spring - 无法为连接 URL '' java.lang.NullPointerException 创建类 'null' 的 JDBC 驱动程序

Question

服务器加载正常(没有错误或警告)但是，某些图像无法正确显示。我不得不摆弄类路径以使服务器运行，所以我想知道它是否与此有关？不管怎样，这是我的日志，真的很想得到一些帮助。我只在几页之间切换时收到错误...

    29-Aug-2011 15:46:36 org.apache.catalina.core.AprLifecycleListener init
INFO: The APR based Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path: C:\Program Files\Java\jdk1.6.0_24\bin;.;C:\WINDOWS\Sun\Java\bin;C:\WINDOWS\system32;C:\WINDOWS;C:\Program Files\CollabNet\Subversion Client;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;C:\Program Files\Symantec\pcAnywhere\;C:\Program Files\Open Text\Livelink Explorer\;C:\Program Files\TortoiseSVN\bin;C:\Program Files\CollabNet\Subversion Client;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;C:\Program Files\Symantec\pcAnywhere\;C:\Program Files\Open Text\Livelink Explorer\;C:\Program Files\TortoiseSVN\bin;C:\tools\apache-ant-1.8.2\bin;C:\tools\apache-maven-2.2.1\bin
29-Aug-2011 15:46:36 org.apache.coyote.http11.Http11Protocol init
INFO: Initializing Coyote HTTP/1.1 on http-8080
29-Aug-2011 15:46:36 org.apache.catalina.startup.Catalina load
INFO: Initialization processed in 451 ms
29-Aug-2011 15:46:36 org.apache.catalina.core.StandardService start
INFO: Starting service Catalina
29-Aug-2011 15:46:36 org.apache.catalina.core.StandardEngine start
INFO: Starting Servlet Engine: Apache Tomcat/6.0.20
29-Aug-2011 15:46:37 org.apache.catalina.core.ApplicationContext log
INFO: Initializing Spring root WebApplicationContext
java.io.IOException: Stream closed
Continuing ...
29-Aug-2011 15:46:38 org.apache.catalina.core.ApplicationContext log
INFO: Initializing Spring root WebApplicationContext
29-Aug-2011 15:46:39 org.apache.coyote.http11.Http11Protocol start
INFO: Starting Coyote HTTP/1.1 on http-8080
29-Aug-2011 15:46:39 org.apache.jk.common.ChannelSocket init
INFO: JK: ajp13 listening on /0.0.0.0:8009
29-Aug-2011 15:46:39 org.apache.jk.server.JkMain start
INFO: Jk running ID=0 time=0/47  config=null
29-Aug-2011 15:46:39 org.apache.catalina.startup.Catalina start
INFO: Server startup in 2868 ms
29-Aug-2011 15:47:22 org.apache.catalina.core.ApplicationContext log
INFO: Initializing Spring FrameworkServlet 'main'
Cannot create JDBC driver of class '' for connect URL 'null'
java.lang.NullPointerException
    at sun.jdbc.odbc.JdbcOdbcDriver.getProtocol(JdbcOdbcDriver.java:507)
    at sun.jdbc.odbc.JdbcOdbcDriver.knownURL(JdbcOdbcDriver.java:476)
    at sun.jdbc.odbc.JdbcOdbcDriver.acceptsURL(JdbcOdbcDriver.java:307)
    at java.sql.DriverManager.getDriver(DriverManager.java:253)
    at org.apache.tomcat.dbcp.dbcp.BasicDataSource.createDataSource(BasicDataSource.java:1143)
    at org.apache.tomcat.dbcp.dbcp.BasicDataSource.getConnection(BasicDataSource.java:880)
    at org.springframework.jdbc.datasource.DataSourceUtils.doGetConnection(DataSourceUtils.java:113)
    at org.springframework.jdbc.datasource.DataSourceUtils.getConnection(DataSourceUtils.java:79)
    at org.springframework.jdbc.core.JdbcTemplate.execute(JdbcTemplate.java:328)
    at org.springframework.jdbc.core.JdbcTemplate.query(JdbcTemplate.java:404)
    at org.springframework.jdbc.core.JdbcTemplate.query(JdbcTemplate.java:412)
    at org.springframework.jdbc.core.simple.SimpleJdbcTemplate.query(SimpleJdbcTemplate.java:109)
    at com.xxxxx.yyyyy.zzzzz.dao.AirQualityJdbcDao.getAirQualityDistricts(AirQualityJdbcDao.java:26)
    at com.xxxxx.yyyyy.zzzzz.services.AirQualityServiceImpl.getAirQualityDistricts(AirQualityServiceImpl.java:116)
    at com.xxxxx.yyyyy.zzzzz.services.AirQualityServiceImpl.getCurrentHighMediumAirQualityDistricts(AirQualityServiceImpl.java:37)
    at com.xxxxx.yyyyy.zzzzz.services.NewsServiceImpl.getAirQualityAlertsInNews(NewsServiceImpl.java:166)
    at com.xxxxx.yyyyy.zzzzz.web.controllers.NewsReaderController.handleRequestInternal(NewsReaderController.java:87)
    at org.springframework.web.servlet.mvc.AbstractController.handleRequest(AbstractController.java:153)
    at org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter.handle(SimpleControllerHandlerAdapter.java:48)
    at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:857)
    at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:792)
    at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:475)
    at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:430)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:689)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:646)
    at org.apache.catalina.core.ApplicationDispatcher.doInclude(ApplicationDispatcher.java:551)
    at org.apache.catalina.core.ApplicationDispatcher.include(ApplicationDispatcher.java:488)
    at org.apache.taglibs.standard.tag.common.core.ImportSupport.acquireString(Unknown Source)
    at org.apache.taglibs.standard.tag.common.core.ImportSupport.doEndTag(Unknown Source)
    at org.apache.jsp.tag.web.template_tag._jspx_meth_c_005fimport_005f1(template_tag.java:816)
    at org.apache.jsp.tag.web.template_tag.doTag(template_tag.java:297)
    at org.apache.jsp.WEB_002dINF.jsp.main.map_jsp._jspx_meth_westsussex_005ftemplate_005f0(map_jsp.java:369)
    at org.apache.jsp.WEB_002dINF.jsp.main.map_jsp._jspService(map_jsp.java:171)
    at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
    at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:374)
    at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:342)
    at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:267)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:646)
    at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:436)
    at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:374)
    at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:302)
    at org.springframework.web.servlet.view.InternalResourceView.renderMergedOutputModel(InternalResourceView.java:142)
    at org.springframework.web.servlet.view.AbstractView.render(AbstractView.java:243)
    at org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1141)
    at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:878)
    at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:792)
    at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:475)
    at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:430)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:689)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293)
    at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:849)
    at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
    at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:454)
    at java.lang.Thread.run(Thread.java:662)
Cannot create JDBC driver of class '' for connect URL 'null'
java.lang.NullPointerException
    at sun.jdbc.odbc.JdbcOdbcDriver.getProtocol(JdbcOdbcDriver.java:507)
    at sun.jdbc.odbc.JdbcOdbcDriver.knownURL(JdbcOdbcDriver.java:476)
    at sun.jdbc.odbc.JdbcOdbcDriver.acceptsURL(JdbcOdbcDriver.java:307)
    at java.sql.DriverManager.getDriver(DriverManager.java:253)
    at org.apache.tomcat.dbcp.dbcp.BasicDataSource.createDataSource(BasicDataSource.java:1143)
    at org.apache.tomcat.dbcp.dbcp.BasicDataSource.getConnection(BasicDataSource.java:880)
    at org.springframework.jdbc.datasource.DataSourceUtils.doGetConnection(DataSourceUtils.java:113)
    at org.springframework.jdbc.datasource.DataSourceUtils.getConnection(DataSourceUtils.java:79)
    at org.springframework.jdbc.core.JdbcTemplate.execute(JdbcTemplate.java:328)
    at org.springframework.jdbc.core.JdbcTemplate.query(JdbcTemplate.java:404)
    at org.springframework.jdbc.core.JdbcTemplate.query(JdbcTemplate.java:412)
    at org.springframework.jdbc.core.simple.SimpleJdbcTemplate.query(SimpleJdbcTemplate.java:109)
    at com.xxxxx.yyyyy.zzzzz.dao.AirQualityJdbcDao.getAirQualityDistricts(AirQualityJdbcDao.java:26)
    at com.xxxxx.yyyyy.zzzzz.services.AirQualityServiceImpl.getAirQualityDistricts(AirQualityServiceImpl.java:116)
    at com.xxxxx.yyyyy.zzzzz.services.AirQualityServiceImpl.getCurrentHighMediumAirQualityDistricts(AirQualityServiceImpl.java:37)
    at com.xxxxx.yyyyy.zzzzz.services.NewsServiceImpl.getAirQualityAlertsInNews(NewsServiceImpl.java:166)
    at com.xxxxx.yyyyy.zzzzz.web.controllers.NewsReaderController.handleRequestInternal(NewsReaderController.java:87)
    at org.springframework.web.servlet.mvc.AbstractController.handleRequest(AbstractController.java:153)
    at org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter.handle(SimpleControllerHandlerAdapter.java:48)
    at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:8

Answer 1

不久前，但如果这对任何人都有帮助 - 我认为我的问题是我构建项目的方式。