java如何把InputStream转成文件 将inputstream转成file

File file = new File(System.getProperty("java.io.tmpdir")+File.separator+RandomUtil.randomString(8)+".zip");
        File file1 = new File("E:\\test\\shp.zip");
        FileInputStream inStream = new FileInputStream(file1);
        FileOutputStream outStream = new FileOutputStream(file);

        FileChannel in = inStream.getChannel();
        FileChannel out = outStream.getChannel();
        in.transferTo(0, in.size(), out);