学JSP时,写了一些工具函数因为不太会用JAVA下的正则表达式也只能这么写啦!发出来让大家批评批评提点意见!有几个函数不算是自己写的希望爱挑剌的朋友嘴下留情!我是新手我怕谁,脸皮不行的人水平也上不去呀.嘻嘻..

package mxzc.web.strctrl;
public class StringCtrl
{/********************************************
public synchronized String HTMLcode(String TXTcode) 功能:文本替换
public synchronized String Unhtmlcode(String str) 功能:(不完全)反文本替换
public synchronized String Unhtmlcodea(String str) 功能:反文本替换
public synchronized boolean emailcheck (String email) 功能:检查一个字符串是否符合E-Mail
public synchronized boolean isemailstr(String email) 功能:检查一个字符串是否符合E-Mail
public synchronized boolean isqqstr(String qq) 功能:检查一个字符串是否符合QQ
public synchronized boolean isnumstr(String num) 功能:检查一个字符串是否为一数字串
public synchronized String userstrlow(String user) 功能:替换用户名中不合法的部分
public synchronized boolean userstrchk(String user) 功能:检查字符串是否符合用户名法则
public synchronized boolean istelstr(String tel) 功能:检查字符串是否为TEL
public synchronized boolean urlcheck(String url) 功能:检查字符串是否为URL
public synchronized String isotogbk(String iso) 功能:ISO9006-1码转换为GBK
public synchronized String gbktoiso(String gbk) 功能:GBK码转换为ISO9006-1
public synchronized String dostrcut(String oldstr,int length) 功能:按汉字长换行(英文按半个字长)
public synchronized String inttodateshow(int datenum) 功能:将1900年至时间的秒数换为日期字符串
public synchronized String nowdateshow() 功能:显示当前日期
public synchronized java.util.Date inttodate(int datenum) 功能:将秒数转换为日期
public synchronized int datetoint() 功能:将时间换为从1900年至今的秒数
public synchronized int datetoint(java.util.Date d) 功能:将时间换为从1900年至时间的秒数
public synchronized String overlengthcut(String str,int length) 功能:截取前几个字符,单位为汉字字长
public synchronized String replace(String str,String suba,String subb) 功能:字符串替换
*********************************************/
private static final String isostr="ISO8859-1";
private static final String gbkstr="GBK";
public StringCtrl()
{
}
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,"&","&amp;");
newstr=replace(newstr,""","&quot;");
newstr=replace(newstr," ","&nbsp;");
newstr=replace(newstr,"<","&lt;");
newstr=replace(newstr,">","&gt;");
newstr=replace(newstr,"\'","&#00039;");
return newstr;
}
public synchronized String Unhtmlcode(String str)
{
String newstr="";
if(str==null)return "";
if(str.length()<1)return "";
newstr=str;
newstr=replace(newstr,"&amp;","&");
//newstr=replace(newstr,"&quot;",""");
newstr=replace(newstr,"&nbsp;"," ");
newstr=replace(newstr,"&quot;",""");
//newstr=replace(newstr,"&lt;","<");
//newstr=replace(newstr,"&gt;",">");
newstr=replace(newstr,"&#00039;","\'");
return newstr;
}
public synchronized String Unhtmlcodea(String str)
{
String newstr="";
if(str==null)return "";
if(str.length()<1)return "";
newstr=str;
newstr=replace(newstr,"&amp;","&");
newstr=replace(newstr,"&quot;",""");
newstr=replace(newstr,"&nbsp;"," ");
newstr=replace(newstr,"&lt;","<");
newstr=replace(newstr,"&gt;",">");
newstr=replace(newstr,"&#00039;","\'");
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;
}
}
}