java文件下载改名

Posted 2023-03-30

response.setHeader(arg0, arg1) 方法获取文件名，但是我想让下载下来的文件有一个统一的名字，比如 《点击下载》 下载下来一个 XXXXX.txt 文件 代码请详细些 谢谢~

参考技术A 要重新设置contentType，如application/octet-stream，再加一个filename
filename="XXXXX.txt";
response.setHeader("Content-Disposition", "attachment; filename="+filename); 参考技术B 用同一种方法保存文件名就行了
String name = "UUID.randomUUID() + "." + "txt"";
response.setHeader( "Content-disposition ", "attachment; filename="+name "); 参考技术C response.setHeader(
"Content-Disposition",
"inline; filename=\""
+ URLEncoder.encode(title, "UTF-8")
+ ".txt\""); 参考技术D //
// Source code recreated from a .class file by IntelliJ IDEA
// (powered by Fernflower decompiler)
//

package com.plocc.framework.utils;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.util.List;
import java.util.Map;
import org.apache.commons.lang3.StringUtils;
import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFCellStyle;
import org.apache.poi.hssf.usermodel.HSSFFont;
import org.apache.poi.hssf.usermodel.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.poifs.filesystem.POIFSFileSystem;

public class FileUtils extends org.apache.commons.io.FileUtils 
    public FileUtils() 
    

    public static String exportExcel(Map<String, Object> dataMap) throws Exception 
        HSSFWorkbook workbook = null;
        File fileOut;
        if (null != dataMap.get("tempPath")) 
            try 
                fileOut = new File((String)dataMap.get("tempPath"));
                POIFSFileSystem fs = new POIFSFileSystem(new FileInputStream(fileOut));
                workbook = new HSSFWorkbook(fs);
             catch (Exception var7) 
                var7.printStackTrace();
                throw new Exception("exportExcel---Excel导出出错：" + var7.getMessage());
            
         else 
            workbook = new HSSFWorkbook();
        

        try 
            createSheet(workbook, dataMap);
         catch (Exception var6) 
            var6.printStackTrace();
            throw new Exception("exportExcel---Excel导出出错：" + var6.getMessage());
        

        fileOut = null;
        String filePath = (String)dataMap.get("filePath");
        if (StringUtils.isEmpty(filePath)) 
            throw new Exception("exportExcel---Excel导出出错：无效文件路径！");
         else 
            try 
                FileOutputStream fileOut = new FileOutputStream(filePath);
                workbook.write(fileOut);
                fileOut.flush();
                fileOut.close();
                return filePath;
             catch (Exception var5) 
                fileOut.close();
                var5.printStackTrace();
                throw new Exception("exportExcel---Excel导出出错：" + var5.getMessage());
            
        
    

    private static void createSheet(HSSFWorkbook workbook, Map<String, Object> dataMap) throws Exception 
        HSSFSheet sheet = null;
        if (null != dataMap.get("tempPath")) 
            sheet = workbook.getSheetAt(0);
         else 
            String sheetName = "sheet1";
            if (null != dataMap.get("sheetName")) 
                sheetName = (String)dataMap.get("sheetName");
            

            sheet = workbook.createSheet(sheetName);
        

        HSSFFont font = workbook.createFont();
        font.setFontHeightInPoints((short)12);
        HSSFCellStyle styleHeader = workbook.createCellStyle();
        styleHeader.setAlignment((short)2);
        styleHeader.setFont(font);
        styleHeader.setFillForegroundColor((short)22);
        styleHeader.setFillPattern((short)1);
        styleHeader.setBorderTop((short)1);
        styleHeader.setBorderBottom((short)1);
        styleHeader.setBorderLeft((short)1);
        styleHeader.setBorderRight((short)1);
        HSSFCellStyle styleBody = workbook.createCellStyle();
        styleBody.setBorderTop((short)1);
        styleBody.setBorderBottom((short)1);
        styleBody.setBorderLeft((short)1);
        styleBody.setBorderRight((short)1);
        styleBody.setWrapText(true);
        HSSFRow row = null;
        HSSFCell cell = null;
        int titleRowNum = 0;
        int startRowNum = 0;
        if (null != dataMap.get("startRowNum")) 
            startRowNum = ((Integer)dataMap.get("startRowNum")).intValue() - 1;
        

        List<List<String>> dataTitle = (List)dataMap.get("dataTitle");
        int i;
        if (dataTitle != null && dataTitle.size() > 0) 
            titleRowNum = dataTitle.size();

            for(int i = 0; i < dataTitle.size(); ++i) 
                row = sheet.createRow(i + startRowNum);

                for(i = 0; i < ((List)dataTitle.get(i)).size(); ++i) 
                    cell = row.createCell(i);
                    cell.setCellValue((String)((List)dataTitle.get(i)).get(i));
                    cell.setCellStyle(styleHeader);
                    sheet.setColumnWidth(i, 6400);
                
            
        

        List<List<String>> dataBody = (List)dataMap.get("dataBody");
        if (dataBody != null && dataBody.size() > 0) 
            for(i = 0; i < dataBody.size(); ++i) 
                row = sheet.createRow(i + titleRowNum + startRowNum);
                if (dataBody.get(i) != null && ((List)dataBody.get(i)).size() > 0) 
                    for(int j = 0; j < ((List)dataBody.get(i)).size(); ++j) 
                        cell = row.createCell(j);
                        cell.setCellValue((String)((List)dataBody.get(i)).get(j));
                        cell.setCellStyle(styleBody);
                    
                
            
        

    



#------------------------------------

@SuppressWarnings("unchecked")
@RequestMapping("/exportDataFile")
public void exportDataFile(HttpServletRequest request, HttpServletResponse response, IbPlan ibPlan)
        throws Exception 
    Map<Long, BsMallEntity> mallMap = bsMallService.getAllBsMallMap(null);
    // 查询数据
    Paginator paginator = new Paginator();
    paginator.setItemsPerPage(Constants.DOWNLOAD_LIMIT);
    paginator.setParams(ibPlan);
    paginator = ibPlanService.getListBySelectivePage(paginator);
    List<IbPlan> ibPlanList = (List<IbPlan>) paginator.getResults();

    // 报表数据
    Map<String, Object> dataMap = new HashMap<String, Object>();
    // 文件路径
    dataMap.put("filePath", servletContext.getRealPath("/") + "merchantInfo" + "-"
            + DateUtil.formatDate(new Date(), "yyyyMMdd") + ".xls");
    // 模板路径
    // dataMap.put("tempPath", servletContext.getRealPath("/") +
    // "excelTemplate/InfoTemplate.xls");
    // dataMap.put("startRowNum", 3);
    // 表单名
    dataMap.put("sheetName", "招商信息");
    // 标题部分
    List<List<String>> dataTitle = new ArrayList<List<String>>();
    List<String> title = new ArrayList<String>();
    title.add("品牌");
    title.add("项目");
    title.add("当前进度");
    title.add("商务网批");
    title.add("招商人员");
    title.add("更新时间");
    title.add("最新留言/备注");
    dataTitle.add(title);
    dataMap.put("dataTitle", dataTitle);
    // 数据部分
    List<List<String>> dataBody = new ArrayList<List<String>>();
    List<String> body = null;
    for (IbPlan entity : ibPlanList) 
        body = new ArrayList<String>();
        // 品牌
        body.add(entity.getBrandName());
        // 项目
        if (null != mallMap.get(entity.getMallId())) 
            body.add(mallMap.get(entity.getMallId()).getMallName());
         else 
            body.add("");
        
        // 当前进度
        body.add(MerchantProgressEnum.getMap().get(entity.getStatus()));
        // 商务网批
        if (null != entity.getProgressList() && entity.getProgressList().size() >= 3) 
            body.add(entity.getProgressList().get(2).getNetcommentNo());
         else 
            body.add("");
        
        // 招商人员
        body.add(entity.getManagerName());
        // 更新时间
        body.add(DateUtils.format(entity.getUpdatedDate(), "yyyy-MM-dd"));
        // 最新留言/备注
        body.add(entity.getContent());
        dataBody.add(body);
    
    dataMap.put("dataBody", dataBody);
    // 报表导出
    try 
        String filePath = FileUtils.exportExcel(dataMap);
        // 获取文件
        File file = new File(filePath);
        // 取得文件名
        String filename = file.getName();
        // 以流的形式下载文件
        InputStream fis = new BufferedInputStream(new FileInputStream(filePath));
        byte[] buffer = new byte[fis.available()];
        fis.read(buffer);
        fis.close();
        // 设置response的Header
        response.addHeader("Content-Disposition", "attachment;filename=" + new String(filename.getBytes()));
        response.addHeader("Content-Length", "" + file.length());
        response.setContentType("application/octet-stream;charset=UTF-8");
        OutputStream output = response.getOutputStream();
        output.write(buffer);
        output.flush();
     catch (Exception e) 
        e.printStackTrace();
        logger.error("getDataFile---Excel导出出错-----" + e.getMessage());