Spring Boot Security使用 JDBC 和 MySQL 进行 RBAC，自定义登录验证，登录界面增加kaptcha验证码

Dear 丶 2023-09-25 12:44 43阅读 0赞

在本教程中，我将指导您如何编写代码，以使用具有基于表单的身份验证的Spring安全API来保护Spring Boot应用程序中的网页。用户详细信息存储在MySQL数据库中，并使用春季JDBC连接到数据库。我们将从[本教程][Link 1]中的 ProductManager 项目开始，向现有的弹簧启动项目添加登录和注销功能。

### **1. 创建用户表和虚拟凭据** ###

凭据应存储在数据库中，因此让我们创建新表，表间关系ER图如下：

![dc16805f4da24a84ae935e44f04f5f84.png][]

-- --------------------------------------------------------
    -- 主机:                           127.0.0.1
    -- 服务器版本:                        8.0.22 - MySQL Community Server - GPL
    -- 服务器操作系统:                      Win64
    -- HeidiSQL 版本:                  12.1.0.6537
    -- --------------------------------------------------------
    
    /*!40101 SET @OLD_CHARACTER_SET_CLIENT=@@CHARACTER_SET_CLIENT */;
    /*!40101 SET NAMES utf8 */;
    /*!50503 SET NAMES utf8mb4 */;
    /*!40103 SET @OLD_TIME_ZONE=@@TIME_ZONE */;
    /*!40103 SET TIME_ZONE='+00:00' */;
    /*!40014 SET @OLD_FOREIGN_KEY_CHECKS=@@FOREIGN_KEY_CHECKS, FOREIGN_KEY_CHECKS=0 */;
    /*!40101 SET @OLD_SQL_MODE=@@SQL_MODE, SQL_MODE='NO_AUTO_VALUE_ON_ZERO' */;
    /*!40111 SET @OLD_SQL_NOTES=@@SQL_NOTES, SQL_NOTES=0 */;
    
    
    -- 导出 product3 的数据库结构
    CREATE DATABASE IF NOT EXISTS `product3` /*!40100 DEFAULT CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci */ /*!80016 DEFAULT ENCRYPTION='N' */;
    USE `product3`;
    
    -- 导出  表 product3.permissions 结构
    CREATE TABLE IF NOT EXISTS `permissions` (
      `name` varchar(30) CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci NOT NULL,
      `description` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci DEFAULT NULL,
      PRIMARY KEY (`name`)
    ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
    
    -- 正在导出表  product3.permissions 的数据：~3 rows (大约)
    INSERT INTO `permissions` (`name`, `description`) VALUES
    	('ADMIN', NULL),
    	('DELETE', 'delete'),
    	('READ', 'read'),
    	('WRITE', 'write');
    
    -- 导出  表 product3.product 结构
    CREATE TABLE IF NOT EXISTS `product` (
      `id` bigint NOT NULL AUTO_INCREMENT,
      `brand` varchar(255) COLLATE utf8mb4_unicode_ci DEFAULT NULL,
      `madein` varchar(255) COLLATE utf8mb4_unicode_ci DEFAULT NULL,
      `name` varchar(255) COLLATE utf8mb4_unicode_ci DEFAULT NULL,
      `price` float NOT NULL,
      PRIMARY KEY (`id`)
    ) ENGINE=InnoDB AUTO_INCREMENT=3 DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
    
    -- 正在导出表  product3.product 的数据：~1 rows (大约)
    INSERT INTO `product` (`id`, `brand`, `madein`, `name`, `price`) VALUES
    	(1, '666', '666', '数据库', 222);
    
    -- 导出  表 product3.roles 结构
    CREATE TABLE IF NOT EXISTS `roles` (
      `name` varchar(20) CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci NOT NULL,
      `description` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci DEFAULT NULL,
      PRIMARY KEY (`name`)
    ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
    
    -- 正在导出表  product3.roles 的数据：~3 rows (大约)
    INSERT INTO `roles` (`name`, `description`) VALUES
    	('ADMIN', 'Administrator role'),
    	('USER_P1', 'Perfil 1'),
    	('USER_P2', 'Perfil 2');
    
    -- 导出  表 product3.roles_permissions 结构
    CREATE TABLE IF NOT EXISTS `roles_permissions` (
      `role_name` varchar(20) CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci NOT NULL,
      `permission` varchar(30) CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci NOT NULL,
      PRIMARY KEY (`role_name`,`permission`),
      KEY `RP_1` (`role_name`),
      KEY `RP_2` (`permission`),
      CONSTRAINT `RP_1` FOREIGN KEY (`role_name`) REFERENCES `roles` (`name`),
      CONSTRAINT `RP_2` FOREIGN KEY (`permission`) REFERENCES `permissions` (`name`)
    ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
    
    -- 正在导出表  product3.roles_permissions 的数据：~4 rows (大约)
    INSERT INTO `roles_permissions` (`role_name`, `permission`) VALUES
    	('ADMIN', 'ADMIN'),
    	('ADMIN', 'DELETE'),
    	('ADMIN', 'READ'),
    	('ADMIN', 'WRITE'),
    	('USER_P1', 'READ'),
    	('USER_P2', 'DELETE'),
    	('USER_P2', 'WRITE');
    
    -- 导出  表 product3.users 结构
    CREATE TABLE IF NOT EXISTS `users` (
      `username` varchar(15) CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci NOT NULL,
      `email` varchar(100) CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci DEFAULT NULL,
      `name` varchar(65) CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci DEFAULT NULL,
      `password` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci NOT NULL,
      `enabled` int DEFAULT NULL,
      PRIMARY KEY (`username`)
    ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
    
    -- 正在导出表  product3.users 的数据：~3 rows (大约)
    INSERT INTO `users` (`username`, `email`, `name`, `password`, `enabled`) VALUES
    	('admin', 'admin@example.com', 'Administrator', '$2a$10$2/LSmp3YoEOT97KzgrYODen7I88ErBovM2Qehw9DL1dW9DZ7DZSAm', 1),
    	('u1', 'u1@example.com', 'User P1', '$2a$10$2/LSmp3YoEOT97KzgrYODen7I88ErBovM2Qehw9DL1dW9DZ7DZSAm', 1),
    	('u2', 'u2@example.com', 'User P2', '$2a$10$2/LSmp3YoEOT97KzgrYODen7I88ErBovM2Qehw9DL1dW9DZ7DZSAm', 1);
    
    -- 导出  表 product3.users_roles 结构
    CREATE TABLE IF NOT EXISTS `users_roles` (
      `username` varchar(15) CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci NOT NULL,
      `role_name` varchar(20) CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci NOT NULL,
      PRIMARY KEY (`username`,`role_name`),
      KEY `UR_1` (`username`),
      KEY `UR_2` (`role_name`),
      CONSTRAINT `UR_1` FOREIGN KEY (`username`) REFERENCES `users` (`username`),
      CONSTRAINT `UR_2` FOREIGN KEY (`role_name`) REFERENCES `roles` (`name`)
    ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
    
    -- 正在导出表  product3.users_roles 的数据：~0 rows (大约)
    INSERT INTO `users_roles` (`username`, `role_name`) VALUES
    	('admin', 'ADMIN'),
    	('u1', 'USER_P1'),
    	('u2', 'USER_P2');
    
    /*!40103 SET TIME_ZONE=IFNULL(@OLD_TIME_ZONE, 'system') */;
    /*!40101 SET SQL_MODE=IFNULL(@OLD_SQL_MODE, '') */;
    /*!40014 SET FOREIGN_KEY_CHECKS=IFNULL(@OLD_FOREIGN_KEY_CHECKS, 1) */;
    /*!40101 SET CHARACTER_SET_CLIENT=@OLD_CHARACTER_SET_CLIENT */;
    /*!40111 SET SQL_NOTES=IFNULL(@OLD_SQL_NOTES, 1) */;

### **2. 配置数据源属性** ###

接下来，在应用程序属性文件中指定数据库连接信息，如下所示：根据您的MySQL数据库更新URL，用户名和密码。

spring.jpa.hibernate.ddl-auto=update
    spring.datasource.url=jdbc:mysql://localhost:3306/product3?autoReconnect=true&useSSL=false&useUnicode=true&characterEncoding=UTF-8&serverTimezone=Asia/Shanghai
    spring.datasource.username=root
    spring.datasource.password=root
    #logging.level.root=WARN

### **3. 声明弹簧安全性和 MySQL JDBC 驱动程序的依赖关系** ###

要将Spring安全API用于项目，请在pom.xml文件中声明以下依赖项：并且要将JDBC与弹簧启动和MySQL一起使用：请注意，依赖项版本已由弹簧启动初学者父项目定义。

<?xml version="1.0" encoding="UTF-8"?>
    <project xmlns="http://maven.apache.org/POM/4.0.0"
             xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
             xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
        <modelVersion>4.0.0</modelVersion>
        <parent>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-parent</artifactId>
            <version>2.7.4</version>
            <relativePath /> 
        </parent>
        <groupId>net.codejava</groupId>
        <artifactId>ProductManagerJDBCAuthenticationManuallyAuthenticateCaptcha</artifactId>
        <version>2.0</version>
        <name>ProductManagerJDBCAuthenticationManuallyAuthenticateCaptcha</name>
        <description>ProductManagerJDBCAuthentication</description>
        <packaging>jar</packaging>
    
        <properties>
            <java.version>1.8</java.version>
        </properties>
    
        <dependencies>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-data-jpa</artifactId>
            </dependency>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-thymeleaf</artifactId>
            </dependency>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-web</artifactId>
            </dependency>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-devtools</artifactId>
            </dependency>
            <dependency>
                <groupId>mysql</groupId>
                <artifactId>mysql-connector-java</artifactId>
                <scope>runtime</scope>
            </dependency>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-security</artifactId>
            </dependency>
            <dependency>
                <groupId>org.thymeleaf.extras</groupId>
                <artifactId>thymeleaf-extras-springsecurity5</artifactId>
            </dependency>
            <dependency>
                <groupId>com.github.penggle</groupId>
                <artifactId>kaptcha</artifactId>
                <version>2.3.2</version>
            </dependency>
        </dependencies>
    
        <build>
            <plugins>
                <plugin>
                    <groupId>org.springframework.boot</groupId>
                    <artifactId>spring-boot-maven-plugin</artifactId>
                </plugin>
            </plugins>
        </build>
    
    </project>

### **4. 配置 JDBC 身份验证详细信息** ###

要将 Spring 安全性与基于表单的身份验证和 JDBC 结合使用，请按如下方式创建 WebSecurityConfig 类：

package net.codejava;
    
    import javax.sql.DataSource;
    
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.context.annotation.Bean;
    import org.springframework.context.annotation.Configuration;
    import org.springframework.http.HttpMethod;
    import org.springframework.security.authentication.AuthenticationManager;
    import org.springframework.security.config.annotation.authentication.builders.AuthenticationManagerBuilder;
    import org.springframework.security.config.annotation.web.builders.HttpSecurity;
    import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
    import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
    import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
    
    @Configuration
    @EnableWebSecurity
    public class WebSecurityConfig extends WebSecurityConfigurerAdapter {
    
        @Autowired
        private DataSource dataSource;
    
        @Bean
        @Override
        public AuthenticationManager authenticationManagerBean() throws Exception {
            return super.authenticationManagerBean();
        }
    
        @Autowired
        public void configAuthentication(AuthenticationManagerBuilder authBuilder) throws Exception {
            authBuilder.jdbcAuthentication()
                    .dataSource(dataSource)
                    .passwordEncoder(new BCryptPasswordEncoder())
                    .usersByUsernameQuery("select username, password, enabled from users where username=?")
                    .authoritiesByUsernameQuery("SELECT users.username,permissions.name FROM users,roles,users_roles,permissions,roles_permissions WHERE users.username=users_roles.username AND roles.name=users_roles.role_name AND roles.name=roles_permissions.role_name AND permissions.name=roles_permissions.permission AND users.username=?");
        }
    
        @Override
        protected void configure(HttpSecurity http) throws Exception {
            http.authorizeRequests()
                    .antMatchers("/edit/*", "/delete/*").hasAnyAuthority("ADMIN")
                    .antMatchers("/common/**").permitAll()
                    .antMatchers("/login").permitAll()
                    .antMatchers("/verify").permitAll()
                    .anyRequest().authenticated()
                    .and()
                    .formLogin().loginPage("/login")
                    .permitAll()
                    .and()
                    .logout().permitAll()
                    .and()
                    .exceptionHandling().accessDeniedPage("/403");
        }
    
    }

此安全配置类必须使用@EnableWebSecurity注释进行批注，并且是 Web 安全配置器适配器的子类。数据源对象的实例将由Spring框架创建并注入：

@Autowired
        private DataSource dataSource;

它将从应用程序属性文件中读取数据库连接信息。要使用JDBC配置身份验证，请编写以下方法：

@Autowired
        public void configAuthentication(AuthenticationManagerBuilder authBuilder) throws Exception {
            authBuilder.jdbcAuthentication()
                    .dataSource(dataSource)
                    .passwordEncoder(new BCryptPasswordEncoder())
                    .usersByUsernameQuery("select username, password, enabled from users where username=?")
                    .authoritiesByUsernameQuery("SELECT users.username,permissions.name FROM users,roles,users_roles,permissions,roles_permissions WHERE users.username=users_roles.username AND roles.name=users_roles.role_name AND roles.name=roles_permissions.role_name AND permissions.name=roles_permissions.permission AND users.username=?");
        }

如您所见，我们需要指定密码编码器（建议使用BCrypt），数据源和两个SQL语句：第一个根据用户名选择用户，第二个选择用户的角色。请注意，Spring安全性要求列名必须是用户名，密码，启用和角色。为了配置基于表单的身份验证，我们重写了 configure（HttpSecurity） 方法，如下所示：

@Override
        protected void configure(HttpSecurity http) throws Exception {
            http.authorizeRequests()
                    .antMatchers("/edit/*", "/delete/*").hasAnyAuthority("ADMIN")
                    .anyRequest().authenticated()
                    .and()
                    .formLogin().permitAll()
                    .and()
                    .logout().permitAll()
                    .and()
                    .exceptionHandling().accessDeniedPage("/403");
        }

在这里，我们指定所有请求都必须进行身份验证，这意味着用户必须登录才能使用该应用程序。使用Spring安全性提供的默认登录表单。要显示已登录用户的用户名，请在Thymeleaf模板文件中编写以下代码：

<div sec:authorize="isAuthenticated()">
                    Welcome <b><span sec:authentication="name">Username</span></b>
                     
                    <i><span sec:authentication="principal.authorities">Roles</span></i>
                </div>

并添加注销按钮：

如您所见，Spring Security将处理应用程序的登录和注销。我们不必编写重复的代码，只需指定一些配置即可。

### 5.自定义登录验证过程 ###

package net.codejava;
    
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.stereotype.Controller;
    import org.springframework.util.StringUtils;
    import org.springframework.web.bind.annotation.*;
    
    import javax.servlet.http.HttpSession;
    import org.springframework.security.authentication.AuthenticationManager;
    import org.springframework.security.authentication.UsernamePasswordAuthenticationToken;
    import org.springframework.security.core.Authentication;
    import org.springframework.security.core.context.SecurityContext;
    import org.springframework.security.core.context.SecurityContextHolder;
    import static org.springframework.security.web.context.HttpSessionSecurityContextRepository.SPRING_SECURITY_CONTEXT_KEY;
    
    @Controller
    
    public class LoginController {
    
        /**
         * 注入身份认证管理器
         */
        @Autowired
        private AuthenticationManager authenticationManager;
    
        @GetMapping("/login")
        public String login() {
            return "login";
        }
    
        @PostMapping(value = "/verify")
        public String login(@RequestParam("username") String username,
                @RequestParam("password") String password,
                @RequestParam("verifyCode") String verifyCode,
                HttpSession session) {
            System.out.println("username is:" + username);
            System.out.println("password is:" + password);
            System.out.println("verifyCode is:" + verifyCode);
            if (StringUtils.isEmpty(verifyCode)) {
                session.setAttribute("errorMsg", "The verification code cannot be empty");
                return "login";
            }
            if (StringUtils.isEmpty(username) || StringUtils.isEmpty(password)) {
                session.setAttribute("errorMsg", "User name or password cannot be empty");
                return "login";
            }
            String kaptchaCode = session.getAttribute("verifyCode") + "";
            System.out.println("kaptchaCode is:" + kaptchaCode);
            if (StringUtils.isEmpty(kaptchaCode) || !verifyCode.equals(kaptchaCode)) {
                session.setAttribute("errorMsg", "Verification code error");
                return "login";
            }
    //        User user = userService.login(userName, password);
    
            System.out.println(username + "==" + password + "==" + verifyCode);
            // 创建用户名与密码认证对象
            UsernamePasswordAuthenticationToken token = new UsernamePasswordAuthenticationToken(username, password);
            try {
                // 调用认证方法，返回认证对象
                Authentication authenticate = authenticationManager.authenticate(token);
                // 判断是否认证成功
                if (authenticate.isAuthenticated()) {
                    // 设置用户认证成功，往Session中添加认证通过信息
                    SecurityContextHolder.getContext().setAuthentication(authenticate);
                    SecurityContext sc = SecurityContextHolder.getContext();
                    sc.setAuthentication(authenticate);
                    session.setAttribute(SPRING_SECURITY_CONTEXT_KEY, sc);
                    // 重定向到登录成功页面
                    return "redirect:/";
    
                } else {
                    session.setAttribute("errorMsg", "Login failed");
                    return "login";
                }
            } catch (Exception ex) {
                ex.printStackTrace();
            }
            return "login";
        }
    }

###  ###

kaptcha验证码

package net.codejava;
    
    import com.google.code.kaptcha.impl.DefaultKaptcha;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.stereotype.Controller;
    import org.springframework.web.bind.annotation.GetMapping;
    
    import javax.imageio.ImageIO;
    import javax.servlet.ServletOutputStream;
    import javax.servlet.http.HttpServletRequest;
    import javax.servlet.http.HttpServletResponse;
    import java.awt.image.BufferedImage;
    import java.io.ByteArrayOutputStream;
    
    @Controller
    public class KaptchaController {
    
        @Autowired
        private DefaultKaptcha captchaProducer;
    
        @GetMapping("/common/kaptcha")
        public void defaultKaptcha(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse) throws Exception {
            byte[] captchaOutputStream = null;
            ByteArrayOutputStream imgOutputStream = new ByteArrayOutputStream();
            try {
                //Produce the verification code string and save it in the session
                String verifyCode = captchaProducer.createText();
                httpServletRequest.getSession().setAttribute("verifyCode", verifyCode);
                BufferedImage challenge = captchaProducer.createImage(verifyCode);
                ImageIO.write(challenge, "jpg", imgOutputStream);
            } catch (IllegalArgumentException e) {
                httpServletResponse.sendError(HttpServletResponse.SC_NOT_FOUND);
                return;
            }
            captchaOutputStream = imgOutputStream.toByteArray();
            httpServletResponse.setHeader("Cache-Control", "no-store");
            httpServletResponse.setHeader("Pragma", "no-cache");
            httpServletResponse.setDateHeader("Expires", 0);
            httpServletResponse.setContentType("image/jpeg");
            ServletOutputStream responseOutputStream = httpServletResponse.getOutputStream();
            responseOutputStream.write(captchaOutputStream);
            responseOutputStream.flush();
            responseOutputStream.close();
        }
    
    }

package net.codejava;
    
    import com.google.code.kaptcha.impl.DefaultKaptcha;
    import com.google.code.kaptcha.util.Config;
    import org.springframework.context.annotation.Bean;
    import org.springframework.stereotype.Component;
    
    import java.util.Properties;
    
    @Component
    public class KaptchaConfig {
    
        @Bean
        public DefaultKaptcha getDefaultKaptcha() {
            DefaultKaptcha defaultKaptcha = new DefaultKaptcha();
            Properties properties = new Properties();
            properties.put("kaptcha.border", "no");
            properties.put("kaptcha.textproducer.font.color", "black");
            properties.put("kaptcha.image.width", "150");
            properties.put("kaptcha.image.height", "40");
            properties.put("kaptcha.textproducer.font.size", "30");
            properties.put("kaptcha.session.key", "verifyCode");
            properties.put("kaptcha.textproducer.char.space", "5");
            Config config = new Config(properties);
            defaultKaptcha.setConfig(config);
    
            return defaultKaptcha;
        }
    
    }

### 6.登录页面 ###

<!DOCTYPE html>
    <html xmlns:th="http://www.thymeleaf.org">
        <head>
            <meta charset="UTF-8">
            <meta http-equiv="X-UA-Compatible" content="IE=edge">
            <meta name="viewport" content="width=device-width, initial-scale=1.0">
            <title>Bootstrap 5 Sign In Form with Image Example</title>
            <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.0.2/dist/css/bootstrap.min.css" rel="stylesheet"
                  integrity="sha384-EVSTQN3/azprG1Anm3QDgpJLIm9Nao0Yz1ztcQTwFspd3yD65VohhpuuCOmLASjC" crossorigin="anonymous">
            <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.0.2/dist/js/bootstrap.bundle.min.js"
                    integrity="sha384-MrcW6ZMFYlzcLA8Nl+NtUVF0sA7MsXsP1UyJoMp4YLEuNSfAP+JcXn/tWtIaxVXM"
            crossorigin="anonymous"></script>
            <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bootstrap-icons@1.5.0/font/bootstrap-icons.css">
        </head>
    
        <body>
            <form th:action="@{/verify}" method="post">
                <div class="container-fluid vh-100" style="margin-top:50px">
                    <div class="" style="margin-top:50px">
                        <div class="rounded d-flex justify-content-center">
                            <div class=" col-md-4 col-sm-12 shadow-lg p-5 bg-light">
                                <div class="text-center">
                                    <h3 class="text-primary">请登录</h3>
                                </div>
                                <div class="p-4">
                                    <div class="input-group mb-3">
                                        <span class="input-group-text bg-secondary"><i
                                                class="bi bi-person-fill text-white"></i></span>
                                        <input id="username" type="text" name="username" required class="form-control" placeholder="用户名">
                                    </div>
                                    <div class="input-group mb-3">
                                        <span class="input-group-text bg-secondary"><i
                                                class="bi bi-key-fill text-white"></i></span>
                                        <input  id="password" type="password" name="password" required class="form-control" placeholder="密码">
                                    </div>
                                    <div class="input-group mb-3">
                                        <span class="input-group-text bg-secondary"><i
                                                class="bi bi-lock-fill text-white"></i></span>
                                        <input type="text" name="verifyCode"  class="form-control" placeholder="输入下图中的校验码">
                                    </div>
                                    <div class="input-group mb-3">
                                        <span class="input-group-text bg-secondary"><i
                                                class="bi bi-image-fill text-white"></i></span>
                                        <img alt="Click the picture to refresh!" class="pointer" th:src="@{/common/kaptcha}"
                                             onclick="this.src = '/common/kaptcha?d=' + new Date() * 1">
                                    </div>
                                    <div class="col-12">
                                        <button type="submit" class="btn btn-primary px-4 float-end mt-4">登录</button>
                                    </div>
    
                                </div>
                            </div>
                        </div>
                    </div>
                </div>
        </body>
    
    </html>

### **5. 测试登录和注销** ###

启动Spring Boot应用程序并访问 http://localhost:8080 在Web浏览器中，您将看到自定义的登录页面出现：

![74d9c55b07d845dc8916c07636499a6f.png][]

现在输入正确的用户名admin和密码admin，您将看到主页如下：

![1a1e61bb79504dd4b3030951d3888e3e.png][]

并注意欢迎消息后跟用户名。用户现在已通过身份验证以使用该应用程序。单击“注销”按钮，您将看到自定义的登录页面出现，这意味着我们已成功实现登录并注销到我们的Spring Boot应用程序。

#### **结论：** ####

到目前为止，您已经学会了使用基于表单的身份验证和数据库内凭据来保护Spring Boot应用程序。您会看到 Spring 安全性使实现登录和注销功能变得非常容易，并且非常方便。为方便起见，您可以下载下面的示例项目。

下载源码：[https://github.com/allwaysoft/ProductManagerJDBCAuthenticationManuallyAuthenticateCaptcha/][https_github.com_allwaysoft_ProductManagerJDBCAuthenticationManuallyAuthenticateCaptcha]

[Link 1]: https://codejava.net/frameworks/spring-boot/spring-boot-crud-example-with-spring-mvc-spring-data-jpa-thymeleaf-hibernate-mysql
[dc16805f4da24a84ae935e44f04f5f84.png]: https://img-blog.csdnimg.cn/dc16805f4da24a84ae935e44f04f5f84.png
[74d9c55b07d845dc8916c07636499a6f.png]: https://img-blog.csdnimg.cn/74d9c55b07d845dc8916c07636499a6f.png
[1a1e61bb79504dd4b3030951d3888e3e.png]: https://img-blog.csdnimg.cn/1a1e61bb79504dd4b3030951d3888e3e.png
[https_github.com_allwaysoft_ProductManagerJDBCAuthenticationManuallyAuthenticateCaptcha]: https://github.com/allwaysoft/ProductManagerJDBCAuthenticationManuallyAuthenticateCaptcha/