没有理由不根据自己的项目编写一套适合自己项目的代码生成工具，不是吗？

思路: 首先根据自己的项目情况，定义好代码模板与占位参数，生成的时候只需要将参数填进去，再在指定的位置生成相应的.java/.xml等文件即可

使用freemarker模板引擎 compile 'org.freemarker:freemarker:2.3.23'

# 核心源源码

package com.futao.springbootdemo.utils.generator;

import com.futao.springbootdemo.foundation.ApplicationException;
import com.futao.springbootdemo.utils.DateTools;
import freemarker.template.Configuration;
import freemarker.template.Template;
import freemarker.template.TemplateException;
import freemarker.template.TemplateExceptionHandler;
import org.apache.commons.lang3.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;

/**
 * 代码生成器
 *
 * @author futao
 * Created on 2019-03-08.
 */
public class CodeGeneratorManager {

    private static final Logger LOGGER = LoggerFactory.getLogger(CodeGeneratorManager.class);
    /**
     * 项目基础路径
     */
    private static final String PROJECT_BASE_PATH = System.getProperty("user.dir") + "/src/main/java/com/futao/springbootdemo";
    /**
     * 模板文件路径
     */
    private static final String TEMPLATE_FILE_PATH = PROJECT_BASE_PATH + "/utils/generator/template";
    /**
     * Entity生成路径
     */
    private static final String ENTITY_PATH = PROJECT_BASE_PATH + "/model/entity";
    /**
     * Controller路径
     */
    private static final String CONTROLLER_PATH = PROJECT_BASE_PATH + "/controller/business";
    /**
     * Service实现类生成路径
     */
    private static final String SERVICE_IMPL_PATH = PROJECT_BASE_PATH + "/service/impl";
    /**
     * Service接口生成路径
     */
    private static final String SERVICE_FACE_PATH = PROJECT_BASE_PATH + "/service";
    /**
     * Dao Mapper路径
     */
    private static final String DAO_PATH = PROJECT_BASE_PATH + "/dao";
    /**
     * Mybatis mapper xml文件路径
     */
    private static final String MYBATIS_MAPPER_XML_PATH = System.getProperty("user.dir") + "/src/main/resources/mybatis/mapper";


    private static Configuration configuration = null;

    private CodeGeneratorManager() {
    }

    /**
     * Freemarker 模板环境配置
     *
     * @return
     * @throws IOException
     */
    private Configuration initFreemarkerConfiguration() {
        Configuration cfg;
        try {
            cfg = new Configuration(Configuration.VERSION_2_3_23);
            cfg.setDirectoryForTemplateLoading(new File(TEMPLATE_FILE_PATH));
            cfg.setDefaultEncoding("UTF-8");
            cfg.setTemplateExceptionHandler(TemplateExceptionHandler.IGNORE_HANDLER);
        } catch (IOException e) {
            throw new RuntimeException("Freemarker 模板环境初始化异常!", e);
        }
        return cfg;
    }

    /**
     * 获取模板文件
     *
     * @return
     */
    private Template getTemplate(String templateName) {
        if (configuration == null) {
            configuration = initFreemarkerConfiguration();
        }
        try {
            return configuration.getTemplate(templateName);
        } catch (IOException e) {
            e.printStackTrace();
            throw ApplicationException.ae(e.getMessage());
        }
    }

    /**
     * 生成代码
     *
     * @param args
     */
    public static void main(String[] args) {
        CodeGeneratorManager codeGeneratorManager = new CodeGeneratorManager();

        Map<String, Object> dataMap = new HashMap<>(6);
        dataMap.put("className", "Address");
        dataMap.put("classDesc", "地址");
        dataMap.put("createDate", DateTools.dateToString(new Date(), DateTools.yyyyMMdd));
        dataMap.put("controllerPackagePath", getPackagePath(CONTROLLER_PATH));
        dataMap.put("entityPackagePath", getPackagePath(ENTITY_PATH));
        dataMap.put("serviceFacePackagePath", getPackagePath(SERVICE_FACE_PATH));
        dataMap.put("serviceImplPackagePath", getPackagePath(SERVICE_IMPL_PATH));
        dataMap.put("daoPackagePath", getPackagePath(DAO_PATH));

        Template entityTemplate = codeGeneratorManager.getTemplate("EntityTemplate.ftl");
        Template controllerTemplate = codeGeneratorManager.getTemplate("ControllerTemplate.ftl");
        Template serviceFaceTemplate = codeGeneratorManager.getTemplate("ServiceFaceTemplate.ftl");
        Template serviceImplTemplate = codeGeneratorManager.getTemplate("ServiceImplTemplate.ftl");
        Template daoTemplate = codeGeneratorManager.getTemplate("DaoTemplate.ftl");
        Template mapperTemplate = codeGeneratorManager.getTemplate("MapperTemplate.ftl");

        File entityFile = new File(ENTITY_PATH + "/" + dataMap.get("className") + ".java");
        File controllerFile = new File(CONTROLLER_PATH + "/" + dataMap.get("className") + "Controller.java");
        File serviceFaceFile = new File(SERVICE_FACE_PATH + "/" + dataMap.get("className") + "Service.java");
        File serviceImplFile = new File(SERVICE_IMPL_PATH + "/" + dataMap.get("className") + "ServiceImpl.java");
        File daoFile = new File(DAO_PATH + "/" + dataMap.get("className") + "Dao.java");
        File mapperFile = new File(MYBATIS_MAPPER_XML_PATH + "/" + dataMap.get("className") + "Mapper.xml");


        try {
            entityTemplate.process(dataMap, new FileWriter(entityFile));
            System.out.println(">>>> 实体类【" + dataMap.get("className") + "】生成成功");
            controllerTemplate.process(dataMap, new FileWriter(controllerFile));
            System.out.println(">>>> 控制器类【" + dataMap.get("className") + "Controller】生成成功");
            serviceFaceTemplate.process(dataMap, new FileWriter(serviceFaceFile));
            System.out.println(">>>> Service接口【" + dataMap.get("className") + "Service】生成成功");

            serviceImplTemplate.process(dataMap, new FileWriter(serviceImplFile));
            System.out.println(">>>> Service实现类【" + dataMap.get("className") + "ServiceImpl】生成成功");

            daoTemplate.process(dataMap, new FileWriter(daoFile));
            System.out.println(">>>> Dao接口【" + dataMap.get("className") + "Dao】生成成功");

            mapperTemplate.process(dataMap, new FileWriter(mapperFile));
            System.out.println(">>>> Mapper文件【" + dataMap.get("className") + "Mapper】生成成功");

            System.out.println(StringUtils.repeat("=", 20) + "执行完毕" + StringUtils.repeat("=", 20));
        } catch (TemplateException | IOException e) {
            e.printStackTrace();
        }
    }


    /**
     * 根据文件系统路径获取包路径
     *
     * @param fileSysPath 文件系统路径
     * @return
     */
    private static String getPackagePath(String fileSysPath) {
        return fileSysPath.substring(fileSysPath.indexOf("com")).replace("/", ".");
    }

}

# 代码模板(只贴出两个示例)

• Controller.java

package ${controllerPackagePath};

import ${entityPackagePath}.${className};
import ${serviceFacePackagePath}.${className}Service;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import org.springframework.http.MediaType;
import org.springframework.web.bind.annotation.*;

import javax.annotation.Resource;
import java.util.List;

/**
* ${classDesc}操作接口
*
* @author futao
* Created on ${createDate}.
*/
@Api("${classDesc}")
@RestController
@RequestMapping(path = "${className?lower_case}", produces = MediaType.APPLICATION_JSON_UTF8_VALUE)
public class ${className}Controller {
    @Resource
    private ${className}Service ${className?lower_case}Service;

    /**
    * 新增${classDesc}
    *
    * @return
    */
    @ApiOperation("新增${classDesc}")
    @PostMapping(path = "add")
    public ${className} add(
    ) {
    return ${className?lower_case}Service.add();
    }

    /**
    * 删除${classDesc}
    *
    * @param id 要删除的${classDesc}的id
    * @return
    */
    @DeleteMapping("{id}")
    public ${className} delete(
        @PathVariable("id") String id
    ) {
    return ${className?lower_case}Service.delete(id);
    }

    /**
    * 更新${classDesc}
    *
    * @param id 要更新的${classDesc}的id
    * @return
    */
    @PutMapping("{id}")
    public ${className} update(
        @PathVariable("id") String id
    ) {
        return ${className?lower_case}Service.update(id);
    }


    /**
    * 查询${classDesc}列表
    *
    * @return
    */
    @GetMapping("list")
    public List<${className}> list() {
        return ${className?lower_case}Service.list();
    }

    /**
    * 获取${classDesc}详情
    *
    * @param id ${classDesc}id
    * @return
    */
    @GetMapping("{id}")
    public ${className} byId(@PathVariable("id") String id) {
        return ${className?lower_case}Service.byId(id);
    }
}

• Mapper.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="${daoPackagePath}.${className}Dao">

    <!--配置一个LRU缓存（二级缓存），每隔60秒进行刷新，存储512个对象-->
    <!--
        LRU     最近最少使用策略，移除最长时间不被使用的对象
        FIFO    先进先出策略
        SOFT    软引用策略，移除基于垃圾回收器状态和软引用规则的对象
        WEAK    弱引用策略，更积极地移除基于垃圾回收器状态和软引用规则的对象
    -->
    <cache eviction="LRU" flushInterval="60000" size="512" readOnly="true"/>

    <insert id="add" parameterType="${className?lower_case}">
        insert
        into springmvcdemo.futao_${className?lower_case} ()
        values ();
    </insert>

    <delete id="delete" parameterType="string">
        delete
        from springmvcdemo.futao_${className?lower_case}
        where id = ${r"#{id}"}
    </delete>

    <update id="update" parameterType="${className?lower_case}">
        update springmvcdemo.futao_${className?lower_case}
        set
        where id = ${r"#{id}"}
    </update>

    <select id="list">
        select *
        from springmvcdemo.futao_${className?lower_case}
    </select>

    <select id="byId" parameterType="string">
        select *
        from springmvcdemo.futao_${className?lower_case}
        where id = ${r"#{id}"}
    </select>
</mapper>

根据自己的项目情况创建模板即可，比如我就创建了6个

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# 使用

直接执行 CodeGeneratorManager#main 方法即可

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• 效果

  
  
  image.png
  
  
  image.png

无解~
快乐~

源代码: https://github.com/FutaoSmile/springbootFramework

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我在这里等你:

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