Character的常用工具类

package com.cmcc.flow.common.util;

import java.io.UnsupportedEncodingException;
import java.util.Map;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import javax.servlet.http.HttpServletRequest;

public class CharacterUtil {
/**
* 手机电话号码正则表达式
*/
private final static String MOBILE_PHONE_NUM_REGEXP="^1[3-8][0-9]{9}$";

private final static String EMAIL_ADDR_REGEXP="^\\w+((-\\w+)|(\\.\\w+))*@[A-Za-z0-9]+((\\.|-)[A-Za-z0-9]+)*\\.[A-Za-z0-9]+$" ;

public static String  stringTranscoding(String str){
if(str!=null && str.trim().length()>0 && str.trim()!=""){ //TODO:chendw 重复判断
try {
return new String(str.toString().getBytes("iso-8859-1"),"UTF-8");
} catch (UnsupportedEncodingException e) {
// TODO Auto-generated catch block
//				e.printStackTrace();
return null;
}
}
return str;
}

/**
* @throws UnsupportedEncodingException
*
* @Title: getStringFromRequest
* @Description: 得到请求参数
* @param @param request
* @param @param parameterName
* @param @return
* @return String
* @throws
*/
public static String getStringFromRequest(HttpServletRequest request,
String parameterName){
try {
request.setCharacterEncoding("utf-8");
} catch (UnsupportedEncodingException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
if(request==null || parameterName==null)
return null;

String szName = request.getParameter(parameterName);
//		if(szName!=null &&
//				request.getMethod().equalsIgnoreCase("get")){
//			try {
////				String szRequestCharset = request.getCharacterEncoding();
//				szName = new String(szName.getBytes("ISO-8859-1"), "UTF-8");
//			} catch (UnsupportedEncodingException e) {
//				// TODO Auto-generated catch block
//				//e.printStackTrace();
//				return null;
//			}
//		}

szName = trimStringSafe(szName);
return szName;
}

/**
*
* @Title: getStringFromRequest
* @Description: 从页面请求获取相应的参数，如果参数为空或者NULL，统一返回空字符
* @param @param request
* @param @param parameterName
* @param @return
* @return String
* @throws
*//*
public static String getStringFromRequest(HttpServletRequest request,
String parameterName)
{
try {
return getStringFromRequest(request, parameterName, null);
} catch (Exception e) {
// TODO: handle exception
e.printStackTrace();
return "";
}
}*/

public static String trimStringSafe(String oriString)
{
if(oriString!=null)
return oriString.trim();
return null;
}

public static String addQueryString(Map<String, String> queryParams, String oriString)
{
if(oriString==null || oriString.equals("")){
return "";
}

oriString+="?";
for(String szKey : queryParams.keySet()){
String szTmpString = szKey + "=" + queryParams.get(szKey);
oriString+=szTmpString;
oriString+="&";
}

int nLength = oriString.length();
return oriString.substring(0, nLength-1);
}

/**
*
* @Title: isNullOrEmpty
* @Description: 判断字符串是否为空值或空指针，如果是，抛出异常，并设置相应的异常信息
* @param @param str
* @param @param errorMsg
* @param @throws Exception
* @return void
* @throws
*/
public static void isNullOrEmpty(String str, String errorMsg)
throws Exception
{
if(str==null || str.isEmpty()){
Exception exception = new Exception(errorMsg);
throw exception;
}
}

/**
*
* @Title:isValidMobilePhone
* @Description: 判断一个字符串是否为有效的手机号码
* @param szMobilePhone
* @return
* @throws
*/
public static boolean isValidMobilePhone(String szMobilePhone){
return isValid(MOBILE_PHONE_NUM_REGEXP, szMobilePhone);
}

/**
*
* @Title:isValidEmailAddr
* @Description: 判断一个字符串是否为有效的邮箱地址
* @param szEmailAddr
* @return
* @throws
*/
public static boolean isValidEmailAddr(String szEmailAddr){
return isValid(EMAIL_ADDR_REGEXP, szEmailAddr);
}

/**
*
* @Title:isValid
* @Description: 通用的验证方法
* @param regExp
* @param szValue
* @return
* @throws
*/
public static boolean isValid(String regExp, String szValue){
Pattern p = Pattern.compile(regExp);
Matcher m = p.matcher(szValue);
return m.find();
}
}