SpringBoot多种场景传参模式

@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的参数不能传空值

       // required:表示是否必须要传值

       // defaultValue:当没有该请求参数时,SpringMVC给请求参数的默认值

       System.out.println(name);

       System.out.println(pwd);

       return null ;

}

@RequestMapping ( "/test03" )

public ModelAndView test03( @ModelAttribute ( "stu" ) Student student){

     /*可以使用对象作为方法的形参,同时接受接受前台的多个请求参数

       SpringMVC会基于同名匹配,将请求参数的值注入对应的对象中的属性中

       @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);

    }

/*对于参数名相同的多个请求参数,可以直接使用数组作为方法的形参接收

   可以使用对象中的集合属性接收*/

@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 ;

}