急！！！为什么一直报空指针

[ZYY..]

java.lang.NullPointerException
at cn.com.zzzy.servlet.PersonalServlet.update(PersonalServlet.java:74)
at cn.com.zzzy.servlet.PersonalServlet.doPost(PersonalServlet.java:46)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
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:286)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:845)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
at java.lang.Thread.run(Unknown Source)

[yannsPeng]

要具体分析的吧。。。

[ZYY..]

接收不到值，一直都是空指针

[李大白白]

at cn.com.zzzy.servlet.PersonalServlet.update(PersonalServlet.java:74) at cn.com.zzzy.servlet.PersonalServlet.doPost(PersonalServlet.java:46) 你要发出来看看阿

[阳光越来越暖]

收不到值 要么页面没传递过来 要么接收的时候名字不对 用火狐浏览器 开发工具 查看请求里面是否有参数

[孤独与酒i]

at cn.com.zzzy.servlet.PersonalServlet.update(PersonalServlet.java:74) at cn.com.zzzy.servlet.PersonalServlet.doPost(PersonalServlet.java:46) 这两个方法发上来看看

[Be_nurturing]

把代码发上来才能看出来怎么错了

[ZYY..]

调好了

[今天晴]

at cn.com.zzzy.servlet.PersonalServlet.update(PersonalServlet.java:74) at cn.com.zzzy.servlet.PersonalServlet.doPost(PersonalServlet.java:46) 要么发代码我们帮你看，要么debug自己调