今天在整合SSM框架中,内容是从数据库中读取所有商品信息,写完之后一测试,服务器一直报nested exception is java.lang.NullPointerException错误,然后浏览器 报500,最后终于找到问题的所在,原来是在springMvc的controller中注入Servcie时没有加上注解@Resource,这样在配置文件中就无法读取到信息所以报错,加上之后问题解决,下面是一些截图及代码展示:
1.报错时的代码及浏览器截图
2.修改后的代码及截图展示
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SSM框架报HTTP Status 500 - Request processing failed; nested exception is java.lang.NullPointerException错
message Request processing failed; nested exception is java.lang.NullPointerException
Failed to start bean 'documentationPluginsBootstrapper'; nested exception is java.lang.NullPointerException
Request processing failed; nested exception is java.lang.NullPointerException
Request processing failed; nested exception is java.lang.NullPointerException
Servlet.service() for servlet [dispatcherServlet] in context with path [/heima_ssm_web] threw exception [Request processing failed; nested exception is java.lang.NullPointerException] with root cause
【随手记录】关于Factory method 'eurekaApplicationInfoManager' threw exception; nested exception is java.lang.NullPointerException
?--Porg.springframework.beans.MethodInvocationException: Property 'username' threw exception; nested exception is java.lang.NullPointerException
Exception in thread "main" java.lang.NullPointerException
解决报错 Failed to start bean 'documentationPluginsBootstrapper'; nested exception is java.lang.NullPointerException