java文件操作zip压缩文件读取写操作

本文章讲了三个实例是利用java对zip 压缩文件的读写操作，实例如下。

创建一个zip压缩文件

import java.io.fileinputstream;
import java.io.fileoutputstream;
import java.util.zip.zipentry;
import java.util.zip.zipoutputstream;

public class main {
  public static void main(string[] args) throws exception {
    fileinputstream instream = new fileinputstream("test.txt");
    zipoutputstream outstream = new zipoutputstream(new fileoutputstream("compressed.zip"));

    outstream.putnextentry(new zipentry("test.txt"));

    byte[] buffer = new byte[1024];
    int bytesread;

    while ((bytesread = instream.read(buffer)) > 0) {
      outstream.write(buffer, 0, bytesread);
    }

    outstream.closeentry();
    outstream.close();
    instream.close();
  }

}

解压zip 文件

import java.io.fileinputstream;
import java.util.zip.zipentry;
import java.util.zip.zipinputstream;

public class main {

  public static void main(string[] args) throws exception {
    fileinputstream fis = new fileinputstream("c:/myzip.zip");
    zipinputstream zis = new zipinputstream(fis);
    zipentry ze;
    while ((ze = zis.getnextentry()) != null) {
      system.out.println(ze.getname());
      zis.closeentry();
    }

    zis.close();

  }
}

写zip文件

import java.io.fileoutputstream;
import java.util.zip.zipentry;
import java.util.zip.zipoutputstream;

public class main {
  public static void main(string[] args) throws exception {
    fileoutputstream fos = new fileoutputstream("c:/myzip.zip");
    zipoutputstream zos = new zipoutputstream(fos);
    zipentry ze = new zipentry("c:/file1.txt");
    zos.putnextentry(ze);
    zos.closeentry();
    ze = new zipentry("c:/file2.txt");
    zos.putnextentry(ze);
    zos.closeentry();
    zos.close();
  }
}