InputStream,int,shot,long与byte数组之间的互相转换
编程技术 / houtizong 发布于 2年前 127
没别的，直接上代码！
package com.dst.util;import java.io.*;/** * 流操作工具类 * * @author 崔素强 */public class StreamTool {/** * @方法功能 InputStream 转为 byte * @param InputStream * @return 字节数组 * @throws Exception */public static byte[] inputStream2Byte(InputStream inStream)throws Exception {// ByteArrayOutputStream outSteam = new ByteArrayOutputStream();// byte[] buffer = new byte[1024];// int len = -1;// while ((len = inStream.read(buffer)) != -1) {// outSteam.write(buffer, 0, len);// }// outSteam.close();// inStream.close();// return outSteam.toByteArray();int count = 0;while (count == 0) {count = inStream.available();}byte[] b = new byte[count];inStream.read(b);return b;}/** * @方法功能 byte 转为 InputStream * @param 字节数组 * @return InputStream * @throws Exception */public static InputStream byte2InputStream(byte[] b) throws Exception {InputStream is = new ByteArrayInputStream(b);return is;}/** * @功能 短整型与字节的转换 * @param 短整型 * @return 两位的字节数组 */public static byte[] shortToByte(short number) {int temp = number;byte[] b = new byte[2];for (int i = 0; i < b.length; i++) {b[i] = new Integer(temp & 0xff).byteValue();// 将最低位保存在最低位temp = temp >> 8; // 向右移8位}return b;}/** * @功能 字节的转换与短整型 * @param 两位的字节数组 * @return 短整型 */public static short byteToShort(byte[] b) {short s = 0;short s0 = (short) (b[0] & 0xff);// 最低位short s1 = (short) (b[1] & 0xff);s1 <<= 8;s = (short) (s0 | s1);return s;}/** * @方法功能 整型与字节数组的转换 * @param 整型 * @return 四位的字节数组 */public static byte[] intToByte(int i) {byte[] bt = new byte[4];bt[0] = (byte) (0xff & i);bt[1] = (byte) ((0xff00 & i) >> 8);bt[2] = (byte) ((0xff0000 & i) >> 16);bt[3] = (byte) ((0xff000000 & i) >> 24);return bt;}/** * @方法功能 字节数组和整型的转换 * @param 字节数组 * @return 整型 */public static int bytesToInt(byte[] bytes) {int num = bytes[0] & 0xFF;num |= ((bytes[1] << 8) & 0xFF00);num |= ((bytes[2] << 16) & 0xFF0000);num |= ((bytes[3] << 24) & 0xFF000000);return num;}/** * @方法功能 字节数组和长整型的转换 * @param 字节数组 * @return 长整型 */public static byte[] longToByte(long number) {long temp = number;byte[] b = new byte[8];for (int i = 0; i < b.length; i++) {b[i] = new Long(temp & 0xff).byteValue();// 将最低位保存在最低位temp = temp >> 8;// 向右移8位}return b;}/** * @方法功能 字节数组和长整型的转换 * @param 字节数组 * @return 长整型 */public static long byteToLong(byte[] b) {long s = 0;long s0 = b[0] & 0xff;// 最低位long s1 = b[1] & 0xff;long s2 = b[2] & 0xff;long s3 = b[3] & 0xff;long s4 = b[4] & 0xff;// 最低位long s5 = b[5] & 0xff;long s6 = b[6] & 0xff;long s7 = b[7] & 0xff; // s0不变s1 <<= 8;s2 <<= 16;s3 <<= 24;s4 <<= 8 * 4;s5 <<= 8 * 5;s6 <<= 8 * 6;s7 <<= 8 * 7;s = s0 | s1 | s2 | s3 | s4 | s5 | s6 | s7;return s;}}
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