Spring boot+Mybatis plus整合+Mybatis plus逆向工程

环境参数

jdk	1.8
数据库	Mysql5.5+
IDE	IDEA2018.2
Maven	3.3.9
Spring boot	2.1.0.RELEASE
Mybatis plus	3.0.5

1.建立Spring Initializr项目

2.添加进pom.xml所需要的依赖

    4.0.0

    com.lj
    demo
    0.0.1-SNAPSHOT
    jar

    demo
    Demo project for Spring Boot

    
        org.springframework.boot
        spring-boot-starter-parent
        2.1.0.RELEASE
         
    

    
        UTF-8
        UTF-8
        1.8
    

    
        
            org.springframework.boot
            spring-boot-starter-web
        
        
            org.mybatis.spring.boot
            mybatis-spring-boot-starter
            1.3.2
        
        
            com.baomidou
            mybatisplus-spring-boot-starter
            1.0.4
        


        
            mysql
            mysql-connector-java
            runtime
        
        
            org.springframework.boot
            spring-boot-starter-test
            test
        
        
        
            org.apache.velocity
            velocity-engine-core
            2.0
        
        
            com.baomidou
            mybatis-plus-boot-starter
            3.0.5
        

        
        
            org.projectlombok
            lombok
            1.16.20
            provided
        
		
        
            com.baomidou
            mybatis-plus
            3.0.5
        
		
        
        
            org.freemarker
            freemarker
            2.3.23
        
        
        
            mysql
            mysql-connector-java
            6.0.6
        
        
            org.junit.jupiter
            junit-jupiter-api
            RELEASE
            compile
        
        

    
        
            
                org.springframework.boot
                spring-boot-maven-plugin
            
        
    

3.Mybatis plus代码生成器
创建MysqlGenerator类

package com.lj.generator;

import com.baomidou.mybatisplus.annotation.DbType;
import com.baomidou.mybatisplus.annotation.IdType;
import com.baomidou.mybatisplus.core.exceptions.MybatisPlusException;
import com.baomidou.mybatisplus.core.toolkit.StringPool;
import com.baomidou.mybatisplus.core.toolkit.StringUtils;
import com.baomidou.mybatisplus.generator.AutoGenerator;
import com.baomidou.mybatisplus.generator.InjectionConfig;
import com.baomidou.mybatisplus.generator.config.*;
import com.baomidou.mybatisplus.generator.config.po.TableInfo;
import com.baomidou.mybatisplus.generator.config.rules.NamingStrategy;
import com.baomidou.mybatisplus.generator.engine.FreemarkerTemplateEngine;
import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;

// 演示例子，执行 main 方法控制台输入模块表名回车自动生成对应项目目录中
public class MysqlGenerator {

    /**
     * 

     * 读取控制台内容
     * 
     */
    public static String scanner(String tip) {
        Scanner scanner = new Scanner(System.in);
        StringBuilder help = new StringBuilder();
        help.append("请输入" + tip + "：");
        System.out.println(help.toString());
        if (scanner.hasNext()) {
            String ipt = scanner.next();
            if (StringUtils.isNotEmpty(ipt)) {
                return ipt;
            }
        }
        throw new MybatisPlusException("请输入正确的" + tip + "！");
    }

    public static void main(String[] args) {
        // 代码生成器
        AutoGenerator mpg = new AutoGenerator();

        // 全局配置
        GlobalConfig gc = new GlobalConfig();
        String projectPath = System.getProperty("user.dir");
        //outputDir：生成文件的输出目录，默认值：D 盘根目录
        gc.setOutputDir(projectPath + "/src/main/java");
        //IdType设置主键生成策略，默认值null
        gc.setIdType(IdType.UUID);
        //Author设置作者
        gc.setAuthor("LuJ");
        //Open：是否打开输出目录
        gc.setOpen(false);
        mpg.setGlobalConfig(gc);

        // 数据源配置
        DataSourceConfig dsc = new DataSourceConfig();
        dsc.setUrl("jdbc:mysql://localhost:3306/student?serverTimezone=UTC&&characterEncoding=utf-8&useSSL=false");
        // dsc.setSchemaName("public");
        dsc.setDriverName("com.mysql.cj.jdbc.Driver");
        dsc.setUsername("root");
        dsc.setPassword("1234");
        //设置数据库类型，默认MYSQL
        dsc.setDbType(DbType.MYSQL);
        mpg.setDataSource(dsc);

        // 包配置
        PackageConfig pc = new PackageConfig();
        pc.setModuleName(scanner("模块名"));
        //父包名。如果为空，将下面子包名必须写全部， 否则就只需写子包名
        pc.setParent("com.lj");
        mpg.setPackageInfo(pc);

        //模板配置


        // 自定义配置
        InjectionConfig cfg = new InjectionConfig() {
            @Override
            public void initMap() {
                // to do nothing
            }
        };
        List focList = new ArrayList<>();
        focList.add(new FileOutConfig("/templates/mapper.xml.ftl") {
            @Override
            public String outputFile(TableInfo tableInfo) {
                // 自定义输入文件名称
                return projectPath + "/src/main/resources/mapper/" + pc.getModuleName()
                        + "/" + tableInfo.getEntityName() + "Mapper" + StringPool.DOT_XML;
            }
        });
        cfg.setFileOutConfigList(focList);
        mpg.setCfg(cfg);
        mpg.setTemplate(new TemplateConfig().setXml(null));


        // 策略配置
        StrategyConfig strategy = new StrategyConfig();
        //设置命名格式
        strategy.setNaming(NamingStrategy.underline_to_camel);
        //【实体】是否为lombok模型（默认 false）
        strategy.setEntityLombokModel(false);
        //生成 @RestController 控制器
        strategy.setRestControllerStyle(true);
        strategy.setInclude(scanner("表名"));
        //驼峰转连字符
        strategy.setControllerMappingHyphenStyle(true);
        //表名前缀
        strategy.setTablePrefix(pc.getModuleName() + "_");
        //是否生成实体时，生成字段注解
        strategy.entityTableFieldAnnotationEnable(true);
        //设置自定义继承的Entity类全称，带包名
//       strategy.setSuperEntityClass("com.lj.common.BaseEntit");
        //设置自定义继承的Controller类全称，带包名
//        strategy.setSuperControllerClass("com.lj.common.BaseController");
        //设置自定义基础的Entity类，公共字段
//        strategy.setSuperEntityColumns("id");
        mpg.setStrategy(strategy);
        mpg.setTemplateEngine(new FreemarkerTemplateEngine());
        mpg.execute();
    }
}

4.application.yml配置信息

# DataSource Config
spring:
  datasource:
    driver-class-name: com.mysql.cj.jdbc.Driver
    url: jdbc:mysql://localhost:3306/student?serverTimezone=UTC&&characterEncoding=utf-8&useSSL=false
    username: root
    password: 1234

#mybatis-plus:
#    mapper-locations: classpath:mapper/*.xml
#    typeAliasesPackage: com.lj.demo.entity
#    configuration:
#      map-underscore-to-camel-case: true  #使用驼峰法映射属性
#    global-config:
#      #主键类型  0:"数据库ID自增", 1:"用户输入ID",2:"全局唯一ID (数字类型唯一ID)", 3:"全局唯一ID UUID";
#      id-type: 0
#      #字段策略 0:"忽略判断",1:"非 NULL 判断"),2:"非空判断"
#      field-strategy: 2
#      #驼峰下划线转换
#      db-column-underline: true
#      #刷新mapper 调试神器
#      refresh-mapper: true
#      #数据库大写下划线转换
#      #capital-mode: true
#      #序列接口实现类配置
#      #key-generator: com.baomidou.springboot.xxx
#      #逻辑删除配置
#      #logic-delete-value: 0
#      #logic-not-delete-value: 1
#      #自定义填充策略接口实现
#      #meta-object-handler: com.baomidou.springboot.xxx
#      #自定义SQL注入器
#      #sql-injector: com.baomidou.springboot.xxx

5.执行MysqlGenerator
执行后自动生成对应Entity、Mapper、Mapper XML、Service、Controller 等各个模块的代码，以下是路径图

7.测试类DemoApplicationTest

package com.lj.demo;

import com.lj.demo.entity.Stu;
import com.lj.demo.mapper.StuMapper;
import org.junit.Assert;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;
import java.util.ArrayList;
import java.util.List;

@RunWith(SpringRunner.class)
@SpringBootTest
@MapperScan("com.lj.demo.mapper")
public class DemoApplicationTests {

    @Autowired
    StuMapper stuMapper;

    @Test
    public void contextLoads() {
        List stuList = new ArrayList<>();
        Stu stu = new Stu("join","2",40,"18855544444");
        stuMapper.insert(stu);
//        stuList.forEach(System.out::println);
//        Assert.assertEquals(0, stuList.size());
    }

}

测试结果：