package?com.ls.utils;

import?javax.crypto.Cipher;
import?javax.crypto.SecretKey;
import?javax.crypto.spec.SecretKeySpec;



public?class?DESCommon?{
	
	????private?static?final?String?UTF8?=?“utf-8“;//字符編碼??	?????
	????private?static?final?String?ALGORITHM_DESEDE?=?“DESede“;//定義加密模式??
	????//private?static?String?key=PropertyCommon.readInfo（“com/ls/config/system-context.properties““system.basic.key“）;??
	????private?static?String?key=“1122334455667788“;
	????private?String?byte2HexStr（byte[]?paramArrayOfByte）
	????{
	??????StringBuilder?localStringBuilder?=?new?StringBuilder（）;
	??????for?（int?i?=?0;?i?	????????String?str?=?Integer.toHexString（paramArrayOfByte[i]?&?0xFF）;
	????????if?（str.length（）?==?1）?{
	??????????localStringBuilder.append（“0“）;
	????????}

	????????localStringBuilder.append（str.toUpperCase（））;
	??????}

	??????return?localStringBuilder.toString（）;
	????}
	????
	????/**?
	?????*?字符串轉字節數組?
	?????*/?
	????private?byte[]?str2ByteArray（String?s）?{?//只在解密中使用?
	????????int?byteArrayLength?=?s.length（）/2;??
	????????byte[]?b?=?new?byte[byteArrayLength];??
	????????for?（int?i?=?0;?i?	????????????byte?b0?=?（byte）?Integer.valueOf（s.substring（i*2?i*2+2）?16）.intValue（）;??
	????????????b[i]?=?b0;??
	????????}??	??????????
	????????return?b;??
	????}?
	??????
	????/**
	?????*?構造3DES加解密方法key?
	?????*??
	?????*/??
	????private?byte[]?build3DesKey（String?keyStr）?throws?Exception?{??
	????????byte[]?key?=?new?byte[24];??
	????????byte[]?temp?=?keyStr.getBytes（UTF8）;??
	????????if?（key.length?>?temp.length）?{??
	????????????System.arraycopy（temp?0?key?0?temp.length）;??
	????????}?else?{??
	????????????System.arraycopy（temp?0?key?0?key.length）;??
	????????}??	??????????
	????????return?key;??
	????}?
	????//加密方法
	??