通过el表达式配置使jsp直接调用java静态方法

来源：互联网发布：js position absolute 编辑：程序博客网时间：2024/05/17 02:35

创建java静态方法

package demo;import java.util.Map;/** * Created by Administrator on 2016/3/6. */public class Demo {    public static String demo(){        String str = "11111111111";        return str;    }}

在WEB-INF目录下创建.tld文件，我这里是sdk.tld

<?xml version="1.0" encoding="UTF-8"?><taglib xmlns="http://java.sun.com/xml/ns/j2ee"        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee/web-jsptaglibrary_2_0.xsd"        version="2.0">    <tlib-version>1.2</tlib-version>    <short-name>sdk</short-name>    <function>        <name>demo</name>        <function-class>demo.Demo</function-class>        <function-signature>java.lang.String demo()</function-signature>    </function></taglib>

3.在web.xml中配置sdk.tld

<?xml version="1.0" encoding="UTF-8"?><web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"         xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"         version="3.1">    <jsp-config>        <taglib>            <taglib-uri>Demo</taglib-uri>            <taglib-location>/WEB-INF/sdk.tld</taglib-location>        </taglib>    </jsp-config></web-app>

4.编写jsp文件，并且引入sdk.tld

<%--  Created by IntelliJ IDEA.  User: Administrator  Date: 2016/3/6  Time: 21:11  To change this template use File | Settings | File Templates.--%><%@ page contentType="text/html;charset=UTF-8" language="java" %><%@ taglib prefix="sdk" uri="/WEB-INF/sdk.tld"%><html>  <head>    <title></title>  </head>  <body>    trewtrewtwert${sdk:demo()}  </body></html>

5.运行项目后将会看到如下结果

这里写图片描述

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