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MyBatis Plus demo

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纯洁的微笑
2019-05-13 17:30:48 +08:00
parent 6a1e4882a4
commit a6dfb84b61
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1
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
- [spring-boot-webflux](https://github.com/ityouknow/spring-boot-examples/tree/master/spring-boot-webflux) ：Spring Boot webflux 示例
- [spring-boot-elasticsearch](https://github.com/ityouknow/spring-boot-examples/tree/master/spring-boot-elasticsearch) ：Spring Boot elasticsearch 示例
- [spring-boot-swagger](https://github.com/ityouknow/spring-boot-examples/tree/master/spring-boot-swagger) ：Spring Boot swagger2 示例
- [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
**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.
- [spring-boot-webflux](https://github.com/ityouknow/spring-boot-examples/tree/master/spring-boot-webflux) ：Spring Boot webflux demo
- [spring-boot-elasticsearch](https://github.com/ityouknow/spring-boot-examples/tree/master/spring-boot-elasticsearch) ：Spring Boot elasticsearch demo
- [spring-boot-swagger](https://github.com/ityouknow/spring-boot-examples/tree/master/spring-boot-swagger) ：Spring Boot swagger2 demo
- [spring-boot-mybatis-plus](https://github.com/ityouknow/spring-boot-examples/tree/master/spring-boot-mybatis-plus) ：Spring Boot MyBatis Plus demo
---
## Spring Boot （Already upgraded to 2.x）

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

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spring-boot-mybatis-plus/src/main/java/com/neo/MyBatisPlusApplication.java Normal file
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package com.neo;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class MyBatisPlusApplication {
public static void main(String[] args) {
SpringApplication.run(MyBatisPlusApplication.class, args);
}
}

19
spring-boot-mybatis-plus/src/main/java/com/neo/config/MybatisPlusConfig.java Normal file
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package com.neo.config;
import com.baomidou.mybatisplus.extension.plugins.PaginationInterceptor;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
@Configuration
@MapperScan("com.neo.mapper")
public class MybatisPlusConfig {
/**
* 分页插件
*/
@Bean
public PaginationInterceptor paginationInterceptor() {
return new PaginationInterceptor();
}
}

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spring-boot-mybatis-plus/src/main/java/com/neo/mapper/UserMapper.java Normal file
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package com.neo.mapper;
import com.baomidou.mybatisplus.core.mapper.BaseMapper;
import com.neo.model.User;
public interface UserMapper extends BaseMapper<User> {
}

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spring-boot-mybatis-plus/src/main/java/com/neo/model/User.java Normal file
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package com.neo.model;
import lombok.Data;
@Data
public class User {
private Long id;
private String name;
private Integer age;
private String email;
}

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spring-boot-mybatis-plus/src/main/resources/application.yml Normal file
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# DataSource Config
spring:
datasource:
driver-class-name: org.h2.Driver
schema: classpath:db/schema-h2.sql
data: classpath:db/data-h2.sql
url: jdbc:h2:mem:test
username: root
password: test
# Logger Config
logging:
level:
com.neo: debug

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spring-boot-mybatis-plus/src/main/resources/db/data-h2.sql Normal file
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DELETE FROM user;
INSERT INTO user (id, name, age, email) VALUES
(1, 'neo', 18, 'smile1@ityouknow.com'),
(2, 'keep', 36, 'smile@ityouknow.com'),
(3, 'pure', 28, 'smile@ityouknow.com'),
(4, 'smile', 21, 'smile@ityouknow.com'),
(5, 'it', 24, 'smile@ityouknow.com');

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spring-boot-mybatis-plus/src/main/resources/db/schema-h2.sql Normal file
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DROP TABLE IF EXISTS user;
CREATE TABLE user
(
id BIGINT(20) NOT NULL COMMENT '主键ID',
name VARCHAR(30) NULL DEFAULT NULL COMMENT '姓名',
age INT(11) NULL DEFAULT NULL COMMENT '年龄',
email VARCHAR(50) NULL DEFAULT NULL COMMENT '邮箱',
PRIMARY KEY (id)
);

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spring-boot-mybatis-plus/src/test/java/com/neo/MyBatisPlusApplicationTests.java Normal file
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package com.neo;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;
@RunWith(SpringRunner.class)
@SpringBootTest
public class MyBatisPlusApplicationTests {
@Test
public void contextLoads() {
}
}

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