自定义标签分三步
1.实现TagSupport
package com.it.huanyu;import java.io.IOException;import javax.servlet.jsp.JspException;import javax.servlet.jsp.JspWriter;import javax.servlet.jsp.tagext.TagSupport;public class MyTestTag extends TagSupport { private static final long serialVersionUID = 1L; @Override public int doStartTag() throws JspException { JspWriter out=super.pageContext.getOut(); try { out.print("这个是自定义标签输出的大标题 "); out.print("这个是自定义标签输出的小标题 "); out.print("这个是自定义标签输出的内容这个是自定义标签输出的内容这个是自定义标签输出的内容这个是自定义标签输出的内容 "); } catch (IOException e) { e.printStackTrace(); } return super.doStartTag(); }}
2.写tld文件
2.0
1.2
myTestTag
http://ithuanyu.cn/myTestTag/
out
com.it.huanyu.MyTestTag
JSP
create navigation for paging
3.在页面引入和输出
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%><%@ page trimDirectiveWhitespaces="true"%><%@ taglib prefix="myTestTag" uri="http://ithuanyu.cn/myTestTag/"%><% String path = request.getContextPath(); String basePath = request.getScheme() + "://" + request.getServerName() + ":" + request.getServerPort() + path + "/";%>
自定义标签的使用
4.分页标签
package com.itheima.crm.utils;import java.io.IOException;import java.io.UnsupportedEncodingException;import java.util.Map;import javax.servlet.http.HttpServletRequest;import javax.servlet.jsp.JspException;import javax.servlet.jsp.JspWriter;import javax.servlet.jsp.tagext.TagSupport;/** * 显示格式 上一页 1 2 3 4 5 下一页 */public class NavigationTag extends TagSupport { static final long serialVersionUID = 2372405317744358833L; /** * request 中用于保存Page
对象的变量名,默认为“page” */ private String bean = "page"; /** * 分页跳转的url地址,此属性必须 */ private String url = null; /** * 显示页码数量 */ private int number = 5; @Override public int doStartTag() throws JspException { JspWriter writer = pageContext.getOut(); HttpServletRequest request = (HttpServletRequest) pageContext.getRequest(); Page page = (Page) request.getAttribute(bean); if (page == null) return SKIP_BODY; url = resolveUrl(url, pageContext); try { // 计算总页数 int pageCount = page.getTotal() / page.getSize(); if (page.getTotal() % page.getSize() > 0) { pageCount++; } writer.print("
2.0
1.2
common
http://itcast.cn/common/
Common Tag
Common Tag library
page
com.itheima.crm.utils.NavigationTag
JSP
create navigation for paging
bean
true
number
true
url
true
true
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%><%@ page trimDirectiveWhitespaces="true"%><%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%><%@ taglib prefix="itcast" uri="http://itcast.cn/common/"%><% String path = request.getContextPath(); String basePath = request.getScheme() + "://" + request.getServerName() + ":" + request.getServerPort() + path + "/";%>
客户列表-BootCRM
ID
客户名称
客户来源
客户所属行业
客户级别
固定电话
手机
操作
${row.cust_id}
${row.cust_name}
${row.cust_source}
${row.cust_industry}
${row.cust_level}
${row.cust_phone}
${row.cust_mobile}
修改 删除
