大文件下载压缩解析方法

/** 
 * 功能:压缩多个文件成一个zip文件 
 * @param srcfile：源文件列表 
 * @param zipfile：压缩后的文件 
 */  
public static void zipFiles(File[] srcfile, File zipfile) {  
    byte[] b = new byte[1024];  
    try {  
        //ZipOutputStream类：完成文件或文件夹的压缩  
        ZipOutputStream out = new ZipOutputStream(new FileOutputStream(zipfile));  
        for (int i = 0; i < srcfile.length; i++) {  
            FileInputStream in = new FileInputStream(srcfile[i]);  
            out.putNextEntry(new ZipEntry(srcfile[i].getName()));  
            int len;  
            while ((len = in.read(b)) > 0) {  
                out.write(b, 0, len);  
            }  
            out.closeEntry();  
            in.close();  
        }  
        out.close();  
        System.out.println("压缩完成.");  
    } catch (Exception e) {  
        e.printStackTrace();  
    }  
}  

 /** 
 * 功能:解压缩 
 * @param zipfile：需要解压缩的文件 
 * @param descDir：解压后的目标目录 
 */  
@SuppressWarnings({ "rawtypes", "resource" })
public static void unZipFiles(File zipfile, String descDir) {  
    try {  
        ZipFile zf = new ZipFile(zipfile);  
        for (Enumeration entries = zf.entries(); entries.hasMoreElements();) {  
            ZipEntry entry = (ZipEntry) entries.nextElement();  
            String zipEntryName = entry.getName();  
            InputStream in = zf.getInputStream(entry);  
            OutputStream out = new FileOutputStream(descDir + zipEntryName);  
            byte[] b = new byte[1024];  
            int len;  
            while ((len = in.read(b)) > 0) {  
                out.write(b, 0, len);  
            }  
            in.close();  
            out.close();  
            System.out.println("解压缩完成.");  
        }  
    } catch (Exception e) {  
        e.printStackTrace();  
    }  
}