package com.cabletech.common.util;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.Map;
import java.util.StringTokenizer;
/**
* 字符串处理类
*
* @author wangt
*
*/
public class StringUtil {
/**
* 计算字符串的长度
*
* @param strExp
* 字符串
* @return
*/
public static synchronized int length(String strExp) {
return strExp.getBytes().length;
}
/**
* 获取字符串左边指定个数字符组成的字符串
*
* @param strExp
* String
* @param intLen
* int
*/
public static synchronized String left(String strExp, int intLen) {
if (intLen <= 0)
return "";
if (length(strExp) <= intLen)
return strExp;
if (length(strExp) == strExp.length())
return strExp.substring(0, intLen);
int intCLoop = 0;
int intBLoop = 0;
byte abytTemp[] = strExp.getBytes();
while (true) {
if (abytTemp[intBLoop] > 127 || abytTemp[intBLoop] < 0) {
if (intBLoop + 2 > intLen) {
break;
} else {
intBLoop++;
intBLoop++;
}
} else {
if (intBLoop + 1 > intLen) {
break;
} else {
intBLoop++;
}
}
intCLoop++;
}
return strExp.substring(0, intCLoop);
}
/**
* 根据月份重组str
*
* @param month
* String
* @return
*/
public static String getMonth(String month) {
if (Integer.parseInt(month) < 10) {
return "0" + month;
} else
return month;
}
/**
* 获取给定字符串指定位数的右边的字符串
*
* @param strExp
* String
* @param intLen
* int
* @return
*/
public static synchronized String right(String strExp, int intLen) {
if (intLen <= 0)
return "";
if (length(strExp) <= intLen)
return strExp;
if (length(strExp) == strExp.length())
return strExp.substring(strExp.length() - intLen);
int intCLoop = 0;
int intBLoop = 0;
byte abytTemp[] = strExp.getBytes();
while (intBLoop < length(strExp) - intLen) {
if (abytTemp[intBLoop] > 127 || abytTemp[intBLoop] < 0) {
intBLoop++;
intBLoop++;
} else {
intBLoop++;
}
intCLoop++;
}
return strExp.substring(intCLoop);
}
/**
* 获取子串
*
* @param strExp
* String
* @param intFrom
* int
* @return
*/
public static synchronized String substring(String strExp, int intFrom) {
if (intFrom <= 0)
return strExp;
if (length(strExp) <= intFrom)
return "";
int intCLoop = 0;
int intBLoop = 0;
byte abytTemp[] = strExp.getBytes();
while (true) {
if (abytTemp[intBLoop] > 127 || abytTemp[intBLoop] < 0) {
if (intBLoop + 2 > intFrom) {
break;
} else {
intBLoop++;
intBLoop++;
}
} else {
if (intBLoop + 1 > intFrom) {
break;
} else {
intBLoop++;
}
}
intCLoop++;
}
return strExp.substring(intCLoop);
}
/**
* 获取子串
*
* @param strExp
* String
* @param intFrom
* int
* @param intLen
* int
* @return
*/
public static synchronized String substring(String strExp, int intFrom,
int intLen) {
if (intLen <= 0)
return "";
strExp = substring(strExp, intFrom);
if (strExp.length() > 0) {
strExp = left(strExp, intLen);
}
return strExp;
}
/**
* indexOf
*
* @param strExp
* String
* @param strSub
* String
* @return
*/
public static synchronized int indexOf(String strExp, String strSub) {
int intTemp = strExp.indexOf(strSub);
if (intTemp <= 0 || length(strExp) == strExp.length())
return intTemp;
int intCLoop = 0;
int intBLoop = 0;
byte abytTemp[] = strExp.getBytes();
while (intCLoop < intTemp) {
if (abytTemp[intBLoop] > 127 || abytTemp[intBLoop] < 0) {
intBLoop++;
intBLoop++;
} else {
intBLoop++;
}
intCLoop++;
}
return intBLoop;
}
/**
* 获取子串的位置
*
* @param strExp
* String
* @param strSub
* String
* @param intFrom
* int
*/
public static synchronized int indexOf(String strExp, String strSub,
int intFrom) {
intFrom = intFrom < 0 ? 0 : intFrom;
if (length(strExp) < intFrom)
return -1;
if (length(strExp) == strExp.length())
return strExp.indexOf(strSub, intFrom);
int intCLoop = 0;
int intBLoop = 0;
byte abytTemp[] = strExp.getBytes();
while (true) {
if (abytTemp[intBLoop] > 127 || abytTemp[intBLoop] < 0) {
if (intBLoop + 2 > intFrom) {
break;
} else {
intBLoop++;
intBLoop++;
}
} else {
if (intBLoop + 1 > intFrom) {
break;
} else {
intBLoop++;
}
}
intCLoop++;
}
intFrom = intCLoop;
int intTemp = strExp.indexOf(strSub, intFrom);
if (intTemp <= 0)
return intTemp;
intCLoop = 0;
intBLoop = 0;
while (intCLoop < intTemp) {
if (abytTemp[intBLoop] > 127 || abytTemp[intBLoop] < 0) {
intBLoop++;
intBLoop++;
} else {
intBLoop++;
}
intCLoop++;
}
return intBLoop;
}
/**
* 获取子串的最后一个位置
*
* @param strExp
* String
* @param strSub
* String
* @return
*/
public static synchronized int lastIndexOf(String strExp, String strSub) {
int intTemp = strExp.lastIndexOf(strSub);
if (intTemp <= 0 || length(strExp) == strExp.length())
return intTemp;
int intCLoop = 0;
int intBLoop = 0;
byte abytTemp[] = strExp.getBytes();
while (intCLoop < intTemp) {
if (abytTemp[intBLoop] > 127 || abytTemp[intBLoop] < 0) {
intBLoop++;
intBLoop++;
} else {
intBLoop++;
}
intCLoop++;
}
return intBLoop;
}
/**
* 用指定字符串替换原来的字符串
*
* @param strExp
* String
* @param strFind
* String
* @param strRep
* String
* @return String
*/
public static synchronized String replace(String strExp, String strFind,
String strRep) {
int intFrom, intTo;
String strHead, strTail;
if (strFind == null || strFind.length() == 0)
return strExp;
intFrom = strExp.indexOf(strFind, 0);
while (intFrom >= 0) {
intTo = intFrom + strFind.length();
strHead = strExp.substring(0, intFrom);
strTail = strExp.substring(intTo);
strExp = strHead + strRep + strTail;
intTo = intFrom + strRep.length();
intFrom = strExp.indexOf(strFind, intTo);
}
return strExp;
}
/**
* 去除字串左侧开始的空格
*
* @param strExp
* String
* @param strTrim
* String
* @return String
*/
public static synchronized String ltrim(String strExp, String strTrim) {
int i;
if (strExp == null || strExp.length() == 0) {
strExp = "";
}
if (strTrim == null || strTrim.length() == 0)
return strExp;
char chrTrim = strTrim.charAt(0);
for (i = 0; i < strExp.length(); i++) {
if (strExp.charAt(i) != chrTrim) {
break;
}
}
return strExp.substring(i);
}
/**
* 去除字串右侧结尾处的空格
*
* @param strExp
* String
* @param strTrim
* String
* @return String
*/
public static synchronized String rtrim(String strExp, String strTrim) {
int i;
if (strExp == null || strExp.length() == 0) {
strExp = "";
}
int intLen = strExp.length();
if (strTrim == null || strTrim.length() == 0)
return strExp;
char chrTrim = strTrim.charAt(0);
for (i = 0; i < strExp.length(); i++) {
if (strExp.charAt(intLen - i - 1) != chrTrim) {
break;
}
}
return strExp.substring(0, intLen - i);
}
/**
* 去掉空格
*
* @param strExp
* String
* @return
*/
public static synchronized String trim(String strExp) {
return trim(strExp, " ");
}
/**
* 去掉空格
*
* @param strExp
* String
* @param strTrim
* String
* @return String
*/
public static synchronized String trim(String strExp, String strTrim) {
return ltrim(rtrim(strExp, strTrim), strTrim);
}
/**
* 进行左填充
*
* @param strExp
* String
* @param intLen
* int
* @param strPad
* String
* @return String
*/
public static synchronized String lpad(String strExp, int intLen,
String strPad) {
if (strExp == null) {
strExp = "";
}
while (strExp.length() < intLen) {
strExp = strPad + strExp;
}
return right(strExp, intLen);
}
/**
* 进行右填充
*
* @param strExp
* String
* @param intLen
* int
* @param strPad
* String
* @return String
*/
public static synchronized String rpad(String strExp, int intLen,
String strPad) {
if (strExp == null) {
strExp = "";
}
while (strExp.length() < intLen) {
strExp = strExp + strPad;
}
return left(strExp, intLen);
}
/**
* 在HTML中显示文本信息（替换& " < > 四种字符为HTML中的字符显示格式）
*
* @param strExp
* String
* @return String
*/
public static synchronized String HtmlString(String strExp) {
if (strExp == null || strExp.length() == 0)
return "";
strExp = replace(strExp, "&", "&");
strExp = replace(strExp, "<", "<");
strExp = replace(strExp, ">", ">");
strExp = replace(strExp, "\"", """);
strExp = replace(strExp, " ", " ");
return strExp;
}
/**
* 转换文本字串为HTML字串
*
* @param strExp
* String
*/
public static synchronized String HtmlStringFromText(String strExp) {
return HtmlStringFromText(strExp, "");
}
// Transfer text string into html format
/**
* 转换文本字串为HTML字串
*
* @param strExp
* String
* @param strPad
* String
*/
public static synchronized String HtmlStringFromText(String strExp,
String strPad) {
if (strExp == null || strExp.length() == 0)
return strPad;
strExp = replace(strExp, "&", "&");
strExp = replace(strExp, "<", "<");
strExp = replace(strExp, ">", ">");
strExp = replace(strExp, "\"", """);
strExp = replace(strExp, "\r\n", "<br>\r\n");
return strExp;
}
// Get data from database, and put it into JSP file as a display string
/**
* 转换文本字串为HTML字串
*
* @param strExp
* String
* @param strPad
* String
*/
public static synchronized String HtmlString(String strExp, String strPad) {
if (strExp == null || strExp.trim().length() == 0)
return strPad;
strExp = strExp.trim();
strExp = HtmlString(strExp);
return strExp;
}
/**
* 在HTML中显示文本信息（替换& " < >四种字符为HTML中的字符显示格式）
*
* @param strExp
* String
* @return String
*/
public static synchronized String ShowTextArea(String strExp) {
if (strExp == null || strExp.length() == 0) {
return "";
}
strExp = replace(strExp, "&", "&");
strExp = replace(strExp, "<", "<");
strExp = replace(strExp, ">", ">");
strExp = replace(strExp, "\"", """);
return strExp;
}
/**
* 在HTML中显示文本信息（替换\ "两种字符为HTML中的字符显示格式）
*
* @param strExp
* String
* @return String
*/
public static synchronized String SpecString(String strExp) {
if (strExp == null || strExp.length() == 0) {
return "";
}
strExp = replace(strExp, "\\", "\\\\");
strExp = replace(strExp, "\"", "\\\"");
return strExp;
}
/**
* 将用;号分隔的字符串转换为字符串数组
*
* @param strExp
* String
* @return String[]
*/
public static synchronized String[] getAccountInfoString(String strExp) {
if (strExp == null || strExp.length() == 0) {
return null;
}
StringTokenizer st = new StringTokenizer(strExp, ";");
String[] strTemp = new String[2];
strTemp[1] = "";
int i = 0;
while (st.hasMoreTokens()) {
strTemp[i++] = st.nextToken();
}
return strTemp;
}
/**
* List 转换为 String <br>
* 转换的string 类型主要用于sql中。
*
* @param strList
* List<String>
* @return String
*/
public static String listStr4Sql(List<String> strList) {
String listString = strList.toString();
listString = listString.replace('[', '\'');
listString = listString.replaceAll(", ", "','");
listString = listString.replace(']', '\'');
return listString;
}
/**
* 将map的字符串显示换为,号分隔的字符串
*
* @param strmap
* Map<String, String>
* @return String
*/
public static String map2StrSql(Map<String, String> strmap) {
String mapstring = strmap.toString();
mapstring = mapstring.replace('{', '\'');
mapstring = mapstring.replaceAll(", ", "','");
mapstring = mapstring.replaceAll("=", "','");
mapstring = mapstring.replace('}', '\'');
return mapstring + ",''";
}
/**
* 将字符串数组转换成,号分隔的字符串
*
* @param array
* String[]
* @return String
*/
public static String array2String(String[] array) {
return list2StringComma(Arrays.asList(array));
}
/**
* 将数值型字符串转换成Integer型
*
* @since 1.0
* @param str
* String 需要转换的字符型字符串
* @param ret
* Integer 转换失败时返回的值
* @return 成功则返回转换后的Integer型值；失败则返回ret
*/
public static Integer String2Integer(String str, Integer ret) {
try {
return Integer.parseInt(str);
} catch (NumberFormatException e) {
return ret;
}
}
/**
* 将list数组转换为以逗号分隔的字符串 例如：sohu,sina,google,baidu,
*
* @param list
* <String>
* @return
*/
public static String list2StringComma(List<String> list) {
return list2String(list, ",");
}
/**
* 将list以#（pound）进行分隔 例如：sohu#sina#google#baidu#
*
* @param list
* List<String>
* @return String
*/
public static String list2StringPound(List<String> list) {
return list2String(list, "#");
}
/**
* 将数组切割成以指定分隔符分隔的字符串
*
* @param list
* 数组
* @param separator
* 分隔符
* @return
*/
public static String list2String(List<String> list, String separator) {
StringBuilder strs = new StringBuilder();
int i = 1;
int size = list.size();
for (String str : list) {
strs.append(str);
if (i < size) {
strs.append(separator);
}
i++;
}
return strs.toString();
}
/**
* 将以指定分隔符分隔的字符串，重组为数组
*
* @param str
* 以指定分隔符分隔的字符串
* @param separator
* 分隔符
* @return
*/
public static List<String> string2List(String str, String separator) {
List<String> list = new ArrayList<String>();
if (str != null) {
StringTokenizer st = new StringTokenizer(str, separator);
while (st.hasMoreTokens()) {
list.add(st.nextToken());
}
}
return list;
}
/**
* 将以#号分隔的字符串，重组成数组
*
* @param str
* String
* @return
*/
@SuppressWarnings("rawtypes")
public static List string2ListPound(String str) {
return StringUtil.string2List(str, "#");
}
/**
* 获得合适于select_options的字符串
*
* @param ls
* List 转换的list
* @return String
*/
public static String selectedOtionsAjaxStr(List<Map<String, Object>> ls) {
StringBuffer buf = new StringBuffer();
Map<String, Object> map = null;
for (int i = 0; i < ls.size(); i++) {
map = ls.get(i);
buf.append(map.get("ID"));
buf.append(",");
buf.append(map.get("NAME"));
if (i < ls.size() - 1) {
buf.append(";");
}
}
return buf.toString();
}
}