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一篇关于zip包的解压缩，支持目录嵌套和文件目录的中文名，也算补上上次的只压不解，（注意先倒入ant.jar这个包，同时要确认ant.jar包中有org.apache.tools.zip）：
import java.io.*;
public class DeCompressBook {
public DeCompressBook() {
}
private void createDirectory(String directory, String subDirectory) {
String dir[];
File fl = new File(directory);
try {
if (subDirectory == "" && fl.exists() != true)
fl.mkdir();
else if (subDirectory != "") {
dir = subDirectory.replace('\\', '/').split("/");
for (int i = 0; i < dir.length; i++) {
File subFile = new File(directory + File.separator + dir[i]);
if (subFile.exists() == false)
subFile.mkdir();
directory += File.separator + dir[i];
}
}
}
catch (Exception ex) {
System.out.println(ex.getMessage());
}
}
public void unZip(String zipFileName, String outputDirectory) throws Exception {
try {
org.apache.tools.zip.ZipFile zipFile = new org.apache.tools.zip.ZipFile(zipFileName);
java.util.Enumeration e = zipFile.getEntries();
org.apache.tools.zip.ZipEntry zipEntry = null;
createDirectory(outputDirectory, "");
while (e.hasMoreElements()) {
zipEntry = (org.apache.tools.zip.ZipEntry) e.nextElement();
System.out.println("unziping " + zipEntry.getName());
if (zipEntry.isDirectory()) {
String name = zipEntry.getName();
name = name.substring(0, name.length() - 1);
File f = new File(outputDirectory + File.separator + name);
f.mkdir();
System.out.println("创建目录：" + outputDirectory + File.separator + name);
}
else {
String fileName = zipEntry.getName();
fileName = fileName.replace('\\', '/');
// System.out.println("测试文件1：" +fileName);
if (fileName.indexOf("/") != -1)
{
createDirectory(outputDirectory,
fileName.substring(0, fileName.lastIndexOf("/")));
fileName=fileName.substring(fileName.lastIndexOf("/")+1,fileName.length());
}
File f = new File(outputDirectory + File.separator + zipEntry.getName());
f.createNewFile();
InputStream in = zipFile.getInputStream(zipEntry);
FileOutputStream out=new FileOutputStream(f);
byte[] by = new byte[1024];
int c;
while ( (c = in.read(by)) != -1) {
out.write(by, 0, c);
}
out.close();
in.close();
}
}
}
catch (Exception ex) {
System.out.println(ex.getMessage());
}
}
} | 
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