上传报错

[yibo2010]

java.lang.NullPointerException
	at hlgm.oa.struts.action.TongzhiAction.addtongzhi(TongzhiAction.java:150)
	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.apache.struts.actions.DispatchAction.dispatchMethod(DispatchAction.java:270)
	at org.apache.struts.actions.DispatchAction.execute(DispatchAction.java:187)
	at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:431)
	at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:236)
	at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196)
	at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:432)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:710)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:70)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
	at org.springframework.orm.hibernate3.support.OpenSessionInViewFilter.doFilterInternal(OpenSessionInViewFilter.java:198)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
	at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:96)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:230)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:104)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:261)
	at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
	at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:581)
	at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
	at java.lang.Thread.run(Unknown Source)

第150 行代码

code=Java] /*
* 上传文件的路径---upload
*/

String dir = servlet.getServletContext().getRealPath("/upload/");[[/code]

[碧海情天-赵亮]

技术环境没说清楚.
网上讨论此类问题的一般原因都是因为所采用的技术组合(struts+spring)导致应该使用新的方法去代替使用servlet.或者说servlet被更好的方法给劫持了.

[yibo2010]

环境 (struts+spring+hibnate)

[yibo2010]

servlet.getServletContext() 打印 这句话时候也报同样的错误

[孟子E章]

servlet==null了
你需要
class TongzhiAction
extends ActionSupport implements ServletRequestAware, ServletResponseAware, ServletContextAware

[qianquan]

建议检查一下 上传文件控件的名字

[孟子E章]

检查servlet是否为null，servlet.getServletContext()是否为null

[碧海情天-赵亮]

和我说的那种情况是一样的了.这种情况,一般都是spring劫持了servlet.应该去使用spring里实现相应功能的方法.

[yibo2010]

[Quote=引用 7 楼 theforever 的回复:]
和我说的那种情况是一样的了.这种情况,一般都是spring劫持了servlet.应该去使用spring里实现相应功能的方法.
[/Quote]


具体怎么配置？

[wanglihongzhoujielun]

环境的问题吧？？

[yibo2010]

解决了， 就是form 要加个配置！