package net.sc.common.util;/** * @author Aaron * @createTime 2013-05-06 * @desc 字符串解析工具类 */public class StringUtil {	public static synchronized String getStackTrace(Exception exception) {		StringBuffer sb = new StringBuffer();		sb.append(exception.getMessage());		sb.append("\r\n");		for (StackTraceElement stackTraceElement : exception.getStackTrace()) {			sb.append("        ");			sb.append(stackTraceElement.toString());			sb.append("\r\n");		}		return sb.toString();	}	public static synchronized Integer getNumber(String value, Integer defaultValue) {		Integer result = defaultValue;		try {			result = Integer.parseInt(value);		} catch (Exception e) {		}		return result;	}	public static String getFixLenNumStr(int len, int value, String fillStr) {		return getFixLenNumStr(len, value + "", fillStr);	}	public static synchronized String getFixLenNumStr(int len, String value, String fillStr) {		String resultValue = value;		while (resultValue.length() < len) {			resultValue = fillStr + resultValue;		}		return resultValue;	}	public static synchronized boolean isEmpty(String v) {		return v == null || v.trim().length() == 0;	}	public static synchronized String getNumber(String v) {		String ns = "";		for (int i = 0; i < v.length(); i++) {			try {				ns += Integer.parseInt(v.charAt(i) + "") + "";			} catch (Exception e) {			}		}		return ns;	}	public static synchronized String getNumber(String v, String defaultVal) {		String ns = getNumber(v);		if (ns == null || ns.length() == 0) {			ns = defaultVal;		}		return ns;	}	public static synchronized String decodeUnicode(String v) {		char aChar;		int len = v.length();		StringBuffer outBuffer = new StringBuffer(len);		for (int x = 0; x < len;) {			aChar = v.charAt(x++);			if (aChar == '\\') {				aChar = v.charAt(x++);				if (aChar == 'u') {					// Read the xxxx					int value = 0;					for (int i = 0; i < 4; i++) {						aChar = v.charAt(x++);						switch (aChar) {						case '0':						case '1':						case '2':						case '3':						case '4':						case '5':						case '6':						case '7':						case '8':						case '9':							value = (value << 4) + aChar - '0';							break;						case 'a':						case 'b':						case 'c':						case 'd':						case 'e':						case 'f':							value = (value << 4) + 10 + aChar - 'a';							break;						case 'A':						case 'B':						case 'C':						case 'D':						case 'E':						case 'F':							value = (value << 4) + 10 + aChar - 'A';							break;						default:							throw new IllegalArgumentException("Malformed   \\uxxxx   encoding.");						}					}					outBuffer.append((char) value);				} else {					if (aChar == 't')						aChar = '\t';					else if (aChar == 'r')						aChar = '\r';					else if (aChar == 'n')						aChar = '\n';					else if (aChar == 'f')						aChar = '\f';					outBuffer.append(aChar);				}			} else				outBuffer.append(aChar);		}		return outBuffer.toString();	}}