原址:http://blog.csdn.net/y3wegy/article/details/7840813 最近在研究Hibernate.过程当中碰到了很多问题啊!其中一个就是not found while looking for property错误 Caused by: org.hibernate.MappingException: class main.java.POJO.User not found while looking for property: id 配置文件如下: <?xm…

EF 序列化返回json时 报错:Self referencing loop detected for property 解决方案:在webapiconfig.cs文件中,增加设置: 1.config.Formatters.JsonFormatter.SerializerSettings.ReferenceLoopHandling=Newtonsoft.Json.ReferenceLoopHandling.Serializer; 2.Config.Fomatters.JsonFormatter.…

在eclipse中启动tomcat时出现Setting property 'source' to 'org.eclipse.jst.jee.server:你的站点名'   did not find a matching property错误 解决办法: 1.在server控制台内,在服务器上点右键--属性 2.general选项卡中点switch location 这时,location变为:/servers/tomcat6.0 server at localhost.server 3.在pro…

正确写法: @Override @SuppressWarnings("unchecked") public List<Device> queryOSDevice(String cpu){ String sql = null; if(cpu.equals("os_xp")){ sql = "from "+this.clazz.getName()+" this WHERE this.os.id = (select id from…

错误1:MappingException: Unknown entity解决方案 http://jingyan.baidu.com/article/e75aca8552761b142edac6cf.html 错误2:Could not bind factory to JNDI 2006-07-23 23:14:53,796 [main] WARN org.hibernate.impl.SessionFactoryObjectFactory - Could not bind factory to…

链接地址:http://bbs.csdn.net/topics/390131469 警告: [SetContextPropertiesRule]{Context} Setting property 'source' to 'org.eclipse.jst.jee.server:Testweb' did not find a matching property. 在eclipse中启动tomcat时出现Setting property 'source' to 'org.eclipse.jst.je…

    ***每存在一对接口和xml文件,必须在xml文件中定义好mapper标签及namespace     ***每对接口必须和xml文件名必须一致 <mapper>标签中的namespace属性,属性名不能写错,属性值一定要接口的全类名,同时,接口中的抽象方法,和XML文件中的标签id也一定要对应     否则,错误信息显示为:invaild bound statement(不明确的关联关系) sqlMapConfig.xml文件一定要放在src目录下,而不是某个包中     否则,no…

错误1:org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired -- ::, [pool--thread--EventThread] WARN org.apache.hadoop.hbase.client.ConnectionManager$HConnectionImplementation - This client just lost it's sessio…

[root@node001 bin]# hbase shell SLF4J: Class path contains multiple SLF4J bindings. SLF4J: Found binding in [jar:file:/opt/aisino/hbase-1.2.6/lib/slf4j-log4j12-1.7.5.jar!/org/slf4j/impl/StaticLoggerBinder.class] SLF4J: Found binding in [jar:file:/opt…

正文从这开始~ 总览 当我们用一个null值初始化一个ref,但在其类型中不包括null时,就会发生"Cannot assign to 'current' because it is a read-only property"错误.为了解决该错误,请在ref的类型中包含null.比如说,const ref = useRef<string | null>(null) . 这里有个例子来展示错误是如何发生的. // App.tsx import {useEffect, useR…