SPRINGMVC parameters Verify the use of Bindingresult result __SPRINGMVC

Http://blog.sina.com.cn/s/blog_6829be5c0101alxh.html a very detailed explanation and worthy of further discussion

http://bbs.csdn.net/topics/360254599 Simple and clear

1. Import dependent Packages First Bean-validator.jar

2. Write some relevant validation information on the entity class: You can search for more verification methods, which is only part of the

can refer to: Click on open Link http://blog.csdn.net/caihaijiang/article/details/7463514

Private String username;
	private String password;
	Private String nickname;
	private String Email;
	
	Public user () {
	}

	@NotEmpty (message= "User name cannot be empty") public
	String GetUserName () {return
		username;
	}

	public void Setusername (String username) {
		this.username = username;
	}

	@Size (min=1,max=10,message= "Password length should be between 1 and 10") Public
	String GetPassword () {return
		password;
	}

	public void SetPassword (String password) {
		this.password = password;
	}

	Public String Getnickname () {return
		nickname;
	}

	public void Setnickname (String nickname) {
		this.nickname = nickname;
	}

	@Email (message= "Malformed mailbox") Public
	String Getemail () {return
		email;
	}

	public void Setemail (String email) {
		This.email = email;
	}

3. Background controller processing

@RequestMapping ("save") public
    String Save (@Valid User user,bindingresult result) {
        //
        if ( Result.haserrors ()) {
            list<objecterror> ls=result.getallerrors ();
            for (int i = 0; i < ls.size (); i++) {
                System.out.println ("Error:" +ls.get (i));
            }
        return "AddUser";
    }

An in-depth analysis of Bindingresult: If you use the interface to return information, you can directly get the error message in Bindingresult

if (Br.haserrors ()) {
			//If there is an error jump directly to the Add view
			fielderror fielderror= br.getfielderror ();
			System.out.println (Fielderror.getdefaultmessage ());
			
			list<fielderror> list = Br.getfielderrors ();
			for (Fielderror fielderror2:list) {
				System.out.println (fielderror2.getdefaultmessage ());
			}
			List<objecterror> ls=br.getallerrors ();
            for (int i = 0; i < ls.size (); i++) {
                System.out.println ("Error:" +ls.get (i). Getdefaultmessage ());
			return "User/add";
		}