关于Soeckt 流操作的数据转换工具方法

java 代码

package com.sunhill.k1c.sms.util;
import java.nio.*;

//数据转换
/**
*create by Shane about dataconvert
*PCCW BJ DEV
*/

public class DataConvertUtil {
    public static int byte2int(byte[] b){
         return b[3] & 0xff | (b[2] & 0xff) << 8 | (b[1] & 0xff) << 16 | (b[0] & 0xff) << 24;
    }
    public static byte[] int2Byte(int value){

        byte[] b=new byte[4];
        ByteBuffer buffer = ByteBuffer.allocate(4);
        buffer.asIntBuffer().put(value);
        for(int i=0;i<4;i++){
            b[i]= buffer.get();
        }
        return b;
    }
    public static long byte2uint(byte b[]) {
            return (long)b[3] & (long)255 | ((long)b[2] & (long)255) << 8 | ((long)b[1] & (long)255) << 16 | ((long)b[0] & (long)255) << 24;
    }
    public static byte[] uint2byte(long value) {
            byte b[] = new byte[4];
            b[0] = (byte)(int)(value >> 24);
            b[1] = (byte)(int)(value >> 16);
            b[2] = (byte)(int)(value >> 8);
            b[3] = (byte)(int)value;
            return b;
        }
    public static String byte2String(byte[] b){
        return new String(b);
    }
    public static byte[] getSubByte(byte[] buffer,int from,int len){
        if(from+len>buffer.length){

            len=buffer.length-from;
        }
        byte[] b = new byte[len];
        for(int i=0;i<len;i++){
            b[i]= buffer[i+from];
        }
        return b;

    }
    public static void setSubByte(byte[] dest, byte[] src,int from,int len){
        if(dest==null){
            return;
        }
        if(from+len>dest.length){
            return;
        }

        if(src!=null){
            for(int i=0;i<len;i++){
                if(i>=src.length){
                    dest[i+from]=0;
                }else{
                    dest[i+from]=src[i];
                }

            }
        }else{
            for(int i=0;i<len;i++){
                dest[i+from]=0;
            }
        }

    }
}

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Spring 2.0 AOP 与事务配置 | oracle存储过程基本方法

• 2007-11-02 10:50
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