Java實作zip檔案壓縮(單個檔案、檔案夾以及檔案和檔案夾的組合壓縮)
package com.ljheee.ziptool.core;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.zip.ZipEntry;
import java.util.zip.ZipOutputStream;
/**
* 壓縮算法類
* 實作檔案壓縮,檔案夾壓縮,以及檔案和檔案夾的混合壓縮
* @author ljheee
*
*/
public class CompactAlgorithm {
/**
* 完成的結果檔案--輸出的壓縮檔案
*/
File targetFile;
public CompactAlgorithm() {}
public CompactAlgorithm(File target) {
targetFile = target;
if (targetFile.exists())
targetFile.delete();
}
/**
* 壓縮檔案
*
* @param srcfile
*/
public void zipFiles(File srcfile) {
ZipOutputStream out = null;
try {
out = new ZipOutputStream(new FileOutputStream(targetFile));
if(srcfile.isFile()){
zipFile(srcfile, out, "");
} else{
File[] list = srcfile.listFiles();
for (int i = 0; i < list.length; i++) {
compress(list[i], out, "");
}
}
System.out.println("壓縮完畢");
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
if (out != null)
out.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
/**
* 壓縮檔案夾裡的檔案
* 起初不知道是檔案還是檔案夾--- 統一調用該方法
* @param file
* @param out
* @param basedir
*/
private void compress(File file, ZipOutputStream out, String basedir) {
/* 判斷是目錄還是檔案 */
if (file.isDirectory()) {
this.zipDirectory(file, out, basedir);
} else {
this.zipFile(file, out, basedir);
}
}
/**
* 壓縮單個檔案
*
* @param srcfile
*/
public void zipFile(File srcfile, ZipOutputStream out, String basedir) {
if (!srcfile.exists())
return;
byte[] buf = new byte[1024];
FileInputStream in = null;
try {
int len;
in = new FileInputStream(srcfile);
out.putNextEntry(new ZipEntry(basedir + srcfile.getName()));
while ((len = in.read(buf)) > 0) {
out.write(buf, 0, len);
}
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
if (out != null)
out.closeEntry();
if (in != null)
in.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
/**
* 壓縮檔案夾
* @param dir
* @param out
* @param basedir
*/
public void zipDirectory(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() + "/");
}
}
//測試
public static void main(String[] args) {
File f = new File("E:/Study/Java");
new CompactAlgorithm(new File( "D:/test",f.getName()+".zip")).zipFiles(f);
}
}
完整工程實作界面化,通過界面完成對檔案的壓縮和解壓,如下圖:
Java實作zip檔案解壓[到指定目錄]:http://blog.csdn.net/ljheee/article/details/52736091
完整工程:https://github.com/ljheee/MyZip1.0