ZipUtil

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package cast.c514.transfer.util;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.nio.charset.Charset;
import java.util.zip.ZipEntry;
import java.util.zip.ZipInputStream;

/**
 *
 * @author cuizhf
 */
public class MyZipUtil {

private MyZipUtil() {
    }

/**
     * 执行压缩文件的解压,并自动生成文件的操作
     *
     * @throws java.io.IOException
     * @see http://blog.csdn.net/isea533/article/details/7995472
     * @param in
     * @param outputDirectory
     */
    public static void unZip(InputStream in, String outputDirectory) throws IOException {
        // 通过Charset.forName("GBK")解决乱码问题
        try (ZipInputStream zins = new ZipInputStream(in, Charset.forName("GBK"))) {
            ZipEntry ze;
            byte[] ch = new byte[256];
            while ((ze = zins.getNextEntry()) != null) {
                File zfile = new File(outputDirectory + File.separator + ze.getName());
                File fpath = new File(zfile.getParentFile().getPath());
                if (ze.isDirectory()) {
                    if (!zfile.exists()) {
                        zfile.mkdirs();
                    }
                    zins.closeEntry();
                } else {
                    if (!fpath.exists()) {
                        fpath.mkdirs();
                    }
                    try (FileOutputStream fouts = new FileOutputStream(zfile)) {
                        int i;
                        while ((i = zins.read(ch)) != -1) {
                            fouts.write(ch, 0, i);
                        }
                        zins.closeEntry();
                    }
                }
            }
        }
    }
}