壓縮是一種通過特定的算法來減小計算機檔案大小的機制。這種機制是一種很方便的.發明，尤其是對網路使用者，因為它可以減小檔案的位元組總數，使檔案能夠通過較慢的網際網路連線實現更快傳輸，此外還可以減少檔案的磁碟佔用空間。下面小編準備了關於Java的壓縮與解壓縮ZIP，提供給大家參考!
壓縮的
import eredInputStream;
import eredOutputStream;
import ;
import InputStream;
import OutputStream;
import ntry;
import utputStream;
public class Zip {
static final int BUFFER = 2048;
public static void main(String argv[]) {
try {
BufferedInputStream origin = null;
FileOutputStream dest = new FileOutputStream("E:test");
ZipOutputStream out = new ZipOutputStream(new BufferedOutputStream(
dest));
byte data[] = new byte[BUFFER];
File f = new File("e:testa");
File files[] = Files();
for (int i = 0; i < th; i++) {
FileInputStream fi = new FileInputStream(files[i]);
origin = new BufferedInputStream(fi, BUFFER);
ZipEntry entry = new ZipEntry(files[i]ame());
extEntry(entry);
int count;
while ((count = (data, 0, BUFFER)) != -1) {
e(data, 0, count);
}
e();
}
e();
} catch (Exception e) {
tStackTrace();
}
}
}
解壓縮的
import eredInputStream;
import eredOutputStream;
import ;
import OutputStream;
import eration;
import ntry;
import ile;
public class UnZip {
static final int BUFFER = 2048;
public static void main(String argv[]) {
try {
String fileName = "E:test";
String filePath = "E:test";
ZipFile zipFile = new ZipFile(fileName);
Enumeration emu = ies();
int i=0;
while(oreElements()){
ZipEntry entry = (ZipEntry)Element();
//會把目錄作為一個file讀出一次，所以只建立目錄就可以，之下的檔案還會被迭代到。
if (rectory())
{
new File(filePath + ame())rs();
continue;
}
BufferedInputStream bis = new BufferedInputStream(nputStream(entry));
File file = new File(filePath + ame());
//加入這個的原因是zipfile讀取檔案是隨機讀取的，這就造成可能先讀取一個檔案
//而這個檔案所在的目錄還沒有出現過，所以要建出目錄來。
File parent = arentFile();
if(parent != null && (!ts())){
rs();
}
FileOutputStream fos = new FileOutputStream(file);
BufferedOutputStream bos = new BufferedOutputStream(fos,BUFFER);
int count;
byte data[] = new byte[BUFFER];
while ((count = (data, 0, BUFFER)) != -1)
{
e(data, 0, count);
}
h();
e();
e();
}
e();
} catch (Exception e) {
tStackTrace();
}
}
}
