MySQL http://java.sun.com/jsp/jstl/core 无法在 web.xml 或使用此应用程序部署的 jar 文件中解析
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http://java.sun.com/jsp/jstl/core cannot be resolved in either web.xml or the jar files deployed with this application
提问by naddnan
I am new to jsp web development and debugging my application to be able to read off a database gives the following error:
我是 jsp web 开发的新手，调试我的应用程序以便能够读取数据库会出现以下错误：
The absolute uri: http://java.sun.com/jsp/jstl/core cannot be resolved in either web.xml or the jar files deployed with this application
I researched the internet on multiple sites regarding this issue for so long, unable to fix anything. These are my specs:
我在多个网站上研究了有关此问题的互联网很长时间，无法解决任何问题。这些是我的规格：
IDE: eclipse/ JSP version: 2.0/ Servlet version: 2.4/ JSTL version: 1.1.1/ Tomcat version: 7.0.35/
IDE：eclipse/ JSP 版本：2.0/ Servlet 版本：2.4/ JSTL 版本：1.1.1/ Tomcat 版本：7.0.35/
This is my WEB-INF/web.xml file
这是我的 WEB-INF/web.xml 文件
<?xml version="1.0" encoding="UTF-8" ?>
<web-app 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-app_2_4.xsd"
version="2.4">
<resource-ref>
<description>Resource configuration for database connection</description>
<res-ref-name>jdbc/TestDB</res-ref-name>
<res-type>javax.sql.DataSource</res-type>
<res-auth>Container</res-auth>
</resource-ref>
</web-app>
This is my META-INF/context.xml file
这是我的 META-INF/context.xml 文件
<?xml version="1.0" encoding="UTF-8" ?>
<Context>
<Resource name="jdbc/TestDB" auth="Container" type="javax.sql.DataSource"
maxActive="100" maxIdle="30" maxWait="10000"
username="admin" password="admin" driverClassName="com.mysql.jdbc.Driver"
url="jdbc:mysql://localhost:3306/checklist_pdnf"/>
</Context>
And this is my jsp file
这是我的jsp文件
<?xml version="1.0" encoding="UTF-8" ?>
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
<%@ taglib prefix="sql" uri="http://java.sun.com/jsp/jstl/sql" %>
<sql:query var="db" dataSource="jdbs/TestDB">
select * from patient
</sql:query>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
</head>
<body>
<div>
<table>
<c:forEach var="row" items="${db.rows}">
<tr>
<td>row.getString("patient_medicalRecordNumber")</td>
<td>row.getString("patient_lastName")</td>
<td>row.getString("patient_firstName")</td>
<td>row.getString("patient_middleName")</td>
<td>row.getString("patient_dateOfBirth")</td>
<td>row.getString("patient_gender")</td>
<td>row.getString("patient_admissionDateTime")</td>
<td>row.getString("patient_dischargeDateTime")</td>
<td>row.getString("patient_attendingPhysician")</td>
<td>row.getString("patient_locationRoom")</td>
</tr>
</c:forEach>
</table>
</div>
</body>
</html>
回答by naddnan
Turns out my JSP version was in fact 2.2, I remember opening up an about page in Eclipse to be able to get this information, but was not able to re find it for answering purposes. However, I will update this answer accordingly if necessary.
原来我的 JSP 版本实际上是 2.2，我记得在 Eclipse 中打开了一个关于页面以获取此信息，但无法重新找到它以进行回答。但是，如有必要，我会相应地更新此答案。
Libraries used:
使用的库：
(1) javax.servlet.jsp.jstl-1.2.1.jar
(1) javax.servlet.jsp.jstl-1.2.1.jar
(2) javax.servlet.jsp.jstl-api-1.2.1.jar
(2) javax.servlet.jsp.jstl-api-1.2.1.jar
(3) javax.servlet-api-3.0.1.jar
(3) javax.servlet-api-3.0.1.jar
(4) mysql-connector-java-5.1.23-bin.jar
(4) mysql-connector-java-5.1.23-bin.jar
pom.xml referenced from http://java.net/projects/jsp/sources/svn/content/trunk/impl/pom.xml?rev=1440
pom.xml 引用自http://java.net/projects/jsp/sources/svn/content/trunk/impl/pom.xml?rev=1440
The versions of the dependencies are:
依赖项的版本是：
a) javax.servlet-api 3.1. (b) javax.el-api 2.2.1. (c) javax.servlet.jsp-api 1.2.1 (d) javax.servlet.jsp.jstl-api 1.2.1. (e) jstl 1.2. (f) jstl-imp 1.2.
a) javax.servlet-api 3.1。(b) javax.el-api 2.2.1。(c) javax.servlet.jsp-api 1.2.1 (d) javax.servlet.jsp.jstl-api 1.2.1。(e) jstl 1.2。(f) jstl-imp 1.2。
Reference in web.xml:
web.xml 中的引用：
`<web-app
xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" version="3.0"> `
回答by stack user1
As per that link, did you follow the below instruction ?
根据该链接，您是否按照以下说明操作？
That JSP page makes use of JSTL's SQL and Core taglibs. You can get it from Apache Tomcat Taglibs - Standard Tag Library project — just make sure you get a 1.1.x or later release. Once you have JSTL, copy jstl.jar and standard.jar to your web app's WEB-INF/lib directory.
该 JSP 页面使用了 JSTL 的 SQL 和核心标签库。您可以从 Apache Tomcat Taglibs - Standard Tag Library 项目中获得它 — 只需确保您获得 1.1.x 或更高版本。拥有 JSTL 后，将 jstl.jar 和 standard.jar 复制到 Web 应用程序的 WEB-INF/lib 目录。
