简介：MyBatis-Plus（简称 MP）是一个 MyBatis 的增强工具，在 MyBatis 的基础上只做增强不做改变，为简化开发、提高效率而生。
springboot+maven+mybatis-plus+mysql
项目整体结构：
Mybatis-plus需要的以来文件：
<!--mybatis-plus自动的维护了mybatis以及mybatis-spring的依赖，
在springboot中这三者不能同时的出现，避免版本的冲突，表示：跳进过这个坑-->
<dependency>
<groupId>com.baomidou</groupId>
<artifactId>mybatis-plus-boot-starter</artifactId>
<version>3.0.1</version>
</dependency>
<!--集成mybatis -->
<!-- 与数据库操作相关的依赖 -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-jdbc</artifactId>
</dependency>
<!-- mybatisplus 代码生成器 -->
<!-- 模板引擎 -->
<dependency>
<groupId>org.apache.velocity</groupId>
<artifactId>velocity-engine-core</artifactId>
<version>2.0</version>
</dependency>
<!-- 模板引擎，需要指定 mpg.setTemplateEngine(new FreemarkerTemplateEngine()); -->
<dependency>
<groupId>org.freemarker</groupId>
<artifactId>freemarker</artifactId>
<version>2.3.23</version>
</dependency>
编写mybatisplus 自动生成器MybatisPlusGenerator.java(基于单列模式进行创建)
在MybatisPlusGenerator中配置生成的文件存放位置以及数据库连接
运行Main方法生成全套文件
package com.lee.springbootdemo.config;
import com.baomidou.mybatisplus.annotation.DbType;
import com.baomidou.mybatisplus.generator.AutoGenerator;
import com.baomidou.mybatisplus.generator.config.DataSourceConfig;
import com.baomidou.mybatisplus.generator.config.GlobalConfig;
import com.baomidou.mybatisplus.generator.config.PackageConfig;
import com.baomidou.mybatisplus.generator.config.StrategyConfig;
import com.baomidou.mybatisplus.generator.config.rules.NamingStrategy;
/**
* @author Administrator
* @title: MybatisPlusGenerator
* @projectName springboot-demo
* @description: TODO
* @date 2019/9/16 0016下午 14:49
*/
public class MybatisPlusGenerator {
private static MybatisPlusGenerator single = null;
private MybatisPlusGenerator() {
super();
}
private static MybatisPlusGenerator getSingle() {
if (single == null) {
single = new MybatisPlusGenerator();
}
return single;
}
public void autoGeneration() {
GlobalConfig config = new GlobalConfig();
String dbUrl = "jdbc:mysql://localhost:3306/test?serverTimezone=GMT%2B8";
DataSourceConfig dataSourceConfig = new DataSourceConfig();
dataSourceConfig.setDbType(DbType.MYSQL)
.setUrl(dbUrl)
.setUsername("root")
.setPassword("123456")
.setDriverName("com.mysql.jdbc.Driver");
StrategyConfig strategyConfig = new StrategyConfig();
strategyConfig
.setCapitalMode(true)
.setEntityLombokModel(false)
// .setDbColumnUnderline(true)
.setNaming(NamingStrategy.underline_to_camel);
config.setActiveRecord(false)
.setEnableCache(false)
.setAuthor("admin")
//指定输出文件夹位置
.setOutputDir("D:\\project\\springboot-demo\\src\\main\\java")
.setFileOverride(true)
.setServiceName("%sService");
new AutoGenerator().setGlobalConfig(config)
.setDataSource(dataSourceConfig)
.setStrategy(strategyConfig)
.setPackageInfo(
new PackageConfig()
.setParent("com.lee.springboot")
.setController("controller")
.setEntity("entity")
).execute();
}
public static void main(String[] args) {
// TODO Auto-generated method stub
MybatisPlusGenerator generator = MybatisPlusGenerator.getSingle();
generator.autoGeneration();
}
}项目的配置信息：
在MybatisPlusConfig 中配置数据源，分页插件，事务管理，sql执行性能分析
配置MapperScan扫描dao/mapper接口
package com.lee.springbootdemo.config;
import com.alibaba.druid.pool.DruidDataSource;
import com.baomidou.mybatisplus.extension.plugins.PaginationInterceptor;
import com.baomidou.mybatisplus.extension.plugins.PerformanceInterceptor;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.jdbc.datasource.DataSourceTransactionManager;
import javax.sql.DataSource;
/**
* @author Administrator
* @title: MybatisPlusConfig
* @projectName springboot-demo
* @description: TODO
* @date 2019/9/18 0018下午 17:09
*/
@Configuration
@MapperScan("com.lee.springboot.mapper")
public class MybatisPlusConfig {
/***
* plus 的性能优化
* @return
*/
@Bean
public PerformanceInterceptor performanceInterceptor() {
PerformanceInterceptor performanceInterceptor = new PerformanceInterceptor();
/*<!-- SQL 执行性能分析，开发环境使用，线上不推荐。 maxTime 指的是 sql 最大执行时长 -->*/
performanceInterceptor.setMaxTime(1000);
/*<!--SQL是否格式化 默认false-->*/
performanceInterceptor.setFormat(true);
return performanceInterceptor;
}
/**
* @Description : mybatis-plus分页插件
*/
@Bean
public PaginationInterceptor paginationInterceptor() {
return new PaginationInterceptor();
}
// 配置数据源
@Bean(name="dataSource")
@ConfigurationProperties(prefix="spring.datasource")
public DataSource dataSource(){
return new DruidDataSource();
}
// 配置事物管理器
@Bean(name="transactionManager")
public DataSourceTransactionManager transactionManager(){
return new DataSourceTransactionManager(dataSource());
}
}
配置application.propertiesspring.datasource.type=com.alibaba.druid.pool.DruidDataSource
spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
spring.datasource.url=jdbc:mysql://localhost:3306/test?serverTimezone=GMT%2B8
spring.datasource.username=root
spring.datasource.password=123456
spring.datasource.initialSize=5
spring.datasource.minIdle=5
spring.datasource.maxActive=20
spring.datasource.maxWait=60000
spring.datasource.timeBetweenEvictionRunsMillis=60000
spring.datasource.minEvictableIdleTimeMillis=300000
spring.datasource.validationQuery=SELECT 1 FROM DUAL
spring.datasource.testWhileIdle=true
spring.datasource.testOnBorrow=false
spring.datasource.testOnReturn=false
spring.datasource.poolPreparedStatements=true
spring.datasource.maxPoolPreparedStatementPerConnectionSize=20
spring.datasource.filters=stat,wall,log4j
spring.datasource.connectionProperties=druid.stat.mergeSql=true;druid.stat.slowSqlMillis=5000
mybatis-plus.mapper-locations=classpath:/mapper/*Mapper.xml
mybatis-plus.typeAliasesPackage=com.zzg.springboot.entity
做完以上就可以做一个简单地测试了。package com.lee.springbootdemo;
import com.lee.springboot.entity.ASCategory;
import com.lee.springboot.mapper.ASCategoryMapper;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;
import javax.annotation.Resource;
import java.util.List;
@RunWith(SpringRunner.class)
@SpringBootTest
public class SpringbootDemoApplicationTests {
@Resource
private ASCategoryMapper asCategoryMapper;
@Test
public void contextLoads() {
System.out.println("run in ----------------->test");
List<ASCategory> asCategoryList = asCategoryMapper.selectList(null);
asCategoryList.forEach(System.out::println);
}
}原文地址：https://blog.csdn.net/zhouzhiwengang/article/details/81059086