(java 基础知识) Zip解压与压缩(java.util.zip)

下面的分别是写和读zip文件，其中写是递归的，功能完备了。读只是读根目录的，缺少递归。

而且没有涉及中文问题：



[c-sharp]
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import java.io.*;
import java.util.zip.*;

public class Zip {
static final int BUFFER = 2048;
static boolean flag = false;

public static void main(String args[])throws IOException{
File file= new File("D:/Temp");
ZipSubdirectory(file);
FileInputStream file1 = new FileInputStream(ZipSubdirectory(file));
System.out.println(file1.toString());
}
//ZipSubdirectory函数将一个指定目录（包括它子目录）压缩成一个同名压缩文件(这里称为"ORIGIN")

public static File ZipSubdirectory(File myDir)throws IOException{
//创建缓冲输入流BufferedInputStream

BufferedInputStream origin = null;
//创建ZipOutputStream对象，将向它传递希望写入文件的输出流

File zipFile=new File("D:/"+myDir.getName()+".zip");
FileOutputStream fos=new FileOutputStream(zipFile);
ZipOutputStream out=new ZipOutputStream(new BufferedOutputStream(fos,BUFFER));
//dirContents[]获取当前目录(myDir)所有文件对象（包括子目录名)

File dirContents[]=myDir.listFiles();
//创建临时文件tempFile,使用后删除
File tempFile=null;
try{
//处理当前目录所有文件对象，包括子目录

for(int i=0;i < dirContents.length; i++){
//使用递归方法将当前目录的子目录转成一个ZIP文件，并作为一个ENTRY加进"ORIGIN"

if(dirContents[i].isDirectory()){
tempFile = ZipSubdirectory(dirContents[i]);
flag=true;
}
//如果当前文件不是子目录
else {
tempFile=dirContents[i];
//flag标记tempFile是否由子目录压缩成的ZIP文件

flag = false;
}
System.out.println("Compress file: "+tempFile.getName());
FileInputStream fis = new FileInputStream(tempFile);
origin = new BufferedInputStream(fis,BUFFER);
//为被读取的文件创建压缩条目

ZipEntry entry = new ZipEntry(tempFile.getName());
byte data[]= new byte[BUFFER];
int count;
//在向ZIP输出流写入数据之前，必须首先使用out.putNextEntry(entry); 方法安置压缩条目对象

out.putNextEntry(entry);
//向ZIP 文件写入数据

while((count=origin.read(data,0,BUFFER))!=-1){
out.write(data,0,count);
}
//tempFile是临时生成的ZIP文件,删除它

if(flag==true){
flag = tempFile.delete();
System.out.println("Delete file:"+tempFile.getName()+flag);
}
//关闭输入流
origin.close();
}
out.close();
} catch(Exception e){
System.out.println(e);
}
//递归返回
return zipFile;
}
}

[c-sharp] 
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import java.io.BufferedInputStream;  
import java.io.BufferedOutputStream;  
  
import java.io.FileInputStream;  
import java.io.FileOutputStream;  
  
import java.util.zip.ZipEntry;  
import java.util.zip.ZipInputStream;  
import java.util.zip.ZipOutputStream;  
  
public class Test {  
  
  
    public static void main(String[] args) {  
        readFileAndWriteZip();  
        unZipFile();  
    }  
  
    public static void unZipFile() {  
    try{  
        int BUFFER = 1024;  
        BufferedOutputStream dest = null;  
        FileInputStream fis = new FileInputStream("D:/Temp.zip");  
        ZipInputStream zis = new ZipInputStream(new BufferedInputStream(fis));  
        ZipEntry entry;  
        while ((entry = zis.getNextEntry()) != null) {  
            System.out.println("Extracting: " + entry);  
            int count;  
            byte data[] = new byte[1024];  
            FileOutputStream fos = new  FileOutputStream("D:/"+entry.getName());  
            dest = new BufferedOutputStream(fos, BUFFER);  
            while ((count = zis.read(data, 0, BUFFER)) != -1) {  
                dest.write(data, 0, count);  
            }  
            dest.flush();  
            dest.close();  
        }  
        zis.close();  
    } catch (Exception e) {  
        e.printStackTrace();  
    }  
  
    }  
  
    public static void readFileAndWriteZip() {  
  
        try {  
               
        } catch (Exception ex){  
            System.err.println(ex.toString());  
        }  
    }  
  
       
  
}  

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;

import java.io.FileInputStream;
import java.io.FileOutputStream;

import java.util.zip.ZipEntry;
import java.util.zip.ZipInputStream;
import java.util.zip.ZipOutputStream;

public class Test {

	public static void main(String[] args) {
		readFileAndWriteZip();
		unZipFile();
	}

	public static void unZipFile() {
	try{
		int BUFFER = 1024;
		BufferedOutputStream dest = null;
        FileInputStream fis = new FileInputStream("D:/Temp.zip");
        ZipInputStream zis = new ZipInputStream(new BufferedInputStream(fis));
        ZipEntry entry;
        while ((entry = zis.getNextEntry()) != null) {
            System.out.println("Extracting: " + entry);
            int count;
            byte data[] = new byte[1024];
            FileOutputStream fos = new  FileOutputStream("D:/"+entry.getName());
            dest = new BufferedOutputStream(fos, BUFFER);
            while ((count = zis.read(data, 0, BUFFER)) != -1) {
                dest.write(data, 0, count);
            }
            dest.flush();
            dest.close();
        }
        zis.close();
    } catch (Exception e) {
        e.printStackTrace();
    }

	}

	public static void readFileAndWriteZip() {

		try {
			 
		} catch (Exception ex){
			System.err.println(ex.toString());
		}
	}

	 

}

测试通过的。