/*** 字符串操作功能类.*/public class StringUtil {
/** * 字符串替换函数,String的replace函数不能处理'|'符号 * * @param strSource 被替换的源字符串 * @param strFrom 要查找并替换的子字符串 * @param strTo 要替换为的子字符串 * @return 替换完成的字符串 */ public static String replace(String strSource, String strFrom, String strTo) {
String strDest = ""; int intFromLen = strFrom.length(); int intPos;
if (strFrom.equals("")) { return strSource; } while ((intPos = strSource.indexOf(strFrom)) != -1) { strDest = strDest + strSource.substring(0, intPos); strDest = strDest + strTo; strSource = strSource.substring(intPos + intFromLen); } strDest = strDest + strSource; return strDest; }
/** * 将普通字符串格式化成数据库认可的字符串格式 * * @param input 要格式化的字符串 * @return 合法的数据库字符串 */ public static String toSql(String input) { if (isEmpty(input)) { return ""; } else { return input.replaceAll("'", "''"); } }
/** * 截取字符串左侧指定长度的字符串 * * @param input 输入字符串 * @param count 截取长度 * @return 截取字符串 */ public static String left(String input, int count) { if (isEmpty(input)) { return ""; } count = (count > input.length()) ? input.length() : count; return input.substring(0, count); }
/** * 截取字符串右侧指定长度的字符串 * * @param input 输入字符串 * @param count 截取长度 * @return 截取字符串 */ public static String right(String input, int count) { if (isEmpty(input)) { return ""; } count = (count > input.length()) ? input.length() : count; return input.substring(input.length() - count, input.length()); }
/** * 从指定位置开始截取指定长度的字符串 * * @param input 输入字符串 * @param index 截取位置，左侧第一个字符索引值是1 * @param count 截取长度 * @return 截取字符串 */ public static String middle(String input, int index, int count) { if (isEmpty(input)) { return ""; } count = (count > input.length() - index + 1) ? input.length() - index + 1 : count; return input.substring(index - 1, index + count - 1); }
/** * Unicode转换成GBK字符集 * * @param input 待转换字符串 * @return 转换完成字符串 */ public static String UnicodeToGB(String input) throws UnsupportedEncodingException { if (isEmpty(input)) { return ""; } else { String s1; s1 = new String(input.getBytes("ISO8859_1"), "GBK"); return s1; } }
/** * GBK转换成Unicode字符集 * * @param input 待转换字符串 * @return 转换完成字符串 */ public static String GBToUnicode(String input) throws UnsupportedEncodingException { if (isEmpty(input)) { return ""; } else { String s1; s1 = new String(input.getBytes("GBK"), "ISO8859_1"); return s1; } }
/** * 分隔字符串成数组. * <p/> * 使用StringTokenizer，String的split函数不能处理'|'符号 * * @param input 输入字符串 * @param delim 分隔符 * @return 分隔后数组 */ public static String[] splitString(String input, String delim) { if (isEmpty(input)) { return new String[0]; } ArrayList al = new ArrayList(); for (StringTokenizer stringtokenizer = new StringTokenizer(input, delim); stringtokenizer.hasMoreTokens(); al.add(stringtokenizer.nextToken())) { } String result[] = new String[al.size()]; for (int i = 0; i < result.length; i++) { result[i] = (String) al.get(i); } return result; }
/** * 判断字符串数组中是否包含某字符串元素 * * @param substring 某字符串 * @param source 源字符串数组 * @return 包含则返回true，否则返回false */ public static boolean isIn(String substring, String[] source) { if (source == null || source.length == 0) { return false; } for (int i = 0; i < source.length; i++) { String aSource = source[i]; if (aSource.equals(substring)) { return true; } } return false; }
/** * 判断字符是否为空 * * @param input 某字符串 * @return 包含则返回true，否则返回false */ public static boolean isEmpty(String input) { return input == null || input.length() == 0; }
/** * 获得0-9的随机数 * * @param length * @return String */ public static String getRandomNumber(int length) { Random random = new Random(); StringBuffer buffer = new StringBuffer();
for (int i = 0; i < length; i++) { buffer.append(random.nextInt(10)); } return buffer.toString(); }
/** * 获得0-9的随机数 长度默认为10 * * @return String */ public static String getRandomNumber() { return getRandomNumber(10); }
/** * 获得0-9,a-z,A-Z范围的随机数 * @param length 随机数长度 * @return String */
public static String getRandomChar(int length) { char[] chr = {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z', 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z'};
Random random = new Random(); StringBuffer buffer = new StringBuffer(); for (int i = 0; i < length; i++) { buffer.append(chr[random.nextInt(62)]); } return buffer.toString(); }
public static String getRandomChar() { return getRandomChar(10); }
/** * * 获得13位当前年月日时秒分随机码13位做位主键 */ public static String getPrimaryKey() { Date now = new Date(); SimpleDateFormat dateformat = new SimpleDateFormat("yyyyMMddHHmmssSSS"); return dateformat.format(now) + getRandomChar(13); }/** * *做位主键选者主键长度 */ public static String getPrimaryKey(int index){ Date now = new Date(); SimpleDateFormat dateformat = new SimpleDateFormat("yyyyMMddHHmmssSSS"); String indexAppendZero = DigitalUtil.appendZero(index,4); return dateformat.format(now) + indexAppendZero + getRandomChar(9-indexAppendZero.length()); }
public static String filterHTML(String input) { StringBuffer filtered = new StringBuffer(); char c; for (int i = 0; i <= input.length() - 1; i++) { c = input.charAt(i); switch (c) { case '&': filtered.append("&"); break; case '<': filtered.append("<"); break; case '>': filtered.append(">"); break; case '"': filtered.append("""); break; case '\'': filtered.append("'"); break; default: filtered.append(c); } } return (filtered.toString()); }
public static void main(String[] args) { System.out.println(getPrimaryKey(5));
}
static public String prefixZoreFill(String sourceStr,int len){ int prefix = len - sourceStr.length();if (prefix<=0) return sourceStr;for (int i=0;i<prefix;i++ ){sourceStr = "0" + sourceStr;}return sourceStr;}
static public String replaceAll(String str, String regex, String replacement) {if (str==null || str.compareTo("")==0 || str.compareTo("null")==0){return str;}if (regex==null || regex.compareTo("null")==0){return str;}if (replacement==null || replacement.compareTo("null")==0){return str;}
try{int iIndex,iFromIndex;String stmp=new String();;int iLen = regex.length();
iFromIndex=0;iIndex=str.indexOf(regex,iFromIndex);stmp="";while (iIndex>=0) {stmp=stmp+str.substring(iFromIndex,iIndex)+replacement;str=str.substring(iIndex+iLen);iIndex=str.indexOf(regex,iFromIndex);}stmp=stmp+str;
return stmp;}catch(Exception e){return str;}}
static public int length(String str) {if (str==null || str.compareTo("")==0 || str.compareTo("null")==0) {return 0;}
int enLen=0;int chLen=0;char ch=' ';Character CH=new Character(' ');int iValue=0;
for(int i=0;i<str.length();i++) {ch=str.charAt(i);CH=new Character(ch);iValue=CH.charValue();if(iValue<128) {enLen++;}else{chLen++;}}
return (enLen + chLen/2);}
static public String substring(String str, int beginIndex, int endIndex) {if (str==null || str.compareTo("")==0 || str.compareTo("null")==0) {return "";}
String rtsValue=null;int enLen=0;int chLen=0;char ch=' ';Character CH=new Character(' ');int iValue=0;int iLength=0;int realBegin=0;int realEnd=0;int i=0;
while(iLength<beginIndex) {ch=str.charAt(i);CH=new Character(ch);iValue=CH.charValue();if(iValue<128) {enLen++;}else{chLen++;}iLength=enLen + chLen/2;i++;}
realBegin=enLen + chLen;
i=realBegin;while(iLength<endIndex) {ch=str.charAt(i);CH=new Character(ch);iValue=CH.charValue();if(iValue<128) {enLen++;}else{chLen++;}iLength=enLen + chLen/2;i++;}
realEnd=enLen + chLen;
rtsValue=str.substring(realBegin,realEnd);
return rtsValue;} /** * 计算最大编号 */ static public String max(Object obj){ SimpleDateFormat sf = new SimpleDateFormat("yyyyMMdd"); String strdate = sf.format(new Date());//当前日期20070802 String code="",codemax; if(obj == null){//数据库没有原始记录 code += strdate+"0001"; }else{ codemax = (String)obj; codemax = String.valueOf(Integer.parseInt(codemax) + 1); if(codemax.length() == 1) code += strdate+"000"+codemax; if(codemax.length() == 2) code += strdate+"00"+codemax; if(codemax.length() == 3) code += strdate+"0"+codemax; } return code; }
/** * 转换字符串为日期，格式"yyyy-MM-dd HH:mm:ss" * * @param date * 日期字符串 * @return 返回格式化的日期 */public static Date strToTime(String date) throws ParseException {SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");formatter.setLenient(false);return formatter.parse(date);}/** * 取得现在的日期，格式"yyyy-MM-dd HH:mm:ss" * * @return 返回格式化的日期字符串 */public static String getNow() {SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");Date Now = new Date();return formatter.format(Now);}}
