SSH常见错误默认

SSH常见错误默认分类 2010-12-04 17:31:35 阅读77 评论18   字号：大中小 订阅 .

1. 
org.hibernate.id.IdentifierGenerationException: ids for this class must be manually assigned before calling save(): 
原因：<id>元素配置不正确，<id>元素缺少其子元素<generator></generator>的配置。解决方法：<id>元素映射了相应数据库表的主键字段，对其子元素<generator class="">,其中class的取值可以为increment、identity、sequence、hilo、native......等，一般取其值为native 。 
2. 
java.lang.IllegalArgumentException: id to load is required for loading 
方案:Users user=(Users)this.getHibernateTemplate().get(Users.class, id);如果以用户名为参数不能用此方法 
3. 
org.springframework.dao.InvalidDataAccessResourceUsageException: could not execute query; nested exception is org.hibernate.exception.SQLGrammarException: could not execute query 
方案：sql语句有错误 
4. 
严重: Error starting static Resources 
java.lang.IllegalArgumentException: Document base D:\Program Files\Apache Software Foundation\Tomcat 5.0\webapps\tomcat-docs does not exist or is not a readable directory 
严重: Error in resourceStart() 
2007-6-6 23:32:25 org.apache.catalina.core.StandardContext start 
严重: Error getConfigured 
2007-6-6 23:32:25 org.apache.catalina.core.StandardContext start 
严重: Context startup failed due to previous errors 
2007-6-6 23:32:25 org.apache.catalina.core.StandardContext start 
严重: Exception during cleanup after start failed 
LifecycleException: Container StandardContext[/tomcat-docs] has not been started 
5.jsf+spring+hibernate 
严重: Exception sending context initialized event to listener instance of class org.springframework.web.context.ContextLoaderListener 
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'dataSource' defined in ServletContext resource [/WEB-INF/applicationContext.xml]: Instantiation of bean failed; nested exception is java.lang.NoClassDefFoundError: org/apache/commons/pool/impl/GenericObjectPool 
Caused by: java.lang.NoClassDefFoundError: org/apache/commons/pool/impl/GenericObjectPool 
严重: Error listenerStart 
2007-6-8 10:31:55 org.apache.catalina.core.StandardContext start 
严重: Context [/shj01] startup failed due to previous errors 
2007-6-8 10:31:55 org.apache.catalina.core.ApplicationContext log