Codec工具类
import java.math.BigInteger; import org.apache.commons.codec.DecoderException; import org.apache.commons.codec.binary.Hex; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; /** * Codec工具类 * Integer.toHexString(),Long.toHexString(),BigInteger.toString(16)均无前导0,和Hex编码不一致,所以不直接用 */ public class CodecUtil {/** * 将字节数组编码为HEX编码的字符串 */ public static String encodeHex(byte[] dataBytes) { String dataString = null; dataString = new String(Hex.encodeHex(dataBytes)); return dataString; } /** * 将HEX编码的字符串解码为字节数组 */ public static byte[] decodeHex(String dataString) { byte[] dataBytes = null; if (dataString != null) { try { dataBytes = Hex.decodeHex(dataString.toCharArray()); } catch (DecoderException e) { logger.warn(e, e); } } return dataBytes; } /** * 以十六进制的无符号整数形式返回一个byte参数的字符串表示形式(有前导0) */ public static String toHexString(byte b) { String dataString = null; dataString = encodeHex(toByteArray(b)); return dataString; } /** * 以十六进制的无符号整数形式返回一个short参数的字符串表示形式(有前导0) */ public static String toHexString(short s) { String dataString = null; dataString = encodeHex(toByteArray(s)); return dataString; } /** * 以十六进制的无符号整数形式返回一个int参数的字符串表示形式(有前导0) */ public static String toHexString(int i) { String dataString = null; dataString = encodeHex(toByteArray(i)); return dataString; } /** * 以十六进制的无符号整数形式返回一个long参数的字符串表示形式(有前导0) */ public static String toHexString(long l) { String dataString = null; dataString = encodeHex(toByteArray(l)); return dataString; } /** * 以十六进制的无符号整数形式返回一个BigInteger参数的字符串表示形式(有前导0) */ public static String toHexString(BigInteger b) { String dataString = null; dataString = encodeHex(toByteArray(b)); return dataString; } /** * 返回一个字节数组,该数组包含此byte的二进制补码表示形式 */ public static byte[] toByteArray(byte b) { byte[] dataBytes = null; dataBytes = new byte[1]; dataBytes[0] = b; return dataBytes; } /** * 返回一个字节数组,该数组包含此short的二进制补码表示形式 */ public static byte[] toByteArray(short s) { byte[] dataBytes = null; dataBytes = new byte[2]; dataBytes[0] = (byte) ((s >>> 8) & 0xff); dataBytes[1] = (byte) (s & 0xff); return dataBytes; } /** * 返回一个字节数组,该数组包含此int的二进制补码表示形式 */ public static byte[] toByteArray(int i) { byte[] dataBytes = null; dataBytes = new byte[4]; dataBytes[0] = (byte) ((i >>> 24) & 0xff); dataBytes[1] = (byte) ((i >>> 16) & 0xff); dataBytes[2] = (byte) ((i >>> 8) & 0xff); dataBytes[3] = (byte) (i & 0xff); return dataBytes; } /** * 返回一个字节数组,该数组包含此long的二进制补码表示形式 */ public static byte[] toByteArray(long l) { byte[] dataBytes = null; dataBytes = new byte[8]; dataBytes[0] = (byte) ((l >>> 56) & 0xff); dataBytes[1] = (byte) ((l >>> 48) & 0xff); dataBytes[2] = (byte) ((l >>> 40) & 0xff); dataBytes[3] = (byte) ((l >>> 32) & 0xff); dataBytes[4] = (byte) ((l >>> 24) & 0xff); dataBytes[5] = (byte) ((l >>> 16) & 0xff); dataBytes[6] = (byte) ((l >>> 8) & 0xff); dataBytes[7] = (byte) (l & 0xff); return dataBytes; } /** * 返回一个字节数组,该数组包含此BigInteger的二进制补码表示形式 */ public static byte[] toByteArray(BigInteger b) { byte[] dataBytes = null; dataBytes = b.toByteArray(); return dataBytes; } /** * 根据EsmClass返回TpUdhi * @return */ public static int getTpUdhiFromEsmClass(int esmClass) { int tpUdhi = (esmClass & 0x40) >> 6; return tpUdhi; } /** * 根据TpUdhi返回EsmClass */ public static int getEsmClassFromTpUdhi(int tpUdhi) { int esmClass = tpUdhi << 6; return esmClass; } }