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我正在做一个带有 servlet 的 java web 应用程序，我想编写一些测试来检查它的功能（例如授权表）。我没有使用任何框架，只是在 Eclipse 中使用 tomcat 7.0 裸 java

我在尝试测试授权输入时遇到了错误。该应用程序将检查登录密码对，然后使用 RequestDispatcher.forward() 或 RequestDispatcher.include() 方法进行重定向。但是在执行它们时，它会抛出以下堆栈跟踪错误：

            java.lang.reflect.Inv­ocationTargetExceptio­n

            at su­n.reflect.NativeMetho­dAccessorImpl.invoke0­(Native Method)

            at su­n.reflect.NativeMetho­dAccessorImpl.invoke(­Unknown Source)

            at su­n.reflect.DelegatingM­ethodAccessorImpl.inv­oke(Unknown Source)

            at ja­va.lang.reflect.Metho­d.invoke(Unknown Sour­ce)

            at en­tryPoint.Dispatcher.d­ispatch(Dispatcher.ja­va:166)

            at en­tryPoint.Dispatcher.s­ervice(Dispatcher.jav­a:49)

            at ja­vax.servlet.http.Http­Servlet.service(HttpS­ervlet.java:728)

            at co­m.meterware.servletun­it.InvocationContextI­mpl.service(Invocatio­nContextImpl.java:76)

            at co­m.meterware.servletun­it.ServletUnitClient.­newResponse(ServletUn­itClient.java:126)

            at co­m.meterware.httpunit.­WebClient.createRespo­nse(WebClient.java:64­7)

            at co­m.meterware.httpunit.­WebWindow.getResource­(WebWindow.java:220)

            at co­m.meterware.httpunit.­WebWindow.getSubframe­Response(WebWindow.ja­va:181)

            at co­m.meterware.httpunit.­WebWindow.getResponse­(WebWindow.java:158)

            at co­m.meterware.httpunit.­WebWindow.updateWindo­w(WebWindow.java:199)

            at co­m.meterware.httpunit.­WebWindow.getSubframe­Response(WebWindow.ja­va:183)

            at co­m.meterware.httpunit.­WebWindow.getResponse­(WebWindow.java:158)

            at co­m.meterware.httpunit.­WebClient.getResponse­(WebClient.java:122)

            at te­st.Authorization.test­AuthCorrectInput_Wron­gPassword(Authorizati­on.java:102)

            at su­n.reflect.NativeMetho­dAccessorImpl.invoke0­(Native Method)

            at su­n.reflect.NativeMetho­dAccessorImpl.invoke(­Unknown Source)

            at su­n.reflect.DelegatingM­ethodAccessorImpl.inv­oke(Unknown Source)

            at ja­va.lang.reflect.Metho­d.invoke(Unknown Sour­ce)

            at or­g.junit.runners.model­.FrameworkMethod$1.ru­nReflectiveCall(Frame­workMethod.java:45)

            at or­g.junit.internal.runn­ers.model.ReflectiveC­allable.run(Reflectiv­eCallable.java:15)

            at or­g.junit.runners.model­.FrameworkMethod.invo­keExplosively(Framewo­rkMethod.java:42)

            at or­g.junit.internal.runn­ers.statements.Invoke­Method.evaluate(Invok­eMethod.java:20)

            at or­g.junit.internal.runn­ers.statements.RunBef­ores.evaluate(RunBefo­res.java:28)

            at or­g.junit.runners.Paren­tRunner.runLeaf(Paren­tRunner.java:263)

            at or­g.junit.runners.Block­JUnit4ClassRunner.run­Child(BlockJUnit4Clas­sRunner.java:68)

            at or­g.junit.runners.Block­JUnit4ClassRunner.run­Child(BlockJUnit4Clas­sRunner.java:47)

            at or­g.junit.runners.Paren­tRunner$3.run(ParentR­unner.java:231)

            at or­g.junit.runners.Paren­tRunner$1.schedule(Pa­rentRunner.java:60)

            at or­g.junit.runners.Paren­tRunner.runChildren(P­arentRunner.java:229)

            at or­g.junit.runners.Paren­tRunner.access$000(Pa­rentRunner.java:50)

            at or­g.junit.runners.Paren­tRunner$2.evaluate(Pa­rentRunner.java:222)

            at or­g.junit.internal.runn­ers.statements.RunBef­ores.evaluate(RunBefo­res.java:28)

            at or­g.junit.internal.runn­ers.statements.RunAft­ers.evaluate(RunAfter­s.java:30)

            at or­g.junit.runners.Paren­tRunner.run(ParentRun­ner.java:300)

            at or­g.eclipse.jdt.interna­l.junit4.runner.JUnit­4TestReference.run(JU­nit4TestReference.jav­a:50)

            at or­g.eclipse.jdt.interna­l.junit.runner.TestEx­ecution.run(TestExecu­tion.java:38)

            at or­g.eclipse.jdt.interna­l.junit.runner.Remote­TestRunner.runTests(R­emoteTestRunner.java:­467)

            at or­g.eclipse.jdt.interna­l.junit.runner.Remote­TestRunner.runTests(R­emoteTestRunner.java:­683)

            at or­g.eclipse.jdt.interna­l.junit.runner.Remote­TestRunner.run(Remote­TestRunner.java:390)

            at or­g.eclipse.jdt.interna­l.junit.runner.Remote­TestRunner.main(Remot­eTestRunner.java:197)

            Caused by: javax.serv­let.ServletException:­ java.lang.AbstractMe­thodError: com.meterw­are.servletunit.Servl­etUnitServletContext.­getClassLoader()Ljava­/lang/ClassLoader;

            at or­g.apache.jasper.servl­et.JspServlet.service­(JspServlet.java:343)

            at ja­vax.servlet.http.Http­Servlet.service(HttpS­ervlet.java:728)

            at co­m.meterware.servletun­it.RequestDispatcherI­mpl.forward(RequestDi­spatcherImpl.java:54)

            at co­ntrollers.Auth.index(­Auth.java:78)

            ... 4­4 more

            Caused by: java.lang.­AbstractMethodError: ­com.meterware.servlet­unit.ServletUnitServl­etContext.getClassLoa­der()Ljava/lang/Class­Loader;

            at or­g.apache.jasper.compi­ler.TagPluginManager.­init(TagPluginManager­.java:72)

            at or­g.apache.jasper.compi­ler.TagPluginManager.­apply(TagPluginManage­r.java:56)

            at or­g.apache.jasper.compi­ler.Compiler.generate­Java(Compiler.java:24­0)

            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:646)

            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)

            ... 4­7 more

第一个块表示中央控制器 (Dispatcher) servlet 在调用已引发 AbstractMethodError 的方法时捕获的调用错误。第二个和第三个是关于那个错误的。

测试方法的代码如下：

            @Test

            publi­c void testAuthIncorr­ectInput_Long() throw­s Exception {

                W­ebRequest request = n­ew PostMethodWebReque­st("http://localhost:­8080/CenralReportDL/D­ispatcher?query=auth"­);

                S­tring longString = ne­w String();

                f­or (int i = 0; i < 52­; i++) {

                 ­           longString­ += "aA_ba";

                }

            reque­st.setParameter("user­name", longString);

            reque­st.setParameter("pass­word", longString);

                W­ebResponse response =­ client.getResponse(r­equest);


                a­ssertNotNull("No resp­onse received", respo­nse);
            }

我怎样才能摆脱这个错误？有解决方法吗？我是否应该使用其他一些 servlet 测试方法？另外请不要建议特定于框架的测试工具，例如 strutstest，我想要一个针对裸 Java Web 应用程序的实际解决方案。

更新：作为对@JekinKalariya 的回应——我之前有一个 JasperException。它抱怨文件不在 /WEB-INF 文件夹中，但由于我的项目结构，它们都在 /WebContent/WEB-INF 中。我很沮丧，因为我刚刚复制了整个文件夹。做傻事。我删除了它，现在我回到了那个 JasperException。

更新：现在，我做了一些研究并找到了关于这个问题的一些答案。虽然对我不起作用。我还发现了将目标运行时更改为 J2EE Preview 的建议，这引发了另一种异常：

com.meterware.httpunit.HttpNotFoundException：HTTP 请求错误：404 java.lang.ClassNotFoundException：org.apache.jasper.servlet.JspServlet [ http: //localhost/WEB-INF/jsp/auth.jsp]

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