Struts 2配置MySQL

1、首先下载JDBC驱动

2、在MySQL中创建数据库           存入适当数据做测试用

3、配置server.xml 

  将MySQL的JDBC驱动mysql-connector-java-bin.jar放到Tomcat\common\lib下面

用文本编辑器打开tomcat5\conf\server.xml，找到 </host> 结束标志，然后在之前加上如下语句：

Context   path= "/myapps "   docBase= "d:\myweb\myapps "   debug= "0 " 
reloadable= "true "   > 

    <Resource   name= "jdbc/DBConnection " 
                              auth= "Container " 
                              type= "javax.sql.DataSource "   /> 

    <ResourceParams   name= "jdbc/DBConnection "> 
        <parameter> 
            <name> factory </name> 
            <value> org.apache.commons.dbcp.BasicDataSourceFactory </value> 
        </parameter> 

        <!--   Maximum   number   of   dB   connections   in   pool.   Make   sure   you 
                  configure   your   mysqld   max_connections   large   enough   to   handle 
                  all   of   your   db   connections.   Set   to   0   for   no   limit. 
                  --> 
        <parameter> 
            <name> maxActive </name> 
            <value> 10 </value> 
        </parameter> 

        <!--   Maximum   number   of   idle   dB   connections   to   retain   in   pool. 
                  Set   to   0   for   no   limit. 
                  --> 
        <parameter> 
            <name> maxIdle </name> 
            <value> 3 </value> 
        </parameter> 

        <!--   Maximum   time   to   wait   for   a   dB   connection   to   become   available 
                  in   ms,   in   this   example   10   seconds.   An   Exception   is   thrown   if 
                  this   timeout   is   exceeded.     Set   to   -1   to   wait   indefinitely. 
                Maximum   time   to   wait   for   a   dB   connection   to   become   available 
                  in   ms,   in   this   example   10   seconds.   An   Exception   is   thrown   if 
                  this   timeout   is   exceeded.     Set   to   -1   to   wait   indefinitely. 
                  --> 
        <parameter> 
            <name> maxWait </name> 
            <value> 10000 </value> 
        </parameter> 

        <!--   MySQL   dB   username   and   password   for   dB   connections     --> 
        <parameter> 
          <name> username </name> 
          <value> root </value> 
        </parameter> 
        <parameter> 
          <name> password </name> 
          <value> 1234 </value> 
        </parameter> 

        <!--   Class   name   for   mm.mysql   JDBC   driver   --> 
        <parameter> 
              <name> driverClassName </name> 
              <value> com.mysql.jdbc.Driver </value> 
        </parameter> 

        <!--   The   JDBC   connection   url   for   connecting   to   your   MySQL   dB. 
                  The   autoReconnect=true   argument   to   the   url   makes   sure   that   the 
                  mm.mysql   JDBC   Driver   will   automatically   reconnect   if   mysqld   closed   the 
                  connection.     mysqld   by   default   closes   idle   connections   after   8   hours. 
                  --> 
        <parameter> 
            <name> url </name> 
            <value> jdbc:mysql://localhost:3306/forumdb?autoReconnect=true </value> 
        </parameter> 
    </ResourceParams> 

</Context> 

也可以是这个模式的：

 <Resource 
            name= "jdbc/****** " 
            type= "javax.sql.DataSource " 
            password= "123456 " 
            driverClassName= "com.microsoft.jdbc.sqlserver.SQLServerDriver " 
            maxIdle= "2 " 
            maxWait= "5000 " 
            username= "sa " 
            url= "jdbc:microsoft:sqlserver://localhost;DatabaseName=quickstart " 
            maxActive= "4 "/> 
再次提醒：一定要放在 </host> 之前！ 

4、配置web.xml 

web.xml位于myweb\myapps\WEB-INF下，也即是你的WEB里的web.xml。

同样用文本编辑器打开web.xml，然后加入如下语句（在 <web-app> 与 </web-app> 之间） 

  
<resource-ref> 
            <description> DB   Connection </description> 
            <res-ref-name> jdbc/DBConnection </res-ref-name> 
            <res-type> javax.sql.DataSource </res-type> 
            <res-auth> Container </res-auth> 
 </resource-ref> 

5、编写测试jsp   page

<%@   page   import= "java.io.*,java.util.*,java.sql.*,javax.sql.*,javax.naming.* "%> 
<%@   page   contentType= "text/html;charset=GB2312 "%> 
<html> 
<head> <title> DataSourse   Connection   Test </title> </head> 
<body> 
<% 
  try{ 
    java.sql.Connection   con; 
    Statement   stmt; 
    ResultSet   rs; 
    
    Context   ctx   =   new   InitialContext(); 
    DataSource   ds=(DataSource)ctx.lookup( "java:comp/env/jdbc/DBConnection "); 
    con=ds.getConnection(); 
    
    stmt=con.createStatement(); 
    rs=stmt.executeQuery( "select   *   from   member "); 
while(rs.next()){ 
    out.print(rs.getInt(1); 

  
out.print(rs.getString(2)); 
} 
    rs.close(); 
    stmt.close(); 
    con.close(); 
    
  }catch(Exception   e){ 
    out.print(e.getMessage()); 
  } 
    
%> 

</body> 
</html> 

开始测试 ……