学步园

原文：jsp自定义标签tagEL函数

源代码下载地址：http://www.zuidaima.com/share/1550463459052544.htm

简单易懂的自定义EL函数

tag.java

</pre><p> </p><pre name="code" class="java">package com.zuidaima.tag;

import java.io.IOException;

import javax.servlet.jsp.JspException;
import javax.servlet.jsp.JspWriter;
import javax.servlet.jsp.PageContext;
import javax.servlet.jsp.tagext.SimpleTagSupport;
/**
*@author www.zuidaima.com
**/

public class MsgTag extends SimpleTagSupport{
	private String info;
	private int qty;
	public MsgTag(){
		System.out.println("MsgTag's constructor...");
	}
	public void setInfo(String info) {
		System.out.println("setInfo..." + info);
		this.info = info;
	}

	public void setQty(int qty) {
		System.out.println("setQty..." + qty);
		this.qty = qty;
	}

	@Override
	public void doTag() throws JspException, IOException {
		System.out.println("doTag...");
		//通过SimpleTagSupport提供的getJspContext方法
		//获得PageContext。PageContext提供了获得其它
		//几个隐含对象的方法。
		PageContext ctx = (PageContext)getJspContext();
		JspWriter out = ctx.getOut();
		for(int i=0;i < qty;i++){
			out.println(info + "<br/>");
		}
	}
	
}