新人空指针异常求助

[qq_34835094]

java.lang.NullPointerException
at com.zhfc.soar.zscg.service.Impl.BDCon.doView(BDCon.java:45)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:317)
at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:183)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:150)
at org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation(TransactionInterceptor.java:96)
at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:260)
at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:94)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:204)
at com.sun.proxy.$Proxy1324.doView(Unknown Source)
at com.zhfc.soar.zscg.action.StuAction.view(StuAction.java:110)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)



代码如下
public List doView(StuMassage Stu){
String id=Stu.getId();
JdbcTemplate jdbcTemplate = (JdbcTemplate) Framework.getEngine().getContainer().getComponent("jdbcTemplate");
return jdbcTemplate.queryForList("select * from CZX_STU where id=" + Stu.getId() + "");
}
--------------------------------------------------------------------------------------
public String view(){
try {
this.viewService.doView(Stu);
}catch (Exception e){
e.printStackTrace();
}
return "success";
}

[qq_20960265]

this.viewService.doView(Stu); 传的stu是否为null 打印一下或者(JdbcTemplate) Framework.getEngine().getContainer().getComponent("jdbcTemplate"); 打印一下jdbcTemplate 查看一下jdbcTemplate 是否为null 。需要这样逐步排查

[qq_34835094]

好的 我试试

[尼古拉斯-全蛋]

at com.zhfc.soar.zscg.service.Impl.BDCon.doView(BDCon.java:45)

[shumo1128]

一点点测.看对象有没有值先..前面的代码看懂了...后面的是做什么的? JdbcTemplate jdbcTemplate = (JdbcTemplate) Framework.getEngine().getContainer().getComponent("jdbcTemplate"); return jdbcTemplate.queryForList("select * from CZX_STU where id=" + Stu.getId() + ""); 这段代码时做什么的???