流程
原來寫過一篇文章,是介紹EasyExcel的,但是現在有些業務需要解決,流程如下
1.需要把匯出條件轉換成中文並存入資料庫
2.需要分頁匯出
3.需要上傳FTP或者以後上傳OSS
解決方案
大體的流程採用摸板方法模式,這樣簡化條件轉換以及上傳FTP操作
public abstract class EasyExcelUtil {
private final Logger logger = LoggerFactory.getLogger(this.getClass());
private final CloudOrderManagementDao cloudOrderManagementDao;
//上下文物件
private final ExportDTO dto;
//ftp資訊
private final FileClient fileClient;
protected final RedisUtil redisUtil;
private static final ThreadPoolExecutor threadPoolExecutor = new ThreadPoolExecutor(10, 30,
60L, TimeUnit.SECONDS, new ArrayBlockingQueue<>(100));;
/**
* 構造方法子類必須實現
*
* @param cloudOrderManagementDao dao
* @param dto 上下文物件
* @param fileClient 檔案上傳物件
* @param redisUtil redis
*/
public EasyExcelUtil(CloudOrderManagementDao cloudOrderManagementDao, ExportDTO dto, FileClient fileClient, RedisUtil redisUtil) {
this.cloudOrderManagementDao = cloudOrderManagementDao;
this.dto = dto;
this.fileClient = fileClient;
this.redisUtil = redisUtil;
}
/**
* 主方法
*/
public final void createExcel() {
try {
File file = this.createFile();
CloudExportInfo exportInfo = this.createExportInfo(file.getName());
threadPoolExecutor.execute(() -> {
this.easyCreate(file);
this.uploadFile(file);
updateExportInfo(exportInfo);
});
} catch (Exception e) {
logger.error("ExcelUtil error{}", e);
}
}
/**
* 建立檔案
*
* @return 檔案物件
* @throws IOException
*/
private File createFile() throws IOException {
File temp = File.createTempFile("temp", ".xlsx");
logger.info("ExcelUtil建立檔案成功{}", temp.getAbsolutePath());
return temp;
}
/**
* 建立匯出物件,並存資料庫
*
* @param fileName 檔名
* @return 匯出物件
*/
private CloudExportInfo createExportInfo(String fileName) {
CloudExportInfo exportInfo = new CloudExportInfo();
exportInfo.setId(dto.getUuid());
exportInfo.setUserId(dto.getUserId());
exportInfo.setCreateBy(dto.getUserName());
exportInfo.setExportStatus(com.blgroup.vision.common.utils.R.CloudConstant.TWO);
exportInfo.setExportType(dto.getExportType());
exportInfo.setQueryParam(this.transitionQuery());
exportInfo.setExportCount(dto.getTotal());
exportInfo.setFileName(fileName);
exportInfo.setExportDir(dto.getBasisDir() + File.separator + fileName);
cloudOrderManagementDao.saveExportInfo(exportInfo);// 初始化匯出資訊
redisUtil.set(R.CloudConstant.CLOUD_DOWNLOAD_PROGRESS + "_" + dto.getUuid(), "5", 60 * 5);
logger.info("ExcelUtil建立匯出資訊成功{}", JSON.toJSONString(exportInfo));
return exportInfo;
}
/**
* 上傳檔案
*
* @param file 檔案,策略模式 未來可能支援OSS
*/
private void uploadFile(File file) {
redisUtil.set(R.CloudConstant.CLOUD_DOWNLOAD_PROGRESS + "_" + dto.getUuid(), "95", 60 * 5);
fileClient.uploadFile(file, dto.getBasisDir());
redisUtil.set(R.CloudConstant.CLOUD_DOWNLOAD_PROGRESS + "_" + dto.getUuid(), "100", 60 * 5);
}
/**
* 上傳完成,更新匯出物件
*
* @param exportInfo
* @return
*/
private CloudExportInfo updateExportInfo(CloudExportInfo exportInfo) {
exportInfo.setExportStatus(com.blgroup.vision.common.utils.R.CloudConstant.ONE);
cloudOrderManagementDao.saveExportInfo(exportInfo);// 初始化匯出資訊
logger.info("ExcelUtil上完成");
return exportInfo;
}
/**
* 匯出方法,可以實現分批匯出,也可以一次性匯出
*
* @param file 檔案
*/
public abstract void easyCreate(File file);
/**
* 對查詢欄位進行轉換
* @return
*/
public abstract String transitionQuery();
}
這樣子類只需要實現easyCreate
和transitionQuery
方法即可
查詢條件轉換
針對查詢條件轉換,例如QO欄位為'merchantId' 需要轉換為商戶
值需要轉換為ID對應的商戶名稱
如果是每個匯出方法寫一段轉換類太麻煩這裡使用註解的方式
在屬性上使用表明中文意思和轉換方法
@Target({ElementType.FIELD})
@Retention(RetentionPolicy.RUNTIME)
@Inherited
@Documented
public @interface FieldNameTransition {
/**
* 中文名稱
* @return
*/
String value();
String transitionMethod() default "";
}
指定轉換類
@Target({ElementType.TYPE})
@Retention(RetentionPolicy.RUNTIME)
@Inherited
@Documented
/**
* 指定轉換類
*/
public @interface TransitionClass {
Class<?> value();
}
通過反射進行轉換
public class ExcelTransitionFieldUtil {
public static Logger logger = LoggerFactory.getLogger(ExcelTransitionFieldUtil.class);
private final ApplicationContext applicationContext;
public ExcelTransitionFieldUtil(ApplicationContext applicationContext) {
this.applicationContext = applicationContext;
}
public String transition(Object object) {
List<Map<String, String>> resultList = new ArrayList<>();
Object transitionBean = null;
//獲取傳過來的物件
Class<?> dtoClass = object.getClass();
if (dtoClass.isAnnotationPresent(TransitionClass.class)) {
//獲取類上的註解,得到轉換類 獲取spring ioc中轉換類的物件
transitionBean = applicationContext.getBean(dtoClass.getAnnotation(TransitionClass.class).value());
}
//獲取物件的全部欄位
Field[] fields = dtoClass.getDeclaredFields();
for (Field field : fields) {
if (field.isAnnotationPresent(FieldNameTransition.class)) {
field.setAccessible(true);
//獲取欄位中需要轉換的註解
try {
if (field.get(object) != null && StringUtils.isNotBlank(field.get(object).toString())) {
FieldNameTransition fieldAnnotation = field.getAnnotation(FieldNameTransition.class);
Map<String, String> tempMap = new HashMap<>();
tempMap.put("name", fieldAnnotation.value());
//如果定義了轉換方法
if (StringUtils.isNotBlank(fieldAnnotation.transitionMethod()) && transitionBean != null) {
Method method = transitionBean.getClass().getMethod(fieldAnnotation.transitionMethod(), dtoClass);
Object invoke = method.invoke(transitionBean, object);
tempMap.put("value", invoke.toString());
} else {
tempMap.put("value", field.get(object).toString());
}
resultList.add(tempMap);
}
}catch (Exception e){
logger.error("反射轉換髮生異常 {}", e);
}
}
}
return JSON.toJSONString(resultList);
}
}
使用
QueryMerchantExportQO queryDTO = QueryMerchantExportQO.builder()
.isNeedAudit(request.getParameter("isNeedAudit"))
.keyword(request.getParameter("keyword"))
.merchantType(request.getParameter("merchantType"))
.shopId(request.getParameter("shopId"))
.storeCode(request.getParameter("storeCode"))
.storeType(request.getParameter("storeType"))
.hideFlag(request.getParameter("hideFlag")).build();
ExportDTO exportDTO = ExportDTO.builder().userId(UserUtils.getUser().getId())
.userName(UserUtils.getUser().getName())
.exportType("9")
.uuid(UUID.randomUUID().toString())
.basisDir("/cloudDownFile" + File.separator + LocalDate.now().getYear() + File.separator + LocalDate.now().getMonth().getValue())
.total(Integer.valueOf(request.getParameter("total")))
.build();
FtpInfo ftpInfo = new FtpInfo(server, uname, pwd, port);
new EasyExcelUtil(cloudOrderManagementDao, exportDTO, new FtpFileClient(ftpInfo), redisUtil) {
@Override
public void easyCreate(File file) {
//do something
}
@Override
public String transitionQuery() {
//轉換
return new ExcelTransitionFieldUtil(applicationContext).transition(queryDTO);
}
}.createExcel();
}
結尾
現在問題是轉換型別只能是String型別,以後可能改進