java.lang.NullPointerException at com.itheima.test.Test2.fun1(Test2.java:18) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMeth…
mapper配置文件中的namespace没有填:而且namespase的值应该填为:mapper的权限定名:否则还是会抛出异常 org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sqlSessionFactory' defined in class path resource [applicationContext-Dao.xml]: Invocation of ini…
1:问题出现的原因,部署好的hadoop-2.6.4进行window10操作hadoop api出现的错误,具体错误是我向hdfs上传文件,还好点,之前解决过,这里不叙述,这里说一下从hdfs下载文件出现的错误: 详细错误如下所示: java.lang.NullPointerException at java.lang.ProcessBuilder.start(Unknown Source) at org.apache.hadoop.util.Shell.runCommand(Shell.jav…
使用方法测试时出现以下错误 java.lang.Exception: No runnable methods at org.junit.runners.BlockJUnit4ClassRunner.validateInstanceMethods(BlockJUnit4ClassRunner.java:191) at org.junit.runners.BlockJUnit4ClassRunner.collectInitializationErrors(BlockJUnit4ClassRunner…
HTTP Status 500 - Request processing failed; nested exception is java.lang.NullPointerException type Exception report message Request processing failed; nested exception is java.lang.NullPointerException description The server encountered an internal…
编译android时,遇到报错:Errors occurred during the build.Errors running builder 'Android Pre Compiler' on project 'XXX' java.lang.NullPointerException 错误原因:工程目录下有很多.svn目录 解决方法: Open properties of project in Eclipse then Resources -> Resource filters. Click t…
搭建spring4+mybatis+springMVC访问项目时产生异常: 严重: Servlet.service() for servlet jsp threw exception java.lang.NullPointerException at org.apache.jsp.index_jsp._jspInit(index_jsp.java:22) at org.apache.jasper.runtime.HttpJspBase.init(HttpJspBase.java:52) at o…
eclipse报An error has occurred,See error log for more details. java.lang.NullPointerException错误,解决办法: 在"开始"-->"运行"---->"cmd"进入命令提示行后,再进入eclipse安装目录的eclipse文件夹, 然后输入eclipse -clean即可…
Eclipse报"An error has occurred,See error log for more details. java.lang.NullPointerException", 我先说说我是怎么报这个错的吧,我是想打开Android项目res目录中layout目录里面的.xml布局文件的时候,就会报这个错. 然后我到网上搜索了一下,一般都是那几个答案,有一些答案不行,被骂的狗血淋头,所以我都不敢尝试用网上的方法.仅仅试用了一种"在"開始"--…