springboot提交表单提示NullPointerException

This application has no explicit mapping for /error, so you are seeing this as a fallback.

Wed Apr 24 12:54:08 CST 2019
There was an unexpected error (type=Internal Server Error, status=500).
No message available
java.lang.NullPointerException
    at com.apitest.service.impl.ApplicationTableServiceImpl.insert(ApplicationTableServiceImpl.java:51)
    at com.apitest.controler.AddDeleteAndChangeControler.ProjectinfoTemp(AddDeleteAndChangeControler.java:59)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)

专注于为中小企业提供网站制作、成都网站制作服务,电脑端+手机端+微信端的三站合一,更高效的管理,为中小企业猇亭免费做网站提供优质的服务。我们立足成都，凝聚了一批互联网行业人才，有力地推动了1000+企业的稳健成长，帮助中小企业通过网站建设实现规模扩充和转变。

修改写法：

程序运行正常

标题名称：springboot提交表单提示NullPointerException
当前网址：http://bzwzjz.com/article/giehgd.html