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mybatis-plus:使用Mybatis-AutoGenerator代码生成器(1)

AutoGenerator 是 MyBatis-Plus 的代码生成器，通过 AutoGenerator 可以快速生成包括 Entity、Mapper、Mapper XML、Service、Controller 数个模块的代码，可以提升开发效率.

首先,进入 https://start.spring.io 生成一个springboot简单项目
下步,数据表SQL

CREATE TABLE `soldier` (                                           
            `soldier_id` int(11) NOT NULL AUTO_INCREMENT COMMENT '士兵编号',  
            `soldier_name` varchar(30) NOT NULL COMMENT '士兵名字',           
            `join_army_time` timestamp NOT NULL COMMENT '参军时间',           
            PRIMARY KEY (`soldier_id`),                                      
            KEY `sid` (`soldier_id`)                                         
          ) ENGINE=InnoDB AUTO_INCREMENT=4 DEFAULT CHARSET=utf8;

依赖

以下有些依赖不1定是必须的,但积累甚多,就一并贴出,

版本号是经过多次甄选的.

<!-- dependencies -->
    <dependencies>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
            <exclusions>
                <exclusion>
                    <groupId>org.springframework.boot</groupId>
                    <artifactId>spring-boot-starter-logging</artifactId>
                </exclusion>
            </exclusions>
        </dependency>

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

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <scope>runtime</scope>
            <!-- 为true,即热部署有效 -->
            <optional>false</optional>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
            <exclusions>
                <exclusion>
                    <groupId>org.junit.vintage</groupId>
                    <artifactId>junit-vintage-engine</artifactId>
                </exclusion>
            </exclusions>
        </dependency>

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

        <!-- mybatis-plus自动代码生成 -->
        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus-generator</artifactId>
            <version>3.0.7.1</version>
        </dependency>

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

        <!-- 低于1.3.7也许会报错 -->
        <dependency>
            <groupId>org.mybatis.generator</groupId>
            <artifactId>mybatis-generator-core</artifactId>
            <version>1.3.7</version>
        </dependency>

        <!-- https://mvnrepository.com/artifact/org.mybatis.spring.boot/mybatis-spring-boot-starter -->
        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
            <version>2.1.0</version>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
        </dependency>

        <!--日志记录配置 -->
        <dependency>
            <groupId>com.github.vindell</groupId>
            <artifactId>spring-boot-starter-log4j2-plus</artifactId>
            <version>1.0.5.RELEASE</version>
        </dependency>

        <!--日志记录配置 -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-log4j</artifactId>
            <version>1.3.8.RELEASE</version>
        </dependency>

        <!-- pagehelper -->
        <dependency>
            <groupId>com.github.pagehelper</groupId>
            <artifactId>pagehelper-spring-boot-starter</artifactId>
            <version>1.2.5</version>
        </dependency>

        <!-- session -->
        <dependency>
            <groupId>org.springframework.session</groupId>
            <artifactId>spring-session-core</artifactId>
        </dependency>

        <!-- 简化实体类(set/get/tostring/hashcode...etc) -->
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
        </dependency>

        <!-- HikariCP数据源,阿里数据源druid会因LocalDateTime报错 -->
        <dependency>
            <groupId>com.zaxxer</groupId>
            <artifactId>HikariCP</artifactId>
            <version>3.3.1</version>
        </dependency>

        <!-- java for mysql connector -->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>8.0.11</version>
        </dependency>

        <!-- tomcat的支持 -->
        <dependency>
            <groupId>org.apache.tomcat.embed</groupId>
            <artifactId>tomcat-embed-jasper</artifactId>
        </dependency>

        <!-- ActiveMQ:Apache所提供的一个开源的消息系统 -->
        <dependency>
            <groupId>org.apache.activemq</groupId>
            <artifactId>activemq-all</artifactId>
            <version>5.15.9</version>
        </dependency>

        <!-- Java语法糖帮助包,帮助简化代码,减少方法 -->
        <dependency>
            <groupId>cn.hutool</groupId>
            <artifactId>hutool-all</artifactId>
            <version>4.3.1</version>
        </dependency>

        <!-- servlet依赖 -->
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
        </dependency>
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>jstl</artifactId>
        </dependency>

    </dependencies>

配置mybatis-plus.properties文件

#此处为本项目src所在路径(代码生成器输出路径）
OutputDir=/home/gzh/eclipse-workspace/Boot-Demo/src/main/java

#mapper.xml的生成位置
OutputDirXml=/home/gzh/eclipse-workspace/Boot-Demo/src/main/resources

#数据库表名(此处切不可为空，如果为空，则默认读取数据库的所有表名)
tableName=soldier

#存放所生成代码文件的上一级包名
#className=自填

#设置作者
author=gene

#正常情况下，下面的代码无需修改
#自定义包路径
parent=cn.example.demo

#数据库地址
url=jdbc:mysql://localhost:3306/test00?serverTimezone=CTT&characterEncoding=UTF-8&useSSL=false

#mysql:username & password
userName=plh
password=1234

Java代码

注意导入的package,不要导错

package cn.example.demo.util;

import java.util.ArrayList;
import java.util.List;
import java.util.ResourceBundle;

import com.baomidou.mybatisplus.annotation.DbType;
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.DataSourceConfig;
import com.baomidou.mybatisplus.generator.config.FileOutConfig;
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.TemplateConfig;
import com.baomidou.mybatisplus.generator.config.rules.NamingStrategy;
import com.baomidou.mybatisplus.generator.engine.FreemarkerTemplateEngine;

/**
 * <p>
 * 代码生成器
 * </p>
 * 
 * @author gzh
 *
 */
public class MybatisPlusGenerator {
    public static void main(String[] args) throws InterruptedException {
        // 获取Mybatis-Plus.properties文件的配置信息
        final ResourceBundle rb = ResourceBundle.getBundle("mybatis-plus");

        // 代码生成器
        AutoGenerator mpg = new AutoGenerator();

        // 全局配置
        GlobalConfig gc = new GlobalConfig();

        gc.setOutputDir(rb.getString("OutputDir"));
        gc.setOpen(false);
        gc.setBaseResultMap(true);
        gc.setBaseColumnList(true);
        gc.setAuthor(rb.getString("author"));
        gc.setMapperName("%sMapper");
        gc.setXmlName("%sMapper");
        gc.setServiceName("%sService");
        gc.setServiceImplName("%sServiceImpl");
        gc.setControllerName("%sController");
        mpg.setGlobalConfig(gc);

        // dataSource配置
        DataSourceConfig dsc = new DataSourceConfig();
        dsc.setDbType(DbType.MYSQL);
        dsc.setUrl(rb.getString("url"));
        dsc.setDriverName("com.mysql.jdbc.Driver");
        dsc.setUsername(rb.getString("userName"));
        dsc.setPassword(rb.getString("password"));
        mpg.setDataSource(dsc);

        // package配置
        PackageConfig pc = new PackageConfig();
        pc.setParent(rb.getString("parent"));

        pc.setController("controller");
        pc.setService("service");
        pc.setServiceImpl("service.impl");
        pc.setEntity("bean");
        pc.setMapper("mapper");
        mpg.setPackageInfo(pc);

        // 自定义配置
        InjectionConfig cfg = new InjectionConfig() {
            @Override
            public void initMap() {
                /* ... */
            }
        };

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

        // 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(com.baomidou.mybatisplus.generator.config.po.TableInfo tableInfo) {
                // 自定义输入文件名称
                return rb.getString("OutputDirXml") + "/mapper/" + tableInfo.getEntityName() + 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.setEntityLombokModel(true);
        strategy.setInclude(new String[]{rb.getString("tableName")});

        mpg.setStrategy(strategy);
        mpg.setTemplateEngine(new FreemarkerTemplateEngine());
        mpg.execute();

        System.out.println("done,fresh engineering");
    }

}

运行上面的main方法,便可生成 xml/bean/mapper/service/controller 计5个模块的代码.

原文 https://segmentfault.com/a/1190000020910712

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