java实现服务器文件打包zip并下载的示例(边打包边下载)
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2020-09-04
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java实现服务器文件打包实现服务器文件打包zip并下载的示例并下载的示例(边打包边下载边打包边下载)
主要介绍了java实现服务器文件打包zip并下载的示例，使用该方法,可以即时打包文件,一边打包一边传输,不使
用任何的缓存,让用户零等待,需要的朋友可以参考下
使用该方法,可以即时打包文件,一边打包一边传输,不使用任何的缓存,让用户零等待!
复制代码 代码如下:
/**
*
* mySocket 客户端 Socket
* @param file 待打包的文件夹或文件
* @param fileName 打包下载的文件名
* @throws IOException
*/
private void down(File file, String fileName) throws IOException {
OutputStream outputStream = mySocket.getOutputStream();
StringBuffer sb = new StringBuffer("HTTP/1.1 200 OK");
sb.append("Server: java/1.1");
sb.append("Content-Type:application/octet-stream;charset=UTF-8");
//sb.append("User-Agent: Mozilla/4.0 (compatible;MSIE6.0;Windows NT 5.0)");
sb.append("Content-Disposition: attachment; filename=" + fileName
+ "");
sb.append("Transfer-Encoding: chunked");
sb.append("Connection: Keep-Alive\r");
outputStream.write(sb.toString().getBytes());
outputStream.flush();
ZipCompressor zipCompressor = new ZipCompressor(new MyOutputStream(
outputStream));
zipCompressor.compress(file);
System.out.println("zip end");
System.out.println("write '0\r\n\r\n'");
outputStream.write("0".getBytes());//Transfer-Encoding: chunked传输结束标记
outputStream.flush();
outputStream.close();
System.out.println("download stop");
try {
mySocket.close();
} catch (Throwable t) {
}
}
复制代码 代码如下:
package cn.liangjintang.webserver.zipFile;
import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.OutputStream;
import java.lang.reflect.Field;
import java.util.zip.CRC32;
import java.util.zip.CheckedOutputStream;
import java.util.zip.ZipEntry;
import java.util.zip.ZipOutputStream;
public class ZipCompressor {
static final int BUFFER = 8192;
private OutputStream outputStream;
public ZipCompressor(MyOutputStream outputStream) {
this.outputStream=outputStream;
}
public void compress(File file) {
if (!file.exists())
throw new RuntimeException(file.getAbsolutePath() + "不存在！");
try {
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