1. Specific implementation steps
Add an interceptor, set UUID as a unique identifier, and store it in the database
Query through the account of the current login
If the current If the UUID value stored in the user's session is the same as the UUID value in our database, pass
Otherwise, return false, indicating that the user has logged in on another device or browser
2. Code display
First we create a new Spring project
Add the following dependencies
yml configuration file
server:
port: 8080
spring:
datasource:
driver-class-name: com.mysql.cj.jdbc.Driver
url: jdbc:mysql://127.0.0.1:3306 /userdb?characterEncoding=utf-8&&severTimezone=utc
username: root
password: root
thymeleaf:
mode: HTML5
cache: false
suffix: .html
prefix : classpath:/templates/
mybatis:
Mapper-locations: classpath:/mapper/*.xml #Introduce mapper files
type-aliases-package: com.bdqn.springsso.pojo #Introduce type aliases
pom.xml configuration file
<?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 https://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>2.7.5</version> <relativePath/> <!-- lookup parent from repository --> </parent> <groupId>com.bdqn</groupId> <artifactId>springsso</artifactId> <version>0.0.1-SNAPSHOT</version> <name>springsso</name> <description>Demo project for Spring Boot</description> <properties> <java.version>1.8</java.version> </properties> <dependencies> <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.mybatis.spring.boot</groupId> <artifactId>mybatis-spring-boot-starter</artifactId> <version>2.2.2</version> </dependency> <dependency> <groupId>com.mysql</groupId> <artifactId>mysql-connector-j</artifactId> <scope>runtime</scope> </dependency> <dependency> <groupId>org.projectlombok</groupId> <artifactId>lombok</artifactId> <optional>true</optional> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> <configuration> <excludes> <exclude> <groupId>org.projectlombok</groupId> <artifactId>lombok</artifactId> </exclude> </excludes> </configuration> </plugin> </plugins> </build> </project>
Backend code
Create the following packages in the java directory, and create the mapper package in resources
First write the pojo layer entity class User
Note: When creating a table in MySQL, the data type of uuid is varchar, and the length must be larger, otherwise it will run Report an error
package com.bdqn.springsso.pojo; import lombok.Data; @Data public class User { //用户id private Integer id; //账户 private String username; //密码 private String password; //uuid private String uuid; }
Then write the mapper layer UserMapper interface
package com.bdqn.springsso.mapper; import com.bdqn.springsso.pojo.User; import org.apache.ibatis.annotations.Mapper; import org.apache.ibatis.annotations.Param; @Mapper public interface UserMapper { //根据姓名和密码查询 User chekLogin(@Param("username") String username, @Param("password") String password); //根据姓名修改uuid void update(@Param("uuid") String uuid,@Param("username") String username); //根据姓名查询uuid String getUUID(@Param("username") String username); }
Then write the service layer UserService and UserServiceImpl
package com.bdqn.springsso.service; import com.bdqn.springsso.pojo.User; public interface UserService { //根据姓名和密码查询 User chekLogin(String username, String password); //根据姓名修改uuid void update(String uuid,String username); }
package com.bdqn.springsso.service; import com.bdqn.springsso.mapper.UserMapper; import com.bdqn.springsso.pojo.User; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Service; @Service public class UserServiceImpl implements UserService { @Autowired private UserMapper userMapper; @Override public User chekLogin(String username, String password) { return userMapper.chekLogin(username,password); } @Override public void update(String uuid,String username) { userMapper.update(uuid,username); } }
Then write the interceptor layer UserInterceptor interceptor
package com.bdqn.springsso.interceptor; import com.bdqn.springsso.mapper.UserMapper; import org.springframework.web.servlet.HandlerInterceptor; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import javax.servlet.http.HttpSession; public class UserInterceptor implements HandlerInterceptor { private UserMapper userMapper; public UserInterceptor(UserMapper userMapper){ this.userMapper=userMapper; } @Override public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception { HttpSession session = request.getSession(); String username = (String) session.getAttribute("username"); //数据库 String UUID=userMapper.getUUID(username); //session String uuid = (String)session.getAttribute("uuid"); System.out.println("uuid = " + uuid); System.out.println("UUID = " + UUID); if(UUID.equals(uuid)){ return true; }else { System.out.println("拦截"+request.getRequestURI()); response.sendRedirect("/login"); response.setStatus(401); return false; } } }
Then the controller layer UserController
package com.bdqn.springsso.controller; import com.bdqn.springsso.pojo.User; import com.bdqn.springsso.service.UserService; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.CrossOrigin; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.ResponseBody; import javax.servlet.http.HttpSession; import java.util.UUID; @Controller @CrossOrigin public class UserController { @Autowired private UserService userService; //登录 @RequestMapping("/") public String goLogin(){ return "login"; } //登录验证 @RequestMapping("/login") public String chekLogin(String username, String password, HttpSession session){ User user=userService.chekLogin(username,password); if (user==null){ return "login"; }else { session.setAttribute("username",username); String uuid= UUID.randomUUID().toString().replace("-", ""); System.out.println("uuid = " + uuid); userService.update(uuid,username); session.setAttribute("uuid",uuid); return "index"; } } //测试 @RequestMapping("/test") @ResponseBody public String test(){ return "成功"; } }
Then the writing of the config layer MvcConfig
package com.bdqn.springsso.config; import com.bdqn.springsso.interceptor.UserInterceptor; import com.bdqn.springsso.mapper.UserMapper; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.context.annotation.Configuration; import org.springframework.web.servlet.config.annotation.InterceptorRegistry; import org.springframework.web.servlet.config.annotation.WebMvcConfigurer; @Configuration public class MvcConfig implements WebMvcConfigurer { @Autowired private UserMapper userMapper; @Override public void addInterceptors(InterceptorRegistry registry) { //添加拦截器,排除/路径和 /login路径 registry.addInterceptor(new UserInterceptor(userMapper)) .excludePathPatterns("/","/login"); } }
The last is the writing of userMapper.xml
<?xml version="1.0" encoding="UTF-8" ?> <!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd"> <mapper namespace="com.bdqn.springsso.mapper.UserMapper"> <update id="update"> update user set uuid=#{uuid} where username=#{username} </update> <select id="chekLogin" resultType="com.bdqn.springsso.pojo.User"> select * from user where username=#{username} and password=#{password} </select> <select id="getUUID" resultType="java.lang.String"> select uuid from user where username=#{username} </select> </mapper>
The front-end code
login.html
<!DOCTYPE html> <html lang="en" xmlns:th="http://www.thymeleaf.org"> <head> <meta charset="UTF-8"> <title>Login Module</title> </head> <body> <h2 id="欢迎来到登录页面">欢迎来到登录页面</h2> <form th:action="@{/login}" method="post"> 用户:<input type="text" name="username"><br> 密码:<input type="password" name="password"><br> <button type="submit">登录</button> </form> </body> </html>
index.html
<!DOCTYPE html> <html lang="en" xmlns:th="http://www.thymeleaf.org"> <head> <meta charset="UTF-8"> <title>Title</title> </head> <body> <h2 id="登录成功">登录成功</h2> <a th:href="@{/test}" rel="external nofollow" >测试</a> </body> </html>
Effect display
First we use Firefox browser to operate
Enter http:// localhost:8080/Enter the login page
The above is the detailed content of How to implement SpringBoot single sign-on. For more information, please follow other related articles on the PHP Chinese website!

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