mysql和SpringBoot结合

backend/pom.xml

@@ -17,6 +17,45 @@
         <java.version>1.8</java.version>
     </properties>
     <dependencies>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-jdbc</artifactId>
+            <version>2.7.1</version>
+        </dependency>
+
+        <dependency>
+            <groupId>org.projectlombok</groupId>
+            <artifactId>lombok</artifactId>
+            <version>1.18.24</version>
+            <scope>provided</scope>
+        </dependency>
+
+        <dependency>
+            <groupId>mysql</groupId>
+            <artifactId>mysql-connector-java</artifactId>
+            <version>8.0.29</version>
+        </dependency>
+
+        <dependency>
+            <groupId>com.baomidou</groupId>
+            <artifactId>mybatis-plus-boot-starter</artifactId>
+            <version>3.5.2</version>
+        </dependency>
+
+        <dependency>
+            <groupId>com.baomidou</groupId>
+            <artifactId>mybatis-plus-generator</artifactId>
+            <version>3.5.3</version>
+        </dependency>
+
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-security</artifactId>
+            <version>2.7.1</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 +1,20 @@
+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;
+
+/**
+ * @author new
+ */
+@Configuration
+@EnableWebSecurity
+public class SecurityConfig {
+
+    @Bean
+    public PasswordEncoder passwordEncoder() {
+        return new BCryptPasswordEncoder();
+    }
+}

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

@@ -0,0 +1,20 @@
+package com.kob.backend.controller.pojo;
+
+import lombok.AllArgsConstructor;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+/**
+ * @author new
+ */
+
+@Data
+@NoArgsConstructor
+@AllArgsConstructor
+
+public class User {
+    // 相当于User表中的一行数据
+    private Integer id;
+    private String username;
+    private String password;
+}

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

@@ -0,0 +1,35 @@
+package com.kob.backend.controller.service.impl;
+
+import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
+import com.kob.backend.controller.pojo.User;
+import com.kob.backend.controller.service.impl.utils.UserDetailsImpl;
+import com.kob.backend.mapper.UserMapper;
+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;
+
+/**
+ * @author new
+ */
+@Service
+public class UserDetailsServiceImpl implements UserDetailsService {
+
+    @Autowired
+    private UserMapper userMapper;
+
+    // 传入username，返回对应的username和password
+    @Override
+    public UserDetails loadUserByUsername(String username) throws UsernameNotFoundException {
+        QueryWrapper<User> qw = new QueryWrapper<>();
+        qw.eq("username",username);
+        User user = userMapper.selectOne(qw);
+        if (user == null) {
+            throw new RuntimeException("用户不存在!");
+        }
+
+
+        return new UserDetailsImpl(user);
+    }
+}

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

@@ -0,0 +1,56 @@
+package com.kob.backend.controller.service.impl.utils;
+
+import com.kob.backend.controller.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 org.springframework.security.core.userdetails.UserDetailsService;
+
+import java.util.Collection;
+
+/**
+ * @author new
+ */
+
+@Data
+@NoArgsConstructor
+@AllArgsConstructor
+public class UserDetailsImpl implements UserDetails {
+    private User user;
+    @Override
+    public Collection<? extends GrantedAuthority> getAuthorities() {
+        return null;
+    }
+
+    @Override
+    public String getPassword() {
+        return user.getPassword();
+    }
+
+    @Override
+    public String getUsername() {
+        return user.getUsername();
+    }
+
+    @Override
+    public boolean isAccountNonExpired() {
+        return true;
+    }
+
+    @Override
+    public boolean isAccountNonLocked() {
+        return true;
+    }
+
+    @Override
+    public boolean isCredentialsNonExpired() {
+        return true;
+    }
+
+    @Override
+    public boolean isEnabled() {
+        return true;
+    }
+}

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

@@ -0,0 +1,73 @@
+package com.kob.backend.controller.user;
+
+import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
+import com.kob.backend.controller.pojo.User;
+import com.kob.backend.mapper.UserMapper;
+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.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+import java.util.List;
+
+/**
+ * @author new
+ */
+
+@RestController
+public class UserController {
+
+    @Autowired
+    UserMapper userMapper;
+
+    // 返回user表的所有数据
+    @GetMapping("/user/all/")
+    public List<User> getAll() {
+
+        return userMapper.selectList(null);
+    }
+
+    // 返回指定id的用户信息
+    @GetMapping("/user/{userId}/")
+    public User getUser(@PathVariable int userId) {
+
+        QueryWrapper<User> qw = new QueryWrapper<>();
+        // 返回指定id的用户信息
+        // return userMapper.selectById(userId);
+
+        // 等价于上面的查询语句
+        qw.eq("id",userId);
+
+        // 返回编号大于等于2小于等于3的所有用户信息
+//        qw.ge("id",2).le("id",3);
+        return userMapper.selectOne(qw);
+    }
+
+    // 添加用户
+    @GetMapping("/user/add/{userid}/{username}/{password}/")
+    public String addUser(@PathVariable int userid,
+                          @PathVariable String username,
+                          @PathVariable String password) {
+        // 存入数据库直接存入的是密文，不存明文密码
+        PasswordEncoder passwordEncoder = new BCryptPasswordEncoder();
+        String encodedPassword = passwordEncoder.encode(password);
+        User user = new User(userid,username,encodedPassword);
+        userMapper.insert(user);
+        return "Add User Successfully!";
+
+    }
+
+    // 删除用户
+
+    @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 +1,13 @@
+package com.kob.backend.mapper;
+
+import com.baomidou.mybatisplus.core.mapper.BaseMapper;
+import com.kob.backend.controller.pojo.User;
+import org.apache.ibatis.annotations.Mapper;
+
+
+/**
+ * @author new
+ */
+@Mapper
+public interface UserMapper extends BaseMapper<User> {
+}

backend/src/main/resources/application.properties

@@ -1 +1,5 @@
 server.port=3000
+spring.datasource.username=root
+spring.datasource.password=zfp251217
+spring.datasource.url=jdbc:mysql://101.33.213.197:3307/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 +2,31 @@ 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 {
 
     @Test
     void contextLoads() {
+        PasswordEncoder passwordEncoder = new BCryptPasswordEncoder();
+//        // 编码后的值不同
+//        String str1 = passwordEncoder.encode("zfp");
+//        String str2 = passwordEncoder.encode("zfp");
+//        System.out.println(str1);
+//        System.out.println(str2);
+//        // 但是匹配的结果正确
+//        System.out.println(passwordEncoder.matches("zfp",str1));
+//        System.out.println(passwordEncoder.matches("zfp",str2));
+//        // 匹配失败
+//        System.out.println(passwordEncoder.matches("zfp1",str2));
+        // 将数据库中的明文密码编码为密文
+        // user1,user2,user3
+        System.out.println(passwordEncoder.encode("123456"));
+        System.out.println(passwordEncoder.encode("test"));
+        System.out.println(passwordEncoder.encode("root"));
+
     }
 
 }