@RequestMapping("/test01")
public ModelAndView test01(HttpServletRequest request){
      String username = request.getParameter("username");
      String password = request.getParameter("password");

      System.out.println(username);
      System.out.println(password);
      return null;
}

@RequestMapping("/test02_1")
public ModelAndView test02_1(String username,String password){
      System.out.println(username);
      System.out.println(password);
      return null;
}
@RequestMapping("/test02_2")
public ModelAndView test02_2(@RequestParam("username") String name,@RequestParam(value = "password",defaultValue = "1234987") String pwd){
      //使用了@RequestParam的參數(shù)不能傳空值
      // required:表示是否必須要傳值
      // defaultValue:當(dāng)沒有該請(qǐng)求參數(shù)時(shí),SpringMVC給請(qǐng)求參數(shù)的默認(rèn)值
      System.out.println(name);
      System.out.println(pwd);
      return null;
}

@RequestMapping("/test03")

public ModelAndView test03(@ModelAttribute("stu") Student student){
    /*可以使用對(duì)象作為方法的形參,同時(shí)接受接受前臺(tái)的多個(gè)請(qǐng)求參數(shù)
      SpringMVC會(huì)基于同名匹配,將請(qǐng)求參數(shù)的值注入對(duì)應(yīng)的對(duì)象中的屬性中
      @ModelAttribute起名字key值*/
      System.out.println(student);
      ModelAndView mv = new ModelAndView();
      mv.setViewName("test2");
      return mv;
}

 @PostMapping("/register")
    public Result bodyParams(@RequestBody Users users) {
        return ResultResponse.success(users);
    }

    /*對(duì)于參數(shù)名相同的多個(gè)請(qǐng)求參數(shù),可以直接使用數(shù)組作為方法的形參接收
      可以使用對(duì)象中的集合屬性接收*/
    @DeleteMapping("/del")
    public Result listParams(String[] ids) {
        return ResultResponse.success(ids);
    }

@RequestMapping("/delete/{id}")
public ModelAndView test4(@PathVariable("id")Long id){
    System.out.println("delete");
    System.out.println(id);
    return null;
}