MyBatis Plus中代码生成器使用详解

按照官网上实例尝试了一下，感觉MyBatis plus中代码生成器还是很强大的，以下是测试的总结：

使用MybatisPlus的主要依赖

引入plus依赖（苞米豆）

<dependency>
  <groupId>com.baomidou</groupId>
  <artifactId>mybatis-plus-boot-starter</artifactId>
  <version>3.1.1</version>
  </dependency>

生成器依赖

<dependency>
  <groupId>com.baomidou</groupId>
  <artifactId>mybatis-plus-generator</artifactId>
  <version>3.1.1</version>
 </dependency>

模板依赖

<dependency>
  <groupId>org.freemarker</groupId>
  <artifactId>freemarker</artifactId>
  <version>2.3.28</version>
 </dependency>

测试的pom依赖（也有我测试别东西的依赖，多余的请忽略）

<?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>
 <parent>
 <groupId>org.springframework.boot</groupId>
 <artifactId>spring-boot-starter-parent</artifactId>
 <version>2.1.5.RELEASE</version>
 <relativePath/> <!-- lookup parent from repository -->
 </parent>
 <groupId>com.wy</groupId>
 <artifactId>testpuls</artifactId>
 <version>0.0.1-SNAPSHOT</version>
 <name>testpuls</name>
 <description>Demo project for Spring Boot</description>

 <properties>
 <java.version>1.8</java.version>
 </properties>

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

 <dependency>
  <groupId>mysql</groupId>
  <artifactId>mysql-connector-java</artifactId>
  <scope>runtime</scope>
 </dependency>
 <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.baomidou</groupId>
  <artifactId>mybatis-plus-generator</artifactId>
  <version>3.1.1</version>
 </dependency>
 <dependency>
  <groupId>org.freemarker</groupId>
  <artifactId>freemarker</artifactId>
  <version>2.3.28</version>
 </dependency>
 <dependency>
  <groupId>org.springframework.boot</groupId>
  <artifactId>spring-boot-starter-test</artifactId>
  <scope>test</scope>
 </dependency>
 <dependency>
  <groupId>junit</groupId>
  <artifactId>junit</artifactId>
  <version>4.12</version>
  <scope>test</scope>
 </dependency>
 <dependency>
  <groupId>org.springframework</groupId>
  <artifactId>spring-test</artifactId>
  <version>5.1.7.RELEASE</version>
  <scope>compile</scope>
 </dependency>
 <dependency>
  <groupId>junit</groupId>
  <artifactId>junit</artifactId>
 </dependency>
 <dependency>
  <groupId>org.springframework.boot</groupId>
  <artifactId>spring-boot-test</artifactId>
 </dependency>
 <dependency>
  <groupId>com.capgemini.mrchecker</groupId>
  <artifactId>mrchecker-core-module</artifactId>
  <version>4.12.1.1</version>
 </dependency>
 <dependency>
  <groupId>org.springframework.cloud</groupId>
  <artifactId>spring-cloud-spring-service-connector</artifactId>
  <version>2.0.4.RELEASE</version>
 </dependency>
 <dependency>
  <groupId>com.capgemini.mrchecker</groupId>
  <artifactId>mrchecker-core-module</artifactId>
  <version>4.12.1.1</version>
 </dependency>
 </dependencies>

 <build>
 <plugins>
  <plugin>
  <groupId>org.springframework.boot</groupId>
  <artifactId>spring-boot-maven-plugin</artifactId>
  </plugin>
 </plugins>
 </build>

</project>

代码生成器类

package com.wy.testpuls.util;

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;

public class MyGenerator {
  public static String scanner(String someThing) {
    Scanner scanner = new Scanner(System.in);
    StringBuilder help = new StringBuilder();
    help.append("请输入" + someThing + "：");
    System.out.println(help.toString());
    if (scanner.hasNext()) {
      String sc = scanner.next();
      if (StringUtils.isNotEmpty(sc)) {
        return sc;
      }
    }
    throw new MybatisPlusException("请输入正确的" + someThing + "！");
  }

  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("山石");
    gc.setOpen(false);
    mpg.setGlobalConfig(gc);

    // 数据源配置
    DataSourceConfig dsc = new DataSourceConfig();
    dsc.setUrl("jdbc:mysql://localhost:3306/test?useUnicode=true&useSSL=false&characterEncoding=utf8");
    dsc.setDriverName("com.mysql.jdbc.Driver");
    dsc.setUsername("root");
    dsc.setPassword("admin");
    mpg.setDataSource(dsc);

    // 包配置
    PackageConfig pc = new PackageConfig();
    pc.setModuleName(scanner("请输入你的包名"));
    pc.setParent("com.wy");//你哪个父目录下创建包
    mpg.setPackageInfo(pc);

    // 自定义配置
    InjectionConfig cfg = new InjectionConfig() {
      @Override
      public void initMap() {
        // to do nothing
      }
    };

    // 如果模板引擎是 freemarker
    String templatePath = "/templates/mapper.xml.ftl";
    // 如果模板引擎是 velocity
    // String templatePath = "/templates/mapper.xml.vm";

    // 自定义输出配置
    List<FileOutConfig> focList = new ArrayList<>();
    // 自定义配置会被优先输出
    focList.add(new FileOutConfig(templatePath) {
      @Override
      public String outputFile(TableInfo tableInfo) {
        // 自定义输出文件名 ， 如果你 Entity 设置了前后缀、此处注意 xml 的名称会跟着发生变化！！
        return projectPath + "/src/main/resources/mapper/" + pc.getModuleName()
            + "/" + tableInfo.getEntityName() + "Mapper" + StringPool.DOT_XML;
      }
    });
    cfg.setFileOutConfigList(focList);
    mpg.setCfg(cfg);

    // 配置模板
    TemplateConfig templateConfig = new TemplateConfig();

    // 配置自定义输出模板
    //指定自定义模板路径，注意不要带上.ftl/.vm, 会根据使用的模板引擎自动识别
    // templateConfig.setEntity("templates/entity2.java");
    // templateConfig.setService();
    // templateConfig.setController();

    templateConfig.setXml(null);
    mpg.setTemplate(templateConfig);

    // 策略配置,数据库表配置
    StrategyConfig strategy = new StrategyConfig();
    //数据库表映射到实体的命名策略
    strategy.setNaming(NamingStrategy.underline_to_camel);
    //数据库表字段映射到实体类的命名策略
    strategy.setColumnNaming(NamingStrategy.underline_to_camel);
    //自定义继承entity类，添加这一个会在生成实体类的时候继承entity
    //strategy.setSuperEntityClass("com.wy.testCodeGenerator.entity");
    //实体是否为lombok模型
    strategy.setEntityLombokModel(true);
    //生成@RestController控制器
    strategy.setRestControllerStyle(true);
    //是否继承controller
    // strategy.setSuperControllerClass("com.wy.testCodeGenerator.controller");
    strategy.setInclude(scanner("表名，多个英文逗号分割").split(","));
    strategy.setSuperEntityColumns("id");
    //驼峰转连字符串
    strategy.setControllerMappingHyphenStyle(true);
    //表前缀
    strategy.setTablePrefix(pc.getModuleName() + "_");
    mpg.setStrategy(strategy);
    mpg.setTemplateEngine(new FreemarkerTemplateEngine());
    mpg.execute();
  }
}

注意：测试时输入的表名必须和数据库中一致，区分大小写。

疑问：生成的实体类当中没有id。求解

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