- 2023-03-10 09:18:36
- 4097 热度
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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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