java.lang.UnsupportedOperationException: Exception occurred during processing request: null

做了2个action,其中一个运行没有问题,另一个报错,看下面的报错信息,再看了看struts.xml,因为没有给GetBooks这个action配置actionform,所以就导致报null.下面是有问题的struts.xml,其中主要的问题就是没有给GetBooks这个action配置actionform,也就是没有添加那个interceptor-ref name="integration",添加上就好了(这个form在应用的逻辑里面,GetBooks是不需要form的,但是可能是

ERROR Dispatcher:38 - Exception occurred during processing request: id to load is required for loadingjava.lang.IllegalArgumentException: id to load is required for loading at org.hibernate.event.LoadEvent.<init>(LoadEvent.java:89) at org.hibernate.

今天在编码的时候遇到了 Exception occurred during processing request: could not extract ResultSet; SQL [n/a]; nested exception is org.hibernate.exception.SQLGrammarException: could not extract ResultSet这个问题,也是找了老半天不懂什么原因,后来找了好多论坛,总结了一下,只要出现了sql的问题,基本都是bean或者XXX.

hbase 执行批量删除时出现错误: Exception in thread "main" java.lang.UnsupportedOperationException at java.util.AbstractList.remove(AbstractList.java:161) at org.apache.hadoop.hbase.client.HTable.delete(HTable.java:852) 这种异常其实很常见,remove操作不支持,为什么会出现不支持的情况呢?检查

mybatis 的mapper配置的select查询语句,报java.lang.UnsupportedOperationException 内容如下: org.mybatis.spring.MyBatisSystemException: nested exception is org.apache.ibatis.exceptions.PersistenceException: ### Error querying database. Cause: java.lang.UnsupportedOpe

遇到这个bug: 末尾是解决方法.  E/AndroidRuntime: FATAL EXCEPTION: main                                                                         Process: com.XX.XX.XX, PID: 7055                                                                         java.lang.Runt

在项目中采用一个枚举的集合,本人采用Collections中的空集合Collections.emptyList()在添加时发生异常: 常见集合如下: private List<VacationCategory> vacationcategorys = Collections.emptyList(); 报错误如下: -- Encapsulated exception ------------\java.lang.UnsupportedOperationException at java.util

在项目中对List进行操作时报错java.lang.UnsupportedOperationException,后来发现操作的List是由数组转换而成的,通过看源码发现问题,并写测试程序如下. 代码块: public class ListTest { public static void main(String[] args) { String[] array = {"1","2","3","4","5"}

干货 java.lang.UnsupportedOperationException at android.view.GLES20Canvas.clipPath(GLES20Canvas.java:287) at br.com.iba.view.PageCurlView.drawCurl(PageCurlView.java:284) at br.com.iba.view.PageCurlView.onDraw(PageCurlView.java:353) at android.view.View