1.JSP常用标签——JSTL标签和EL表达式
https://www.cnblogs.com/Qian123/p/5308951.html
2.(JSTL)jstl.jar和standard.jar的下载地址与使用,注意不要下载1.0版,看清引入语句taglib
http://archive.apache.org/dist/jakarta/taglibs/standard/binaries/jakarta-taglibs-standard-1.1.2.zip
解压这个jakarta-taglibs-standard-1.1.2.zip里面的lib目录下就是jstl用到的jstl.jar和standard.jar
在本工程的web/WEB-INF下新建一个lib目录,将jstl.jar和standard.jar放进去,我用的是Intellij iDEA
表单提交代码:
<%--
Created by IntelliJ IDEA.
User: Admin
Date: 2019/11/12
Time: 22:54
To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>JSTL</title>
</head>
<body>
<form action="JSTLshow_EL.jsp" method="get" name="user">
<div>姓名:<input type="text" name="username"></div>
<div>密码:<input type="password" name="password"></div>
<input type="submit" value="登录">
</form>
</body>
</html>
展示提交代码:
<%--
Created by IntelliJ IDEA.
User: Admin
Date: 2019/11/12
Time: 23:05
To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@ page isELIgnored="false"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<html>
<head>
<title>Title</title>
</head>
<body>
<div>姓名:<c:out value="${param.username}"></c:out></div>
<div>密码:<c:out value="${param.password}"></c:out></div>
<%--显示0-10的平方--%>
<br/>显示0-10的平方:<br/>
<c:forEach var="x" begin="0" end="10" step="1">
<tr>
<td><c:out value="${x}"/></td>
<td><c:out value="${x*x}"/></td>
</tr>
<br>
</c:forEach>
</body>
</html>
ERROR1:
(解决)无法在web.xml或使用此应用程序部署的jar文件中解析绝对uri:[http://java.sun.com/jsp/jstl/core]
https://blog.csdn.net/weixin_42634260/article/details/89931226
参考链接:
在Intellij Idea中使用JSTL标签库