SpringMVC四种响应传值的方式

 @RequestMapping("/test1")
public void test1(HttpServletRequest request, HttpServletResponse response) throws Exception{
      //通过request和response控制页面和共享数据
      request.setAttribute("msg","你好，太阳");
      request.getRequestDispatcher("views/test.jsp").forward(request,response);
}

@RequestMapping("/test2")
public ModelAndView test2(){
      //通过moderAndView对象控制页面和共享数据
      ModelAndView mv = new ModelAndView();
      mv.setViewName("test");
      mv.addObject("msg","你好，月亮");
      return mv;
}

@RequestMapping("/test3")
public String test3(Model model){
      //使用model对象进行共享数据，使用返回的字符串进行控制页面
      model.addAttribute("msg","你好，星星");
      model.addAttribute(new User("qq","123"));
      return "test";
}

@RequestMapping("/test4")
public String test4(Model model){
      //使用forward和redirect可以控制重定向或请求转发，此时不会再加前后缀
      model.addAttribute("msg","你好，星星");
      model.addAttribute(new User("qq","1234"));
      return "forward:views/test.jsp";
}

@RequestMapping("/test5")
public User test5(){
      //使用访问路径名+.jsp作为返回路径
      return new User("mike","xxxx");
}

        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-annotations</artifactId>
            <version>2.9.6</version>
        </dependency>

        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-core</artifactId>
            <version>2.9.6</version>
        </dependency>

        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-databind</artifactId>
            <version>2.9.6</version>
        </dependency>

@Setter@Getter@ToString
@AllArgsConstructor
@NoArgsConstructor
public class Employee {
　　//在转换成JSON格式时忽略该属性
　　 @JsonIgnore
    private Integer id;
    private String name;
    //在转换成JSON格式时进行格式化
    @JsonFormat(pattern = "yyyy-MM-dd")
    private Date birthday;
    //在转换成JSON格式时起别名
    @JsonProperty("gender")
    private Boolean sex;
    //使返回的字符串按照自己设定的格式格式集合即可
    public Map toJsonMap(){
        SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd");
        Map map = new HashMap();
        map.put("id",this.id);
        map.put("name",this.name);
        map.put("birthday",format.format(this.birthday));
        map.put("gender",this.sex);
        return map;
    }
}

@RequestMapping("/test8")
@ResponseBody
public Employee test8(){
     return new Employee(1,"张三",new Date(),true);
}

@RequestMapping("/test9")
@ResponseBody
public Object test9(){
    Employee employee = new Employee(1,"张三",new Date(),true);
    return employee.toJsonMap();
}