SpringMVC_@ModelAttribute

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有 @ModelAttribute 标记的方法, 会在每个目标方法执行之前被 SpringMVC 调用

	<form action="springmvc/TestModelAttribute" method="post">
		用户名<input type="text" name="username" value="wang"/><br/>
		年龄<input type="text" name="age"  value="12"/>
		<input type="submit" value="测试ModelAttribute">
	</form>

	@ModelAttribute
	public void getUser(@RequestParam(value="username",required=false) String username,Map<String,Object> map){
		if(username!=null){
			User user=new User("wang","123",50);
			System.out.println("xiugai => username:"+user.getUsername()+",password:"+user.getPassword()+",Age:"+user.getAge());
			//放入的键 是类名首字母小写
			map.put("user", user);
		}
	}
	@RequestMapping("/TestModelAttribute")
	public String TestModelAttribute(User user){
		System.out.println("gengxin => username:"+user.getUsername()+",password:"+user.getPassword()+",Age:"+user.getAge());
		return SUCCESS;
	}

所以，执行TestModelAttribute方法前，先执行getUser方法