springMVC注解前台像后台传值的两种方式

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1 web.xml 配置

    <?xml version="1.0" encoding="UTF-8"?>      <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" id="WebApp_ID" version="3.1">      <servlet>              <servlet-name>springMVC</servlet-name>              <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>              <load-on-startup>1</load-on-startup>          </servlet>          <servlet-mapping>              <servlet-name>springMVC</servlet-name>              <url-pattern>*.spring</url-pattern>          </servlet-mapping>          <welcome-file-list>              <welcome-file>index.jsp</welcome-file>          </welcome-file-list>      </web-app>

2 springMVC-servlet.xml

    <?xml version="1.0" encoding="UTF-8"?>      <beans xmlns="http://www.springframework.org/schema/beans"          xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p"          xmlns:context="http://www.springframework.org/schema/context"          xsi:schemaLocation="              http://www.springframework.org/schema/beans               http://www.springframework.org/schema/beans/spring-beans-3.0.xsd              http://www.springframework.org/schema/context               http://www.springframework.org/schema/context/spring-context-3.0.xsd">          <context:component-scan base-package="com.gaowei.controller" />      </beans>

3 前台界面代码。
3.1 login.jsp

    <%@ page language="java" contentType="text/html; charset=UTF-8"          pageEncoding="UTF-8"%>      <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">      <html>      <head>      <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">      <title>Insert title here</title>      </head>      <body>      <form action="login.spring" method="post">          username:<input type="text" name="username">          <br/>          password:<input type="text" name="password">          <br/>          <input type="submit" value="登录">      </form>      </body>      </html>

3.2 no.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"      pageEncoding="UTF-8"%>  <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">  <html>  <head>  <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">  <title>Insert title here</title>  </head>  <body>  No!  </body>  </html>

3.3 yes.jsp
……
4 Contorller层接收前台的两种方式。
4.1 方式一：利用@RequestParam这个注解

package com.gaowei.controller;  import org.springframework.stereotype.Controller;  import org.springframework.ui.Model;  import org.springframework.web.bind.annotation.RequestMapping;  import org.springframework.web.bind.annotation.RequestParam;  @Controller  public class Login {      //方式一      @RequestMapping("/login")      public String login(@RequestParam("username") String username,                          @RequestParam("password") String password,Model model){          if (username.equals(password))           {              model.addAttribute("username", username);              return "ok.jsp";          } else {              return "no.jsp";          }      }

4.2 方式二：

    package com.gaowei.controller;      import org.springframework.stereotype.Controller;      import org.springframework.ui.Model;      import org.springframework.web.bind.annotation.RequestMapping;      import org.springframework.web.bind.annotation.RequestParam;      @Controller      public class Login {      @RequestMapping("/login")          public String login(String username,String password,Model model){              if (username.equals(password))               {                  model.addAttribute("username", username);                  return "ok.jsp";              } else {                  return "no.jsp";              }          }      }

原文链接：http://blog.csdn.net/gwblue/article/details/42966017

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