org.yx.util.StreamUtil Maven / Gradle / Ivy

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A quick developing framewort for internet company

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/**
 * Copyright (C) 2016 - 2030 youtongluan.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * 		http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.yx.util;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

public class StreamUtil {

	public static byte[] extractData(InputStream in, boolean closeInput) throws IOException {
		ByteArrayOutputStream out = new ByteArrayOutputStream();
		transferTo(in, out, closeInput);
		out.close();
		return out.toByteArray();
	}

	public static int transferTo(InputStream in, OutputStream output, boolean closeInput) throws IOException {
		if (in == null) {
			return 0;
		}
		int n = 0;
		int count = 0;
		byte[] temp = new byte[1024 * 4];
		while (-1 != (n = in.read(temp))) {
			output.write(temp, 0, n);
			count += n;
		}
		output.flush();
		if (closeInput) {
			in.close();
		}
		return count;
	}
}