【java】mybatis-plus代码生成

正常的代码生成这里就不介绍了。旨在记录实现如下功能：

分布式微服务环境下，生成的entity、dto、vo、feignClient等等api模块，需要和mapper、service、controller等等分在不同的目录生成。

为什么会出现这个需求？
mybatis-plus（3.5.3.1）提供的全局配置：outputDir，该方法是entity、mapper、service、controller的文件输出目录。
如上，需要将entity和其他三个区分到不同的目录。
查看源码com.baomidou.mybatisplus.generator.engine.AbstractTemplateEngine

/*** 输出实体文件** @param tableInfo 表信息* @param objectMap 渲染数据* @since 3.5.0*/@Overrideprotected void outputEntity(TableInfo tableInfo, Map<String, Object> objectMap) {}/*** 输出Mapper文件(含xml)** @param tableInfo 表信息* @param objectMap 渲染数据* @since 3.5.0*/@Overrideprotected void outputMapper(TableInfo tableInfo, Map<String, Object> objectMap) {}/*** 输出service文件** @param tableInfo 表信息* @param objectMap 渲染数据* @since 3.5.0*/@Overrideprotected void outputService(TableInfo tableInfo, Map<String, Object> objectMap) {}/*** 输出controller文件** @param tableInfo 表信息* @param objectMap 渲染数据* @since 3.5.0*/@Overrideprotected void outputController(TableInfo tableInfo, Map<String, Object> objectMap) {}

一般都会集成自定义的文件生成，使用模板，一般的选择就是

上述的4个engine也就是继承了AbstractTemplateEngine，可根据自己选择的模板，再次集成，重写这4个方法：outputEntity outputMapper outputService outputController ，方法内部不需要执行相关代码， 输出的逻辑放在outputCustomFile方法内即可

源码：

@AllArgsConstructor
public class ByTemplateEngine extends BeetlTemplateEngine {private String apiOutputDir;private String serverOutputDir;@Overrideprotected void outputCustomFile(List<CustomFile> customFiles, TableInfo tableInfo, Map<String, Object> objectMap) {String packageName = String.valueOf(objectMap.get("packageName"));String entityName = String.valueOf(objectMap.get("entityName"));customFiles.forEach(customFile -> {String key = customFile.getFileName();String value = customFile.getTemplatePath();String outputPath = getPathInfo(OutputFile.parent);objectMap.put("entityKey", entityNameLower);if (StringUtil.equals(key, "controller.java")) {outputPath =serverOutputDir + StringPool.SLASH + packageName.replace(StringPool.DOT, StringPool.SLASH) + StringPool.SLASH +"controller" + StringPool.SLASH + entityName + "Controller" + StringPool.DOT_JAVA;}if (StringUtil.equals(key, "entity.java")) {outputPath = apiOutputDir + StringPool.SLASH + packageName.replace(StringPool.DOT, StringPool.SLASH) + StringPool.SLASH +"entity" + StringPool.SLASH + entityName + "Entity" + StringPool.DOT_JAVA;}if (StringUtil.equals(key, "mapper.java")) {outputPath =serverOutputDir + StringPool.SLASH + packageName.replace(StringPool.DOT, StringPool.SLASH) + StringPool.SLASH +"mapper" + StringPool.SLASH + entityName + "Mapper" + StringPool.DOT_JAVA;}if (StringUtil.equals(key, "mapper.xml")) {outputPath =serverOutputDir + StringPool.SLASH + packageName.replace(StringPool.DOT, StringPool.SLASH) + StringPool.SLASH +"mapper" + StringPool.SLASH + entityName + "Mapper" + StringPool.DOT_XML;}if (StringUtil.equals(key, "service.java")) {outputPath =serverOutputDir + StringPool.SLASH + packageName.replace(StringPool.DOT, StringPool.SLASH) + StringPool.SLASH +"service" + StringPool.SLASH + "I" + entityName + "Service" + StringPool.DOT_JAVA;}if (StringUtil.equals(key, "serviceImpl.java")) {outputPath =serverOutputDir + StringPool.SLASH + packageName.replace(StringPool.DOT, StringPool.SLASH) + StringPool.SLASH +"service" + StringPool.SLASH + "impl" + StringPool.SLASH + entityName + "ServiceImpl" + StringPool.DOT_JAVA;}if (StringUtil.equals(key, "entityVO.java")) {outputPath = apiOutputDir + StringPool.SLASH + packageName.replace(StringPool.DOT, StringPool.SLASH) + StringPool.SLASH +"vo" + StringPool.SLASH + entityName + "VO" + StringPool.DOT_JAVA;}if (StringUtil.equals(key, "entityDTO.java")) {outputPath = apiOutputDir + StringPool.SLASH + packageName.replace(StringPool.DOT, StringPool.SLASH) + StringPool.SLASH +"dto" + StringPool.SLASH + entityName + "DTO" + StringPool.DOT_JAVA;}if (StringUtil.equals(key, "entityExcel.java")) {outputPath = apiOutputDir + StringPool.SLASH + packageName.replace(StringPool.DOT, StringPool.SLASH) + StringPool.SLASH +"excel" + StringPool.SLASH + entityName + "Excel" + StringPool.DOT_JAVA;}if (StringUtil.equals(key, "wrapper.java")) {outputPath = apiOutputDir + StringPool.SLASH + packageName.replace(StringPool.DOT, StringPool.SLASH) + StringPool.SLASH +"wrapper" + StringPool.SLASH + entityName + "Wrapper" + StringPool.DOT_JAVA;}if (StringUtil.equals(key, "feign.java")) {outputPath = apiOutputDir + StringPool.SLASH + packageName.replace(StringPool.DOT, StringPool.SLASH) + StringPool.SLASH +"feign" + StringPool.SLASH + "I" + entityName + "Client" + StringPool.DOT_JAVA;}if (StringUtil.equals(key, "feignclient.java")) {outputPath =serverOutputDir + StringPool.SLASH + packageName.replace(StringPool.DOT, StringPool.SLASH) + StringPool.SLASH + "feign"+ StringPool.SLASH + entityName + "Client" + StringPool.DOT_JAVA;}if (StringUtil.equals(key, "feignclientFallback.java")) {outputPath = apiOutputDir + StringPool.SLASH + packageName.replace(StringPool.DOT, StringPool.SLASH) + StringPool.SLASH +"feign" + StringPool.SLASH + entityName + "ClientFallback" + StringPool.DOT_JAVA;}outputFile(new File(String.valueOf(outputPath)), objectMap, value, Boolean.TRUE);});}/*** 输出实体文件** @param tableInfo 表信息* @param objectMap 渲染数据* @since 3.5.0*/@Overrideprotected void outputEntity(TableInfo tableInfo, Map<String, Object> objectMap) {}/*** 输出Mapper文件(含xml)** @param tableInfo 表信息* @param objectMap 渲染数据* @since 3.5.0*/@Overrideprotected void outputMapper(TableInfo tableInfo, Map<String, Object> objectMap) {}/*** 输出service文件** @param tableInfo 表信息* @param objectMap 渲染数据* @since 3.5.0*/@Overrideprotected void outputService(TableInfo tableInfo, Map<String, Object> objectMap) {}/*** 输出controller文件** @param tableInfo 表信息* @param objectMap 渲染数据* @since 3.5.0*/@Overrideprotected void outputController(TableInfo tableInfo, Map<String, Object> objectMap) {}
}