添加依賴

<properties>
    <mybatis-plus-generator.version>3.2.0</mybatis-plus-generator.version>
    <velocity.version>2.1</velocity.version>
    <freemarker.version>2.3.29</freemarker.version>
    <ibeetl.version>3.0.13.RELEASE</ibeetl.version>
    <junit.version>4.12</junit.version>
</properties>

<dependency>
    <groupId>com.baomidou</groupId>
    <artifactId>mybatis-plus-generator</artifactId>
    <version>${mybatis-plus-generator.version}</version>
</dependency>
<dependency>
    <groupId>org.apache.velocity</groupId>
    <artifactId>velocity-engine-core</artifactId>
    <version>${velocity.version}</version>
</dependency>
<dependency>
    <groupId>org.freemarker</groupId>
    <artifactId>freemarker</artifactId>
    <version>${freemarker.version}</version>
</dependency>
<dependency>
    <groupId>com.ibeetl</groupId>
    <artifactId>beetl</artifactId>
    <version>${ibeetl.version}</version>
</dependency>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>${junit.version}</version>
      <scope>compile</scope>
    </dependency>

工具類

package com.zzf.springboot.util;


import com.baomidou.mybatisplus.annotation.DbType;
import com.baomidou.mybatisplus.generator.AutoGenerator;
import com.baomidou.mybatisplus.generator.config.*;
import com.baomidou.mybatisplus.generator.config.rules.NamingStrategy;
import com.baomidou.mybatisplus.generator.engine.FreemarkerTemplateEngine;
import org.junit.Test;

/**
 *  運(yùn)行此方法生成mybatis代碼
 *  生成代碼自動(dòng)放入對(duì)應(yīng)目錄
 * @author wangshu
 * @create 2019/10/18
 */
public class MyBatisGeneratorRun {
    //數(shù)據(jù)庫(kù)類型
    private final DbType dbType = DbType.MYSQL;
    //數(shù)據(jù)庫(kù)連結(jié)信息
    private final String dbUrl = "jdbc:mysql://localhost:3306/zzf?useUnicode=true&characterEncoding=UTF-8";
    private final String driver = "com.mysql.jdbc.Driver";
    private final String userName = "root";
    private final String password = "root";

    //項(xiàng)目名
    private final String projectName = "spring-boot";
    //指定包名
    private final String packageName = "com.zzf.springboot";
    //controller基礎(chǔ)類
    private final String superControllerClass = packageName + ".common.BaseController";
    //entity基礎(chǔ)類
    private final String superEntityClass = packageName + ".common.BaseEntity";
    //模塊名 如果有模塊名，則需在模塊名前加. 例：.log
    private final String moduleName = "";
    //作者名
    private final String author = "zhuzhifeng";
    //指定生成的表名
    private final String[] tableNames = new String[]{"sys_role"};


    @Test
    public void generateCode() {
        //serviceNameStartWithI：user -> UserService, 設(shè)置成true: user -> IUserService
        generateByTables(false, packageName, tableNames);
    }
    /**
     * 根據(jù)表自動(dòng)生成
     * @param serviceNameStartWithI 默認(rèn)為false
     * @param packageName      包名
     * @param tableNames      表名
     * @author Terry
     */
    private void generateByTables(boolean serviceNameStartWithI, String packageName, String... tableNames) {
        //配置數(shù)據(jù)源
        DataSourceConfig dataSourceConfig = getDataSourceConfig();
        // 策略配置
        StrategyConfig strategyConfig = getStrategyConfig(tableNames);
        //全局變量配置
        GlobalConfig globalConfig = getGlobalConfig(serviceNameStartWithI);
        //包名配置
        PackageConfig packageConfig = getPackageConfig(packageName);
        //自動(dòng)生成
        atuoGenerator(dataSourceConfig, strategyConfig, globalConfig, packageConfig);
    }
    /**
     * 集成
     * @param dataSourceConfig 配置數(shù)據(jù)源
     * @param strategyConfig  策略配置
     * @param config      全局變量配置
     * @param packageConfig  包名配置
     * @author Terry
     */
    private void atuoGenerator(DataSourceConfig dataSourceConfig, StrategyConfig strategyConfig, GlobalConfig config, PackageConfig packageConfig) {
        new AutoGenerator()
                .setGlobalConfig(config)
                .setDataSource(dataSourceConfig)
                .setStrategy(strategyConfig)
                .setPackageInfo(packageConfig)
                .setTemplateEngine(new FreemarkerTemplateEngine())
                .execute();
    }
    /**
     * 設(shè)置包名
     * @param packageName 父路徑包名
     * @param packageName 模塊名
     * @return PackageConfig 包名配置
     * @author Terry
     */
    private PackageConfig getPackageConfig(String packageName) {
        return new PackageConfig()
                .setParent(packageName)
                .setXml("mapper.xml")
                .setMapper("mapper")
                .setController("controller")
                .setEntity("entity");
    }
    /**
     * 全局配置
     * @param serviceNameStartWithI false
     * @return GlobalConfig
     * @author Terry
     */
    private GlobalConfig getGlobalConfig(boolean serviceNameStartWithI) {
        GlobalConfig globalConfig = new GlobalConfig();
        globalConfig
                .setBaseColumnList(true)
                .setBaseResultMap(true)
                .setActiveRecord(false)
                //作者
                .setAuthor(author)
                //設(shè)置輸出路徑
                .setOutputDir(getOutputDir(projectName))
                .setFileOverride(true);
        if (!serviceNameStartWithI) {
            //設(shè)置service名
            globalConfig.setServiceName("%sService");
        }
        return globalConfig;
    }
    /**
     * 返回項(xiàng)目路徑
     * @param projectName 項(xiàng)目名
     * @return 項(xiàng)目路徑
     * @author Terry
     */
    private String getOutputDir(String projectName) {
//        String path = this.getClass().getClassLoader().getResource("").getPath();
//        int index = path.indexOf(projectName);
        return "E:/repository/git-repository/project/" + projectName + "/src/main/java/";
    }
    /**
     * 策略配置
     * @param tableNames 表名
     * @return StrategyConfig
     * @author Terry
     */
    private StrategyConfig getStrategyConfig(String... tableNames) {
        return new StrategyConfig()
                // 全局大寫命名 ORACLE 注意
                .setCapitalMode(true)
                //從數(shù)據(jù)庫(kù)表到文件的命名策略
                .setNaming(NamingStrategy.underline_to_camel)
                //需要生成的的表名，多個(gè)表名傳數(shù)組
                .setInclude(tableNames)
                //公共父類
                //.setSuperControllerClass(superControllerClass)
                //.setSuperEntityClass(superEntityClass)
                // 寫于父類中的公共字段
                //.setSuperEntityColumns("id")
                //使用lombok
                .setEntityLombokModel(true)
                //rest風(fēng)格
                .setRestControllerStyle(true);
    }
    /**
     * 配置數(shù)據(jù)源
     * @return 數(shù)據(jù)源配置 DataSourceConfig
     * @author Terry
     */
    private DataSourceConfig getDataSourceConfig() {
        return new DataSourceConfig().setDbType(dbType)
                .setUrl(dbUrl)
                .setUsername(userName)
                .setPassword(password)
                .setDriverName(driver);
    }
    /**
     * 根據(jù)表自動(dòng)生成
     * @param packageName 包名
     * @param tableNames 表名
     * @author Terry
     */
    @SuppressWarnings("unused")
    private void generateByTables(String packageName, String... tableNames) {
        generateByTables(true, packageName, tableNames);
    }
}