/*
* (C) 2007-2012 Alibaba Group Holding Limited.
*
* 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.
* Authors:
* wuhua <wq163@163.com> , boyan <killme2008@gmail.com>
*/
package com.taobao.metamorphosis.utils;
import java.util.zip.CRC32;
/**
* Checksum������
*
* @author boyan
* @Date 2011-4-21
*
*/
public class CheckSum {
public static final int crc32(byte[] array) {
return crc32(array, 0, array.length);
}
public static final int crc32(byte[] array, int offset, int length) {
CRC32 crc32 = new CRC32();
crc32.update(array, offset, length);
return (int) (crc32.getValue() & 0x7FFFFFFF);
}
}