JSP中的字符替换函数 str_replace() 实现！

//
// StrReplace.java
//
package forum;
import java.util.*;

/**
* Title:
* Description:
* Copyright: Copyright (c) 2001
* Company:
* @author
* @version 1.0
*/

public class StrReplace {

public StrReplace() {
}
public String str_replace(String from,String to,String source)
{
StringBuffer bf= new StringBuffer("");
StringTokenizer st = new StringTokenizer(source,from,true);
while (st.hasMoreTokens())
{
String tmp = st.nextToken();
System.out.println("*"+tmp);
if(tmp.equals(from))
{
bf.append(to);
}
else
{
bf.append(tmp);
}
}
return bf.toString();
}
}


// 使用方法
<jsp:useBean id="replace" scope="page" class="forum.StrReplace" />
<%= replace.str_replace("<","^","<h1>123456</h1>") %>