Data check (checksum background hibernate validate)

1, the first package to be imported jar

2, was added annotation corresponding entity classes

Package com.zhiyou100.zjc.bean; 

Import javax.validation.constraints.Pattern; 

Import org.hibernate.validator.constraints.Length;
 Import org.hibernate.validator.constraints.NotEmpty; 

public  class the User {
    the @NotEmpty (Message = " user name is not empty " )
     Private String username;
    @Length (min =. 6, max = 18 is, Message =" password length 18 is between ~. 6 " )
     Private String password;
     @Pattern (regexp =" / ^. 1 ([ 38] [0-9] | 4 [ 579] | 5 [0-3,5-9] | 6 [6] | 7 [0135678] | 9 [89]) \\ d {8} $ / ", message = "phone number is not formatted correctly" )
     Private String phone;
    public String getUsername() {
        return username;
    }
    public void setUsername(String username) {
        this.username = username;
    }
    public String getPassword() {
        return password;
    }
    public void setPassword(String password) {
        this.password = password;
    }
    public String getPhone() {
        return phone;
    }
    public void setPhone(String phone) {
        this.phone = phone;
    }

}

The figure below shows the meaning of each annotation:

3, when receiving the control layer parameter

package com.zhiyou100.zjc.controller;

import java.util.HashMap;
import java.util.List;
import java.util.Map;

import javax.validation.Valid;

import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.validation.BindingResult;
import org.springframework.validation.FieldError;
import org.springframework.web.bind.annotation.RequestMapping;

import com.zhiyou100.zjc.bean.User;

@Controller
public class UserController {
    
    @RequestMapping("login")// If not logged in, access to the requested address is being knocked to the login screen
     // @Valid: check the parameter object
     // BindingResult: encapsulates all validation error messages 
    public String the Login (@Valid the User the User, BindingResult br, Model Model ) {
         IF (br.hasErrors ()) { // decided whether or not an error message 
            List <FieldError> fieldErrors br.getFieldErrors = (); // wait until all error messages 
            the Map <String, Object> = ERRORMSG new new the HashMap <String, Object> ();
             for (FieldError errors: fieldErrors) {
                 // getField () field error obtained getDefaultMessage () error message obtained 
                 errormsg.put (errors.getField (), errors.getDefaultMessage ( ));
                System.out.println (errors.getField () + "----" +errors.getDefaultMessage());
            }
            model.addAttribute("msg", errormsg);
            return "forward:index.jsp";
        }
        return "list";
    }
}

Front-end code

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
    <form action="login" method="post">
        用户名:<input type="text" name="username"/>${msg.username }<br>
        密码:<input type="text" name="password">${msg.password }<br>
        电话:<input type="text" name="phone">${msg.phone }<br>
        <input type="submit"form</>= "Login"value
    >
</body>
</html>

When login, test results

springMVC (eight) - data verification (background check hibernate validate).

Data check (checksum background hibernate validate)

1, the first package to be imported jar

2, was added annotation corresponding entity classes

3, when receiving the control layer parameter

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