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Java 通用字符處理類

代碼實例：

package cn.edu.hbcit.ips.util; public class CommenBean { /******************************************** public synchronized String HTMLcode(String TXTcode) 功能:文本替換 public synchronized String Unhtmlcode(String str) 功能:(不完全)反文本替換 public synchronized String Unhtmlcodea(String str) 功能:反文本替換 public synchronized boolean emailcheck (String email) 功能:檢查一個字符串是否符合E-Mail public synchronized boolean isemailstr(String email) 功能:檢查一個字符串是否符合E-Mail public synchronized boolean isqqstr(String qq) 功能:檢查一個字符串是否符合QQ public synchronized boolean isnumstr(String num) 功能:檢查一個字符串是否為一數字串 public synchronized String userstrlow(String user) 功能:替換用戶名中不合法的部分 public synchronized boolean userstrchk(String user) 功能:檢查字符串是否符合用戶名法則 public synchronized boolean istelstr(String tel) 功能:檢查字符串是否為TEL public synchronized boolean urlcheck(String url) 功能:檢查字符串是否為URL public synchronized String isotogbk(String iso) 功能:ISO9006-1碼轉換為GBK public synchronized String gbktoiso(String gbk) 功能:GBK碼轉換為ISO9006-1 public synchronized String dostrcut(String oldstr,int length) 功能:按漢字長換行(英文按半個字長) public synchronized String inttodateshow(int datenum) 功能:將1900年至時間的秒數換為日期字符串 public synchronized String nowdateshow() 功能:顯示當前日期 public synchronized java.util.Date inttodate(int datenum) 功能:將秒數轉換為日期 public synchronized int datetoint() 功能:將時間換為從1900年至今的秒數 public synchronized int datetoint(java.util.Date d) 功能:將時間換為從1900年至時間的秒數 public synchronized String overlengthcut(String str,int length) 功能:截取前幾個字符,單位為漢字字長 public synchronized String replace(String str,String suba,String subb) 功能:字符串替換 *********************************************/ private static final String isostr = "ISO8859-1"; private static final String gbkstr = "GBK"; public CommenBean() { } public synchronized boolean emailcheck(String email) { if (email == null) { return false; } if (email.length() < 6) { return false; } if (email.indexOf("@") < 2) { return false; } if (email.indexOf(".") < 4) { return false; } if (email.endsWith(".") || email.endsWith("@")) { return false; } if (email.lastIndexOf("@") > email.lastIndexOf(".") - 1) { return false; } if (email.lastIndexOf("@") != email.indexOf("@")) { return false; } String[] lowstr = { "/'", "/"", "/n", "&", "/t", "/r", "<", ">", "/", "//", "#"}; for (int i = 0; i < lowstr.length; i++) { if (email.indexOf("lowstr") > 0) { return false; } } return true; } public synchronized boolean isemailstr(String email) { if (email == null) { return false; } if (email.indexOf("@") == -1 || email.indexOf(".") == -1 || email.length() < 6) { return false; } return true; } public synchronized boolean isqqstr(String qq) { if (qq == null) { return false; } if (qq.length() > 12) { return false; } if (qq.length() < 5) { return false; } for (int i = 0; i < qq.length(); i++) { if (!(((int) qq.charAt(i)) <= 57 && ((int) qq.charAt(i)) >= 48)) { return false; } } return true; } public synchronized boolean isnumstr(String num) { if (num == null) { return false; } if (num.length() < 1) { return false; } for (int i = 0; i < num.length(); i++) { if (!(((int) num.charAt(i)) <= 57 && ((int) num.charAt(i)) >= 48)) { return false; } } return true; } public synchronized String userstrlow(String user) { String newuserstr = user.trim(); char[] lowstr = { '/'', '/"', '/n', '&', '/t', '/r', '<', '>', '/', '//', '#'}; for (int i = 0; i < lowstr.length; i++) { newuserstr = newuserstr.replace(lowstr[i], '+'); } return newuserstr; } public synchronized boolean userstrchk(String user) { String newuserstr = user.trim(); char[] lowstr = { '/'', '/"', '/n', '&', '/t', '/r', '<', '>', '/', '//', '#', '~', '`', '!', '@', '$', '%', '^', '*', '(', ')', '-', '_', '+', '=', '|', '?', ',', ';', '.'}; for (int i = 0; i < lowstr.length; i++) { newuserstr = newuserstr.replace(lowstr[i], '+'); } return (user.equals(newuserstr)) ? true : false; } public synchronized boolean istelstr(String tel) { if (tel == null) { return false; } if (tel.length() < 1) { return false; } if (tel.length() > 32) { return false; } for (int i = 0; i < tel.length(); i++) { if (!(((int) tel.charAt(i)) <= 57 && ((int) tel.charAt(i)) >= 48)) { if (tel.charAt(i) != '-') { return false; } } } return true; } public synchronized boolean urlcheck(String url) { if (url == null) { return false; } if (url.length() < 10) { return false; } String urls = url.toLowerCase(); if (!urls.startsWith("http://")) { return false; } if (url.indexOf("<") > 0 || url.indexOf(">") > 0) { return false; } return true; } public synchronized String isotogbk(String iso) throws Exception { if (iso != null) { return (new String(iso.getBytes(isostr), gbkstr)); } if (iso.length() < 1) { return ""; } return null; } public synchronized String gbktoiso(String gbk) throws Exception { if (gbk != null) { return (new String(gbk.getBytes(gbkstr), isostr)); } if (gbk.length() < 1) { return ""; } return null; } public synchronized String HTMLcode(String TXTcode) { String newstr = ""; if (TXTcode == null) { return ""; } newstr = TXTcode; newstr = replace(newstr, "&", "&"); newstr = replace(newstr, "/"", """); newstr = replace(newstr, " ", ""); newstr = replace(newstr, "<", "<"); newstr = replace(newstr, ">", ">"); newstr = replace(newstr, "/'", "'"); return newstr; } public synchronized String Unhtmlcode(String str) { String newstr = ""; if (str == null) { return ""; } if (str.length() < 1) { return ""; } newstr = str; newstr = replace(newstr, "&", "&"); //newstr=replace(newstr,""","/""); newstr = replace(newstr, "", " "); newstr = replace(newstr, """, "/""); //newstr=replace(newstr,"<","<"); //newstr=replace(newstr,">",">"); newstr = replace(newstr, "'", "/'"); return newstr; } public synchronized String Unhtmlcodea(String str) { String newstr = ""; if (str == null) { return ""; } if (str.length() < 1) { return ""; } newstr = str; newstr = replace(newstr, "&", "&"); newstr = replace(newstr, """, "/""); newstr = replace(newstr, "", " "); newstr = replace(newstr, "<", "<"); newstr = replace(newstr, ">", ">"); newstr = replace(newstr, "'", "/'"); return newstr; } public synchronized String dostrcut(String oldstr, int length) { int i = 0; int j = 0; int k = 0; String newstr = ""; if (oldstr == null) { return ""; } if (length <= 0) { return ""; } for (i = 0; i < oldstr.length(); i++) { if (oldstr.charAt(i) == '/n') { j = 0; } else if (((int) (oldstr.charAt(i))) > 255) { j += 2; } else { j++; } if ((j / 2) >= length) { newstr = newstr.concat(oldstr.substring(k, i) + "/n"); k = i;j = 0; } } newstr = newstr.concat(oldstr.substring(k) + "/n"); return newstr; } public synchronized String inttodateshow(int datenum) { int year = 0; int month = 0; int day = 0; int hour = 0; int minute = 0; int second = 0; String datestr = ""; java.util.Date d; d = new java.util.Date((long) (datenum) * 1000); java.util.Calendar ds = java.util.Calendar.getInstance(); ds.setTime(d); year = ds.get(java.util.Calendar.YEAR); month = ds.get(java.util.Calendar.MONTH); day = ds.get(java.util.Calendar.DATE); hour = ds.get(java.util.Calendar.HOUR_OF_DAY); minute = ds.get(java.util.Calendar.MINUTE); second = ds.get(java.util.Calendar.SECOND); datestr = Integer.toString(year) + "/" + Integer.toString(1 + month) + "/" + Integer.toString(day); return datestr; } public synchronized String nowdateshow() { int year = 0; int month = 0; int day = 0; int hour = 0; int minute = 0; int second = 0; String datestr = ""; java.util.Calendar ds = java.util.Calendar.getInstance(); year = ds.get(java.util.Calendar.YEAR); month = ds.get(java.util.Calendar.MONTH); day = ds.get(java.util.Calendar.DATE); hour = ds.get(java.util.Calendar.HOUR_OF_DAY); minute = ds.get(java.util.Calendar.MINUTE); second = ds.get(java.util.Calendar.SECOND); datestr = Integer.toString(year) + "/" + Integer.toString(1 + month) + "/" + Integer.toString(day); return datestr; } public synchronized java.util.Date inttodate(int datenum) { int year = 0; int month = 0; int day = 0; String datestr = ""; java.util.Date d; d = new java.util.Date((long) (datenum) * 1000); return d; } public synchronized int datetoint() { java.util.Date d = null; long ds = 0; d = new java.util.Date(); ds = d.getTime(); return (int) (ds / 1000); } public synchronized int datetoint(java.util.Date d) { long ds = 0; ds = d.getTime(); return (int) (ds / 1000); } public synchronized String overlengthcut(String str, int length) { int i = 0; int j = 0; if (str == null) { return ""; } if (length < 0) { return ""; } if (str.length() <= length) { return str; } for (i = 0; i < str.length(); i++) { if (((int) (str.charAt(i))) > 255) { j += 2; } else { j++; } if ((j / 2) >= length) { return str.substring(0, i); } } return str; } public synchronized String replace(String str, String suba, String subb) { String newstr = ""; int start = 0; int offset = 0; int subalength = 0; int strlength = 0; if (str == null || suba == null || subb == null) { return str; } if (suba.equals(subb)) { return str; } if (str.length() < suba.length() || str.length() < subb.length()) { return str; } if (str.length() > 0 && suba.length() > 0 && subb.length() > 0) { subalength = suba.length(); strlength = str.length(); while (true) { if (str.indexOf(suba) < 0) { break; } if (offset > strlength) { break; } start = str.indexOf(suba, offset); if (start < offset) { break; } newstr = newstr.concat(str.substring(offset, start)); newstr = newstr.concat(subb); offset = start + subalength; } newstr = newstr.concat(str.substring(offset)); return newstr; } else { return str; } } }

Java通用字符處理類