//long类型转成byte数组 publicstaticbyte[] longToByte(long number){ long temp = number; byte[] b =newbyte[8]; for(int i =0; i < b.length; i++){ b[i]=newLong(temp &0xff).byteValue();// 将最低位保存在最低位 temp = temp >>8;// 向右移8位 } return b; } //byte数组转成long publicstaticlong 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; } /** * 注释:int到字节数组的转换! * * @param number * @return */ publicstaticbyte[] intToByte(int number){ int temp = number; byte[] b =newbyte[4]; for(int i =0; i < b.length; i++){ b[i]=newInteger(temp &0xff).byteValue();// 将最低位保存在最低位 temp = temp >>8;// 向右移8位 } return b; } /** * 注释:字节数组到int的转换! * * @param b * @return */ publicstaticint byteToInt(byte[] b){ int s =0; int s0 = b[0]&0xff;// 最低位 int s1 = b[1]&0xff; int s2 = b[2]&0xff; int s3 = b[3]&0xff; s3 <<=24; s2 <<=16; s1 <<=8; s = s0 | s1 | s2 | s3; return s; } /** * 注释:short到字节数组的转换! * * @param s * @return */ publicstaticbyte[] shortToByte(short number){ int temp = number; byte[] b =newbyte[2]; for(int i =0; i < b.length; i++){ b[i]=newInteger(temp &0xff).byteValue();// 将最低位保存在最低位 temp = temp >>8;// 向右移8位 } return b; } /** * 注释:字节数组到short的转换! * * @param b * @return */ publicstaticshort 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; } 来自: