Question

我正在Eclipse中的Jetty服务器上运行war应用程序。当我尝试打开主JSP页面时，我收到以下错误消息。注意：我使用的是Java 8，在我们的战争中打包的编译器是抛出异常的：org.apache.jasper_5.5.17.v201101211617.jar。任何帮助表示赞赏谢谢。

例外：

HTTP ERROR 500

Problem accessing /help/updater/updatewar.jsp. Reason:

    Unable to compile class for JSP

An error occurred at line: 16 in the jsp file: /updater/updatewar.jsp
Generated servlet error:
The type java.lang.CharSequence cannot be resolved. It is indirectly referenced from required .class files

Caused by:

org.apache.jasper.JasperException: Unable to compile class for JSP

An error occurred at line: 16 in the jsp file: /updater/updatewar.jsp
Generated servlet error:
The type java.lang.CharSequence cannot be resolved. It is indirectly referenced from required .class files


    at org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java:84)
    at org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:328)
    at org.apache.jasper.compiler.JDTCompiler.generateClass(JDTCompiler.java:414)
    at org.apache.jasper.compiler.Compiler.compile(Compiler.java:297)
    at org.apache.jasper.compiler.Compiler.compile(Compiler.java:276)
    at org.apache.jasper.compiler.Compiler.compile(Compiler.java:264)
    at org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:563)
    at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:303)
    at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
    at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:848)
    at org.eclipse.equinox.jsp.jasper.JspServlet.service(JspServlet.java:153)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:848)
    at org.eclipse.equinox.http.registry.internal.ServletManager$ServletWrapper.service(ServletManager.java:180)
    at org.eclipse.equinox.http.servlet.internal.ServletRegistration.service(ServletRegistration.java:61)
    at org.eclipse.equinox.http.servlet.internal.ProxyServlet.processAlias(ProxyServlet.java:126)
    at org.eclipse.equinox.http.servlet.internal.ProxyServlet.service(ProxyServlet.java:68)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:848)
    at org.eclipse.equinox.servletbridge.BridgeServlet.service(BridgeServlet.java:120)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:848)
    at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:598)
    at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1367)
    at com.ibm.ccl.ut.war.filter.WelcomeFileFilter.doFilter(WelcomeFileFilter.java:51)
    at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1338)
    at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:484)
    at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:119)
    at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:524)
    at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:233)
    at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1065)
    at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:413)
    at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:192)
    at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:999)
    at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:117)
    at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:111)
    at org.eclipse.jetty.server.Server.handle(Server.java:350)
    at org.eclipse.jetty.server.AbstractHttpConnection.handleRequest(AbstractHttpConnection.java:454)
    at org.eclipse.jetty.server.AbstractHttpConnection.headerComplete(AbstractHttpConnection.java:890)
    at org.eclipse.jetty.server.AbstractHttpConnection$RequestHandler.headerComplete(AbstractHttpConnection.java:944)
    at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:630)
    at org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:230)
    at org.eclipse.jetty.server.AsyncHttpConnection.handle(AsyncHttpConnection.java:77)
    at org.eclipse.jetty.io.nio.SelectChannelEndPoint.handle(SelectChannelEndPoint.java:606)
    at org.eclipse.jetty.io.nio.SelectChannelEndPoint$1.run(SelectChannelEndPoint.java:46)
    at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:603)
    at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:538)
    at java.lang.Thread.run(Thread.java:785)

Answer 1

Jetty 7（及更低版本）可能不支持Java 8.在Java 8中，对类进行了一些更改，导致JSP编译失败。

相关问题（同一例外）：Unable to compile class for JSP: The type java.util.Map$Entry cannot be resolved. It is indirectly referenced from required .class files

ManifoldCF中的相关问题（相同的例外）：https://issues.apache.org/jira/browse/CONNECTORS-938

至少Jetty 9.2支持Java 8：https://webtide.com/jetty-9-2-0-released/ http://www.eclipse.org/jetty/documentation/current/what-jetty-version.html

Answer 2

在jrxml中添加just language =“groovy”对我有用。

<jasperReport 
    xmlns="http://jasperreports.sourceforge.net/jasperreports" 
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
    xsi:schemaLocation="http://jasperreports.sourceforge.net/jasperreports http://jasperreports.sourceforge.net/xsd/jasperreport.xsd" 
    name="jasper_report_template" **language="groovy"** 
    pageWidth="100" pageHeight="100" columnWidth="10" 
    leftMargin="20" rightMargin="20" topMargin="20" bottomMargin="20" 
>

Answer 3

正如所有人所说只是升级码头服务器

如果您正在使用maven

转到jetty插件并将其更新为

<plugin>
    <groupId>org.eclipse.jetty</groupId>
    <artifactId>jetty-maven-plugin</artifactId>
    <version>9.3.0.v20150612</version>
    <configuration>
        <scanIntervalSeconds>3</scanIntervalSeconds>
        <httpConnector>
            <port>${jetty.port}</port>
            <idleTimeout>60000</idleTimeout>
        </httpConnector>
        <stopKey>foo</stopKey>
        <stopPort>${jetty.stop.port}</stopPort>
    </configuration>
</plugin>

接收类型java.lang.CharSequence无法解析。 Java 8 JDK的错误消息

3 个答案: