java.lang.NullPointerException引起的java.lang.ExceptionInInitializerError

布满荆棘的人生 2022-05-23 11:42 136阅读 0赞

08-Jun-2018 08:58:24.928 严重 [http-nio-8080-exec-7] org.apache.catalina.core.StandardWrapperValve.invoke Servlet.service() for servlet [dispatcher] in context with path [] threw exception [Handler processing failed; nested exception is java.lang.ExceptionInInitializerError] with root cause
     java.lang.NullPointerException
    	at java.io.Reader.<init>(Reader.java:78)
    	at java.io.InputStreamReader.<init>(InputStreamReader.java:97)
    	at com.mmall.utill.PropertiesUtil.<clinit>(PropertiesUtil.java:25)
    	at com.mmall.utill.MD5Util.MD5EncodeUtf8(MD5Util.java:52)
    	at com.mmall.service.impl.UserServiceImpl.login(UserServiceImpl.java:33)
    	at com.mmall.controller.portal.UserController.login(UserController.java:36)
    	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 org.springframework.web.method.support.InvocableHandlerMethod.invoke(InvocableHandlerMethod.java:214)
    	at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:132)
    	at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:104)
    	at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandleMethod(RequestMappingHandlerAdapter.java:748)
    	at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:689)
    	at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:83)
    	at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:945)
    	at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:876)
    	at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:931)
    	at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:833)
    	at javax.servlet.http.HttpServlet.service(HttpServlet.java:648)
    	at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:807)
    	at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
    	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:230)
    	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165)
    	at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
    	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192)
    	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165)
    	at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88)
    	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:108)
    	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192)
    	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165)
    	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:198)
    	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
    	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:474)
    	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140)
    	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
    	at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:624)
    	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87)
    	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:349)
    	at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:783)
    	at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
    	at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:789)
    	at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1437)
    	at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
    	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:745)

static{
        	//String filename = "/mmall.properties";
        	String filename = "mmall.properties";
        	props = new Properties();
        	try {
    			props.load(new InputStreamReader(PropertiesUtil.class.getResourceAsStream(filename), "utf-8"));//该行报错
    		} catch (IOException e) {
    			logger.error("配置文件读取异常",e);
    		}
        }

filename使用上面的绝对地址（带斜杠的）就不报错，使用下面的相对地址就如上错误。

原因：相对地址找不到。

办法：使用斜杠开头的绝对地址