一.框架图
二.步骤
1./WebRoot/WEB-INF/lib下添加SpringMVC必须的jar包;
下载地址:http://download.youkuaiyun.com/detail/decorator2015/9724399
2.在com.xml.models包中创建User类,该类包含两个属性:username和password,并分别实现这两个属性的setXxx()和getXxx()方法。
package com.xml.models;
public class User {
private String username;
private String password;
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
}
3.创建命令控制器类UserCommandController,该控制器要处理输入的username和password属性。在handle( )方法中command就是输入的一个对象,这里需要先转化为User类,并调用相应的方法获取User类中的username和password 属性值。然后放到一个List集合中,再调用getPage( )方法传回到指定的视图中。这个视图名在spring-servlet.xml文件中指定,该程序中指定为user。具体的代码如下:
package com.xml.models;
import java.util.ArrayList;
import java.util.List;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.springframework.validation.BindException;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.mvc.AbstractCommandController;
public class UserCommandController extends AbstractCommandController {
private String page;
public UserCommandController(){
//设置命令对象类型
setCommandClass(User.class);
}
@Override
protected ModelAndView handle(HttpServletRequest request,
HttpServletResponse response, Object command, BindException errors)
throws Exception {
// TODO Auto-generated method stub
User user=(User)command; //获取用户对象
String username=user.getUsername(); //获取用户名
String password=user.getPassword(); //获取密码
List list=new ArrayList();
list.add(0,username);
list.add(1,password);
return new ModelAndView(getPage(),"info",list);
}
public String getPage() {
return page;
}
public void setPage(String page) {
this.page = page;
}
}
4.在WEB-INF/web.xml配置文件中配置DispatcherServlet,该应用将加载WEB-INF/spring-servlet.xml配置文件。具体的代码如下:
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5"
xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
<display-name>SpringMVCProject</display-name>
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
<!--配置DispatcherServlet -->
<servlet>
<servlet-name>spring</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>spring</servlet-name>
<url-pattern>*.do</url-pattern>
</servlet-mapping>
<!-- 配置分解应用上下文 -->
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<!-- context -->
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>
/WEB-INF/spring-servlet.xml
</param-value>
</context-param>
</web-app>
5.在WEB-INF/spring-servlet.xml配置文件,在该文件中配置控制器。向控制器UserCommandController注入了一个名称为page的属性,并配置该属性值为user。其具体的代码如下:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE beans PUBLIC
"-//SPRING//dtd BEAN//EN"
"http://www.springframework.org/dtd/spring-beans.dtd">
<beans>
<bean name="/user.do" class="com.xml.models.UserCommandController"><!-- 配置控制器 -->
<property name="page" value="user"/>
</bean>
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/"/>
<property name="suffix" value=".jsp"/>
</bean>
</beans>
6.在WebRoot目录下新建index.jsp文件,该文件的主要内容如下:
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">
<title>My JSP 'index.jsp' starting page</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
</head>
<body>
<form action="user.do" method="post">
用户名:<input type="text" value="admin" name="username" />
密码:<input type="password" value="123" name="password"/>
<input type="submit" value="登录">
</form>
</body>
</html>
7.在WebRoot目录下新建user.jsp文件,在该文件中输入用户的用户名和密码,主要代码如下:
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">
<title>My JSP 'user.jsp' starting page</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
</head>
<body>
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td width="60px" style="font-size:14px; font-weight:bold;">用户名</td>
<td>${info[0]}</td>
</tr>
<tr>
<td style="font-size:14px; font-weight:bold;">密码</td>
<td>${info[1]}</td>
</tr>
</table>
</body>
</html>
8.运行程序,请求index.jsp,输入用户名和密码,如下图(登录界面)
单击【登录】按钮,输出用户登录信息,如下图(输出用户登录信息)