<!-- 模板引擎 -->
<dependency>
    <groupId>org.apache.velocity</groupId>
    <artifactId>velocity-engine-core</artifactId>
    <version>最新版本</version>
</dependency>

<!-- 模板引擎，需要指定 mpg.setTemplateEngine(new FreemarkerTemplateEngine()); -->
<dependency
 
>
    <groupId>org.freemarker</groupId>
    <artifactId>freemarker</artifactId>
    <version>最新版本</version>
</dependency>

<!-- MP 核心庫 -->
<dependency>
    <groupId>com.baomidou</groupId>
    <artifactId>mybatis-plus</artifactId
 
>
    <version>最新版本</version>
</dependency>

package com.management.manage;

import com.baomidou.mybatisplus.generator.AutoGenerator;
import com.baomidou.mybatisplus.generator.config.DataSourceConfig;
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.rules.DbType;
import com.baomidou.mybatisplus.generator.config.rules.NamingStrategy;
import com.management.manage.converts.OracleTypeConvert;
import org.junit.Test;

/**
 * <p>f
 * 測試生成代碼
 * </p>
 *
 * @author K神
 * @date 2017/12/18
 */
public class GeneratorServiceEntity {

    @Test
    public void generateCode() {
        String packageName = "com.baomidou.springboot";
        boolean serviceNameStartWithI = false;//user -> UserService, 設置成true: user -> IUserService
        generateByTables(serviceNameStartWithI, packageName, "POLICE_QA_QBANK");
    }

    private void generateByTables(boolean serviceNameStartWithI, String packageName, String... tableNames) {
        GlobalConfig config = new GlobalConfig();
        String dbUrl = "jdbc:oracle:thin:@101.37.149.47:11521:orcl";
        DataSourceConfig dataSourceConfig = new DataSourceConfig();
        dataSourceConfig.setDbType(DbType.ORACLE)
                .setUrl(dbUrl)
                .setUsername("js_gongan")
                .setPassword("HLKJ#jsga2018")
                .setTypeConvert(new OracleTypeConvert())//自定義數據庫類型轉換
                .setDriverName("oracle.jdbc.driver.OracleDriver");
        StrategyConfig strategyConfig = new StrategyConfig();
        strategyConfig
                .setCapitalMode(true)
                .setEntityLombokModel(false)
                .setDbColumnUnderline(false)
                .setNaming(NamingStrategy.underline_to_camel)
                .setRestControllerStyle(true)
                .entityTableFieldAnnotationEnable(true)//是否生成實體時，生成字段註解
                .setInclude(tableNames);//修改替換成你需要的表名，多個表名傳數組
        config.setActiveRecord(false)
                .setAuthor("趙炎")
                .setOutputDir("E:\\codeGen")
                .setFileOverride(true);
        if (!serviceNameStartWithI) {
            config.setServiceName("%sService");
        }
        new AutoGenerator().setGlobalConfig(config)
                .setDataSource(dataSourceConfig)
                .setStrategy(strategyConfig)
                .setPackageInfo(
                        new PackageConfig()
                                .setParent(packageName)
                                .setController("controller")
                                .setEntity("entity")
                ).execute();
    }

    private void generateByTables(String packageName, String... tableNames) {
        generateByTables(true, packageName, tableNames);
    }
}

package com.management.manage.converts;

import com.baomidou.mybatisplus.generator.config.ITypeConvert;
import com.baomidou.mybatisplus.generator.config.rules.DbColumnType;

//@Component
public class OracleTypeConvert implements ITypeConvert {
    @Override
    public DbColumnType processTypeConvert(String s) {
        String t = s.toUpperCase();
        if (t.contains("CHAR")) {
            return DbColumnType.STRING;
        } else if (t.contains("DATE") || t.contains("TIMESTAMP")) {
            return DbColumnType.DATE;
        } else if (t.contains("NUMBER")) {
            if (t.matches("NUMBER\\(+\\d\\)")) {
                return DbColumnType.INTEGER;
            } else if (t.matches("NUMBER\\(+\\d{2}+\\)")) {
                return DbColumnType.LONG;
            }
            return DbColumnType.INTEGER;
        } else if (t.contains("FLOAT")) {
            return DbColumnType.FLOAT;
        } else if (t.contains("clob")) {
            return DbColumnType.CLOB;
        } else if (t.contains("BLOB")) {
            return DbColumnType.OBJECT;
        } else if (t.contains("binary")) {
            return DbColumnType.BYTE_ARRAY;
        } else if (t.contains("RAW")) {
            return DbColumnType.BYTE_ARRAY;
        }
        return DbColumnType.STRING;
    }
}

package com.management.manage.common.handler;

import com.baomidou.mybatisplus.mapper.MetaObjectHandler;
import org.apache.ibatis.reflection.MetaObject;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.util.Date;
import java.util.Objects;

/**
 *  註入公共字段自動填充,任選註入方式即可
 */
//@Component
public class MyMetaObjectHandler extends MetaObjectHandler {

    protected final static Logger logger = LoggerFactory.getLogger(MyMetaObjectHandler.class);

    @Override
    public void insertFill(MetaObject metaObject) {
        Object isDelete = getFieldValByName("isdelete", metaObject);
        if(Objects.isNull(isDelete)){
            setFieldValByName("isdelete",0, metaObject);//mybatis-plus版本2.0.9+
        }
    }

    @Override
    public void updateFill(MetaObject metaObject) {
        logger.info("更新的時候幹點不可描述的事情");
        setFieldValByName("updatetime", new Date(), metaObject);
    }
}

mybatis plus 代碼生成器