export 接口支持断点续传

src/main/java/com/uas/report/controller/PrintController.java

@@ -1,10 +1,7 @@
 package com.uas.report.controller;
 
 import java.io.File;
-import java.io.FileInputStream;
 import java.io.IOException;
-import java.io.OutputStream;
-import java.net.URLEncoder;
 import java.sql.SQLException;
 import java.util.Date;
 import java.util.HashMap;
@@ -15,8 +12,6 @@ import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
 
 import org.dom4j.DocumentException;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Controller;
 import org.springframework.web.bind.annotation.RequestMapping;
@@ -53,8 +48,6 @@ public class PrintController {
 	@Autowired
 	private FileService fileService;
 
-	private static Logger logger = LoggerFactory.getLogger(PrintController.class);
-
 	/**
 	 * 为UAS系统打印提供服务， 根据printType进行预览、打印、下载pdf、下载纯数据excel等操作
 	 * 
@@ -156,8 +149,6 @@ public class PrintController {
 			exportFileType = ReportConstants.FILE_TYPE_PDF;
 		}
 
-		byte[] data = null;
-
 		String filePath = ReportConstants.GENERATED_FILES_PATH + reportName + "/"
 				+ fileService.generateFileName(userName, profile, whereCondition, otherParameters, exportFileType);
 		if (exportFileType.equals(ReportConstants.FILE_TYPE_EXCEL_DATA)) {
@@ -173,34 +164,24 @@ public class PrintController {
 			if (printService.overload(userName, profile, reportName, whereCondition, otherParameters, Platform.PC)) {
 				throw new IllegalStateException("数据量过大，无法提供服务");
 			}
-			data = printService.export(userName, profile, reportName, whereCondition, otherParameters, exportFileType);
+			byte[] data = printService.export(userName, profile, reportName, whereCondition, otherParameters,
+					exportFileType);
 			if (ArrayUtils.isEmpty(data)) {
 				throw new IllegalStateException("报表导出失败：" + userName + "/" + reportName + "\n");
 			}
 			FileUtils.write(file.getPath(), data);
-		} else {
-			data = FileUtils.readData(new FileInputStream(file));
 		}
 
-		try {
-			String exportFileName = title;
-			if (StringUtils.isEmpty(exportFileName)) {
-				exportFileName = reportName;
-			}
-			if (exportFileType.equals(ReportConstants.FILE_TYPE_EXCEL_DATA)) {
-				exportFileName += "." + ReportConstants.FILE_TYPE_EXCEL;
-			} else {
-				exportFileName += "." + exportFileType;
-			}
-			response.setHeader("Content-Disposition",
-					"attachment;filename=" + URLEncoder.encode(exportFileName, "UTF-8"));
-			OutputStream outputStream = response.getOutputStream();
-			outputStream.write(data);
-			outputStream.flush();
-			outputStream.close();
-		} catch (IOException e) {
-			logger.error("浏览器重复请求！");
+		String exportFileName = title;
+		if (StringUtils.isEmpty(exportFileName)) {
+			exportFileName = reportName;
+		}
+		if (exportFileType.equals(ReportConstants.FILE_TYPE_EXCEL_DATA)) {
+			exportFileName += "." + ReportConstants.FILE_TYPE_EXCEL;
+		} else {
+			exportFileName += "." + exportFileType;
 		}
+		fileService.rangeDownload(file, exportFileName, request, response);
 	}
 
 	/**