mybatis-plus之代码生成器

当我们需要对数据库操作时，常规的做法是建立dao，service，controller，mapper.xml文件，一系列繁琐的操作让我们总在做无用功，以前可以用****生成，现在mybatis-plus也给我们提供了模板，而且功能更加的灵活和强大，我们只要配置好基本的参数，就可以自动生成了，下面正式开始奇迹之旅吧！

1、pom文件

<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>2.0.3.RELEASE</version>
</parent>


<dependencies>
    <!-- spring-boot -->
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>

    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-test</artifactId>
        <scope>test</scope>
    </dependency>


    <!--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>

    <!-- 引入Druid依赖，阿里巴巴所提供的数据源 -->
    <dependency>
        <groupId>com.alibaba</groupId>
        <artifactId>druid</artifactId>
        <version>1.0.29</version>
    </dependency>

    <!-- 提供mysql驱动 -->
    <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
        <version>5.1.38</version>
    </dependency>

    <dependency>
        <groupId>org.projectlombok</groupId>
        <artifactId>lombok</artifactId>
        <version>1.16.16</version>
    </dependency>

</dependencies>

2、启动类

package com.springboot.mybatisplus;

import com.baomidou.mybatisplus.core.toolkit.StringPool;
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;

/**
 * @Description:
 * @Auther: chenmingjian
 * @Date: 18-10-25 18:14
 */

public class CodeGenerator {
    //作者
    private static final String author = "chenmingjian";

    //数据库
    private static final String url = "jdbc:mysql://192.168.3.172:3306/poc?useUnicode=true&useSSL=false&characterEncoding=utf8";
    private static final String driverName = "com.mysql.jdbc.Driver";
    private static final String userName = "devuser";
    private static final String password = "dev123";
    private static final String table_name = "tb_test_student";

    //表对应的基类名
    private static final String entityName = "Student";

    //如StudentController,StudentService
    private static final String name_prex = "Student";

    //生成在该目录下
    private static final String package_name = "com.springboot.mybatisplus";


    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");
        gc.setOutputDir(projectPath + "/src/main/java");
        gc.setAuthor(author);
        gc.setOpen(false);
        gc.setEntityName(entityName);
        gc.setMapperName(name_prex + "Mapper");
        gc.setControllerName(name_prex + "Controller");
        gc.setServiceName(name_prex + "Service");
        gc.setServiceImplName(name_prex + "ServiceImpl");
        mpg.setGlobalConfig(gc);

        // 数据源配置
        DataSourceConfig dsc = new DataSourceConfig();
        dsc.setUrl(url);
        // dsc.setSchemaName("public");
        dsc.setDriverName(driverName);
        dsc.setUsername(userName);
        dsc.setPassword(password);
        mpg.setDataSource(dsc);

        // 包配置
        PackageConfig pc = new PackageConfig();
        //pc.setModuleName(scanner("模块名"));
        pc.setParent(package_name);
        mpg.setPackageInfo(pc);

        // 自定义配置
        InjectionConfig cfg = new InjectionConfig() {
            @Override
            public void initMap() {
                // to do nothing
            }
        };
        List<FileOutConfig> 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();
        strategy.setNaming(NamingStrategy.underline_to_camel);
        strategy.setColumnNaming(NamingStrategy.underline_to_camel);
//        strategy.setSuperEntityClass("com.baomidou.ant.common.BaseEntity");
        strategy.setEntityLombokModel(true);
        strategy.setRestControllerStyle(true);
//        strategy.setSuperControllerClass("com.baomidou.ant.common.BaseController");
        strategy.setInclude(table_name);
        strategy.setSuperEntityColumns("id");
        strategy.setControllerMappingHyphenStyle(true);
        strategy.setTablePrefix(pc.getModuleName() + "_");
        mpg.setStrategy(strategy);
        mpg.setTemplateEngine(new FreemarkerTemplateEngine());
        mpg.execute();
    }

}

3、生成结果展示

mybatis-plus官网：http://mp.baomidou.com/guide/generator.html