Java后台处理压缩文件

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备用

 

 

import java.io.BufferedReader;  
import java.io.FileInputStream;  
import java.io.FileOutputStream;  
import java.io.InputStreamReader;  
import java.util.zip.GZIPInputStream;  
import java.util.zip.GZIPOutputStream;  
  
  
public class MainClass  
{  
    /** 
     * 将kuka.txt文件通过GZIPOutputStream压缩为test.gz 
     */  
    public void compression()  
    {  
        try  
        {  
            FileInputStream in=new FileInputStream("c:/kuka.txt");  
            GZIPOutputStream out=new GZIPOutputStream(new FileOutputStream("c:/test.gz"));  
            System.out.println("c:/kuka.txt---->c:/tets.gz");  
            int c;  
            while ((c=in.read())!=-1)  
            {  
                out.write(c);  //写压缩文件  
            }  
            in.close();  
            out.close();  
        } catch (Exception e)  
        {  
            e.printStackTrace();  
        }  
    }  
    /** 
     * 通过GZIPInputStream解压"test.gz"文件,将文件内容显示出来，并恢复为lovekuka.txt 
     */  
    public void decompression()  
    {  
        try  
        {  
            //首先读取压缩包中的内容，并显示出来  
            BufferedReader reader=new BufferedReader(  
                                  new InputStreamReader(  
                                  new GZIPInputStream(  
                                  new FileInputStream("c:/test.gz"))));  
            String s;  
            while ((s=reader.readLine())!=null)  
            {  
                System.out.println(s);  //读每一行，并显示出来  
            }  
            reader.close();  
              
            System.out.println("c:/test.gz--->c:/lovekuka.txt");  
            GZIPInputStream stream=new GZIPInputStream(new FileInputStream("c:/test.gz"));  
            FileOutputStream out=new FileOutputStream("c:/lovekuka.txt");  
            int c;  
            while((c=stream.read())!=-1)  
            {  
                out.write(c);  
            }  
            stream.close();  
            out.close();  
        } catch (Exception e)  
        {  
            e.printStackTrace();  
        }   
    }     
}