Spring Boot 中的 JSTL 支持

Question

虽然我知道有 some limitations in the JSP support，但我想在 Spring 启动 Web 应用程序中使用 JSP 和 JSTL 标签。

我的 JSP 文件的摘录：

<%@ page pageEncoding="UTF-8"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ taglib prefix="fn" uri="http://java.sun.com/jsp/jstl/functions"%>

...

<c:catch var="ex">
    <c:if test="${!fn:contains(param.template,'../') && !fn:startsWith(param.template,'/')}">
        <c:import url=    ...

因此，我将以下依赖项添加到 pom.xml：

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-tomcat</artifactId>
</dependency>

<dependency>
    <groupId>org.apache.tomcat.embed</groupId>
    <artifactId>tomcat-embed-jasper</artifactId>
      <scope>provided</scope>
</dependency>

<dependency>
    <groupId>javax.servlet</groupId>
    <artifactId>jstl</artifactId>
</dependency>

但是，如果访问jsp，则抛出异常：

2017-08-14 13:09:32.259 ERROR 2376 --- [nio-8080-exec-2] o.a.c.c.C.[.[localhost].[/].[jsp]        : Servlet.service() for servlet [jsp] in context with path [] threw exception [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] with root cause

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
        at org.apache.jasper.compiler.DefaultErrorHandler.jspError(DefaultErrorHandler.java:55) ~[tomcat-embed-jasper-8.5.16.jar:8.5.16]
        at org.apache.jasper.compiler.ErrorDispatcher.dispatch(ErrorDispatcher.java:293) ~[tomcat-embed-jasper-8.5.16.jar:8.5.16]
        at org.apache.jasper.compiler.ErrorDispatcher.jspError(ErrorDispatcher.java:80) ~[tomcat-embed-jasper-8.5.16.jar:8.5.16]
        at org.apache.jasper.compiler.TagLibraryInfoImpl.generateTldResourcePath(TagLibraryInfoImpl.java:251) ~[tomcat-embed-jasper-8.5.16.jar:8.5.16]
        at org.apache.jasper.compiler.TagLibraryInfoImpl.<init>(TagLibraryInfoImpl.java:122) ~[tomcat-embed-jasper-8.5.16.jar:8.5.16]
        at org.apache.jasper.compiler.Parser.parseTaglibDirective(Parser.java:434) ~[tomcat-embed-jasper-8.5.16.jar:8.5.16]
        at org.apache.jasper.compiler.Parser.parseDirective(Parser.java:492) ~[tomcat-embed-jasper-8.5.16.jar:8.5.16]
        at org.apache.jasper.compiler.Parser.parseElements(Parser.java:1448) ~[tomcat-embed-jasper-8.5.16.jar:8.5.16]
        at org.apache.jasper.compiler.Parser.parse(Parser.java:145) ~[tomcat-embed-jasper-8.5.16.jar:8.5.16]
        at org.apache.jasper.compiler.ParserController.doParse(ParserController.java:244) ~[tomcat-embed-jasper-8.5.16.jar:8.5.16]
        at org.apache.jasper.compiler.ParserController.parse(ParserController.java:105) ~[tomcat-embed-jasper-8.5.16.jar:8.5.16]
        at org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:203) ~[tomcat-embed-jasper-8.5.16.jar:8.5.16]
        at org.apache.jasper.compiler.Compiler.compile(Compiler.java:374) ~[tomcat-embed-jasper-8.5.16.jar:8.5.16]
        at org.apache.jasper.compiler.Compiler.compile(Compiler.java:351) ~[tomcat-embed-jasper-8.5.16.jar:8.5.16]
        at org.apache.jasper.compiler.Compiler.compile(Compiler.java:335) ~[tomcat-embed-jasper-8.5.16.jar:8.5.16]
        at org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:601) ~[tomcat-embed-jasper-8.5.16.jar:8.5.16]
        at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:368) ~[tomcat-embed-jasper-8.5.16.jar:8.5.16]
        at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:385) ~[tomcat-embed-jasper-8.5.16.jar:8.5.16]
        at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:329) ~[tomcat-embed-jasper-8.5.16.jar:8.5.16]
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:742) ~[tomcat-embed-core-8.5.16.jar:8.5.16]
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231) ~[tomcat-embed-core-8.5.16.jar:8.5.16]
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-8.5.16.jar:8.5.16]
        at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) ~[tomcat-embed-websocket-8.5.16.jar:8.5.16]
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-8.5.16.jar:8.5.16]
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-8.5.16.jar:8.5.16]
        at org.t246osslab.easybuggy4sb.core.filters.SecurityFilter.doFilter(SecurityFilter.java:69) ~[classes/:na]
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-8.5.16.jar:8.5.16]
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-8.5.16.jar:8.5.16]
        at org.t246osslab.easybuggy4sb.core.filters.AuthenticationFilter.doFilter(AuthenticationFilter.java:75) ~[classes/:na]
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-8.5.16.jar:8.5.16]
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-8.5.16.jar:8.5.16]
        at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99) ~[spring-web-4.3.10.RELEASE.jar:4.3.10.RELEASE]
        at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-4.3.10.RELEASE.jar:4.3.10.RELEASE]
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-8.5.16.jar:8.5.16]
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-8.5.16.jar:8.5.16]
        at org.springframework.web.filter.HttpPutFormContentFilter.doFilterInternal(HttpPutFormContentFilter.java:105) ~[spring-web-4.3.10.RELEASE.jar:4.3.10.RELEASE]
        at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-4.3.10.RELEASE.jar:4.3.10.RELEASE]
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-8.5.16.jar:8.5.16]
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-8.5.16.jar:8.5.16]
        at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:81) ~[spring-web-4.3.10.RELEASE.jar:4.3.10.RELEASE]
        at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-4.3.10.RELEASE.jar:4.3.10.RELEASE]
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-8.5.16.jar:8.5.16]
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-8.5.16.jar:8.5.16]
        at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:197) ~[spring-web-4.3.10.RELEASE.jar:4.3.10.RELEASE]
        at org.t246osslab.easybuggy4sb.core.filters.EncodingFilter.doFilterInternal(EncodingFilter.java:33) ~[classes/:na]
        at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-4.3.10.RELEASE.jar:4.3.10.RELEASE]
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-8.5.16.jar:8.5.16]
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-8.5.16.jar:8.5.16]
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:198) ~[tomcat-embed-core-8.5.16.jar:8.5.16]
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96) [tomcat-embed-core-8.5.16.jar:8.5.16]
        at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:478) [tomcat-embed-core-8.5.16.jar:8.5.16]
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140) [tomcat-embed-core-8.5.16.jar:8.5.16]
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:80) [tomcat-embed-core-8.5.16.jar:8.5.16]
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87) [tomcat-embed-core-8.5.16.jar:8.5.16]
        at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:624) [tomcat-embed-core-8.5.16.jar:8.5.16]
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:342) [tomcat-embed-core-8.5.16.jar:8.5.16]
        at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:799) [tomcat-embed-core-8.5.16.jar:8.5.16]
        at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66) [tomcat-embed-core-8.5.16.jar:8.5.16]
        at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:868) [tomcat-embed-core-8.5.16.jar:8.5.16]
        at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1455) [tomcat-embed-core-8.5.16.jar:8.5.16]
        at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) [tomcat-embed-core-8.5.16.jar:8.5.16]
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [na:1.8.0_121]
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [na:1.8.0_121]
        at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat-embed-core-8.5.16.jar:8.5.16]
        at java.lang.Thread.run(Thread.java:745) [na:1.8.0_121]

有人知道解决方案或解决方法吗？

环境：

Spring 引导 1.5.6.RELEASE

我不需要使用 Thymeleaf 的替代解决方案。

编辑：

重现步骤：

git clone https://github.com/k-tamura/easybuggy4sb.git
cd easybuggy4sb

添加以下依赖到pom.xml.

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-tomcat</artifactId>
</dependency>

<dependency>
    <groupId>org.apache.tomcat.embed</groupId>
    <artifactId>tomcat-embed-jasper</artifactId>
      <scope>provided</scope>
</dependency>

<dependency>
    <groupId>javax.servlet</groupId>
    <artifactId>jstl</artifactId>
</dependency>

在src/main/resources/application.properties中添加如下属性（为了避免启动时出现异常）：
```
server.tomcat.additional-tld-skip-patterns=*.jar
```

将test.jsp文件添加到src/main/webapp:

<%@ page pageEncoding="UTF-8"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>

mvn spring-boot:run

访问http://localhost:8080/test.jsp -> 出现以下异常：

There was an unexpected error (type=Internal Server Error, status=500).
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

Answer 1

您需要对 1.2 版本使用 jstl 依赖项。您还需要将 spring-boot-starter-parent 添加到您的 pom.xml 中。您可以在下面找到相关性。

<dependency>
    <groupId>javax.servlet</groupId>
    <artifactId>servlet-api</artifactId>
    <version>2.5</version>
    <scope>provided</scope>
</dependency>
<dependency>
    <groupId>javax.servlet</groupId>
    <artifactId>jstl</artifactId>
    <version>1.2</version>
</dependency>

<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>1.4.0.RELEASE</version>
</parent>

Answer 2

此问题是由 server.tomcat.additional-tld-skip-patterns=*.jar 引起的。我会关闭这个问题。

Spring Boot 中的 JSTL 支持

JSTL support in Spring Boot

spring

jsp

jstl

maven

spring-boot