springMVC整合json

package com.cn.action; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.ResponseBody; import org.springframework.web.servlet.ModelAndView; import com.cn.domain.User; @Controller public class UserAction { @RequestMapping("/login") public ModelAndView login(String name, int age) { System.out.println(name + age); return null; } @RequestMapping("/selectAll") @ResponseBody public Object selectAll() { System.out.println("/selectAll"); User user = new User(); user.setId(1); user.setPassword("123"); user.setUserName("zhangsan"); return user; } }