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AJAXJS aims to full-stack, not only the server-side framework,
but also integrates the front-end library. It's written in HTML5 + Java, a successor to the JVM platform, efficient, secure, stable, cross-platform and many other advantages, but it abandoned the traditional enterprise architecture brought about by the large and bloated,
emphasizing the lightweight, and fast, very suitable for the Internet fast application.
/**
* Copyright 2015 Sp42 [email protected]
*
* 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 com.ajaxjs.util.io;
import java.io.File;
import java.io.IOException;
/**
* 因为泛型的缘故，不好直接使用 Stream，故特提供该类。另外提供容纳 byte 工具类的地方
*
* @author Sp42 [email protected]
*/
public class StreamUtil extends StreamChain {
/**
* 在字节数组里查找某个字节数组，找到返回<=0，未找到返回-1
*
* @param data 被搜索的内容
* @param search 要搜索内容
* @param start 搜索起始位置
* @return 目标位置，找不到返回-1
*/
public static int byteIndexOf(byte[] data, byte[] search, int start) {
int len = search.length;
for (int i = start; i < data.length; i++) {
int temp = i, j = 0;
while (data[temp] == search[j]) {
temp++;
j++;
if (j == len)
return i;
}
}
return -1;
}
/**
* 在字节数组里查找某个字节数组，找到返回<=0，未找到返回-1
*
* @param data 被搜索的内容
* @param search 要搜索内容
* @return 目标位置，找不到返回-1
*/
public static int byteIndexOf(byte[] data, byte[] search) {
return byteIndexOf(data, search, 0);
}
/**
* 合并两个字节数组
*
* @param a 数组a
* @param b 数组b
* @return 新合并的数组
*/
public static byte[] concat(byte[] a, byte[] b) {
byte[] c = new byte[a.length + b.length];
System.arraycopy(a, 0, c, 0, a.length);
System.arraycopy(b, 0, c, a.length, b.length);
return c;
}
/**
* 获得指定文件的 byte 数组
*
* @param file 文件对象
* @return 文件字节数组
*/
public static byte[] fileAsByte(File file) {
FileUtil fu = new FileUtil();
byte[] b = null;
try {
b = fu.setFile(file).read().inputStream2Byte().getData();
} catch (IOException e) {
e.printStackTrace();
} finally {
fu.close();
}
return b;
}
}