类似于asp中htmlencode函数的jsp函数

类似于asp中htmlencode函数的jsp函数 ( 2006-10-17 17:10 )

类似于asp中htmlencode函数的jsp函数


这是在其它网上发现的,虽不是经典代码,但也是值得借用的.(注:未经测试)
public static String asHTML(String text)
{
if (text == null)
return "";
StringBuffer results = null;
char[] orig = null;
int beg = 0, len = text.length();
for (int i = 0; i < len; ++i)
{
char c = text.charAt(i);
switch (c){
case 0:
case '&':
case '<':
case '>':
case '"':
if (results == null)
{
orig = text.toCharArray();
results = new StringBuffer(len+10);
}
if (i > beg)
results.append(orig, beg, i-beg);
beg = i + 1;
switch (c)
{
default: // case 0:
continue;
case '&':
results.append("&");
break;
case '<':
results.append("<");
break;
case '>':
results.append(">");
break;
case '"':
results.append(""");
break;
}
break;
}
}
if (results == null)
return text;
results.append(orig, beg, len-beg);
return results.toString();
}