Java课程设计笔记-用org.apache.tools.zip中的类压缩/解压zip文件

本来想装一发逼用zlib库的……结果没找到怎么用zlib库以流的形式压缩/解压多个文件，跪了……先用Java实现这个功能吧

用java.util.zip包中的工具类解压/压缩的时候遇到点问题，文件名是中文的时候会抛出异常……于是改成用org.apache.tools.zip中的类

代码：

import org.apache.tools.zip.ZipEntry;
import org.apache.tools.zip.ZipFile;
import org.apache.tools.zip.ZipOutputStream;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.ArrayList;
import java.util.Enumeration;

public class ZipUtil {

public static int zip(ArrayList<File> files, File targetFile) throws IOException {
int zipped = 0;
if(!targetFile.exists()){
targetFile.createNewFile();
}
ZipOutputStream out = new ZipOutputStream(new FileOutputStream(targetFile));

for(File i : files) {
zip("", i, out);
zipped++;
}

out.close();

return zipped;
}

private static void zip(String entry, File file, ZipOutputStream out) throws IOException {
if(!(file.canRead() && file.exists())) {
throw new IOException();
}
if(file.isDirectory()) {
String nextEntry = entry + file.getName() + File.separator;

ZipEntry e = new ZipEntry(nextEntry);
out.putNextEntry(new ZipEntry(nextEntry));
File[] files = file.listFiles();
if(files == null){
throw new IOException();
}
for(File i : files) {
zip(nextEntry, i, out);
}
} else {
if(!(file.exists() && file.canRead())){
throw new IOException("input file does not exist or cannot read");
}

out.putNextEntry(new ZipEntry(entry + file.getName()));
InputStream input = new FileInputStream(file);
int tmp;
while(-1 != (tmp = input.read())){
out.write(tmp);
}
input.close();
}
}

public static void unZip(File inputFile, File targetDirectory)
throws IOException, IllegalArgumentException{
if(targetDirectory.exists() && (!targetDirectory.isDirectory())) {
throw new IllegalArgumentException("target directory should be a directory");
}

ZipFile zipFile = new ZipFile(inputFile);
Enumeration<ZipEntry> entries = zipFile.getEntries();
InputStream inputStream = null;
FileOutputStream fileOutputStream = null;

while(entries.hasMoreElements()) {
ZipEntry zipEntry = entries.nextElement();
System.out.println(zipEntry.getName() + " " + zipEntry.isDirectory());
if(zipEntry.isDirectory()) {
File dir = new File(targetDirectory.getAbsolutePath() + File.separator + zipEntry.getName());
dir.mkdirs();
} else {
File file = new File(targetDirectory.getAbsolutePath() + File.separator + zipEntry.getName());
File parentDir = file.getParentFile();
file.createNewFile();
InputStream input = zipFile.getInputStream(zipEntry);
OutputStream output = new FileOutputStream(file);
int temp;
while(-1 != (temp = input.read())){
output.write(temp);
}
input.close();
output.close();
}
}
}
}