利用Mybatis-plus来生成代码

主要说明一下注意的几个点：
一、引入依赖的类库

<dependency>
        <groupId>com.baomidou</groupId>
        <artifactId>mybatis-plus-generator</artifactId>
</dependency>

二、生成代码的一些方法

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 + "/core/src/main/java");
        gc.setAuthor("XXXX");
        gc.setOpen(false);
        gc.setControllerName("%sApi"); //其中%s是占位符
        mpg.setGlobalConfig(gc);

        // 数据源配置
        DataSourceConfig dsc = new DataSourceConfig();
        dsc.setUrl("jdbc:mysql://.....");
        // dsc.setSchemaName("public");
        dsc.setDriverName("com.mysql.cj.jdbc.Driver");
        dsc.setUsername("root");
        dsc.setPassword("123456");
        mpg.setDataSource(dsc);

        // 包配置
        PackageConfig pc = new PackageConfig();
        pc.setModuleName("user"); //设置整个模块的名字
        pc.setParent("com.xxx.autodao"); //这里设置的是所有自动生成的类所在的包名以及文件所在目录
        mpg.setPackageInfo(pc);

        // 自定义配置
        InjectionConfig cfg = new InjectionConfig() {
            @Override
            public void initMap() {
                // to do nothing
            }
        };

        String moduleName = "user";//这里是我自定义的一个变量，要传到模板方法里去
        Map<String,Object> params = new HashMap<>();
        params.put("module", moduleName); //加入到map里然后传进去
        cfg.setMap(params);
        
       //上面的设置就可以根据自带的模板来 生成相应的类和XML了
      // 下面的配置可以根据自己的需求，生成一些自定义模板的代码
        List<FileOutConfig> focList = new ArrayList<>();
        //我要生成一个自定义的mapper.xml
        focList.add(new FileOutConfig("/templates/mapper.xml.ftl") { //设置生成的模板

            @Override
            public String outputFile(TableInfo tableInfo) {
                // 自定义输入文件名称
                return projectPath + "/core/src/main/resources/mybatisplus/"//
                        + tableInfo.getEntityName() + "Mapper" + StringPool.DOT_XML; //配置生成的文件保存的目录
            }
        });
    
        //我要生成一个自定义的Controller
        focList.add(new FileOutConfig("/templates/t_controller.java.ftl") {

            @Override
            public String outputFile(TableInfo tableInfo) {
                // 自定义输入文件名称
                return projectPath + "/config-web/src/main/java/com/xxx/web/api/"//
                        + tableInfo.getEntityName() + "Api" + StringPool.DOT_JAVA;
            }
        });

        /***
         * 输出list.html 生成HTML
         */
        focList.add(new FileOutConfig("/templates/t_list.html.ftl") {

            @Override
            public String outputFile(TableInfo tableInfo) {
                // 自定义输入文件名称
                return projectPath + "/config-web/src//main/resources/static/pages/"//
                        + params.get("module") + "/list.html";
            }
        });
      

        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("表名"); //mysql里建的表名
//        strategy.setSuperEntityColumns("id");
        strategy.setControllerMappingHyphenStyle(true);
        strategy.setTablePrefix(pc.getModuleName() + "_");
        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();
    }

需要注意的点
1、关于模板去哪里找例子
模板可以先看看自带的例子，从自带的例子里改，一看就能明白
所有自带的模板都在类库的templates文件夹下

三、贴一下我写的Controller的模板

import ${package.Service}.${table.serviceName};
import ${package.Entity}.${entity};
import com.xxx.web.response.AjaxVoResult;
import com.xxx.response.EmServiceErrorCode;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.util.CollectionUtils;
import org.springframework.web.bind.annotation.*;

import javax.servlet.http.HttpServletRequest;
import java.time.LocalDateTime;
import java.util.List;

<#if restControllerStyle>
import org.springframework.web.bind.annotation.RestController;
<#else>
import org.springframework.stereotype.Controller;
</#if>
<#if superControllerClassPackage??>
import ${superControllerClassPackage};
</#if>

/**
 * <p>
 * ${table.comment!} 前端控制器
 * </p>
 *
 * @author ${author}
 * @since ${date}
 */
<#if restControllerStyle>
@RestController
<#else>
@Controller
</#if>
@RequestMapping("/api/${cfg.module}")
<#if kotlin>
class ${table.controllerName}<#if superControllerClass??> : ${superControllerClass}()</#if>
<#else>
<#if superControllerClass??>
public class ${table.controllerName} extends ${superControllerClass} {
<#else>
public class ${table.controllerName} extends BaseApi{
</#if>
    @Autowired
    ${table.serviceName} targetService;

    @RequestMapping("/list")
    public AjaxVoResult list(){
        QueryWrapper<${entity}> qw = new QueryWrapper<>();
        qw.setEntity(new ${entity}());
        qw.eq("yn", 1);
        List<${entity}> datas = targetService.list(qw);
        if (!CollectionUtils.isEmpty(datas)) {
            return new AjaxVoResult(EmServiceErrorCode.SUCCESS.getCode(), EmServiceErrorCode.SUCCESS.getMessage(), datas);
        }
        return new AjaxVoResult(EmServiceErrorCode.FAIL.getCode(), EmServiceErrorCode.FAIL.getMessage(), "");
    }

    @RequestMapping("/page")
    public AjaxVoResult page(){
        Page<${entity}> page = new Page<>(1, 5);
        QueryWrapper<${entity}> qw = new QueryWrapper<>();
        qw.setEntity(new ${entity}());
        qw.eq("yn", 1);
        IPage<${entity}> datas = targetService.page(page, qw);
        if (datas != null) {
            return new AjaxVoResult(EmServiceErrorCode.SUCCESS.getCode(), EmServiceErrorCode.SUCCESS.getMessage(), datas);
        }
        return new AjaxVoResult(EmServiceErrorCode.FAIL.getCode(), EmServiceErrorCode.FAIL.getMessage(), "");
    }

    @PostMapping("/add")
    public AjaxVoResult add(${entity} data,HttpServletRequest request){
        boolean  response = false;
        if(data != null){
            data.setCreateOperator(getErp(request));
            data.setUpdateOperator(getErp(request));
            data.setCreateTime(LocalDateTime.now());
            data.setUpdateTime(LocalDateTime.now());
            data.setYn(1);
            response = targetService.save(data);
        }

        if (response) {
            return new AjaxVoResult(EmServiceErrorCode.SUCCESS.getCode(), EmServiceErrorCode.SUCCESS.getMessage(), response);
        }
        return new AjaxVoResult(EmServiceErrorCode.FAIL.getCode(), EmServiceErrorCode.FAIL.getMessage(), null);
    }


    @RequestMapping("/update")
    public AjaxVoResult update(${entity} data,HttpServletRequest request){
        boolean  response = false;
        if(data != null){
            data.setUpdateOperator(getErp(request));
            data.setUpdateTime(LocalDateTime.now());
            response = targetService.updateById(data);
        }

        if (response) {
            return new AjaxVoResult(EmServiceErrorCode.SUCCESS.getCode(), EmServiceErrorCode.SUCCESS.getMessage(), response);
        }
        return new AjaxVoResult(EmServiceErrorCode.FAIL.getCode(), EmServiceErrorCode.FAIL.getMessage(), null);
    }


    @RequestMapping("/del")
    public AjaxVoResult del(${entity} data,HttpServletRequest request){
        boolean  response = false;
        if(data != null && data.getId() > 0){

            ${entity} params = new ${entity}();
            params.setId(data.getId());
            params.setYn(0);
            params.setUpdateOperator(getErp(request));
            params.setUpdateTime(LocalDateTime.now());
            response = targetService.updateById(params);
        }

        if (response) {
            return new AjaxVoResult(EmServiceErrorCode.SUCCESS.getCode(), EmServiceErrorCode.SUCCESS.getMessage(), response);
        }
        return new AjaxVoResult(EmServiceErrorCode.FAIL.getCode(), EmServiceErrorCode.FAIL.getMessage(), null);
    }
}
</#if>