spring boot+mybatis-plus整理

Posted 2022-11-10 lideqiang0909

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.properties

spring.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