javaException

最新推荐文章于 2022-12-19 11:45:58 发布

原创最新推荐文章于 2022-12-19 11:45:58 发布 · 653 阅读

0 ·

CC 4.0 BY-SA版权

Java_Exception 专栏收录该内容

12 篇文章

订阅专栏

本文探讨了Java中常见的NullPointerException异常，详细分析了一个具体的异常堆栈跟踪，指出问题源于配置文件路径未正确加载，强调了正确配置和路径检查的重要性。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

javaException

java.lang.NullPointerException
	at java.util.Properties$LineReader.readLine(Properties.java:434)
	at java.util.Properties.load0(Properties.java:353)
	at java.util.Properties.load(Properties.java:341)
	at cn.itcast.travel.util.JDBCUtils.<clinit>(JDBCUtils.java:31)
	at cn.itcast.travel.dao.impl.UserDaoImpl.<init>(UserDaoImpl.java:12)
	at cn.itcast.travel.service.impl.UserServiceImpl.<init>(UserServiceImpl.java:10)
	at cn.itcast.travel.web.servlet.RegistUserServlet.doPost(RegistUserServlet.java:32)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:647)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
	at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100)
	at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:953)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
	at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1041)
	at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:603)
	at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:312)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
三月 08, 2019 8:30:55 上午 org.apache.catalina.core.StandardWrapperValve invoke
严重: Servlet.service() for servlet [cn.itcast.travel.web.servlet.RegistUserServlet] in context with path [/travel] threw exception
java.lang.IllegalArgumentException: Property 'dataSource' is required
	at org.springframework.jdbc.support.JdbcAccessor.afterPropertiesSet(JdbcAccessor.java:135)
	at org.springframework.jdbc.core.JdbcTemplate.<init>(JdbcTemplate.java:169)
	at cn.itcast.travel.dao.impl.UserDaoImpl.<init>(UserDaoImpl.java:12)
	at cn.itcast.travel.service.impl.UserServiceImpl.<init>(UserServiceImpl.java:10)
	at cn.itcast.travel.web.servlet.RegistUserServlet.doPost(RegistUserServlet.java:32)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:647)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
	at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100)
	at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:953)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
	at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1041)
	at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:603)
	at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:312)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)

在这里插入图片描述