如何在java中解压zip和rar文件
为了方便广大的程序员朋友,下面讲一讲如何在java中实现对zip和rar文件的解压,一起和小编来看看吧!
一、解压rar文件。
由于WinRAR 是共享软件,并不是开源的,所以解压rar文件的前提是系统已经安装了winrar,比如本人的安装路径是:
C:Program FilesWinRAR
然后运用ess 的.相关知识来运行系统命令行来实现解压的。
winrar 命令行相关参数自己可以搜索下的网上资料很多
具体代码:
Java代码
**
* 解压rar文件(需要系统安装Winrar 软件)
* @author Michael sun
*/
public class UnRarFile {
/**
* 解压rar文件
*
* @param targetPath
* @param absolutePath
*/
public void unRarFile(String targetPath, String absolutePath) {
try {
// 系统安装winrar的路径
String cmd = "C:Program FilesWinRAR";
String unrarCmd = cmd + " x -r -p- -o+ " + absolutePath + " "
+ targetPath;
Runtime rt = untime();
Process pre = (unrarCmd);
InputStreamReader isr = new InputStreamReader(nputStream());
BufferedReader bf = new BufferedReader(isr);
String line = null;
while ((line = Line()) != null) {
line = ();
if (""ls(line)) {
continue;
}
tln(line);
}
e();
} catch (Exception e) {
tln("解压发生异常");
}
}
/**
* @param args
*/
public static void main(String[] args) {
String targetPath = "D:testunrar";
String rarFilePath = "D:test";
UnRarFile unrar = new UnRarFile();
rFile(targetPath, rarFilePath);
}
}
二、解压zip文件
由于zip是免费的,所以在jdk里提供了相应的类对zip文件的实现:
.*,详细情况可以参考java API
Java代码
/**
* 解压zip文件
* @author Michael sun
*/
public class UnzipFile {
/**
* 解压zip文件
*
* @param targetPath
* @param zipFilePath
*/
public void unzipFile(String targetPath, String zipFilePath) {
try {
File zipFile = new File(zipFilePath);
InputStream is = new FileInputStream(zipFile);
ZipInputStream zis = new ZipInputStream(is);
ZipEntry entry = null;
tln("开始解压:" + ame() + "...");
while ((entry = extEntry()) != null) {
String zipPath = ame();
try {
if (rectory()) {
File zipFolder = new File(targetPath + rator
+ zipPath);
if (!ts()) {
rs();
}
} else {
File file = new File(targetPath + rator
+ zipPath);
if (!ts()) {
File pathDir = arentFile();
rs();
teNewFile();
}
FileOutputStream fos = new FileOutputStream(file);
int bread;
while ((bread = ()) != -1) {
e(bread);
}
e();
}
tln("成功解压:" + zipPath);
} catch (Exception e) {
tln("解压" + zipPath + "失败");
continue;
}
}
e();
e();
tln("解压结束");
} catch (Exception e) {
tStackTrace();
}
}
/**
* @param args
*/
public static void main(String[] args) {
String targetPath = "D:testunzip";
String zipFile = "D:test";
UnzipFile unzip = new UnzipFile();
pFile(targetPath, zipFile);
}
}