springboot learning notes

Keywords: Java Spring Mybatis Thymeleaf SpringBoot

(V) springboot integrates the thmeleaf template to realize simple login

1. Modify the user table in the note in the previous section, add a password field, and require the username to be UNIQUE to realize login verification. The table structure is as follows.

CREATE TABLE `user` (
  `id` int(11) unsigned NOT NULL AUTO_INCREMENT,
  `name` varchar(128) NOT NULL COMMENT 'Name',
  `phone` varchar(16) DEFAULT NULL COMMENT 'User mobile number',
  `create_time` datetime DEFAULT NULL COMMENT 'Creation time',
  `age` int(4) DEFAULT NULL COMMENT 'Age',
  `password` varchar(45) NOT NULL COMMENT 'Password',
  PRIMARY KEY (`id`),
  UNIQUE KEY `name_UNIQUE` (`name`)
) ENGINE=InnoDB AUTO_INCREMENT=26 DEFAULT CHARSET=utf8

2. Add a new method to query user by name. The specific code will not be written

3. Add thmeleaf dependency in pom file

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-thymeleaf</artifactId>
        </dependency>

4. The index.html page is placed in the templates folder. In order to beautify the page, I used a template. The css file and image file are placed in the new folder under the static directory, and the code will not be uploaded.

<!DOCTYPE html>
<html>
<head>
    <title>Login</title>
        <meta charset="utf-8">
        <link href="/css/style.css" rel='stylesheet' type='text/css' />
        <meta name="viewport" content="width=device-width, initial-scale=1">
        <script type="application/x-javascript"> addEventListener("load", function() { setTimeout(hideURLbar, 0); }, false); function hideURLbar(){ window.scrollTo(0,1); } </script>
</head>
<body>
     <div class="main">
        <div class="login-form">
            <h1>User login</h1>
                    <div class="head">
                        <img src="/images/user.png" alt=""/>
                    </div>
                <form enctype="multipart/form-data" method="post" action="/user/login">
                        <input type="text" class="text" name="username" value="User name"  >
                        <input type="password" name="password" value="password" >
                        <div class="submit">
                            <input type="submit" value="Land">
                         </div>    
                    <p><a href="#">Forget password ?</a></p>
                </form>
            </div>
        </div>
                
</body>
</html>

5. To ensure static file loading, you need to configure in application.properties

#Load static files, otherwise there may be problems in loading css, image and other files
spring.mvc.static-path-pattern=/**
#It is recommended to turn off cache during development for debugging
spring.thymeleaf.cache=false

6. Write a Controller to realize login and user verification

/**
 * 
 */
package com.zc.mybatis.controller;

import java.util.Date;

import javax.servlet.http.HttpServletRequest;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

import com.zc.mybatis.domain.User;
import com.zc.mybatis.service.UserService;

/**
 * @author zhangchao
 *
 */
@Controller
public class LoginController {
    //Landing page
    @RequestMapping(value = "/")
    public Object hello() {
        return "index";
    }

    @Autowired
    private UserService userService;
    //Add test users
    @RequestMapping(value="/user/add")
    @ResponseBody
    public Object addUsers() {
        User user = new User();
        for(int i = 1;i<6;i++) {
            user.setName("user"+i);
            user.setPassword("123456");
            user.setPhone("124514144411");
            user.setAge(19);
            user.setCreateTime(new Date());        
            userService.add(user);
        }
        return "New test user";
    }
    //User calibration
    @RequestMapping(value = "/user/login")
    @ResponseBody
    public Object login(HttpServletRequest request) {
        String username = request.getParameter("username");
        String password = request.getParameter("password");
        password = password.trim();
        User user = userService.getUserByName(username);
        if (null != user && password.equals(user.getPassword())) {
            return "Landing successfully";
        } else {
            return "Landing failed";
        }
    }
}

7. Run localhost:8080/user/add to add a new test user, and then access the login page through localhost:8080. Enter the user name: user 1, password: 123456, and the page returns to login successfully.

Posted by James25 on Wed, 04 Dec 2019 21:47:35 -0800

Programmer Group

springboot learning notes

(V) springboot integrates the thmeleaf template to realize simple login

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