Getting Exception org.apache.logging.slf4j.SLF4JLoggerContext cannot be cast to org.apache.logging.log4j.core.LoggerContext 问题原因:jar包版本的问题 换为:1.2.8就没有问题了…

一.错误信息 java.lang.ClassCastException: org.slf4j.impl.Log4jLoggerFactory cannot be cast to ch.qos.logback.classic.LoggerContextat ch.qos.logback.ext.spring.LogbackConfigurer.initLogging(LogbackConfigurer.java:72)at ch.qos.logback.ext.spring.web.WebLogb…

查看日志信息: SLF4J: Class path contains multiple SLF4J bindings. SLF4J: Found binding in [jar:file:/app/apache-tomcat-docbase/mmsi/WEB-INF/lib/slf4j-simple-1.6.4.jar!/org/slf4j/impl/StaticLoggerBinder.class] SLF4J: Found binding in [jar:file:/app/apache-t…

excerpted from Type conversions K&R Section 2.7 p59 对type conversion 的解释: The precise meaning of a cast is as if the expression were assigned to a variable of the specified type, which is then used in place of the whole construction. (类型名) 表达式 将被转换的表…

java.lang.ClassCastException: com.sun.proxy.$Proxy* cannot be cast to***问题解决方案 临床表现: 病例: 定义代理类: @Transactional @Repository public UserDaoImpl implements UserDao extends BaseDaoImpl{ /*没有实现任何接口*/ } 获取代理类: ApplicationContext ctx = new ClassPathXmlAppli…

今天在整合ssh三个框架时,有一个功能,是查询所有员工信息,且员工表和部门表是多对一的映射关系,代码能正常运行到查询得到一个List集合,但在页面展示的时候,就报异常了, java.lang.ClassCastException: com.ch.hibernate.Department_$$_javassist_0 cannot be cast to javassist.util.proxy.Proxy 问题应该出在实体类Department上,然后我参照网上的解释,将Department.hb…

  Login / Register Developer Zone Bugs Home Report a bug Statistics Advanced search Saved searches Tags Bug #73054 CAST function should support INT synonym for SIGNED. i.e. CAST(y AS INT) Submitted: 19 Jun 2014 15:55 Modified: 30 Jun 2014 11:12 Repor…

1.Java api public T cast(Object obj); Casts an object to the class or interface represented 解释的比较笼统,意思就是将一个对象装换为类或者接口. 2.代码示例 /** * Created by shengke on 2016/10/22. */ class A { public static void show() { System.out.println("Class A show() function…

开发人员测试时,发现生产服务器与测试服务器执行SELECT CAST(GETDATE() AS VARCHAR(10))语句显示的格式不一样.如下所示 Server A Server B 其实出现这个问题,是因为登录名(login)的语言不一致所致,如下所示 可以使用下面SQL语句来检查对应的默认语言 SELECT @@LANGUAGE   或   SELECT loginname,name, language FROM sys.syslogins 上面出现不一致是因为同一登录名的默认语言在服务…

背景: 前段时间,业务需要,为了快速让解析的Excel入库,所以把不是很确定的字段全部设置成了TEXT. 今天需要进行表结构优化,把字段长度控制在合适的范围,并尽量不使用TEXT类型. -- 计算长度select LENGTH(CAST(fileName AS CHAR)) from files; select MAX(LENGTH(CAST(fileName AS CHAR))) from files; select LENGTH(CAST(fileName AS CHAR)) as le f…