jsp - jSTL not working with error(The absolute uri : [http://java. sun.com/jsp/jSTL/core] cannot be resolved)

Question

为了尝试使用 jSTL，我用 maven 安装了 jSTL 1.2 库。但是，当我通过此消息运行 jsp 页面时，“绝对 uri: [ http://java.sun.com/jsp/jstl/core] 无法在 web.xml 或随此应用程序部署的 jar 文件中解析”

我读过 this stackoverflow page ，完成了我被告知的事情，但这并没有解决我的问题。

我正在使用 jdk 1.8 和 tomcat 8.5 我将附上完整的错误报告和部分代码。

    HTTP Status 500 – Internal Server Error

Type Exception Report

Message 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

Description The server encountered an unexpected condition that prevented it from fulfilling the request.

Exception

org.apache.jasper.JasperException: 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
    org.apache.jasper.compiler.DefaultErrorHandler.jspError(DefaultErrorHandler.java:55)
    org.apache.jasper.compiler.ErrorDispatcher.dispatch(ErrorDispatcher.java:293)
    org.apache.jasper.compiler.ErrorDispatcher.jspError(ErrorDispatcher.java:80)
    org.apache.jasper.compiler.TagLibraryInfoImpl.generateTldResourcePath(TagLibraryInfoImpl.java:251)
    org.apache.jasper.compiler.TagLibraryInfoImpl.<init>(TagLibraryInfoImpl.java:122)
    org.apache.jasper.compiler.Parser.parseTaglibDirective(Parser.java:434)
    org.apache.jasper.compiler.Parser.parseDirective(Parser.java:492)
    org.apache.jasper.compiler.Parser.parseElements(Parser.java:1448)
    org.apache.jasper.compiler.Parser.parse(Parser.java:145)
    org.apache.jasper.compiler.ParserController.doParse(ParserController.java:244)
    org.apache.jasper.compiler.ParserController.parse(ParserController.java:105)
    org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:203)
    org.apache.jasper.compiler.Compiler.compile(Compiler.java:374)
    org.apache.jasper.compiler.Compiler.compile(Compiler.java:351)
    org.apache.jasper.compiler.Compiler.compile(Compiler.java:335)
    org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:601)
    org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:368)
    org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:385)
    org.apache.jasper.servlet.JspServlet.service(JspServlet.java:329)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:742)
    org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
Note The full stack trace of the root cause is available in the server logs.

Apache Tomcat/8.5.16

这是我的 pom.xml 文件

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>ch06</groupId>
    <artifactId>ch06</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <build>
        <sourceDirectory>src</sourceDirectory>
        <plugins>
            <plugin>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.6.1</version>
                <configuration>
                    <source>1.8</source>
                    <target>1.8</target>
                </configuration>
            </plugin>
        </plugins>
    </build>
    <dependencies>
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>jstl</artifactId>
            <version>1.2</version>
        </dependency>
  </dependencies>
</project>

这是我的 web.xml 文件的一部分，非常简洁。

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="3.0" 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">
</web-app>

这是我的 jsp 代码，其中包含 jSTL 核心库。

<%@page contentType="text/html" pageEncoding="utf-8"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<c:import url="/includes/header.html" />

Answer 1

它在我将 maven 存储库文件夹中的 jSTL-1.2.jar 复制到 web-inf/lib 文件夹后工作。