spring3 mvc：方法返回值的学习

新建后台代码用以测试返回类型，在这里我新建的如下：

/**
 * 项目名称：Spring3mvc demo
 * Copyright ? 2010-2012 spartacus.org.cn All Rights Reserved
 */
package cn.org.spartacus.spring;   

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.servlet.ModelAndView;  

/**
 * Description: TODO
 * @author hankaibo
 * @date 2012-11-4
 * @version v1.0
 */
 @Controller
 //添加注解，这样配置文件就可以找到它了。
 public class ReturnController {
 }

　　1，测试ModelAndView类型的返回。在代码中添加如下方法：

/**
 * 项目名称：Spring3mvc demo
 * Copyright ? 2010-2012 spartacus.org.cn All Rights Reserved
 */
package cn.org.spartacus.spring;    

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;  

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.servlet.ModelAndView;  

/**
 * Description: TODO
 * @author hankaibo
 * @date 2012-11-4
 * @version v1.0
 */
@Controller     //添加注解，这样配置文件就可以找到它了。
@RequestMapping("return")
public class ReturnController {
    /**
     * <p>Description: 测试一，返回ModelAndVie类型</p>
     * @param
     * @return ModelAndView
     */
    @RequestMapping(value="test1",method=RequestMethod.GET)
    public ModelAndView test1(HttpServletRequest request,HttpServletResponse response){
        ModelAndView mav=new ModelAndView();
        mav.setViewName("mav");     //设置返回的文件名
        mav.addObject("mav", "我的返回类型是ModelAndView.");
        return mav;  

    }  

}

　　新建用于接受结果的前台页面mav.jsp：

<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
<%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
<!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>mav</title>
</head>
<body>
    ${mav }
</body>
</html>

　　在success.jsp中添加触发条件

<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
<%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
<!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>hello world</title>
</head>
<body>
    Hello world!
    <c:redirect url="/app/return/test1" />
</body>
</html>

　　地址栏输入测试，完成。

最后完整版如下，Java代码：

/**
 * 项目名称：Spring3mvc demo
 * Copyright © 2010-2012 spartacus.org.cn All Rights Reserved
 */
package cn.org.spartacus.spring;  

import java.util.Map;  

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;  

import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.ui.ModelMap;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.View;  

/**
 * Description: TODO
 *
 * @author hankaibo
 * @date 2012-11-4
 * @version v1.0
 */
@Controller
// 添加注解，这样配置文件就可以找到它了。
@RequestMapping("return")
public class ReturnController {
    /**
     * <p>
     * Description: 测试一，返回ModelAndVie类型
     * </p>
     *
     * @param
     * @return ModelAndView
     */
    @RequestMapping(value = "test1", method = RequestMethod.GET)
    public ModelAndView test1(HttpServletRequest request, HttpServletResponse response) {
        ModelAndView mav = new ModelAndView();
        mav.setViewName("return/mav"); // 设置返回的文件名
        mav.addObject("mav", "我的返回类型是ModelAndView.");
        return mav;  

    }  

    /**
     * <p>
     * Description: 跳转到界面为 类路径@RequestMapping的值+方法@RequestMapping的值组成的页面
     * </p>
     *
     * @param
     * @return Model
     * @throws
     */
    @RequestMapping("test2")
    public Model test2(Model model) {
        model.addAttribute("model", "我的返回类型是Model");
        return model;  

    }  

    /**
     * <p>
     * Description: 跳转到界面为 类路径@RequestMapping的值+方法@RequestMapping的值组成的页面
     * </p>
     *
     * @param
     * @return ModelMap
     * @throws
     */
    @RequestMapping("test3")
    public ModelMap test3(ModelMap modelMap) {
        modelMap.addAttribute("modelMap", "我的返回类型是ModelMap");
        return modelMap;
    }  

    /**
     * <p>
     * Description: 跳转到界面为 类路径@RequestMapping的值+方法@RequestMapping的值组成的页面
     * </p>
     *
     * @param
     * @return Map
     * @throws
     */
    @RequestMapping("test4")
    public Map test4(Map map) {
        map.put("map", "我的返回类型是Map");
        return map;
    }  

    /**
     * <p>Description: TODO 返回的页面可以为pdf,excel等。</p>
     * @param
     * @return View
     * @throws
     */
    @RequestMapping("test5")
    public View test5(){
        return null;
    }  

    /**
     * <p>Description: 跳转到界面为 类路径@RequestMapping的值+方法@RequestMapping的值组成的页面</p>
     * @param
     * @return void
     * @throws
     */
    @RequestMapping("test6")
    public void test6(Map<String,Object> map){
        map.put("void","我的返回类型是void");
    }
    /**
     * <p>Description: TODO</p>
     * @param
     * @return String
     * @throws
     */
    @RequestMapping("test7")
    public String test7(Map<String,Object> map){
        map.put("string", "我的返回类型是String");
        return "return/string";
    }
}

　　jsp代码如下：

<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
<%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
<!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>hello world</title>
</head>
<body>
    Hello world!
    <c:redirect url="/app/return/test1" />
    <%--
    <c:redirect url="/app/return/test2" />
    <c:redirect url="/app/return/test3" />
    <c:redirect url="/app/return/test4" />
    <c:redirect url="/app/return/test5" />
    <c:redirect url="/app/return/test6" />
    <c:redirect url="/app/return/test7" />
     --%>
</body>
</html>

　　最后附上代码结构图：