java zip压缩多个文件

最新推荐文章于 2024-07-10 10:25:26 发布

转载最新推荐文章于 2024-07-10 10:25:26 发布 · 491 阅读

本文介绍了使用Java实现文件的压缩与解压缩过程，包括创建压缩文件、添加文件到压缩包以及读取压缩包内的文件内容。通过使用ZipOutputStream和ZipInputStream类，实现了文件的压缩和解压缩操作。

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Java代码

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.FileReader;
import java.io.IOException;
import java.util.Enumeration;
import java.util.zip.Adler32;
import java.util.zip.CheckedInputStream;
import java.util.zip.CheckedOutputStream;
import java.util.zip.ZipEntry;
import java.util.zip.ZipFile;
import java.util.zip.ZipInputStream;
import java.util.zip.ZipOutputStream;
import com.lifz.chapters18.util.ConstantUtil;
public class ZipCompress {
public static void main(String[] args) throws IOException {
writeIn() ;
readZip();
}
private static void writeIn() throws IOException {
FileOutputStream fos = new FileOutputStream("c:/testZip.zip");
CheckedOutputStream cos = new CheckedOutputStream(fos, new Adler32());
ZipOutputStream zos = new ZipOutputStream(cos);
BufferedOutputStream bos = new BufferedOutputStream(zos);
zos.setComment("test zip ");
String[] fileArray = { ConstantUtil.file, ConstantUtil.secondFile };
String[] fileA = { "java.txt", "java2.txt" };
for (int i = 0; i < fileArray.length; i++) {
zos.putNextEntry(new ZipEntry(fileA[i]));
BufferedReader br = new BufferedReader(new FileReader(new File(
fileArray[i])));
int c;
while ((c = br.read()) != -1) {
bos.write(c);
}
br.close();
bos.flush();
}
bos.close();
}
private static void readZip() throws IOException {
FileInputStream fis = new FileInputStream("c:/testZip.zip");
CheckedInputStream cis = new CheckedInputStream(fis, new Adler32());
ZipInputStream zis = new ZipInputStream(cis);
BufferedInputStream bis = new BufferedInputStream(zis);
ZipEntry ze;
while((ze = zis.getNextEntry())!=null){
System.out.println("reading file"+ze);
int x;
while((x=bis.read())!=-1){
System.out.println(x);
}
}
System.out.println("checksum"+cis.getChecksum().getValue());
bis.close();
Enumeration e =new ZipFile("c:/testZip.zip").entries();
while(e.hasMoreElements()){
ZipEntry ze2 = (ZipEntry) e.nextElement();
System.out.println("file"+ze2);
}
}
}