如何提取讀取壓縮文件？

Question

如何從使用JAVA庫的壓縮文件中提取數據？有沒有解壓縮庫，我得到的文件和操縱它？

Answer 1

您可以使用 「java.util.zip」 包。

請參閱this article by Sun。

Answer 2

http://java.sun.com/j2se/1.4.2/docs/api/java/util/zip/package-summary.html http://www.roseindia.net/java/beginners/JavaUncompress.shtml

import java.util.zip; 
import java.io.OutputStream; 
import java.io.FileOutputStream; 
import java.io.FileInputStream; 
import java.io.FileNotFoundException; 
import java.io.IOException; 

public class JavaUncompress{ 
public static void main(String args[]){ 
try{ 
    //To Uncompress GZip File Contents we need to open the gzip file..... 
    if(args.length<=0){ 
    System.out.println("Please enter the valid file name"); 
    } 
    else{ 
    String inFilename = args[0]; 
    System.out.println("Opening the gzip file.......................... : opened"); 


    ZipInputStream zipInputStream = null; 
    FileInputStream fileInputStream = null; 
    zipInputStream = new ZipInputStream(new 

FileInputStream(inFilename)); 
    System.out.println("Opening the output file............ : opened"); 
    String outFilename = inFilename +".pdf"; 
    OutputStream out = new FileOutputStream(outFilename); 
    System.out.println("Transferring bytes from the 

compressed file to the output file........: 
    Transfer successful"); 
    byte[] buf = new byte[1024]; //size can be 

//changed according to programmer's need. 
    int len; 
    while ((len = zipInputStream.read(buf)) > 0) { 
     out.write(buf, 0, len); 
    } 
    System.out.println("The file and stream is ......closing.......... : closed"); 
    zipInputStream.close(); 
    out.close(); 
     } 
    } 
    catch(IOException e){ 
    System.out.println("Exception has been thrown" + e); 
    } 
    } 
} 

Answer 3

共享壓縮 http://commons.apache.org