> 2022年11月17日 17:52，Mark Thomas <ma...@apache.org> 写道：
>
> On 17/11/2022 08:23, Han Li wrote:
>>> 2022年11月17日 16:08，Mark Thomas <ma...@apache.org> 写道：
>>>
>>> On 17/11/2022 04:04, Han Li wrote:
>>>> I think that I encounter a problem, shown below:
>>>> org.apache.jasper.JasperException: Unable to compile class for JSP:
>>>> An error occurred at line: [17] in the jsp file: [/jsp/include/foo.jsp]
>>>> System cannot be resolved
>>>> 14: See the License for the specific language governing permissions and
>>>> 15: limitations under the License.
>>>> 16:
>>>> 17: --%><%= System.currentTimeMillis() %>
>>>> Stacktrace:
>>>>
>>>> org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java:102)
>>>>
>>>> org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:213)
>>>>
>>>> org.apache.jasper.compiler.JDTCompiler.generateClass(JDTCompiler.java:589)
>>>> org.apache.jasper.compiler.Compiler.compile(Compiler.java:380)
>>>> org.apache.jasper.compiler.Compiler.compile(Compiler.java:350)
>>>> org.apache.jasper.compiler.Compiler.compile(Compiler.java:334)
>>>>
>>>> org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:597)
>>>>
>>>> org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:398)
>>>> org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:383)
>>>> org.apache.jasper.servlet.JspServlet.service(JspServlet.java:331)
>>>> javax.servlet.http.HttpServlet.service(HttpServlet.java:765)
>>>> org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
>>>>
>>>> org.apache.catalina.filters.HttpHeaderSecurityFilter.doFilter(HttpHeaderSecurityFilter.java:126)
>>>>
>>>> org.apache.catalina.filters.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:109)
>>>> Ant test show passes, but there are problems. (I downloaded 8.5.83 from
>>>> the official website, then accessed example webapp
>>>> and also have this problem). I don’t know JDT, but I tested again by
>>>> upgrading ecj version to 4.25 and this
>>>> problem was solved.
>>>
>>> I can't repeat this.
>>>
>>> I downloaded the 8.5.84 RC and then tested with Oracle JDK 1.7.0_80. The
>>> JSP include example worked.
>>>
>>> I then cleared out the work directory, switched to Temurin JDK 11.0.17_08
>>> and tested the JSP include example. That worked too.
>>>
>>> I made no changes to the Eclipse compiler JAR.
>>>
>>> Can you provide the exact steps to recreate the issue from a clean 8.5.84
>>> download?
>> There are no exact steps, just need to simply access this url:
>> http://localhost:8080/examples/jsp/include/foo.jsp
>
> The Java version was the key.
>
> Eclispe JDT 4.6.3 can't compile JSPs under Java 17 as it can't read the Java
> 17 class files.
>
> We can't update JDT as that is the latest version that works with Java 7 and
> Tomcat 8.x has a (specification mandated) minimum Java version of 7.
>
> Updating the JDT locally, as you found, is the way to work around this
> problem.
Got it.
In that case, I think we need to mark the upper limit of JDK version on
documentation for 8.5.x.
Han
>
> Mark
>
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