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05.5-借助mybatis-plus使用代码生成器(pojo)

程序员文章站 2022-07-08 15:35:52
# # I 添加依赖直接全选复制即可

# 展示包结构

CodeGenerator.java和mapper.java.ftl为自己创建的，其他为mpbatis-plus代码生成器生成的代码
05.5-借助mybatis-plus使用代码生成器(pojo)

# I 添加依赖

直接全选复制即可

	<?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 https://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>2.4.3</version>
		<relativePath /> <!-- lookup parent from repository -->
	</parent>
	<groupId>cn.tedu</groupId>
	<artifactId>jt</artifactId>
	<version>0.0.1-SNAPSHOT</version>
	<name>jt</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>org.mybatis.spring.boot</groupId>
			<artifactId>mybatis-spring-boot-starter</artifactId>
			<version>2.1.4</version>
		</dependency>

		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-test</artifactId>
			<scope>test</scope>
		</dependency>
		<dependency>
			<groupId>com.baomidou</groupId>
			<artifactId>mybatis-plus-boot-starter</artifactId>
			<version>3.3.1</version>
		</dependency>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-freemarker</artifactId>
		</dependency>
		<dependency>
			<groupId>com.baomidou</groupId>
			<artifactId>mybatis-plus-generator</artifactId>
			<version>3.3.1</version>
		</dependency>
		<dependency>
			<groupId>com.baomidou</groupId>
			<artifactId>mybatis-plus-extension</artifactId>
			<version>3.3.1</version>
		</dependency>
		<dependency>
			<groupId>mysql</groupId>
			<artifactId>mysql-connector-java</artifactId>
		</dependency>
		<dependency>
			<groupId>org.projectlombok</groupId>
			<artifactId>lombok</artifactId>
		</dependency>
	</dependencies>

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

</project>

# # II 在cn.tedu.genator包中创建CodeGenerator类直接复制以下代码即可

package cn.tedu.generator;

import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;
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.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.po.TableInfo;
import com.baomidou.mybatisplus.generator.config.rules.DateType;
import com.baomidou.mybatisplus.generator.config.rules.NamingStrategy;
import com.baomidou.mybatisplus.generator.engine.FreemarkerTemplateEngine;

/**
 * @Description: 代码生成类
 */
public class CodeGenerator {
    //数据库连接参数
    public static String driver = "com.mysql.cj.jdbc.Driver";
    public static String url = "jdbc:mysql://localhost:3306/straw?characterEncoding=utf8&useSSL=false&serverTimezone=Asia/Shanghai&rewriteBatchedStatements=true";
    public static String username="root";
    public static String password="root";
    //父级别包名称
    public static String parentPackage = "cn.tedu.straw";
    //代码生成的目标路径
    public static String generateTo = "/straw-generator/src/main/java";
    //mapper.xml的生成路径
    public static String mapperXmlPath = "/straw-generator/src/main/resources/mapper";
    //控制器的公共基类，用于抽象控制器的公共方法，null值表示没有父类
    public static String baseControllerClassName ;// = "cn.tedu.straw.portal.base.BaseController";
    //业务层的公共基类，用于抽象公共方法
    public static String baseServiceClassName ;   // = "cn.tedu.straw.portal.base.BaseServiceImpl";
    //作者名
    public static String author = "tedu.cn";
    //模块名称，用于组成包名
    public static String modelName = "portal";
    //Mapper接口的模板文件，不用写后缀 .ftl
    public static String mapperTempalte = "/ftl/mapper.java";

    /**
     * <p>
     * 读取控制台内容
     * </p>
     */
    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 + "！");
    }

    /**
     * RUN THIS
     */
    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 + generateTo);
        gc.setAuthor(author);
        gc.setOpen(false);
        //设置时间类型为Date
        gc.setDateType(DateType.TIME_PACK);
        //开启swagger
        //gc.setSwagger2(true);
        //设置mapper.xml的resultMap
        gc.setBaseResultMap(true);
        mpg.setGlobalConfig(gc);

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

        // 包配置
        PackageConfig pc = new PackageConfig();
        pc.setEntity("model");
        //pc.setModuleName(scanner("模块名"));
        pc.setModuleName(modelName);
        pc.setParent(parentPackage);
        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 + mapperXmlPath
                        + "/" + tableInfo.getEntityName() + "Mapper" + StringPool.DOT_XML;
            }
        });
        cfg.setFileOutConfigList(focList);
        mpg.setCfg(cfg);
        mpg.setTemplate(new TemplateConfig().setXml(null));
        mpg.setTemplate(new TemplateConfig().setMapper(mapperTempalte));

        // 策略配置
        StrategyConfig strategy = new StrategyConfig();
        strategy.setNaming(NamingStrategy.underline_to_camel);
        //字段驼峰命名
        strategy.setColumnNaming(NamingStrategy.underline_to_camel);
        //设置实体类的lombok
        strategy.setEntityLombokModel(true);
        //设置controller的父类
        if (baseControllerClassName!=null) strategy.setSuperControllerClass(baseControllerClassName);
        //设置服务类的父类
        if (baseServiceClassName !=null ) strategy.setSuperServiceImplClass(baseServiceClassName);
        // strategy.
        //设置实体类属性对应表字段的注解
        strategy.setEntityTableFieldAnnotationEnable(true);
        //设置表名
        String tableName = scanner("表名, all全部表");
        if(! "all".equalsIgnoreCase(tableName)){
            strategy.setInclude(tableName);
        }
        strategy.setTablePrefix(pc.getModuleName() + "_");
        strategy.setRestControllerStyle(true);
        mpg.setStrategy(strategy);

        // 选择 freemarker 引擎需要指定如下加，注意 pom 依赖必须有！
        mpg.setTemplateEngine(new FreemarkerTemplateEngine());
        mpg.execute();
    }

}

此方法需要需要更改包路径和数据库密码，之后配置第二步运行即可

# # III 在resources/ftl/目录下创建文件mapper.java.ftl然后直接复制即可

import ${package.Entity}.${entity};
import ${superMapperClassPackage};
import org.springframework.stereotype.Repository;

/**
 * <p>
 * ${table.comment!} Mapper 接口
 * </p>
 *
 * @author ${author}
 * @since ${date}
 */
<#if kotlin>
interface ${table.mapperName} : ${superMapperClass}<${entity}>
<#else>
@Repository
public interface ${table.mapperName} extends ${superMapperClass}<${entity}> {

}
</#if>

运行第一步即可，直接生成

本文地址：https://blog.csdn.net/weixin_48621005/article/details/114264055

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