java操作压缩文件

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java io中提供了丰富的文件操作工具，其中对压缩文件的支持也很方便，下面说明对zip文件做多文件读写的用法：

public class file2 {
 
public static void main(String[] args) throws Exception {
FileOutputStream f = new FileOutputStream("test.zip");
CheckedOutputStream csum = new CheckedOutputStream(f, new Adler32());
ZipOutputStream zos = new ZipOutputStream(csum);
BufferedOutputStream out = new BufferedOutputStream(zos);
zos.setComment("A testing of java zip");
String[] s = { "1.txt", "2.txt" };
for (String ss : s) {
System.out.println("wrirting file:" + ss);
BufferedReader in = new BufferedReader(new FileReader(ss));
zos.putNextEntry(new ZipEntry(ss));
int c;
while ((c = in.read()) != -1) {
out.write(c);
}
in.close();
out.flush();
}
out.close();
System.out.println(csum.getChecksum().getValue());
 
System.out.println("reading……");
FileInputStream f1 = new FileInputStream("test.zip");
CheckedInputStream csum1 = new CheckedInputStream(f1, new Adler32());
ZipInputStream in2 = new ZipInputStream(csum1);
BufferedInputStream bis = new BufferedInputStream(in2);
ZipEntry ze;
while ((ze = in2.getNextEntry()) != null) {
System.out.println(ze);
int x;
while ((x = bis.read()) != -1) {
System.out.write(x);
}
System.out.println();
}
System.out.println(csum1.getChecksum().getValue());
bis.close();
ZipFile zf = new ZipFile("test.zip");
Enumeration e = zf.entries();
while (e.hasMoreElements()) {
ZipEntry ze2 = (ZipEntry) e.nextElement();
System.out.println(ze2);
}
 
}
}