java批量文件压缩导出下载到本地 Java 批量文件压缩导出并下载到本地代码实例

 @RequestMapping(value = "/exportAll",method = RequestMethod.GET)
  public void exportAll() throws IOException{
    try {
      HttpServletResponse response=this.getResponse();
      response.setContentType("application/octet-stream");
      String execlName = "报表";
      response.addHeader("Content-Disposition", "attachment;filename="+new String(execlName.getBytes(),"iso-8859-1") +".zip");
      OutputStream out = response.getOutputStream();
      testService.exportAll(out);
    } catch (Exception e) {
      ....
    }
  }

import java.io.OutputStream;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.tools.zip.ZipEntry;
import org.apache.tools.zip.ZipOutputStream;
import java.io.File;
import java.io.FileInputStream;
import javax.servlet.http.HttpServletRequest;
import org.apache.poi.hssf.usermodel.HSSFCellStyle;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.poifs.filesystem.POIFSFileSystem;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;
 public boolean exportAll(OutputStream out){
  ZipOutputStream zipStream = null;
  HSSFWorkbook wb = null;
  try{
    List<Test> datas = testService.getTestData();
    zipStream = new ZipOutputStream(out);//这里是把zip流输出到httpresponse流中
    for(int i=0;i<3;i++){
     wb = POIUtil.getWorkbook(i);//获取0,1,2.xls文件
     HSSFSheet sheet = wb.getSheetAt(0);
     testService.setSheet(sheet,datas);//...处理文件内容操作
     ZipEntry zipEntry = new ZipEntry(new String("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 (Exception e) {
      throw new SysException(ERRORConstants.COMMON_SYSTEM_ERROR, e);
    }finally {
       try {
        if(wb!=null){
           wb.close(); 
        }
        if(zipStream!=null){
          zipStream.close();
        }
        out.flush();
        out.close();
      } catch (IOException e) {
        throw new SysException(ERRORConstants.COMMON_CLOSE_ERROR, e);
      }
    }
  }     
　　public static HSSFWorkbook getWorkbook(String bh){
　　　　try {
　　　　　　String line = File.separator;
　　　　　　ServletRequestAttributes aRequestAttributes=(ServletRequestAttributes)RequestContextHolder.getRequestAttributes();
　　　　　　HttpServletRequest request =aRequestAttributes==null?null:aRequestAttributes.getRequest();
　　　　　　String webpath=request.getServletContext().getRealPath("/");
　　　　　　File file = new File(webpath+line+"excel"+line+bh+".xls");
　　　　　　POIFSFileSystem poifsFileSystem = new POIFSFileSystem(new FileInputStream(file));
　　　　　　HSSFWorkbook wb = new HSSFWorkbook(poifsFileSystem);
　　　　　　return wb;
　　　} catch (Exception e) {
　　　　　　throw new SysException(ERRORConstants.COMMON_SYSTEM_ERROR,e);
　　　}
　　}