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

public class ZipUtil {

    //压缩单个文件
    public static void compressFile(String sourceFile, String destFile)throws IOException {
        File file=new File(sourceFile);
        ZipOutputStream zos=new ZipOutputStream(new FileOutputStream(destFile));
        recursiveCompression(file, file.getName(), zos);
        zos.close();
    }

    //压缩文件列表
    public static void compressList(List<String> sourceList, String destFile) throws IOException {
        ZipOutputStream zos=new ZipOutputStream(new FileOutputStream(destFile));
        for (String sourceFile:sourceList) {
            File file =new File(sourceFile);
            recursiveCompression(file, file.getName(), zos);
        }
        zos.close();
    }

    //递归压缩
    public static void recursiveCompression(File sourceFile, String filename, ZipOutputStream zos)throws IOException {
        if (sourceFile.isDirectory()) {
            filename = filename.endsWith("/") ?filename: filename + "/";
            zos.putNextEntry(new ZipEntry(filename));
            zos.closeEntry();
            for (File child:sourceFile.listFiles()) {
                recursiveCompression(child, filename + child.getName(), zos);
            }
            //如果当前递归对象是文件夹，加入ZipEntry之后就返回
            return;
        }
        FileInputStream fis=new FileInputStream(sourceFile);
        zos.putNextEntry(new ZipEntry(filename));
        byte[] bytes=new byte[1024];
        int len;
        while ((len = fis.read(bytes)) >= 0) {
            zos.write(bytes, 0, len);
        }
        fis.close();
    }

    //解压文件
    public static void unCompress(String zipFile, String destDir)throws IOException {
        byte[] buffer=new byte[1024];
        ZipInputStream zis=new ZipInputStream(new FileInputStream(zipFile));
        ZipEntry zipEntry=zis.getNextEntry();
        while (zipEntry != null) {
            File file=new File(destDir, zipEntry.getName());
            if (zipEntry.isDirectory()) {
                if (!file.exists()) file.mkdirs();
            } else {
                FileOutputStream fos=new FileOutputStream(file);
                int len;
                while ((len = zis.read(buffer)) > 0) {
                    fos.write(buffer, 0, len);
                }
                fos.close();
            }
            zipEntry = zis.getNextEntry();
        }
        zis.closeEntry();
        zis.close();
    }

}