MyBatis Plus demo

README.md

@@ -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**
 

README_EN.md

@@ -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）

spring-boot-mybatis-plus/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 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>

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

+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);
+	}
+}

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

+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

+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

+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

+# 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

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

+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');
\ No newline at end of file

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

+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)
+);
\ No newline at end of file

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

+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() {
+	}
+
+}

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

+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);
+        }
+    }
+
+
+}
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