java把多个文件压缩成压缩包，并且返回流 - 关心

/**
* 方法描述：测试类
* 备注: 
* 创建人: 
* 创建日期: 
*/

public class TestFileStream{

//文件和压缩包存储的位置

String tempFilePath="C:/temp/"

List<String> fileList=new ArrayList<String>();

fileList.add(tempFilePath+"file1.txt");

fileList.add(tempFilePath+"file2.png");

fileList.add(tempFilePath+"file3.xls");

//生成的压缩包名称

String zipName="fileData";

//返回流

ByteArrayOutputStream outputStream=fileToZip(fileList,fileData,tempFilePath);

//页面输入压缩包流

       byte[] buffer=outputStream.toByteArray();
        //清空response
        response.reset();
        //设置response的Header
        response.addHeader("Content-Disposition",
          "attachment;filename="+
          new String(("dataFile.zip").getBytes("gb2312"),"ISO8859-1"));
        response.addHeader("Content-Length", ""+outputStream.size());
        toClient=new BufferedOutputStream(response.getOutputStream());
        response.setContentType("application/octet-stream");
        toClient.write(buffer);
        toClient.flush();

}

/**
* 方法描述：将多个文件压缩成 zip包
* 备 注: 
* 创建 人: 
* 创建日期: 
* @param fileList
*/

public ByteArrayOutputStream fileToZip(List<String> fileList,String zipName,String tempFilePath){
 byte[] buffer=new byte[1024];
 ZipOutputStream out=null;
 try{
 out=new ZipOutputStream(new FileOutputStream(tempFilePath+zipName+".zip"));
 List<File> filedata=new ArrayList<File>();
 for(int i=0,len=fileList.size();i<len;i++ )
 {
 filedata.add(new File(fileList.get(i)));
 }

 for(int j=0,len=filedata.size();j<len;j++)
 {
 FileInputStream fis=new FileInputStream(filedata.get(j));
 out.putNextEntry(new ZipEntry(filedata.get(j).getName()));
 int dataLen;
 //读入需要下载的文件的内容，打包到zip文件
 while((dataLen=fis.read(buffer))>0){
 out.write(buffer,0,dataLen);

 }
 out.closeEntry();
 fis.close();

 }
 out.close();
 }
 catch(Exception ex)
 {
 ex.printStackTrace();
 }
 //读取压缩包
 File filezip=new File(tempFilePath+zipName+".zip");

 ByteArrayOutputStream baos=null;
 try
 {
 baos=new ByteArrayOutputStream();
 FileInputStream inStream=new FileInputStream(filezip);
 BufferedInputStream bis=new BufferedInputStream(inStream);
 int c=bis.read();
 while(c!=-1){
 baos.write(c);
 c=bis.read();
 }
 bis.close();
 inStream.close();
 }
 catch(Exception ex)
 {
 ex.printStackTrace();
 }
 return baos;

}