- 问题1:**java.lang.NullPointerException
at org.springframework.core.SerializableType**
原因:maven的传递依赖导致spring 4.2与spring 2.5包冲突
解决:<dependency>
<groupId>com.alibaba</groupId>
<artifactId>dubbo</artifactId>
<version>2.5.3</version>
<exclusions>
<exclusion>
<artifactId>spring</artifactId>
<groupId>org.springframework</groupId>
</exclusion>
</exclusions>
</dependency> 问题:**ClassNotFoundException:org.springframework.web.context
.ContextLoaderListener**
原因:jar包未被部署
解决:ctrl+shift+alt+s打开项目设置窗口,选择Artifacts,选择打包部署项目,选择Output Layout–》Web-INF,查看下面是否有lib目录,右边的jar包是否添加到lib目录下- 3.