zip file

/*==============================================================================
 *ZIP嶌惉僣乕儖
 =============================================================================*/
import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.util.zip.CRC32;
import java.util.zip.CheckedOutputStream;
 
import java.util.zip.ZipEntry;
import java.util.zip.ZipOutputStream;
 
public class ZipCompressor {
    static final int BUFFER = 8192;
 
    private File zipFile;  
 
    public ZipCompressor(String pathName) {
        zipFile = new File(pathName);  
    }  
 
    public void compress(String srcPathName) {  
        File file = new File(srcPathName);  
        if (!file.exists())  
            throw new RuntimeException(srcPathName + "懚嵼偟側偄");  
        try {  
            FileOutputStream fileOutputStream = new FileOutputStream(zipFile);  
            CheckedOutputStream cos = new CheckedOutputStream(fileOutputStream,  
                    new CRC32());  
            ZipOutputStream out = new ZipOutputStream(cos);  
            String basedir = "";  
            compress(file, out, basedir);  
            out.close();  
        } catch (Exception e) {  
            throw new RuntimeException(e);  
        }  
    }  
 
    private void compress(File file, ZipOutputStream out, String basedir) {  
        /* 僨傿儗僋僩儕偲偐僼傽僀儖偲偐偦傟偧傟張棟偟傑偡 */ 
        if (file.isDirectory()) {  
            System.out.println("埑弅丗" + basedir + file.getName());  
            this.compressDirectory(file, out, basedir);  
        } else {  
            System.out.println("埑弅丗" + basedir + file.getName());  
            this.compressFile(file, out, basedir);  
        }  
    }  
 
    /** 僨傿儗僋僩儕傪埑弅 */ 
    private void compressDirectory(File dir, ZipOutputStream out, String basedir) {  
        if (!dir.exists())  
            return;  
 
        File[] files = dir.listFiles();  
        for (int i = 0; i < files.length; i++) {  
            compress(files[i], out, basedir + dir.getName() + "/");  
        }  
    }  
 
    /** 暥審傪埑弅 */ 
    private void compressFile(File file, ZipOutputStream out, String basedir) {  
        if (!file.exists()) {  
            return;  
        }  
        try {  
            BufferedInputStream bis = new BufferedInputStream(  
                    new FileInputStream(file));  
            ZipEntry entry = new ZipEntry(basedir + file.getName());  
            out.putNextEntry(entry);  
            int count;  
            byte data[] = new byte[BUFFER];  
            while ((count = bis.read(data, 0, BUFFER)) != -1) {  
                out.write(data, 0, count);  
            }  
            bis.close();  
        } catch (Exception e) {  
            throw new RuntimeException(e);  
        }  
    }  

 

posted on 2009-03-04 18:48 koradji 阅读(260) 评论(0)  编辑  收藏 所属分类: java


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