配置Mysql与注册登录模块 1

backend/pom.xml

@@ -16,7 +16,59 @@
     <properties>
         <java.version>1.8</java.version>
     </properties>
+
+    <!-- dependencies 里面存放依赖-->
     <dependencies>
+        <!-- JDBC 依赖,用于操作连接数据库-->
+        <!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-jdbc -->
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-jdbc</artifactId>
+            <version>3.0.2</version>
+        </dependency>
+
+        <!-- 简化代码,可以帮助写一些构造函数, set() , get() 函数等-->
+        <!-- https://mvnrepository.com/artifact/org.projectlombok/lombok -->
+        <dependency>
+            <groupId>org.projectlombok</groupId>
+            <artifactId>lombok</artifactId>
+            <version>1.18.26</version>
+            <scope>provided</scope>
+        </dependency>
+
+        <!-- mysql 连接驱动-->
+        <!-- https://mvnrepository.com/artifact/com.mysql/mysql-connector-j -->
+        <dependency>
+            <groupId>com.mysql</groupId>
+            <artifactId>mysql-connector-j</artifactId>
+            <version>8.0.32</version>
+        </dependency>
+
+        <!-- mybatis-plus 用于低代码开发-->
+        <!-- https://mvnrepository.com/artifact/com.baomidou/mybatis-plus-boot-starter -->
+        <dependency>
+            <groupId>com.baomidou</groupId>
+            <artifactId>mybatis-plus-boot-starter</artifactId>
+            <version>3.5.3.1</version>
+        </dependency>
+
+        <!-- mybatis-plus-generator 用于自动生成一些函数-->
+        <!-- https://mvnrepository.com/artifact/com.baomidou/mybatis-plus-generator -->
+        <dependency>
+            <groupId>com.baomidou</groupId>
+            <artifactId>mybatis-plus-generator</artifactId>
+            <version>3.5.3.1</version>
+        </dependency>
+
+<!--        用于安全验证-->
+        <!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-security -->
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-security</artifactId>
+            <version>3.0.2</version>
+        </dependency>
+
+
         <dependency>
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-thymeleaf</artifactId>

backend/src/main/java/com/kob/backend/config/SecurityConfig.java

@@ -0,0 +1,17 @@
+package com.kob.backend.config;
+
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
+import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
+import org.springframework.security.crypto.password.PasswordEncoder;
+//明文加密
+@Configuration
+@EnableWebSecurity
+public class SecurityConfig {
+
+    @Bean
+    public PasswordEncoder passwordEncoder() {
+        return new BCryptPasswordEncoder();
+    }
+}

backend/src/main/java/com/kob/backend/controller/user/UserController.java

@@ -0,0 +1,71 @@
+package com.kob.backend.controller.user;
+
+import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
+import com.kob.backend.mapper.UserMapper;
+import com.kob.backend.pojo.User;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
+import org.springframework.security.crypto.password.PasswordEncoder;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.RestController;
+
+import java.util.List;
+
+//实现对用户类 User 的增删查操作
+@RestController
+public class UserController {
+
+//    用到数据库里的 Mapper 时,需要加 @Autowired 注解
+    @Autowired
+    UserMapper userMapper;
+
+//    返回所有用户
+    @GetMapping("/user/all")
+    public List<User> getAll() {
+//      null 表示查询所有的
+        return userMapper.selectList(null);
+    }
+
+/*
+    @GetMapping("/user/{userId}/")
+    public User getUser(@PathVariable int userId) {
+//        查询某个用户
+//        return userMapper.selectById(userId);
+
+//        封装查询语句:查询某个 id 的用户
+        QueryWrapper<User> queryWrapper = new QueryWrapper<>();
+        queryWrapper.eq("id", userId);
+        return userMapper.selectOne(queryWrapper);
+    }
+*/
+
+    @GetMapping("/user/{userId}")
+    public List<User> getUser(@PathVariable int userId) {
+//        封装查询语句:查询某个范围 id 的用户: ge 是大于等于, gt 是大于, le 是小于等于, lt 是小于
+        QueryWrapper<User> queryWrapper1 = new QueryWrapper<>();
+        queryWrapper1.ge("id", 2).le("id", 4);
+        return userMapper.selectList(queryWrapper1);
+    }
+
+    @GetMapping("/user/add/{userId}/{username}/{password}")
+    public String addUser(@PathVariable int userId,
+                          @PathVariable String username,
+                          @PathVariable String password) {
+        if(password.length() < 6){
+            return "密码少于6位,请重设密码";
+        }
+//        加密明文密码并存入密文到数据库
+        PasswordEncoder passwordEncoder = new BCryptPasswordEncoder();
+        String encodedPassword = passwordEncoder.encode(password);
+        User user = new User(userId, username, encodedPassword);
+        userMapper.insert(user);
+        return "Add User Successfully";
+    }
+
+    @GetMapping("/user/delete/{userId}")
+    public String deleteUser(@PathVariable int userId){
+        userMapper.deleteById(userId);
+        return "Delete User Successfully";
+    }
+}

backend/src/main/java/com/kob/backend/mapper/UserMapper.java

@@ -0,0 +1,11 @@
+//用于将 class 的操作转化成 sql 语句
+package com.kob.backend.mapper;
+
+import com.baomidou.mybatisplus.core.mapper.BaseMapper;
+import com.kob.backend.pojo.User;
+import org.apache.ibatis.annotations.Mapper;
+
+@Mapper
+public interface UserMapper extends BaseMapper<User> {
+
+}

backend/src/main/java/com/kob/backend/pojo/User.java

@@ -0,0 +1,23 @@
+//用于将 mysql 表 User 转换为 class
+package com.kob.backend.pojo;
+
+/*
+Data 用于编译时自动生成 getter setter 方法;
+NoArgsConstructor 用于生成无参构造函数;
+AllArgsConstructor 用于生成所有参数构造函数.
+*/
+import lombok.AllArgsConstructor;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+@Data
+@NoArgsConstructor
+@AllArgsConstructor
+public class User {
+
+    // 使用对象类型定义而不是 Int 防止 Mybatis 报错
+    private Integer id;
+    private String username;
+    private String password;
+
+}

backend/src/main/java/com/kob/backend/service/impl/UserDetailsServiceImpl.java

@@ -0,0 +1,29 @@
+package com.kob.backend.service.impl;
+
+import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
+import com.kob.backend.mapper.UserMapper;
+import com.kob.backend.pojo.User;
+import com.kob.backend.service.impl.utils.UserDetailsImpl;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.security.core.userdetails.UserDetails;
+import org.springframework.security.core.userdetails.UserDetailsService;
+import org.springframework.security.core.userdetails.UsernameNotFoundException;
+import org.springframework.stereotype.Service;
+
+//自定义 Spring-Starter-Security 登录信息; @Autowired 需要在外层加入 @Service 注解
+@Service
+public class UserDetailsServiceImpl implements UserDetailsService {
+
+    @Autowired
+    private UserMapper userMapper;
+    @Override
+    public UserDetails loadUserByUsername(String username) throws UsernameNotFoundException {
+        QueryWrapper<User> queryWrapper = new QueryWrapper<>();
+        queryWrapper.eq("username",username);
+        User user = userMapper.selectOne(queryWrapper);
+        if(user == null){
+            throw new RuntimeException("用户不存在");
+        }
+        return new UserDetailsImpl(user);
+    }
+}

backend/src/main/java/com/kob/backend/service/impl/utils/UserDetailsImpl.java

@@ -0,0 +1,61 @@
+package com.kob.backend.service.impl.utils;
+
+import com.kob.backend.pojo.User;
+import lombok.AllArgsConstructor;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+import org.springframework.security.core.GrantedAuthority;
+import org.springframework.security.core.userdetails.UserDetails;
+
+import java.util.Collection;
+
+//实现 UserDetails 接口:需要加上 lombok 的注解,来自动生成构造函数
+@Data
+@AllArgsConstructor
+@NoArgsConstructor
+public class UserDetailsImpl implements UserDetails {
+
+//    定义一个 pojo 的 User 类对象
+    private User user;
+
+    @Override
+    public Collection<? extends GrantedAuthority> getAuthorities() {
+        return null;
+    }
+
+//    获取 pojo -> User 类对象 user 的用户密码
+    @Override
+    public String getPassword() {
+        return user.getPassword();
+    }
+
+//    获取 pojo -> User 类对象 user 的用户名
+    @Override
+    public String getUsername() {
+        return user.getUsername();
+    }
+
+//    用户账号是否没有过期
+    @Override
+    public boolean isAccountNonExpired() {
+        return true;
+    }
+
+//    用户是否没有被锁定
+    @Override
+    public boolean isAccountNonLocked() {
+        return true;
+    }
+
+//    用户授权是否没有过期
+    @Override
+    public boolean isCredentialsNonExpired() {
+        return true;
+    }
+
+//    用户是否被启用
+    @Override
+    public boolean isEnabled() {
+        return true;
+    }
+}

backend/src/main/resources/application.properties

@@ -1,2 +1,8 @@
-#??????
+#default server port
 server.port=3000
+
+#mysql database connect profile
+spring.datasource.username=root
+spring.datasource.password=mysqlPassword
+spring.datasource.url=jdbc:mysql://localhost:3306/kob?serverTimezone=Asia/Shanghai&useUnicode=true&characterEncoding=utf-8
+spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver

backend/src/test/java/com/kob/backend/BackendApplicationTests.java

@@ -2,12 +2,17 @@ package com.kob.backend;
 
 import org.junit.jupiter.api.Test;
 import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
+import org.springframework.security.crypto.password.PasswordEncoder;
 
 @SpringBootTest
 class BackendApplicationTests {
 
+//    测试明文加密
     @Test
     void contextLoads() {
+        PasswordEncoder passwordEncoder = new BCryptPasswordEncoder();
+        System.out.println(passwordEncoder.encode("123"));
     }
 
 }