jsp输入html标签

import java.io.*; 
public class Test{ 
public static String changeToHtml(String input) 
{ 
if(input == null || input.length() == 0) 
return ""; 
char c = ' '; 
StringBuffer sb = new StringBuffer(input.length()); 
for(int i = 0; i < input.length(); i++) 
{ 
c = input.charAt(i); 
if(c == ' ') 
{ 
sb.append("&nbsp;"); 
continue; 
} 
if(c == '<') 
{ 
sb.append("&lt;"); 
continue; 
} 
if(c == '>') 
{ 
sb.append("&gt;"); 
continue; 
} 
if(c == '/n'){ 
sb.append("<br> "); 
continue; 
} 
if(c == '&' ){ 
sb.append("&amp;"); 
continue; 
} 
else 
sb.append(c); 
} 
return sb.toString(); 
} 
public static String transform(String content) 
{ 
content=content.replaceAll("&","&amp;"); 
content=content.replaceAll("<","&lt;"); 
content=content.replaceAll(" ","&nbsp;"); 
content=content.replaceAll(">","&gt;"); 
content=content.replaceAll("/n","<br>"); 
return content; 
} 
public static void main(String []args){ 
BufferedReader bw; 
StringBuffer sb=new StringBuffer(""); 
String ss=""; 
long l=0; 
try{ 
File file=new File("G://novel//凡尔纳//海底两万里//001.HTM");//随意选的文件 
System.out.println(file.getPath().toString()); 
bw=new BufferedReader(new FileReader(file)); 
while((ss=bw.readLine())!=null){ 
System.out.println(ss); 
sb.append(ss); 
} 
bw.close(); 
for(int i=0;i<10;i++) sb.append(sb);//作一个大字串 
}catch(IOException e){} 

long a=0; 
long b=0; 

/*输出使用changeToHtml()所用时间 
*a=System.currentTimeMillis(); 
*changeToHtml(sb.toString()); 
*b=System.currentTimeMillis(); 
*System.out.println(b-a); 
*此处正常显示时间 
*/ 

/*输出使用transform()所用时间 
*a=System.currentTimeMillis(); 
*transform(sb.toString()); 
*b=System.currentTimeMillis(); 
*System.out.println(b-a); 
*发生内存溢出错误 
*/ 
} 
}