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MyBatis Plus demo
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‎README.md

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@@ -33,6 +33,7 @@ Spring Boot 使用的各种示例，以最简单、最实用为标准，此开
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- [spring-boot-webflux](https://github.com/ityouknow/spring-boot-examples/tree/master/spring-boot-webflux) ：Spring Boot webflux 示例
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- [spring-boot-elasticsearch](https://github.com/ityouknow/spring-boot-examples/tree/master/spring-boot-elasticsearch) ：Spring Boot elasticsearch 示例
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- [spring-boot-swagger](https://github.com/ityouknow/spring-boot-examples/tree/master/spring-boot-swagger) ：Spring Boot swagger2 示例
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- [spring-boot-mybatis-plus](https://github.com/ityouknow/spring-boot-examples/tree/master/spring-boot-mybatis-plus) ：Spring Boot 集成 MyBatis Plus 示例
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**参考文章**
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‎README_EN.md

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@@ -23,6 +23,9 @@ Spring Boot examples, using the simplest and the most useful scene demos.
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- [spring-boot-webflux](https://github.com/ityouknow/spring-boot-examples/tree/master/spring-boot-webflux) ：Spring Boot webflux demo
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- [spring-boot-elasticsearch](https://github.com/ityouknow/spring-boot-examples/tree/master/spring-boot-elasticsearch) ：Spring Boot elasticsearch demo
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- [spring-boot-swagger](https://github.com/ityouknow/spring-boot-examples/tree/master/spring-boot-swagger) ：Spring Boot swagger2 demo
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- [spring-boot-mybatis-plus](https://github.com/ityouknow/spring-boot-examples/tree/master/spring-boot-mybatis-plus) ：Spring Boot MyBatis Plus demo
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---
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## Spring Boot （Already upgraded to 2.x）

‎spring-boot-mybatis-plus/pom.xml

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<?xml version="1.0" encoding="UTF-8"?>
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<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
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<modelVersion>4.0.0</modelVersion>
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<groupId>com.example</groupId>
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<artifactId>spring-boot-mybatis-plus</artifactId>
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<version>1.0.0</version>
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<packaging>jar</packaging>
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<name>Spring Boot MyBatis Plus</name>
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<description>Spring Boot 2 Demo</description>
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<parent>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-starter-parent</artifactId>
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<version>2.1.4.RELEASE</version>
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</parent>
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<properties>
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<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
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<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
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<java.version>1.8</java.version>
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</properties>
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<dependencies>
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<dependency>
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<groupId>org.projectlombok</groupId>
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<artifactId>lombok</artifactId>
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<optional>true</optional>
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</dependency>
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<dependency>
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<groupId>com.baomidou</groupId>
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<artifactId>mybatis-plus-boot-starter</artifactId>
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<version>3.1.1</version>
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</dependency>
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<dependency>
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<groupId>com.h2database</groupId>
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<artifactId>h2</artifactId>
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<scope>runtime</scope>
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</dependency>
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<dependency>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-starter-test</artifactId>
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<scope>test</scope>
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</dependency>
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</dependencies>
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<build>
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<plugins>
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<plugin>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-maven-plugin</artifactId>
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</plugin>
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</plugins>
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</build>
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</project>

‎spring-boot-mybatis-plus/src/main/java/com/neo/MyBatisPlusApplication.java

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package com.neo;
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import org.springframework.boot.SpringApplication;
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import org.springframework.boot.autoconfigure.SpringBootApplication;
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@SpringBootApplication
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public class MyBatisPlusApplication {
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public static void main(String[] args) {
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SpringApplication.run(MyBatisPlusApplication.class, args);
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}
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}

‎spring-boot-mybatis-plus/src/main/java/com/neo/config/MybatisPlusConfig.java

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package com.neo.config;
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import com.baomidou.mybatisplus.extension.plugins.PaginationInterceptor;
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import org.mybatis.spring.annotation.MapperScan;
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import org.springframework.context.annotation.Bean;
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import org.springframework.context.annotation.Configuration;
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@Configuration
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@MapperScan("com.neo.mapper")
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public class MybatisPlusConfig {
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/**
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* 分页插件
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*/
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@Bean
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public PaginationInterceptor paginationInterceptor() {
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return new PaginationInterceptor();
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}
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}

‎spring-boot-mybatis-plus/src/main/java/com/neo/mapper/UserMapper.java

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package com.neo.mapper;
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import com.baomidou.mybatisplus.core.mapper.BaseMapper;
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import com.neo.model.User;
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public interface UserMapper extends BaseMapper<User> {
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}

‎spring-boot-mybatis-plus/src/main/java/com/neo/model/User.java

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package com.neo.model;
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import lombok.Data;
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@Data
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public class User {
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private Long id;
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private String name;
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private Integer age;
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private String email;
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}

‎spring-boot-mybatis-plus/src/main/resources/application.yml

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# DataSource Config
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spring:
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datasource:
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driver-class-name: org.h2.Driver
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schema: classpath:db/schema-h2.sql
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data: classpath:db/data-h2.sql
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url: jdbc:h2:mem:test
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username: root
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password: test
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# Logger Config
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logging:
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level:
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com.neo: debug

‎spring-boot-mybatis-plus/src/main/resources/db/data-h2.sql

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DELETE FROM user;
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INSERT INTO user (id, name, age, email) VALUES
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(1, 'neo', 18, '[email protected]'),
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(2, 'keep', 36, '[email protected]'),
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(3, 'pure', 28, '[email protected]'),
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(4, 'smile', 21, '[email protected]'),
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(5, 'it', 24, '[email protected]');

‎spring-boot-mybatis-plus/src/main/resources/db/schema-h2.sql

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DROP TABLE IF EXISTS user;
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CREATE TABLE user
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(
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id BIGINT(20) NOT NULL COMMENT '主键ID',
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name VARCHAR(30) NULL DEFAULT NULL COMMENT '姓名',
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age INT(11) NULL DEFAULT NULL COMMENT '年龄',
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email VARCHAR(50) NULL DEFAULT NULL COMMENT '邮箱',
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PRIMARY KEY (id)
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);

‎spring-boot-mybatis-plus/src/test/java/com/neo/MyBatisPlusApplicationTests.java

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package com.neo;
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import org.junit.Test;
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import org.junit.runner.RunWith;
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import org.springframework.boot.test.context.SpringBootTest;
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import org.springframework.test.context.junit4.SpringRunner;
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@RunWith(SpringRunner.class)
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@SpringBootTest
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public class MyBatisPlusApplicationTests {
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@Test
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public void contextLoads() {
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}
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}

‎spring-boot-mybatis-plus/src/test/java/com/neo/MyBatisPlusTest.java

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package com.neo;
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import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
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import com.baomidou.mybatisplus.core.metadata.IPage;
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import com.baomidou.mybatisplus.core.toolkit.CollectionUtils;
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import com.baomidou.mybatisplus.core.toolkit.Wrappers;
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import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
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import com.neo.mapper.UserMapper;
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import com.neo.model.User;
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import org.junit.Assert;
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import org.junit.Test;
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import org.junit.runner.RunWith;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.boot.test.context.SpringBootTest;
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import org.springframework.test.context.junit4.SpringRunner;
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import java.util.List;
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import static org.assertj.core.api.Assertions.assertThat;
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@RunWith(SpringRunner.class)
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@SpringBootTest
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public class MyBatisPlusTest {
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@Autowired
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private UserMapper userMapper;
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@Test
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public void testSelectOne() {
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User user = userMapper.selectById(1L);
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System.out.println(user);
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}
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@Test
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public void testInsert() {
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User user = new User();
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user.setName("微笑");
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user.setAge(3);
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user.setEmail("[email protected]");
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assertThat(userMapper.insert(user)).isGreaterThan(0);
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// 成功直接拿会写的 ID
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assertThat(user.getId()).isNotNull();
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}
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@Test
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public void testDelete() {
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assertThat(userMapper.deleteById(3L)).isGreaterThan(0);
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assertThat(userMapper.delete(new QueryWrapper<User>()
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.lambda().eq(User::getName, "smile"))).isGreaterThan(0);
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}
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@Test
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public void testUpdate() {
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User user = userMapper.selectById(2);
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assertThat(user.getAge()).isEqualTo(36);
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assertThat(user.getName()).isEqualTo("keep");
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userMapper.update(
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null,
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Wrappers.<User>lambdaUpdate().set(User::getEmail, "123@123").eq(User::getId, 2)
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);
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assertThat(userMapper.selectById(2).getEmail()).isEqualTo("123@123");
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}
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@Test
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public void testSelect() {
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List<User> userList = userMapper.selectList(null);
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Assert.assertEquals(5, userList.size());
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userList.forEach(System.out::println);
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}
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@Test
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public void testSelectCondition() {
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QueryWrapper<User> wrapper = new QueryWrapper<>();
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wrapper.select("max(id) as id");
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List<User> userList = userMapper.selectList(wrapper);
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userList.forEach(System.out::println);
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}
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@Test
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public void testPage() {
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System.out.println("----- baseMapper 自带分页 ------");
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Page<User> page = new Page<>(1, 2);
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IPage<User> userIPage = userMapper.selectPage(page, new QueryWrapper<User>()
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.gt("age", 6));
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assertThat(page).isSameAs(userIPage);
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System.out.println("总条数 ------> " + userIPage.getTotal());
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System.out.println("当前页数 ------> " + userIPage.getCurrent());
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System.out.println("当前每页显示数 ------> " + userIPage.getSize());
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print(userIPage.getRecords());
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System.out.println("----- baseMapper 自带分页 ------");
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}
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private <T> void print(List<T> list) {
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if (!CollectionUtils.isEmpty(list)) {
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list.forEach(System.out::println);
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}
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}
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}

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