请老师帮忙看看这个错误信息
核心控制器测试是可以的,调用业务层报错
java.lang.reflect.InvocationTargetException at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at com.jjan.sm.global.DispatcherServlet.service(DispatcherServlet.java:45) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at com.jjan.sm.global.EncodingFilter.doFilter(EncodingFilter.java:21) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:199) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:493) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:137) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:81) at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:660) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343) at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:798) at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66) at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:808) at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1498) at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) at java.lang.Thread.run(Thread.java:748) Caused by: java.lang.NullPointerException at com.jjan.sm.controller.TestController.index(TestController.java:17) ... 30 more
11
收起
正在回答
2回答
同学你好,报错提示是空指针异常了,发送异常的是TestController中的第17行
空指针异常是有值为null的对象去调用方法或属性了。
同学看一下第17行具体的代码是什么?
同学是在测试包中编写了测试的代码吗?如果老师没有猜错,应该是同学注入的service层的对象是null,如果同学想要测试类,需要添加一下spring的测试包儿。并在上边引用一下配置文件。例如:
可以参考spring-aop 中老师的写法。
如果老师猜测有误,,请同学告知具体的代码。老师帮你看一下,或者同学往回推测一下,看看为什么是null。
如果我的回答解决了你的疑惑,请采纳!祝学习愉快!
4. SSM到Spring Boot入门与综合实战
- 参与学习 人
- 提交作业 323 份
- 解答问题 8263 个
本阶段将带你学习主流框架SSM,以及SpringBoot ,打通成为Java工程师的最后一公里!
了解课程
恭喜解决一个难题,获得1积分~
来为老师/同学的回答评分吧
0 星