wordcount.java

icsamples目录中有icsamples网络程序。 这个程序包括J2EE网络层的范例程序

package jwadbook.taglib;

import javax.servlet.*;
import javax.servlet.jsp.*;
import javax.servlet.jsp.tagext.*;
import java.util.*;
import java.io.*;

/**
 * Jian Cai
 */
public class WordCount extends TagSupport
{
    String inputname;
    boolean warnEmpty;
    String inputword;
    
    public void setInputname(String _inputname) {
        this.inputname = _inputname;
    }

    public void setWarnEmpty(boolean _warnempty) {
        this.warnEmpty = _warnempty;
    }

    public int doEndTag() throws JspException {
        JspWriter out = pageContext.getOut();
        inputword = pageContext.getRequest().getParameter(inputname);
        	try{
        if ((inputword==null)&&(warnEmpty==true))
        {
            out.println("<FONT color = 'red'> None Input Found! Input Again </FONT>");
        }
        else if (inputword==null)
        {
            out.println("0");
        }
        else
        {
            StringTokenizer st = new StringTokenizer(inputword);
            int wordnumber = st.countTokens();
            out.println(wordnumber);
        }
        } catch (IOException ioe) {
		System.out.println ("Error: " + ioe.getMessage());
	}
        return EVAL_PAGE;
    }
                
}