mytaglib.java

石志国著《JSP应用教程》

package mytaglib;
import java.io.*;
import javax.servlet.jsp.*;
import javax.servlet.jsp.tagext.*;
import java.util.Hashtable;
import java.io.Writer;
/*
* 下面自己定义的类MyTagLib
* 扩展了类javax.servlet.jsp.tagext.TagSupport
 */
public class MyTagLib extends TagSupport {
    private String name = "";
	
	public void setName(String name){
		this.name = name;
	}
	// 当自定义标记开始时会自动调用
    public int doStartTag() {
		try {
			JspWriter out = pageContext.getOut();
			out.print("HelloWorld, "+ name);
		} catch(IOException ioe) {
			System.out.println("Error in ExampleTag: " + ioe);
			return 1;
		}
		return 0;
	}

	// 当自定义标记结束时会自动调用	
	public int doEndTag() {
		try {
			JspWriter out = pageContext.getOut();
			out.print("<br>");
		} catch(IOException ioe) {
			System.out.println("Error in ExampleTag: " + ioe);
			return 1;
		}
		return 0;
	}
}