java.lang.ClassNotFoundException:javax.servlet.jsp.jstl.sql.SQLExecutionTag

问题描述 投票:0回答:3

这可能是一个菜鸟问题,但我陷入了这个错误。我使用的是 Tomcat 7.0.34

WebContent/WEB-INF/lib
       jstl-1.2-sources.jar
       jstl-1-2.jar
       mysql-connector-java-5.1.31

下面是我的jsp代码。

<sql:setDataSource var="con" driver="com.mysql.jdbc.Driver" url="jdbc:mysql://localhost/test" user="root" password=""/>
    <sql:query var="result" sql="select * from account" dataSource="${con }"/>
    <c:forEach var="rows" items="${result.rows }">
        ${rows.email}
    </c:forEach>

完整堆栈跟踪:

SEVERE: Servlet.service() for servlet [jsp] in context with path [/JavaPMS] threw exception [java.lang.NoClassDefFoundError: javax/servlet/jsp/jstl/sql/SQLExecutionTag] with root cause
java.lang.ClassNotFoundException: javax.servlet.jsp.jstl.sql.SQLExecutionTag
    at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1720)
    at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1571)
    at java.lang.ClassLoader.defineClass1(Native Method)
    at java.lang.ClassLoader.defineClass(ClassLoader.java:760)
    at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
    at org.apache.catalina.loader.WebappClassLoader.findClassInternal(WebappClassLoader.java:2957)
    at org.apache.catalina.loader.WebappClassLoader.findClass(WebappClassLoader.java:1210)
    at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1690)
    at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1571)
    at java.lang.ClassLoader.defineClass1(Native Method)
    at java.lang.ClassLoader.defineClass(ClassLoader.java:760)
    at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
    at org.apache.catalina.loader.WebappClassLoader.findClassInternal(WebappClassLoader.java:2957)
    at org.apache.catalina.loader.WebappClassLoader.findClass(WebappClassLoader.java:1210)
    at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1690)
    at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1571)
    at org.apache.jasper.compiler.Parser.parseCustomTag(Parser.java:1223)
    at org.apache.jasper.compiler.Parser.parseElements(Parser.java:1452)
    at org.apache.jasper.compiler.Parser.parse(Parser.java:138)
    at org.apache.jasper.compiler.ParserController.doParse(ParserController.java:242)
    at org.apache.jasper.compiler.ParserController.parse(ParserController.java:102)
    at org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:198)
    at org.apache.jasper.compiler.Compiler.compile(Compiler.java:373)
    at org.apache.jasper.compiler.Compiler.compile(Compiler.java:353)
    at org.apache.jasper.compiler.Compiler.compile(Compiler.java:340)
    at org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:657)
    at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:357)
    at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)
    at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
    at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:501)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
    at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:950)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
    at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1040)
    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:607)
    at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:314)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
    at java.lang.Thread.run(Thread.java:744)

如果我删除

<sql:query/>
,它似乎工作正常。

谢谢你。

java sql jsp jstl
3个回答
2
投票

请下载这两个 jar 并尝试一下,希望应该可以工作。

将它们放在以下位置

WebContent/WEB-INF/lib


0
投票

您已经指定了查询属性,但它应该如下所示,

<sql:setDataSource var="con" driver="com.mysql.jdbc.Driver" url="jdbc:mysql://localhost/test" user="root" password=""/>
    <sql:query var="result" dataSource="${con }">
select * from account
</sql:query>
    <c:forEach var="rows" items="${result.rows }">
        ${rows.email}
    </c:forEach>

它应该按预期工作


0
投票

我也遇到了同样的错误,每次运行应用程序时,我厌倦了用多个版本更改 mysql 连接器依赖项,但错误仍然是他们的,我多次阅读我的代码,但没有发现任何东西也尝试过 cj 和驱动程序中没有 cj即使这样它也不起作用,但后来我重新加载我的 Intellij IDEA Ultimate 版本(IDE)并猜测它正在工作:-<>

© www.soinside.com 2019 - 2024. All rights reserved.