问题描述

java 实现生成txt压缩后返回客户端，不知道哪错了。生成的压缩文件都是损坏的

try {
OutputStream os = res.getOutputStream();
ByteArrayOutputStream baos = new ByteArrayOutputStream();
ZipOutputStream zipOut = new ZipOutputStream(baos);
ZipEntry entry = new ZipEntry("goods.txt");
zipOut.putNextEntry(entry);
zipOut.write(bytes, 0, bytes.length);

               res.reset();
               res.setContentType("application/OCTET-STREAM;charset=GBK");
               res.setHeader("pragma", "no-cache");
               res.addHeader("Content-Disposition", "attachment;filename=goods.zip");
               os.write(baos.toByteArray(), 0, baos.toByteArray().length);
               zipOut.flush();
               zipOut.closeEntry();
               baos.close();
               zipOut.close();
               os.close();
          } catch (Exception e) {
                logger.error(e,e);
            }

解决方案

请参看，希望对你有用
http://snowolf.iteye.com/blog/644591

解决方案二：

在os.close();之前添加os.flush();试一下呢

解决方案三：

有谁遇到过这种问题吗？

解决方案四：

不要沉了，有人会吗？

解决方案五：

我感觉是不是你的关闭顺序有问题啊。
FileOutputStream f=new FileOutputStream("text.zip");
CheckedOutputStream csum=new CheckedOutputStream(f,new Adler32());
ZipOutputStream zos=new ZipOutputStream(csum);
BufferedOutputStream out = new BufferedOutputStream(zos);
zos.setComment("A test of Java Ziping!");

BufferedReader in =new BufferedReader(new FileReader("123.txt"));
zos.putNextEntry(new ZipEntry("123.txt"));
int c;
while((c = in.read()) != -1){
out.write(c);
}
in.close();
out.flush();
out.close();
}

解决方案六：

问题已解决：

/**
* 压缩数据返回客户端
* @param req
* @param res
* @param bytes
* @throws Exception
*/
public static void zip(HttpServletRequest req, HttpServletResponse res,byte[] bytes) throws Exception {
ByteArrayInputStream bais = new ByteArrayInputStream(bytes);
ByteArrayOutputStream baos = new ByteArrayOutputStream();

        compress(bais, baos);
        OutputStream os = res.getOutputStream();
        res.reset();
        res.setContentType("application/zip");
        res.setHeader("pragma", "no-cache");
        res.addHeader("Content-Disposition", "attachment;filename=goods.zip");
        byte[] output = baos.toByteArray();  

        os.write(output, 0, output.length);

        baos.flush();
        baos.close();
        bais.close();
        os.close();
    }

     /**
     * 数据压缩
     *
     * @param is
     * @param os
     * @throws Exception
     */
    public static void compress(InputStream is, OutputStream os)
            throws Exception {  

        ZipOutputStream zipOut = new ZipOutputStream(os);
        ZipEntry entry = new ZipEntry("goods.txt");
        zipOut.putNextEntry(entry);

        int count;
        byte data[] = new byte[2048*2];
        while ((count = is.read(data, 0, data.length)) != -1) {
            zipOut.write(data, 0, count);
        }
        zipOut.closeEntry();
        zipOut.finish();
        zipOut.flush();
        zipOut.close();
    }