Question

运行jsp文件时出现错误500 是什么原因？

HTTPステータス 500 -
type 例外レポート
メッセージ
说明 The server encountered an internal error () that prevented it from fulfilling this request.
例外
java.lang.NullPointerException
sun.misc.FloatingDecimal.readJavaFormatString(FloatingDecimal.java:991)
java.lang.Double.valueOf(Double.java:475)
com.changeUtil.shapeMoney(changeUtil.java:63)
dao.ContributorInfoSearchDao.GGFindByKey(ContributorInfoSearchDao.java:277)
service.ContributorInfoSearchService.findByKey(ContributorInfoSearchService.java:93)
action.ContributorInfoSearchAction.doSearch(ContributorInfoSearchAction.java:59)
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
java.lang.reflect.Method.invoke(Method.java:597)
com.opensymphony.xwork2.DefaultActionInvocation.invokeAction(DefaultActionInvocation.java:452)
com.opensymphony.xwork2.DefaultActionInvocation.invokeActionOnly(DefaultActionInvocation.java:291)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:254)
com.opensymphony.xwork2.interceptor.DefaultWorkflowInterceptor.doIntercept(DefaultWorkflowInterceptor.java:176)
com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)

Answer 1

空指针，这是后台或前端取值为空造成的。

Answer 2

空指针异常，肯定是你代码取值那一块错了，用调试模式查一下