java學習壓縮文件以及解壓文件

 壓縮單個文件代碼如下：

package 二進制文件讀寫;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.zip.*;
/*
 * 按單個文件的壓縮
 */
public class App {

	public static void main(String[] args) throws IOException{
		// TODO Auto-generated method stub
    
		File file=new File("D:/text/temp.txt");//定義要壓縮的文件
		File zipFile=new File("D:/text/temp.zip");//定義壓縮文件名稱
		
			InputStream input=new FileInputStream(file);
			ZipOutputStream zipOut=null;//聲明壓縮對象
			zipOut=new ZipOutputStream(new FileOutputStream(zipFile));
				zipOut.putNextEntry(new ZipEntry(file.getName()));
			zipOut.setComment("zip hello");
			int temp=0;
			while((temp=input.read())!=-1)
			{
				zipOut.write(temp);
			}
			input.close();
			zipOut.close();
			System.out.print("ok");
			
		} 
		
		
		
		
		
	}

}

壓縮一個文件夾的代碼：

package 文件夾壓縮;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.zip.ZipEntry;
import java.util.zip.ZipOutputStream;

public class App {

	public static void main(String[] args) throws IOException {
		// TODO Auto-generated method stub

		
		File file=new File("D:/text");
		File zipFile=new File("D:/mult2.zip");
		
		InputStream input=null;
		ZipOutputStream zipOut=null;//聲明壓縮流對象
		zipOut=new ZipOutputStream(new FileOutputStream(zipFile));
		zipOut.setComment("hello zip");
		//開始壓縮
		int temp=0;
		if(file.isDirectory())
		{
			File lists[]=file.listFiles();//返回全部文件夾
			for(int i=0;i<lists.length;i++)
			{
				input=new FileInputStream(lists[i]);
				//設置Ectry文件
				zipOut.putNextEntry(new ZipEntry(file.getName()+File.separator+lists[i].getName()));
				while((temp=input.read())!=-1)
				{
					zipOut.write(temp);
				}
				
				input.close();
			}
			
		}
		
		zipOut.close();
	}

}

 解壓單個文件

package 文件夾解壓;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.util.zip.ZipEntry;
import java.util.zip.ZipInputStream;

public class App {

	public static void main(String[] args) throws IOException {
		File zipFile=new File("D:/text/temp.zip");
		ZipInputStream input=new ZipInputStream(new FileInputStream(zipFile));
		ZipEntry zip= input.getNextEntry();
		System.out.println(zip.getName());
		
		File outfile=new File("D:/"+zip.getName());
		OutputStream out=new FileOutputStream(outfile);
		int temp=0;
		while((temp=input.read())!=-1)
		{
			out.write(temp);
		}
		input.close();
		out.close();
		
	}
}

 

解壓多個文件

package 解壓多個文件;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.zip.ZipEntry;
import java.util.zip.ZipException;
import java.util.zip.ZipFile;
import java.util.zip.ZipInputStream;

public class App {

	public static void main(String[] args) throws ZipException, IOException {
		// TODO Auto-generated method stub

		File file=new File("D:/text/temp.zip");
		File outFile=null;
		ZipFile zipfile=new ZipFile(file);
		ZipInputStream zipInput=null;
		
		OutputStream out=null;
		InputStream input=null;
		ZipEntry entry=null;
		zipInput=new ZipInputStream(new FileInputStream(file));
		while((entry=zipInput.getNextEntry())!=null)
		{
			outFile=new File("D:/"+entry.getName());
			if(!outFile.getParentFile().exists())
        {
	        outFile.getParentFile().mkdirs();
        }
			
        if(!outFile.exists())
        {
        	if(entry.isDirectory())
        	{
        		outFile.mkdir();
        	}
        	else
        	{
        		outFile.createNewFile();
        	}
        }
        if(!entry.isDirectory())
        {
        	input=zipfile.getInputStream(entry);//得到每一個實體的輸入流
        	out=new FileOutputStream(outFile);
                int temp=0;
        	while((temp=input.read())!=-1)
        	{
        		out.write(temp);
        	}
        	input.close();
        	out.close();
        }
			
		}
		input.close();
		
	}

}