java完成辦事器文件打包zip並下載的示例(邊打包邊下載)。本站提示廣大學習愛好者：（java完成辦事器文件打包zip並下載的示例(邊打包邊下載)）文章只能為提供參考，不一定能成為您想要的結果。以下是java完成辦事器文件打包zip並下載的示例(邊打包邊下載)正文
應用該辦法,可以即時打包文件,一邊打包一邊傳輸,不應用任何的緩存,讓用戶零期待!
/**
*
* mySocket 客戶端 Socket
* @param file 待打包的文件夾或文件
* @param fileName 打包下載的文件名
* @throws IOException
*/
private void down(File file, String fileName) throws IOException {
OutputStream outputStream = mySocket.getOutputStream();
StringBuffer sb = new StringBuffer("HTTP/1.1 200 OK\r\n");
sb.append("Server: java/1.1\r\n");
sb.append("Content-Type:application/octet-stream;charset=UTF-8\r\n");
//sb.append("User-Agent: Mozilla/4.0 (compatible;MSIE6.0;Windows NT 5.0)\r\n");
sb.append("Content-Disposition: attachment; filename=" + fileName
+ "\r\n");
sb.append("Transfer-Encoding: chunked\r\n");
sb.append("Connection: Keep-Alive\r\n\r\n");
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\r\n\r\n".getBytes());//Transfer-Encoding: chunked傳輸停止標志
outputStream.flush();
outputStream.close();
System.out.println("download stop");
try {
mySocket.close();
} catch (Throwable t) {
}
}
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 {
CheckedOutputStream cos = new CheckedOutputStream(outputStream,
new CRC32());
ZipOutputStream out = new ZipOutputStream(cos);
String basedir = "";
compress(file, out, basedir);
out.close();//必需封閉,如許才會寫入zip的停止信息,不然zip文件不完全.若想持續寫入,可重寫outputStream.close()辦法
} catch (Exception e) {
throw new RuntimeException(e);
}
}
private void compress(File file, ZipOutputStream out, String basedir) {
//斷定是目次照樣文件
if (file.isDirectory()) {
System.out.println("緊縮：" + basedir + file.getName());
this.compressDirectory(file, out, basedir);
} else {
System.out.println("緊縮：" + basedir + file.getName());
this.compressFile(file, out, basedir);
}
}
// 緊縮一個目次
private void compressDirectory(File dir, ZipOutputStream out, String basedir) {
if (!dir.exists())
return;
File[] files = dir.listFiles();
for (int i = 0; i < files.length; i++) {
/** 遞歸 */
compress(files[i], out, basedir + dir.getName() + "/");
}
}
//緊縮一個文件
private void compressFile(File file, ZipOutputStream out, String basedir) {
if (!file.exists()) {
return;
}
try {
BufferedInputStream bis = new BufferedInputStream(
new FileInputStream(file));
ZipEntry entry = new ZipEntry(basedir + file.getName());
out.putNextEntry(entry);
int count;
byte data[] = new byte[BUFFER];
while ((count = bis.read(data, 0, BUFFER)) != -1) {
out.write(data, 0, count);
}
bis.close();
} catch (Exception e) {
throw new RuntimeException(e);
}
}
}
package cn.liangjintang.webserver.zipFile;
import java.io.FilterOutputStream;
import java.io.IOException;
import java.io.OutputStream;
public class MyOutputStream extends FilterOutputStream {
public MyOutputStream(OutputStream out) {
super(out);
}
final byte[] oneBytes = "1\r\n".getBytes();
final byte[] rnBytes = "\r\n".getBytes();
public void write(int b) throws IOException {
out.write(oneBytes);//字節數1+CRLF
out.write(b);//數據實體
out.write(rnBytes);//CRLF
}
public void write(byte[] b) throws IOException {
out.write(Integer.toHexString(b.length).getBytes());//字節數,十六進制
out.write(rnBytes);//CRLF
out.write(b);//數據實體
out.write(rnBytes);//CRLF
}
public void write(byte[] b, int off, int len) throws IOException {
out.write(Integer.toHexString(len - off).getBytes());//字節數,十六進制
out.write(rnBytes);//CRLF
out.write(b, off, len);//數據實體
out.write(rnBytes);//CRLF
}
/**
* 重寫該辦法,不然OutputStream會被封閉,其他的數據<br/>
* (如Transfer-Encoding: chunked傳輸停止標志)就不克不及再持續寫入了
*/
public void close() throws IOException {
}
}
