SpringMVC的注解(4)

/**
	 * @RequestParam来映射请求参数
	 * value值即为请求参数参数名
	 * required表示该参数是否必须，默认为true必须
	 * defaultValue表示该请求参数的默认值
	 */
	@RequestMapping("/testRequestParam")
	public String testRequestParam(@RequestParam(value="username")String name,
								 	@RequestParam(value="pwd")String pwd,
								 	@RequestParam(value="age", required=false, defaultValue="0")int age) {
		System.out.println("username="+name);
		System.out.println("pwd="+pwd);
		System.out.println("age="+age);
		return success;
	}

/*
	 * 目标方法的返回值可以是ModelAndView类型
	 * 其中可以包含视图和模型信息
	 * SpringMVC会将ModelAndView的model中数据放入request域中
	 */
	@RequestMapping("/testModelAndView")
	public ModelAndView testModelAndView() {
		String viewName=success;
		ModelAndView modelAndView=new ModelAndView(viewName);
		User user1=new User("zsl","123","aa@163.com",12,new Address("Beijing","Beijing"));
		User user2=new User("wc","123","bb@163.com",21,new Address("Jiangxi","LePing"));
		List
 
   list=new ArrayList<>();
		list.add(user1);
		list.add(user2);
		modelAndView.addObject("studentMsg",list);
		return modelAndView;
	}