Useful String Functions

function | String in JSP, unlike PHP, there are many ready-made string processing functions, in the JSP you need to write, the following is a few commonly used functions, very useful!

-------------------------------
Chinese processing function: GETSTR
public string Getstr (string string) {
try{
String temp_p=string;
Byte[] Temp_t=temp_p.getbytes ("iso8859-1");
String Temp=new string (temp_t);
return temp;
}catch (Exception e) {}
return "NULL";
}

------------------------------------
String substitution function: In line, replace oldstring with newstring
public string Replace (string line, String oldstring, String newstring)
{
int i=0;
if ((I=line.indexof (oldstring, i)) >= 0) {
char [] line2 = Line.tochararray ();
char [] newString2 = Newstring.tochararray ();
int olength = Oldstring.length ();
StringBuffer buf = new StringBuffer (line2.length);
Buf.append (line2, 0, I). Append (NewString2);
i + = olength;
int j = i;
while ((I=line.indexof (oldstring, i)) > 0) {
Buf.append (Line2, J, I-j). Append (NewString2);
i + = olength;
j = i;
}
Buf.append (Line2, J, Line2.length-j);
return buf.tostring ();
}
return line;
}
A practical use is to replace the "\ r \ n" return characters to "<br>"

-------------------------------------------
The following function can replace ' < ' with ' < ', which can be used to publish HTML source code
public string escapehtml (string input) {
if (input==null| | Input.length () ==0)
return input;
StringBuffer buf=new StringBuffer (input.length () +6);
Char ch= ' a ';
for (int i=0;i<input.length (); i++) {
Ch=input.charat (i);
if (ch== ' < ') {
Buf.append ("<");
}
else if (ch== ' > ') {
Buf.append (">");
}
else{
Buf.append (CH);
}
}
return buf.tostring ();
}