Bagaimana untuk melaksanakan log masuk tunggal SpringBoot

1. Langkah pelaksanaan khusus

Tambah pemintas, tetapkan UUID sebagai pengecam unik dan simpannya dalam pangkalan data

Pertanyaan melalui akaun log masuk semasa

Jika pada masa ini Jika nilai UUID yang disimpan dalam sesi pengguna adalah sama dengan nilai UUID dalam pangkalan data kami, berikan

sebaliknya kembali palsu, menunjukkan bahawa pengguna telah log masuk pada peranti atau penyemak imbas lain

2. Paparan kod

Mula-mula kami mencipta projek Spring baharu

Tambah kebergantungan berikut

fail konfigurasi yml

pelayan:
port: 8080
spring:
sumber data:
nama kelas pemandu: com.mysql.cj.jdbc.Driver
url: jdbc:mysql ://127.0.0.1:3306 /userdb?characterEncoding=utf-8&&severTimezone=utc
nama pengguna: root
kata laluan: root
thymeleaf:
mod: HTML5
cache: false
akhiran: .html
awalan : classpath:/templates/
mybatis:
Mapper-locations: classpath:/mapper/*.xml #Introduce mapper file
type-aliases-package: com.bdqn .springsso.pojo #Perkenalkan jenis alias

fail konfigurasi pom.xml

<?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>

Kod belakang

Buat pakej berikut dalam direktori java, dan cipta pemeta pakej dalam sumber

Mula-mula tulis kelas entiti lapisan pojo Pengguna

Nota: Apabila mencipta jadual dalam MySQL, jenis data uuid ialah varchar dan panjang mestilah lebih besar, jika tidak ia akan berjalan Laporkan ralat

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;
}

Kemudian tulis antara muka UserMapper lapisan pemeta

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);
}

Kemudian tulis lapisan perkhidmatan UserService dan 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);
    }
}

Kemudian tulis lapisan pemintas UserInterceptor pemintas

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;
        }
    }
}

Kemudian lapisan pengawal 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";
    }
}

Kemudian penulisan lapisan konfigurasi 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");
    }
}

Yang terakhir ialah penulisan 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>

Kod bahagian hadapan

log masuk.html

<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
  <meta charset="UTF-8">
  <title>Login Module</title>
</head>
<body>
<h2 >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>登录成功</h2>
<a th:href="@{/test}" rel="external nofollow" >测试</a>
</body>
</html>

Paparan kesan

Mula-mula kami menggunakan pelayar Firefox untuk beroperasi

Masukkan http:// localhost:8080/Masukkan halaman log masuk

Klik untuk log masuk

Klik untuk menguji

Kemudian kami kembali ke halaman kejayaan log masuk

Gunakan Google Chrome untuk memasukkan http://localhost:8080/ ke log masuk

Selepas log masuk, masukkan halaman kejayaan log masuk

Pada masa ini kita kembali ke pelayar Firefox

Klik hiperpautan ujian untuk mendapati halaman tersebut melompat ke halaman log masuk

Menandakan ujian log masuk tunggal berjaya

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