin: 0px; padding: 0px;">Connection</span><span class="pun" style="margin: 0px; padding: 0px;">;</span><span class="pln" style="margin: 0px; padding: 0px;">
</span><span class="kwd" style="margin: 0px; padding: 0px;">import</span><span class="pln" style="margin: 0px; padding: 0px;"> java</span><span class="pun" style="margin: 0px; padding: 0px;">.</span><span class="pln" style="margin: 0px; padding: 0px;">sql</span><span class="pun" style="margin: 0px; padding: 0px;">.</span><span class="typ" style="margin: 0px; padding: 0px;">DriverManager</span><span class="pun" style="margin: 0px; padding: 0px;">;</span><span class="pln" style="margin: 0px; padding: 0px;">
</span><span class="kwd" style="margin: 0px; padding: 0px;">import</span><span class="pln" style="margin: 0px; padding: 0px;"> java</span><span class="pun" style="margin: 0px; padding: 0px;">.</span><span class="pln" style="margin: 0px; padding: 0px;">sql</span><span class="pun" style="margin: 0px; padding: 0px;">.</span><span class="typ" style="margin: 0px; padding: 0px;">PreparedStatement</span><span class="pun" style="margin: 0px; padding: 0px;">;</span><span class="pln" style="margin: 0px; padding: 0px;">
</span><span class="kwd" style="margin: 0px; padding: 0px;">import</span><span class="pln" style="margin: 0px; padding: 0px;"> java</span><span class="pun" style="margin: 0px; padding: 0px;">.</span><span class="pln" style="margin: 0px; padding: 0px;">sql</span><span class="pun" style="margin: 0px; padding: 0px;">.</span><span class="typ" style="margin: 0px; padding: 0px;">ResultSet</span><span class="pun" style="margin: 0px; padding: 0px;">;</span><span class="pln" style="margin: 0px; padding: 0px;">

</span><span class="kwd" style="margin: 0px; padding: 0px;">import</span><span class="pln" style="margin: 0px; padding: 0px;"> com</span><span class="pun" style="margin: 0px; padding: 0px;">.</span><span class="pln" style="margin: 0px; padding: 0px;">opensymphony</span><span class="pun" style="margin: 0px; padding: 0px;">.</span><span class="pln" style="margin: 0px; padding: 0px;">xwork2</span><span class="pun" style="margin: 0px; padding: 0px;">.</span><span class="typ" style="margin: 0px; padding: 0px;">ActionSupport</span><span class="pun" style="margin: 0px; padding: 0px;">;</span><span class="pln" style="margin: 0px; padding: 0px;">

</span><span class="kwd" style="margin: 0px; padding: 0px;">public</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="kwd" style="margin: 0px; padding: 0px;">class</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="typ" style="margin: 0px; padding: 0px;">LoginAction</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="kwd" style="margin: 0px; padding: 0px;">extends</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="typ" style="margin: 0px; padding: 0px;">ActionSupport</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="pun" style="margin: 0px; padding: 0px;">{</span><span class="pln" style="margin: 0px; padding: 0px;">

   </span><span class="kwd" style="margin: 0px; padding: 0px;">private</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="typ" style="margin: 0px; padding: 0px;">String</span><span class="pln" style="margin: 0px; padding: 0px;"> user</span><span class="pun" style="margin: 0px; padding: 0px;">;</span><span class="pln" style="margin: 0px; padding: 0px;">
   </span><span class="kwd" style="margin: 0px; padding: 0px;">private</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="typ" style="margin: 0px; padding: 0px;">String</span><span class="pln" style="margin: 0px; padding: 0px;"> password</span><span class="pun" style="margin: 0px; padding: 0px;">;</span><span class="pln" style="margin: 0px; padding: 0px;">
   </span><span class="kwd" style="margin: 0px; padding: 0px;">private</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="typ" style="margin: 0px; padding: 0px;">String</span><span class="pln" style="margin: 0px; padding: 0px;"> name</span><span class="pun" style="margin: 0px; padding: 0px;">;</span><span class="pln" style="margin: 0px; padding: 0px;">

   </span><span class="kwd" style="margin: 0px; padding: 0px;">public</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="typ" style="margin: 0px; padding: 0px;">String</span><span class="pln" style="margin: 0px; padding: 0px;"> execute</span><span class="pun" style="margin: 0px; padding: 0px;">()</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="pun" style="margin: 0px; padding: 0px;">{</span><span class="pln" style="margin: 0px; padding: 0px;">
      </span><span class="typ" style="margin: 0px; padding: 0px;">String</span><span class="pln" style="margin: 0px; padding: 0px;"> ret </span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="pln" style="margin: 0px; padding: 0px;"> ERROR</span><span class="pun" style="margin: 0px; padding: 0px;">;</span><span class="pln" style="margin: 0px; padding: 0px;">
      </span><span class="typ" style="margin: 0px; padding: 0px;">Connection</span><span class="pln" style="margin: 0px; padding: 0px;"> conn </span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="kwd" style="margin: 0px; padding: 0px;">null</span><span class="pun" style="margin: 0px; padding: 0px;">;</span><span class="pln" style="margin: 0px; padding: 0px;">

      </span><span class="kwd" style="margin: 0px; padding: 0px;">try</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="pun" style="margin: 0px; padding: 0px;">{</span><span class="pln" style="margin: 0px; padding: 0px;">
         </span><span class="typ" style="margin: 0px; padding: 0px;">String</span><span class="pln" style="margin: 0px; padding: 0px;"> URL </span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="str" style="margin: 0px; padding: 0px;">"jdbc:mysql://localhost/struts_tutorial"</span><span class="pun" style="margin: 0px; padding: 0px;">;</span><span class="pln" style="margin: 0px; padding: 0px;">
         </span><span class="typ" style="margin: 0px; padding: 0px;">Class</span><span class="pun" style="margin: 0px; padding: 0px;">.</span><span class="pln" style="margin: 0px; padding: 0px;">forName</span><span class="pun" style="margin: 0px; padding: 0px;">(</span><span class="str" style="margin: 0px; padding: 0px;">"com.mysql.jdbc.Driver"</span><span class="pun" style="margin: 0px; padding: 0px;">);</span><span class="pln" style="margin: 0px; padding: 0px;">
         conn </span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="typ" style="margin: 0px; padding: 0px;">DriverManager</span><span class="pun" style="margin: 0px; padding: 0px;">.</span><span class="pln" style="margin: 0px; padding: 0px;">getConnection</span><span class="pun" style="margin: 0px; padding: 0px;">(</span><span class="pln" style="margin: 0px; padding: 0px;">URL</span><span class="pun" style="margin: 0px; padding: 0px;">,</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="str" style="margin: 0px; padding: 0px;">"root"</span><span class="pun" style="margin: 0px; padding: 0px;">,</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="str" style="margin: 0px; padding: 0px;">"root123"</span><span class="pun" style="margin: 0px; padding: 0px;">);</span><span class="pln" style="margin: 0px; padding: 0px;">
         </span><span class="typ" style="margin: 0px; padding: 0px;">String</span><span class="pln" style="margin: 0px; padding: 0px;"> sql </span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="str" style="margin: 0px; padding: 0px;">"SELECT name FROM login WHERE"</span><span class="pun" style="margin: 0px; padding: 0px;">;</span><span class="pln" style="margin: 0px; padding: 0px;">
         sql</span><span class="pun" style="margin: 0px; padding: 0px;">+=</span><span class="str" style="margin: 0px; padding: 0px;">" user = ? AND password = ?"</span><span class="pun" style="margin: 0px; padding: 0px;">;</span><span class="pln" style="margin: 0px; padding: 0px;">
         </span><span class="typ" style="margin: 0px; padding: 0px;">PreparedStatement</span><span class="pln" style="margin: 0px; padding: 0px;"> ps </span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="pln" style="margin: 0px; padding: 0px;"> conn</span><span class="pun" style="margin: 0px; padding: 0px;">.</span><span class="pln" style="margin: 0px; padding: 0px;">prepareStatement</span><span class="pun" style="margin: 0px; padding: 0px;">(</span><span class="pln" style="margin: 0px; padding: 0px;">sql</span><span class="pun" style="margin: 0px; padding: 0px;">);</span><span class="pln" style="margin: 0px; padding: 0px;">
         ps</span><span class="pun" style="margin: 0px; padding: 0px;">.</span><span class="pln" style="margin: 0px; padding: 0px;">setString</span><span class="pun" style="margin: 0px; padding: 0px;">(</span><span class="lit" style="margin: 0px; padding: 0px;">1</span><span class="pun" style="margin: 0px; padding: 0px;">,</span><span class="pln" style="margin: 0px; padding: 0px;"> user</span><span class="pun" style="margin: 0px; padding: 0px;">);</span><span class="pln" style="margin: 0px; padding: 0px;">
         ps</span><span class="pun" style="margin: 0px; padding: 0px;">.</span><span class="pln" style="margin: 0px; padding: 0px;">setString</span><span class="pun" style="margin: 0px; padding: 0px;">(</span><span class="lit" style="margin: 0px; padding: 0px;">2</span><span class="pun" style="margin: 0px; padding: 0px;">,</span><span class="pln" style="margin: 0px; padding: 0px;"> password</span><span class="pun" style="margin: 0px; padding: 0px;">);</span><span class="pln" style="margin: 0px; padding: 0px;">
         </span><span class="typ" style="margin: 0px; padding: 0px;">ResultSet</span><span class="pln" style="margin: 0px; padding: 0px;"> rs </span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="pln" style="margin: 0px; padding: 0px;"> ps</span><span class="pun" style="margin: 0px; padding: 0px;">.</span><span class="pln" style="margin: 0px; padding: 0px;">executeQuery</span><span class="pun" style="margin: 0px; padding: 0px;">();</span><span class="pln" style="margin: 0px; padding: 0px;">

         </span><span class="kwd" style="margin: 0px; padding: 0px;">while</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="pun" style="margin: 0px; padding: 0px;">(</span><span class="pln" style="margin: 0px; padding: 0px;">rs</span><span class="pun" style="margin: 0px; padding: 0px;">.</span><span class="kwd" style="margin: 0px; padding: 0px;">next</span><span class="pun" style="margin: 0px; padding: 0px;">())</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="pun" style="margin: 0px; padding: 0px;">{</span><span class="pln" style="margin: 0px; padding: 0px;">
            name </span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="pln" style="margin: 0px; padding: 0px;"> rs</span><span class="pun" style="margin: 0px; padding: 0px;">.</span><span class="pln" style="margin: 0px; padding: 0px;">getString</span><span class="pun" style="margin: 0px; padding: 0px;">(</span><span class="lit" style="margin: 0px; padding: 0px;">1</span><span class="pun" style="margin: 0px; padding: 0px;">);</span><span class="pln" style="margin: 0px; padding: 0px;">
            ret </span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="pln" style="margin: 0px; padding: 0px;"> SUCCESS</span><span class="pun" style="margin: 0px; padding: 0px;">;</span><span class="pln" style="margin: 0px; padding: 0px;">
         </span><span class="pun" style="margin: 0px; padding: 0px;">}</span><span class="pln" style="margin: 0px; padding: 0px;">
      </span><span class="pun" style="margin: 0px; padding: 0px;">}</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="kwd" style="margin: 0px; padding: 0px;">catch</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="pun" style="margin: 0px; padding: 0px;">(</span><span class="typ" style="margin: 0px; padding: 0px;">Exception</span><span class="pln" style="margin: 0px; padding: 0px;"> e</span><span class="pun" style="margin: 0px; padding: 0px;">)</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="pun" style="margin: 0px; padding: 0px;">{</span><span class="pln" style="margin: 0px; padding: 0px;">
         ret </span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="pln" style="margin: 0px; padding: 0px;"> ERROR</span><span class="pun" style="margin: 0px; padding: 0px;">;</span><span class="pln" style="margin: 0px; padding: 0px;">
      </span><span class="pun" style="margin: 0px; padding: 0px;">}</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="kwd" style="margin: 0px; padding: 0px;">finally</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="pun" style="margin: 0px; padding: 0px;">{</span><span class="pln" style="margin: 0px; padding: 0px;">
         </span><span class="kwd" style="margin: 0px; padding: 0px;">if</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="pun" style="margin: 0px; padding: 0px;">(</span><span class="pln" style="margin: 0px; padding: 0px;">conn </span><span class="pun" style="margin: 0px; padding: 0px;">!=</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="kwd" style="margin: 0px; padding: 0px;">null</span><span class="pun" style="margin: 0px; padding: 0px;">)</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="pun" style="margin: 0px; padding: 0px;">{</span><span class="pln" style="margin: 0px; padding: 0px;">
            </span><span class="kwd" style="margin: 0px; padding: 0px;">try</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="pun" style="margin: 0px; padding: 0px;">{</span><span class="pln" style="margin: 0px; padding: 0px;">
               conn</span><span class="pun" style="margin: 0px; padding: 0px;">.</span><span class="pln" style="margin: 0px; padding: 0px;">close</span><span class="pun" style="margin: 0px; padding: 0px;">();</span><span class="pln" style="margin: 0px; padding: 0px;">
            </span><span class="pun" style="margin: 0px; padding: 0px;">}</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="kwd" style="margin: 0px; padding: 0px;">catch</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="pun" style="margin: 0px; padding: 0px;">(</span><span class="typ" style="margin: 0px; padding: 0px;">Exception</span><span class="pln" style="margin: 0px; padding: 0px;"> e</span><span class="pun" style="margin: 0px; padding: 0px;">)</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="pun" style="margin: 0px; padding: 0px;">{</span><span class="pln" style="margin: 0px; padding: 0px;">
            </span><span class="pun" style="margin: 0px; padding: 0px;">}</span><span class="pln" style="margin: 0px; padding: 0px;">
         </span><span class="pun" style="margin: 0px; padding: 0px;">}</span><span class="pln" style="margin: 0px; padding: 0px;">
      </span><span class="pun" style="margin: 0px; padding: 0px;">}</span><span class="pln" style="margin: 0px; padding: 0px;">
      </span><span class="kwd" style="margin: 0px; padding: 0px;">return</span><span class="pln" style="margin: 0px; padding: 0px;"> ret</span><span class="pun" style="margin: 0px; padding: 0px;">;</span><span class="pln" style="margin: 0px; padding: 0px;">
   </span><span class="pun" style="margin: 0px; padding: 0px;">}</span><span class="pln" style="margin: 0px; padding: 0px;">

   </span><span class="kwd" style="margin: 0px; padding: 0px;">public</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="typ" style="margin: 0px; padding: 0px;">String</span><span class="pln" style="margin: 0px; padding: 0px;"> getUser</span><span class="pun" style="margin: 0px; padding: 0px;">()</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="pun" style="margin: 0px; padding: 0px;">{</span><span class="pln" style="margin: 0px; padding: 0px;">
      </span><span class="kwd" style="margin: 0px; padding: 0px;">return</span><span class="pln" style="margin: 0px; padding: 0px;"> user</span><span class="pun" style="margin: 0px; padding: 0px;">;</span><span class="pln" style="margin: 0px; padding: 0px;">
   </span><span class="pun" style="margin: 0px; padding: 0px;">}</span><span class="pln" style="margin: 0px; padding: 0px;">

   </span><span class="kwd" style="margin: 0px; padding: 0px;">public</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="kwd" style="margin: 0px; padding: 0px;">void</span><span class="pln" style="margin: 0px; padding: 0px;"> setUser</span><span class="pun" style="margin: 0px; padding: 0px;">(</span><span class="typ" style="margin: 0px; padding: 0px;">String</span><span class="pln" style="margin: 0px; padding: 0px;"> user</span><span class="pun" style="margin: 0px; padding: 0px;">)</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="pun" style="margin: 0px; padding: 0px;">{</span><span class="pln" style="margin: 0px; padding: 0px;">
      </span><span class="kwd" style="margin: 0px; padding: 0px;">this</span><span class="pun" style="margin: 0px; padding: 0px;">.</span><span class="pln" style="margin: 0px; padding: 0px;">user </span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="pln" style="margin: 0px; padding: 0px;"> user</span><span class="pun" style="margin: 0px; padding: 0px;">;</span><span class="pln" style="margin: 0px; padding: 0px;">
   </span><span class="pun" style="margin: 0px; padding: 0px;">}</span><span class="pln" style="margin: 0px; padding: 0px;">

   </span><span class="kwd" style="margin: 0px; padding: 0px;">public</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="typ" style="margin: 0px; padding: 0px;">String</span><span class="pln" style="margin: 0px; padding: 0px;"> getPassword</span><span class="pun" style="margin: 0px; padding: 0px;">()</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="pun" style="margin: 0px; padding: 0px;">{</span><span class="pln" style="margin: 0px; padding: 0px;">
      </span><span class="kwd" style="margin: 0px; padding: 0px;">return</span><span class="pln" style="margin: 0px; padding: 0px;"> password</span><span class="pun" style="margin: 0px; padding: 0px;">;</span><span class="pln" style="margin: 0px; padding: 0px;">
   </span><span class="pun" style="margin: 0px; padding: 0px;">}</span><span class="pln" style="margin: 0px; padding: 0px;">

   </span><span class="kwd" style="margin: 0px; padding: 0px;">public</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="kwd" style="margin: 0px; padding: 0px;">void</span><span class="pln" style="margin: 0px; padding: 0px;"> setPassword</span><span class="pun" style="margin: 0px; padding: 0px;">(</span><span class="typ" style="margin: 0px; padding: 0px;">String</span><span class="pln" style="margin: 0px; padding: 0px;"> password</span><span class="pun" style="margin: 0px; padding: 0px;">)</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="pun" style="margin: 0px; padding: 0px;">{</span><span class="pln" style="margin: 0px; padding: 0px;">
      </span><span class="kwd" style="margin: 0px; padding: 0px;">this</span><span class="pun" style="margin: 0px; padding: 0px;">.</span><span class="pln" style="margin: 0px; padding: 0px;">password </span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="pln" style="margin: 0px; padding: 0px;"> password</span><span class="pun" style="margin: 0px; padding: 0px;">;</span><span class="pln" style="margin: 0px; padding: 0px;">
   </span><span class="pun" style="margin: 0px; padding: 0px;">}</span><span class="pln" style="margin: 0px; padding: 0px;">

   </span><span class="kwd" style="margin: 0px; padding: 0px;">public</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="typ" style="margin: 0px; padding: 0px;">String</span><span class="pln" style="margin: 0px; padding: 0px;"> getName</span><span class="pun" style="margin: 0px; padding: 0px;">()</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="pun" style="margin: 0px; padding: 0px;">{</span><span class="pln" style="margin: 0px; padding: 0px;">
      </span><span class="kwd" style="margin: 0px; padding: 0px;">return</span><span class="pln" style="margin: 0px; padding: 0px;"> name</span><span class="pun" style="margin: 0px; padding: 0px;">;</span><span class="pln" style="margin: 0px; padding: 0px;">
   </span><span class="pun" style="margin: 0px; padding: 0px;">}</span><span class="pln" style="margin: 0px; padding: 0px;">

   </span><span class="kwd" style="margin: 0px; padding: 0px;">public</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="kwd" style="margin: 0px; padding: 0px;">void</span><span class="pln" style="margin: 0px; padding: 0px;"> setName</span><span class="pun" style="margin: 0px; padding: 0px;">(</span><span class="typ" style="margin: 0px; padding: 0px;">String</span><span class="pln" style="margin: 0px; padding: 0px;"> name</span><span class="pun" style="margin: 0px; padding: 0px;">)</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="pun" style="margin: 0px; padding: 0px;">{</span><span class="pln" style="margin: 0px; padding: 0px;">
      </span><span class="kwd" style="margin: 0px; padding: 0px;">this</span><span class="pun" style="margin: 0px; padding: 0px;">.</span><span class="pln" style="margin: 0px; padding: 0px;">name </span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="pln" style="margin: 0px; padding: 0px;"> name</span><span class="pun" style="margin: 0px; padding: 0px;">;</span><span class="pln" style="margin: 0px; padding: 0px;">
   </span><span class="pun" style="margin: 0px; padding: 0px;">}</span><span class="pln" style="margin: 0px; padding: 0px;">
</span><span class="pun" style="margin: 0px; padding: 0px;">}</span>

创建页面：

现在，让我们创建一个JSP文件index.jsp的收集用户名和密码。此用户名和密码对数据库进行检查。

<span class="pun" style="margin: 0px; padding: 0px;"><%@</span><span class="pln" style="margin: 0px; padding: 0px;"> page language</span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="str" style="margin: 0px; padding: 0px;">"java"</span><span class="pln" style="margin: 0px; padding: 0px;"> contentType</span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="str" style="margin: 0px; padding: 0px;">"text/html; charset=ISO-8859-1"</span><span class="pln" style="margin: 0px; padding: 0px;">
pageEncoding</span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="str" style="margin: 0px; padding: 0px;">"ISO-8859-1"</span><span class="pln" style="margin: 0px; padding: 0px;">%>
</span><span class="pun" style="margin: 0px; padding: 0px;"><%@</span><span class="pln" style="margin: 0px; padding: 0px;"> taglib prefix</span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="str" style="margin: 0px; padding: 0px;">"s"</span><span class="pln" style="margin: 0px; padding: 0px;"> uri</span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="str" style="margin: 0px; padding: 0px;">"/struts-tags"</span><span class="pln" style="margin: 0px; padding: 0px;">%>
</span><span class="dec" style="margin: 0px; padding: 0px;"><!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" 
"http://www.w3.org/TR/html4/loose.dtd"></span><span class="pln" style="margin: 0px; padding: 0px;">
</span><span class="tag" style="margin: 0px; padding: 0px;"><html></span><span class="pln" style="margin: 0px; padding: 0px;">
</span><span class="tag" style="margin: 0px; padding: 0px;"><head></span><span class="pln" style="margin: 0px; padding: 0px;">
</span><span class="tag" style="margin: 0px; padding: 0px;"><title></span><span class="pln" style="margin: 0px; padding: 0px;">Login</span><span class="tag" style="margin: 0px; padding: 0px;"></title></span><span class="pln" style="margin: 0px; padding: 0px;">
</span><span class="tag" style="margin: 0px; padding: 0px;"></head></span><span class="pln" style="margin: 0px; padding: 0px;">
</span><span class="tag" style="margin: 0px; padding: 0px;"><body></span><span class="pln" style="margin: 0px; padding: 0px;">
   </span><span class="tag" style="margin: 0px; padding: 0px;"><form</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="atn" style="margin: 0px; padding: 0px;">action</span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="atv" style="margin: 0px; padding: 0px;">"loginaction"</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="atn" style="margin: 0px; padding: 0px;">method</span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="atv" style="margin: 0px; padding: 0px;">"post"</span><span class="tag" style="margin: 0px; padding: 0px;">></span><span class="pln" style="margin: 0px; padding: 0px;">
      User:</span><span class="tag" style="margin: 0px; padding: 0px;"><br/><input</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="atn" style="margin: 0px; padding: 0px;">type</span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="atv" style="margin: 0px; padding: 0px;">"text"</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="atn" style="margin: 0px; padding: 0px;">name</span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="atv" style="margin: 0px; padding: 0px;">"user"</span><span class="tag" style="margin: 0px; padding: 0px;">/><br/></span><span class="pln" style="margin: 0px; padding: 0px;">
      Password:</span><span class="tag" style="margin: 0px; padding: 0px;"><br/><input</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="atn" style="margin: 0px; padding: 0px;">type</span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="atv" style="margin: 0px; padding: 0px;">"password"</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="atn" style="margin: 0px; padding: 0px;">name</span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="atv" style="margin: 0px; padding: 0px;">"password"</span><span class="tag" style="margin: 0px; padding: 0px;">/><br/></span><span class="pln" style="margin: 0px; padding: 0px;">
      </span><span class="tag" style="margin: 0px; padding: 0px;"><input</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="atn" style="margin: 0px; padding: 0px;">type</span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="atv" style="margin: 0px; padding: 0px;">"submit"</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="atn" style="margin: 0px; padding: 0px;">value</span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="atv" style="margin: 0px; padding: 0px;">"Login"</span><span class="tag" style="margin: 0px; padding: 0px;">/></span><span class="pln" style="margin: 0px; padding: 0px;">		
   </span><span class="tag" style="margin: 0px; padding: 0px;"></form></span><span class="pln" style="margin: 0px; padding: 0px;">
</span><span class="tag" style="margin: 0px; padding: 0px;"></body></span><span class="pln" style="margin: 0px; padding: 0px;">
</span><span class="tag" style="margin: 0px; padding: 0px;"></html></span>

创建视图：

现在，让我们一起创造的success.jsp文件将被调用的情况下动作返回SUCCESS，但在发生错误ERROR 的情况下，我们将有另一种观点认为文件是从操作返回。

<span class="pun" style="margin: 0px; padding: 0px;"><%@</span><span class="pln" style="margin: 0px; padding: 0px;"> page contentType</span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="str" style="margin: 0px; padding: 0px;">"text/html; charset=UTF-8"</span><span class="pln" style="margin: 0px; padding: 0px;"> %>
</span><span class="pun" style="margin: 0px; padding: 0px;"><%@</span><span class="pln" style="margin: 0px; padding: 0px;"> taglib prefix</span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="str" style="margin: 0px; padding: 0px;">"s"</span><span class="pln" style="margin: 0px; padding: 0px;"> uri</span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="str" style="margin: 0px; padding: 0px;">"/struts-tags"</span><span class="pln" style="margin: 0px; padding: 0px;"> %>
</span><span class="tag" style="margin: 0px; padding: 0px;"><html></span><span class="pln" style="margin: 0px; padding: 0px;">
</span><span class="tag" style="margin: 0px; padding: 0px;"><head></span><span class="pln" style="margin: 0px; padding: 0px;">
</span><span class="tag" style="margin: 0px; padding: 0px;"><title></span><span class="pln" style="margin: 0px; padding: 0px;">Successful Login</span><span class="tag" style="margin: 0px; padding: 0px;"></title></span><span class="pln" style="margin: 0px; padding: 0px;">
</span><span class="tag" style="margin: 0px; padding: 0px;"></head></span><span class="pln" style="margin: 0px; padding: 0px;">
</span><span class="tag" style="margin: 0px; padding: 0px;"><body></span><span class="pln" style="margin: 0px; padding: 0px;">
   Hello World, </span><span class="tag" style="margin: 0px; padding: 0px;"><s:property</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="atn" style="margin: 0px; padding: 0px;">value</span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="atv" style="margin: 0px; padding: 0px;">"name"</span><span class="tag" style="margin: 0px; padding: 0px;">/></span><span class="pln" style="margin: 0px; padding: 0px;">
</span><span class="tag" style="margin: 0px; padding: 0px;"></body></span><span class="pln" style="margin: 0px; padding: 0px;">
</span><span class="tag" style="margin: 0px; padding: 0px;"></html></span>

下面将是在一个错误的情况下，从动作返回视图文件error.jsp。

<span class="pun" style="margin: 0px; padding: 0px;"><%@</span><span class="pln" style="margin: 0px; padding: 0px;"> page contentType</span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="str" style="margin: 0px; padding: 0px;">"text/html; charset=UTF-8"</span><span class="pln" style="margin: 0px; padding: 0px;"> %>
</span><span class="pun" style="margin: 0px; padding: 0px;"><%@</span><span class="pln" style="margin: 0px; padding: 0px;"> taglib prefix</span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="str" style="margin: 0px; padding: 0px;">"s"</span><span class="pln" style="margin: 0px; padding: 0px;"> uri</span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="str" style="margin: 0px; padding: 0px;">"/struts-tags"</span><span class="pln" style="margin: 0px; padding: 0px;"> %>
</span><span class="tag" style="margin: 0px; padding: 0px;"><html></span><span class="pln" style="margin: 0px; padding: 0px;">
</span><span class="tag" style="margin: 0px; padding: 0px;"><head></span><span class="pln" style="margin: 0px; padding: 0px;">
</span><span class="tag" style="margin: 0px; padding: 0px;"><title></span><span class="pln" style="margin: 0px; padding: 0px;">Invalid User Name or Password</span><span class="tag" style="margin: 0px; padding: 0px;"></title></span><span class="pln" style="margin: 0px; padding: 0px;">
</span><span class="tag" style="margin: 0px; padding: 0px;"></head></span><span class="pln" style="margin: 0px; padding: 0px;">
</span><span class="tag" style="margin: 0px; padding: 0px;"><body></span><span class="pln" style="margin: 0px; padding: 0px;">
   Wrong user name or password provided.
</span><span class="tag" style="margin: 0px; padding: 0px;"></body></span><span class="pln" style="margin: 0px; padding: 0px;">
</span><span class="tag" style="margin: 0px; padding: 0px;"></html></span>

配置文件：

最后，让我们一起使用struts.xml 配置文件如下：

<span class="pun" style="margin: 0px; padding: 0px;"><?</span><span class="pln" style="margin: 0px; padding: 0px;">xml version</span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="str" style="margin: 0px; padding: 0px;">"1.0"</span><span class="pln" style="margin: 0px; padding: 0px;"> encoding</span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="str" style="margin: 0px; padding: 0px;">"UTF-8"</span><span class="pun" style="margin: 0px; padding: 0px;">?></span><span class="pln" style="margin: 0px; padding: 0px;">
</span><span class="dec" style="margin: 0px; padding: 0px;"><!DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
"http://struts.apache.org/dtds/struts-2.0.dtd"></span><span class="pln" style="margin: 0px; padding: 0px;">

</span><span class="tag" style="margin: 0px; padding: 0px;"><struts></span><span class="pln" style="margin: 0px; padding: 0px;">
   </span><span class="tag" style="margin: 0px; padding: 0px;"><constant</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="atn" style="margin: 0px; padding: 0px;">name</span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="atv" style="margin: 0px; padding: 0px;">"struts.devMode"</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="atn" style="margin: 0px; padding: 0px;">value</span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="atv" style="margin: 0px; padding: 0px;">"true"</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="tag" style="margin: 0px; padding: 0px;">/></span><span class="pln" style="margin: 0px; padding: 0px;">
   </span><span class="tag" style="margin: 0px; padding: 0px;"><package</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="atn" style="margin: 0px; padding: 0px;">name</span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="atv" style="margin: 0px; padding: 0px;">"helloworld"</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="atn" style="margin: 0px; padding: 0px;">extends</span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="atv" style="margin: 0px; padding: 0px;">"struts-default"</span><span class="tag" style="margin: 0px; padding: 0px;">></span><span class="pln" style="margin: 0px; padding: 0px;">
   
      </span><span class="tag" style="margin: 0px; padding: 0px;"><action</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="atn" style="margin: 0px; padding: 0px;">name</span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="atv" style="margin: 0px; padding: 0px;">"loginaction"</span><span class="pln" style="margin: 0px; padding: 0px;"> 
         </span><span class="atn" style="margin: 0px; padding: 0px;">class</span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="atv" style="margin: 0px; padding: 0px;">"com.yiibai.struts2.LoginAction"</span><span class="pln" style="margin: 0px; padding: 0px;">
         </span><span class="atn" style="margin: 0px; padding: 0px;">method</span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="atv" style="margin: 0px; padding: 0px;">"execute"</span><span class="tag" style="margin: 0px; padding: 0px;">></span><span class="pln" style="margin: 0px; padding: 0px;">
         </span><span class="tag" style="margin: 0px; padding: 0px;"><result</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="atn" style="margin: 0px; padding: 0px;">name</span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="atv" style="margin: 0px; padding: 0px;">"success"</span><span class="tag" style="margin: 0px; padding: 0px;">></span><span class="pln" style="margin: 0px; padding: 0px;">/success.jsp</span><span class="tag" style="margin: 0px; padding: 0px;"></result></span><span class="pln" style="margin: 0px; padding: 0px;">
         </span><span class="tag" style="margin: 0px; padding: 0px;"><result</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="atn" style="margin: 0px; padding: 0px;">name</span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="atv" style="margin: 0px; padding: 0px;">"error"</span><span class="tag" style="margin: 0px; padding: 0px;">></span><span class="pln" style="margin: 0px; padding: 0px;">/error.jsp</span><span class="tag" style="margin: 0px; padding: 0px;"></result></span><span class="pln" style="margin: 0px; padding: 0px;">
      </span><span class="tag" style="margin: 0px; padding: 0px;"></action></span><span class="pln" style="margin: 0px; padding: 0px;">
   
   </span><span class="tag" style="margin: 0px; padding: 0px;"></package></span><span class="pln" style="margin: 0px; padding: 0px;">

</span><span class="tag" style="margin: 0px; padding: 0px;"></struts></span>

以下是web.xml文件中的内容：

<span class="pun" style="margin: 0px; padding: 0px;"><?</span><span class="pln" style="margin: 0px; padding: 0px;">xml version</span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="str" style="margin: 0px; padding: 0px;">"1.0"</span><span class="pln" style="margin: 0px; padding: 0px;"> encoding</span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="str" style="margin: 0px; padding: 0px;">"UTF-8"</span><span class="pun" style="margin: 0px; padding: 0px;">?></span><span class="pln" style="margin: 0px; padding: 0px;">
</span><span class="tag" style="margin: 0px; padding: 0px;"><web-app</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="atn" style="margin: 0px; padding: 0px;">xmlns:xsi</span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="atv" style="margin: 0px; padding: 0px;">"http://www.w3.org/2001/XMLSchema-instance"</span><span class="pln" style="margin: 0px; padding: 0px;">
   </span><span class="atn" style="margin: 0px; padding: 0px;">xmlns</span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="atv" style="margin: 0px; padding: 0px;">"http://java.sun.com/xml/ns/javaee"</span><span class="pln" style="margin: 0px; padding: 0px;"> 
   </span><span class="atn" style="margin: 0px; padding: 0px;">xmlns:web</span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="atv" style="margin: 0px; padding: 0px;">"http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"</span><span class="pln" style="margin: 0px; padding: 0px;">
   </span><span class="atn" style="margin: 0px; padding: 0px;">xsi:schemaLocation</span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="atv" style="margin: 0px; padding: 0px;">"http://java.sun.com/xml/ns/javaee 
   http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"</span><span class="pln" style="margin: 0px; padding: 0px;">
   </span><span class="atn" style="margin: 0px; padding: 0px;">id</span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="atv" style="margin: 0px; padding: 0px;">"WebApp_ID"</span><span class="pln" style="margin: 0px; padding: 0px;"> </span><span class="atn" style="margin: 0px; padding: 0px;">version</span><span class="pun" style="margin: 0px; padding: 0px;">=</span><span class="atv" style="margin: 0px; padding: 0px;">"3.0"</span><span class="tag" style="margin: 0px; padding: 0px;">></span><span class="pln" style="margin: 0px; padding: 0px;">
   
   </span><span class="tag" style="margin: 0px; padding: 0px;"><display-name></span><span class="pln" style="margin: 0px; padding: 0px;">Struts 2</span><span class="tag" style="margin: 0px; padding: 0px;"></display-name></span><span class="pln" style="margin: 0px; padding: 0px;">
   </span><span class="tag" style="margin: 0px; padding: 0px;"><welcome-file-list></span><span class="pln" style="margin: 0px; padding: 0px;">
      </span><span class="tag" style="margin: 0px; padding: 0px;"><welcome-file></span><span class="pln" style="margin: 0px; padding: 0px;">index.jsp</span><span class="tag" style="margin: 0px; padding: 0px;"></welcome-file></span><span class="pln" style="margin: 0px; padding: 0px;">
   </span><span class="tag" style="margin: 0px; padding: 0px;"></welcome-file-list></span><span class="pln" style="margin: 0px; padding: 0px;">
   </span><span class="tag" style="margin: 0px; padding: 0px;"><filter></span><span class="pln" style="margin: 0px; padding: 0px;">
      </span><span class="tag" style="margin: 0px; padding: 0px;"><filter-name></span><span class="pln" style="margin: 0px; padding: 0px;">struts2</span><span class="tag" style="margin: 0px; padding: 0px;"></filter-name></span><span class="pln" style="margin: 0px; padding: 0px;">
      </span><span class="tag" style="margin: 0px; padding: 0px;"><filter-class></span><span class="pln" style="margin: 0px; padding: 0px;">
         org.apache.struts2.dispatcher.FilterDispatcher
      </span><span class="tag" style="margin: 0px; padding: 0px;"></filter-class></span><span class="pln" style="margin: 0px; padding: 0px;">
   </span><span class="tag" style="margin: 0px; padding: 0px;"></filter></span><span class="pln" style="margin: 0px; padding: 0px;">

   </span><span class="tag" style="margin: 0px; padding: 0px;"><filter-mapping></span><span class="pln" style="margin: 0px; padding: 0px;">
      </span><span class="tag" style="margin: 0px; padding: 0px;"><filter-name></span><span class="pln" style="margin: 0px; padding: 0px;">struts2</span><span class="tag" style="margin: 0px; padding: 0px;"></filter-name></span><span class="pln" style="margin: 0px; padding: 0px;">
      </span><span class="tag" style="margin: 0px; padding: 0px;"><url-pattern></span><span class="pln" style="margin: 0px; padding: 0px;">/*</span><span class="tag" style="margin: 0px; padding: 0px;"></url-pattern></span><span class="pln" style="margin: 0px; padding: 0px;">
   </span><span class="tag" style="margin: 0px; padding: 0px;"></filter-mapping></span><span class="pln" style="margin: 0px; padding: 0px;">
</span><span class="tag" style="margin: 0px; padding: 0px;"></web-app></span>

现在，右键点击项目名称，并单击Export > WAR File创建一个WAR文件。然后部署此WAR在Tomcat 的 webapps目录下。最后，启动Tomcat服务器和尝试访问URL http://localhost:8080/HelloWorldStruts2/index.jsp。这会给以下画面：

输入了错误的用户名和密码。应该看到页面如下：

现在进入scott 用户名和密码为 navy 。应该看到页面如下：