SpringBoot 整合持久层
- SpringBoot 整合 Mybatis 流程
- 一、添加依赖
- 1. pom.xml
- 二、写配置文件
- 1. application.yml
- 三、写 Java 文件
- 1. entity
- 2. dao
- 3. service
- 4. controller
- 5. mapper
- 四、建立数据库
- 五、测试
- SpringBoot 整合 Mybatis-Plus 流程
- 一、添加依赖
- 1. pom.xml
- 二、写配置文件
- 1. application.yml
- 三、写 Java 文件
- 1. entity
- 2. dao
- 3. service
- 4. controller
- 5. mapper (resources/mapper/UserMapper.xml)
- 四、建立数据库
- 五、测试
SpringBoot 整合 Mybatis 流程
一、添加依赖
1. 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.wang</groupId>
<artifactId>SpringBoot-Template</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>SpringBoot-Template</name>
<description>SpringBoot-Template</description>
<properties>
<java.version>19</java.version>
</properties>
<dependencies>
<!--springBoot 依赖-->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<scope>runtime</scope>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<!--数据操作相关依赖-->
<dependency>
<groupId>com.mysql</groupId>
<artifactId>mysql-connector-j</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
<version>2.2.0</version>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<optional>true</optional>
</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>
二、写配置文件
1. application.yml
# 配置数据源
spring:
datasource:
driver-class-name: com.mysql.cj.jdbc.Driver
url: jdbc:mysql://localhost:3306/ssmbuild?useSSL=true&useUnicode=true&characterEncoding=utf8
username: root
password: root
# 配置 mybatis
mybatis:
mapper-locations: classpath:mapper/*.xml
三、写 Java 文件
1. entity
package com.wang.entity;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
import lombok.ToString;
/**
* @author 愿青春不负梦想
* @Description: TODO
* @email 3062827964@qq.com
* @date 2023-01-22 22:43
*/
@Data
@AllArgsConstructor
@NoArgsConstructor
@ToString
public class User {
private int id;
private String username;
private String password;
}
2. dao
package com.wang.dao;
import com.wang.entity.User;
import org.apache.ibatis.annotations.Mapper;
import org.springframework.stereotype.Repository;
import org.springframework.web.bind.annotation.Mapping;
import java.util.List;
/**
* @author 愿青春不负梦想
* @Description: TODO
* @email 3062827964@qq.com
* @date 2023-01-22 23:07
*/
@Mapper
@Repository
public interface UserDao {
List<User> queryAllUser();
}
3. service
UserService.java
package com.wang.service;
import com.wang.entity.User;
import java.util.List;
/**
* @author 愿青春不负梦想
* @Description: TODO
* @email 3062827964@qq.com
* @date 2023-01-22 23:04
*/
public interface UserService {
List<User> queryAllUser();
}
UserServiceImpl.java
package com.wang.service.impl;
import com.wang.dao.UserDao;
import com.wang.entity.User;
import com.wang.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.util.List;
/**
* @author 愿青春不负梦想
* @Description: TODO
* @email 3062827964@qq.com
* @date 2023-01-22 23:05
*/
@Service
public class UserServiceImpl implements UserService {
@Autowired
private UserDao userDao;
@Override
public List<User> queryAllUser() {
return userDao.queryAllUser();
}
}
4. controller
package com.wang.controller;
import com.wang.entity.User;
import com.wang.service.impl.UserServiceImpl;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import java.util.List;
/**
* @author 愿青春不负梦想
* @Description: TODO
* @email 3062827964@qq.com
* @date 2023-01-22 23:24
*/
@RestController
@RequestMapping("user")
public class UserController {
@Autowired
private UserServiceImpl userService;
@GetMapping("all")
public List<User> getAllUser(){
return userService.queryAllUser();
}
}
5. mapper
<?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.wang.dao.UserDao">
<!--查询所有用户-->
<select id="queryAllUser" resultType="com.wang.entity.User">
select * from user
</select>
</mapper>
四、建立数据库
ssmbuild.sql
/*
Navicat Premium Data Transfer
Source Server : phpstudy
Source Server Type : MySQL
Source Server Version : 50726
Source Host : localhost:3306
Source Schema : ssmbuild
Target Server Type : MySQL
Target Server Version : 50726
File Encoding : 65001
Date: 23/01/2023 00:01:16
*/
SET NAMES utf8mb4;
SET FOREIGN_KEY_CHECKS = 0;
-- ----------------------------
-- Table structure for user
-- ----------------------------
DROP TABLE IF EXISTS `user`;
CREATE TABLE `user` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`username` varchar(40) CHARACTER SET utf8 COLLATE utf8_unicode_ci NULL DEFAULT NULL,
`password` varchar(40) CHARACTER SET utf8 COLLATE utf8_unicode_ci NULL DEFAULT NULL,
PRIMARY KEY (`id`) USING BTREE
) ENGINE = MyISAM AUTO_INCREMENT = 4 CHARACTER SET = utf8 COLLATE = utf8_unicode_ci ROW_FORMAT = Dynamic;
-- ----------------------------
-- Records of user
-- ----------------------------
INSERT INTO `user` VALUES (1, 'zhangSan', '123456');
INSERT INTO `user` VALUES (2, 'liSi', '123456');
INSERT INTO `user` VALUES (3, 'wangWu', '123456');
SET FOREIGN_KEY_CHECKS = 1;
五、测试
访问 http://localhost:8080/user/all
文件目录结构
项目地址:https://gitee.com/dream-cometrue/spring-boot-mybatis-template
SpringBoot 整合 Mybatis-Plus 流程
一、添加依赖
1. 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.wang</groupId>
<artifactId>springBoot-mybatisPlus</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>springBoot-mybatisPlus</name>
<description>springBoot-mybatisPlus</description>
<properties>
<java.version>19</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<scope>runtime</scope>
<optional>true</optional>
</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>
<dependency>
<groupId>com.baomidou</groupId>
<artifactId>mybatis-plus-boot-starter</artifactId>
<version>3.5.2</version>
</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>
二、写配置文件
1. application.yml
# 配置数据源
spring:
datasource:
driver-class-name: com.mysql.cj.jdbc.Driver
username: root
password: root
url: jdbc:mysql://localhost:3306/ssmbuild?useSSL=true&useUnicode=true&characterEncoding=utf8
#mybatis-plus
mybatis-plus:
configuration:
map-underscore-to-camel-case: true
mapper-locations: classpath:mapper/*Mapper.xml
type-aliases-package: com.wang.entity
三、写 Java 文件
1. entity
package com.wang.entity;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
import lombok.ToString;
/**
* @author 愿青春不负梦想
* @Description: TODO
* @email 3062827964@qq.com
* @date 2023-01-22 22:43
*/
@Data
@AllArgsConstructor
@NoArgsConstructor
@ToString
public class User {
private int id;
private String username;
private String password;
}
2. dao
@Mapper
public interface UserDao extends BaseMapper<User> {
}
3. service
UserService.java
@Component
public interface UserService extends IService<User> {
}
UserServiceImpl.java
@Service
public class UserServiceImpl extends ServiceImpl<UserDao, User> implements UserService {
@Autowired
private UserDao userDao;
public List<User> getAllUser(){
List<User> users = userDao.selectList(null);
return list();
}
}
4. controller
@RestController
@RequestMapping("user")
public class UserController {
@Autowired
private UserServiceImpl userService;
@GetMapping("all")
public List<User> getAll(){
return userService.getAllUser();
}
}
5. mapper (resources/mapper/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.wang.dao.UserDao">
</mapper>
四、建立数据库
ssmbuild.sql
/*
Navicat Premium Data Transfer
Source Server : phpstudy
Source Server Type : MySQL
Source Server Version : 50726
Source Host : localhost:3306
Source Schema : ssmbuild
Target Server Type : MySQL
Target Server Version : 50726
File Encoding : 65001
Date: 23/01/2023 00:01:16
*/
SET NAMES utf8mb4;
SET FOREIGN_KEY_CHECKS = 0;
-- ----------------------------
-- Table structure for user
-- ----------------------------
DROP TABLE IF EXISTS `user`;
CREATE TABLE `user` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`username` varchar(40) CHARACTER SET utf8 COLLATE utf8_unicode_ci NULL DEFAULT NULL,
`password` varchar(40) CHARACTER SET utf8 COLLATE utf8_unicode_ci NULL DEFAULT NULL,
PRIMARY KEY (`id`) USING BTREE
) ENGINE = MyISAM AUTO_INCREMENT = 4 CHARACTER SET = utf8 COLLATE = utf8_unicode_ci ROW_FORMAT = Dynamic;
-- ----------------------------
-- Records of user
-- ----------------------------
INSERT INTO `user` VALUES (1, 'zhangSan', '123456');
INSERT INTO `user` VALUES (2, 'liSi', '123456');
INSERT INTO `user` VALUES (3, 'wangWu', '123456');
SET FOREIGN_KEY_CHECKS = 1;
五、测试
访问 http://localhost:8080/user/all
项目地址:https://gitee.com/dream-cometrue/spring-boot-mybatis-plus