Spring 框架 web 5.0.4.RELEASE jar

package oo544.xyz.controller; import java.util.HashMap; import java.util.Map; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestParam; import org.springframework.web.bind.annotation.ResponseBody; import org.springframework.web.servlet.ModelAndView; @Controller @RequestMapping("hello") public class HelloController { @RequestMapping("hi") public ModelAndView HI(@RequestParam(required = false, value = "msg", defaultValue = "haha") String msg) { ModelAndView mav = new ModelAndView("hello"); mav.addObject("msg", msg); return mav; } @RequestMapping("josn") public @ResponseBody Map<String, Object> json() { Map<String, Object> jsonMap = new HashMap<>(); jsonMap.put("a", "hahaha"); jsonMap.put("b", 123); return jsonMap; } }