处理器返回值 数值 字符串 自定义 map list 类型

返回数值

@Controllerpublic class returnObject {    @RequestMapping("/first")    @ResponseBody    public Object doFirst()    {        return 1;    }

//返回字符串    @RequestMapping(value = "/str")    @ResponseBody    public String dos()    {        return "么么哒";    }           
public class userInfo {    private String name;    private int  age;    public String getName() {        return name;    }    public void setName(String name) {        this.name = name;    }    public int getAge() {        return age;    }    public void setAge(int age) {        this.age = age;    }}

// /处理器返回值 List    @RequestMapping(value = "lis")    @ResponseBody    public  Object  doList(){        List<userInfo> list=new ArrayList<userInfo>();        userInfo info=new userInfo();        info.setName("啦啦");        info.setAge(12);        return list;    }

 @RequestMapping(value = "/third")    @ResponseBody    public Object doThird(){        UserInfo info=new UserInfo();        info.setName("星星");        info.setAge(20);        return info;    }    @RequestMapping(value = "/four")    @ResponseBody    public Object doFour(){        Map<String,UserInfo> map=new HashMap<String, UserInfo>();        UserInfo info=new UserInfo();        info.setName("微冷的雨");        info.setAge(20);        UserInfo info2=new UserInfo();        info2.setName("微冷的雨2");        info2.setAge(20);        map.put(info.getName(),info);        map.put(info2.getName(),info2);        return map;    }    @RequestMapping(value = "/five")    @ResponseBody    public Object doFive(){       List<UserInfo> list=new ArrayList<UserInfo>();        UserInfo info=new UserInfo();        info.setName("微冷的雨");        info.setAge(20);       list.add(info);        return list;    }

需要导入的两个jar包

  <dependency>      <groupId>com.fasterxml.jackson.core</groupId>      <artifactId>jackson-core</artifactId>      <version>2.8.1<ersion>    </dependency>    <dependency>      <groupId>com.fasterxml.jackson.core</groupId>      <artifactId>jackson-databind</artifactId>      <version>2.5.1<ersion>    </dependency>
package cn.happy.controller06exception;import org.springframework.stereotype.Controller;import org.springframework.web.bind.annotation.RequestMapping
e cn.happy.controller05requestdirect;import org.springframework.stereotype.Controller;import org.springframework.web.bind.annotation.RequestMapping;import javax.servlet.http.HttpServletRequest;/** * Created by Happy on 2017-08-20. */@Controllerpublic class FirstController {    @RequestMapping("/add")     public String addUser(){         return "/WEB-INF/insert.jsp";     }    @RequestMapping("/addUser")    public String addRealUser(HttpServletRequest request){        request.setAttribute("happy","goodperson");        return "/listUser";    }    @RequestMapping("/listUser")    public String list(){        return "/WEB-INF/list.jsp";    }    @RequestMapping("/addUser2")    public String addRealUser2(HttpServletRequest request){        request.setAttribute("happy","goodperson");        return "redirect:/listUser2";    }    @RequestMapping("/listUser2")    public String list2(){        return "redirect:/list2.jsp";    }}
@Controllerpublic class FirstController {    @RequestMapping("/list")    public String list(){        //构造异常        int result=5/0;        return "/WEB-INF/list.jsp";    }}