Java 批量文件压缩导出并下载到本地示例代码
主要用的是org.apache.tools.zip.ZipOutputStream 这个zip流，这里以Execl为例子。
思路首先把zip流写入到http响应输出流中，再把excel的流写入zip流中（这里可以不用生成文件再打包，只需把execl模板读出写好数据输出到zip流中，并为每次的流设置文件名）
例如：在项目webapp下execl文件中存在1.xls，2.xls，3.xls文件
1.Controller
@RequestMapping(value="/exportAll",method=RequestMethod.GET)
publicvoidexportAll()throwsIOException{
try{
HttpServletResponseresponse=this.getResponse();
response.setContentType("application/octet-stream");
StringexeclName="报表";
response.addHeader("Content-Disposition","attachment;filename="+newString(execlName.getBytes(),"iso-8859-1")+".zip");
OutputStreamout=response.getOutputStream();
testService.exportAll(out);
}catch(Exceptione){
....
}
}
2.Service
importjava.io.OutputStream;
importorg.apache.poi.hssf.usermodel.HSSFSheet;
importorg.apache.poi.hssf.usermodel.HSSFWorkbook;
importorg.apache.tools.zip.ZipEntry;
importorg.apache.tools.zip.ZipOutputStream;
importjava.io.File;
importjava.io.FileInputStream;
importjavax.servlet.http.HttpServletRequest;
importorg.apache.poi.hssf.usermodel.HSSFCellStyle;
importorg.apache.poi.hssf.usermodel.HSSFSheet;
importorg.apache.poi.hssf.usermodel.HSSFWorkbook;
importorg.apache.poi.poifs.filesystem.POIFSFileSystem;
importorg.springframework.web.context.request.RequestContextHolder;
importorg.springframework.web.context.request.ServletRequestAttributes;
publicbooleanexportAll(OutputStreamout){
ZipOutputStreamzipStream=null;
HSSFWorkbookwb=null;
try{
Listdatas=testService.getTestData();
zipStream=newZipOutputStream(out);//这里是把zip流输出到httpresponse流中
for(inti=0;i<3;i++){
wb=POIUtil.getWorkbook(i);//获取0,1,2.xls文件
HSSFSheetsheet=wb.getSheetAt(0);
testService.setSheet(sheet,datas);//...处理文件内容操作
ZipEntryzipEntry=newZipEntry(newString("文件名XXX".getBytes(),"utf-8")+".xls");//自己命名，这里假设是1,2,3
zipStream.putNextEntry(zipEntry);
wb.write(zipStream);//这里就是循环每次把execl写入zip包中
zipStream.flush();
}
}catch(Exceptione){
thrownewSysException(ERRORConstants.COMMON_SYSTEM_ERROR,e);
}finally{
try{
if(wb!=null){
wb.close();
}
if(zipStream!=null){
zipStream.close();
}
out.flush();
out.close();
}catch(IOExceptione){
thrownewSysException(ERRORConstants.COMMON_CLOSE_ERROR,e);
}
}
}
publicstaticHSSFWorkbookgetWorkbook(Stringbh){
try{
Stringline=File.separator;
ServletRequestAttributesaRequestAttributes=(ServletRequestAttributes)RequestContextHolder.getRequestAttributes();
HttpServletRequestrequest=aRequestAttributes==null?null:aRequestAttributes.getRequest();
Stringwebpath=request.getServletContext().getRealPath("/");
Filefile=newFile(webpath+line+"excel"+line+bh+".xls");
POIFSFileSystempoifsFileSystem=newPOIFSFileSystem(newFileInputStream(file));
HSSFWorkbookwb=newHSSFWorkbook(poifsFileSystem);
returnwb;
}catch(Exceptione){
thrownewSysException(ERRORConstants.COMMON_SYSTEM_ERROR,e);
}
}
最后的结果生成一个报表.zip，其中包含3个文件1.xls,2.xls,3.xls
总结
以上所述是小编给大家介绍的Java批量文件压缩导出并下载到本地示例代码，希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对毛票票网站的支持！