当你在Java项目中遇到“the type java.sql.connection is not accessible”这样的错误时,通常意味着有几个可能的问题需要解决。以下是根据你的提示,分点详细解答: 检查java.sql.Connection的导入语句是否正确: Java是大小写敏感的,因此正确的导入语句应该是: java import java.sql.Connection; 而不是: java import...
出现 "java.sql.SQLException: connection holder is null" 错误通常表示在事务处理过程中，连接没有正确...
When a DDL statement is issued, Oracle implicitly issues recursive SQL statements that modify data dictionary information. Users need not be concerned with the recursive SQL internally performed by Oracle.CursorsA cursor is a handle or name for a private SQL area--an area in memory in which a...
nested exception is org.apache.commons.dbcp.SQLNestedException: Cannot create PoolableConnectionFactory...
NullPointerException: 空引用异常ClassNotFoundException: 类没有发现异常NumberFormatException: 数字格式异常 (字符串不能转化为数字)Try: 尝试Catch: 捕捉Finally: 最后Throw: 抛出Throws: (投掷) 表示强制异常处理Throwable:(可抛出的) 表示所有异常类的祖先类Lang:language, 语言Util: 工具...
there are new methods to support JDBC 4.1. This includes methods added to thejava.sql.Connection,java.sql.Driver,javax.sql.CommonDatasource, andjava.sql.Statementinterfaces. Because all methods of an interface must be implemented, previous code that uses these interfaces will not compile on Java...
AccessibleRelationSet AccessibleResourceBundle AccessibleRole AccessibleSelection AccessibleState AccessibleStateSet AccessibleStreamable AccessibleTable AccessibleTableModelChange AccessibleText AccessibleTextSequence AccessibleValue AccountException AccountExpiredException AccountLockedException AccountNotFo...
当然,我们在应用程序中可以这样,insert/delete/update这些更新数据库的操作,用connection(for master)进行操作,select 用 connection(for slaves)进行操作。那我们的应用程序还要完成怎么从 slaves 选择一个来执行 select,例如使用简单的轮循算法。 这样的话,相当于应用程序完成了 SQL 语句的路由,而且与 MySQL 的主从复...
获取与此 Connection 对象关联的 Map 对象。参数类型为 Class 的java.sql 中的方法 <T extends Source> T SQLXML.getSource(Class<T> sourceClass) 返回读取此 SQLXML 实例指定的 XML 值的 Source。 boolean Wrapper.isWrapperFor(Class<?> iface) 如果调用此方法的对象实现接口参数,或者是实现接口参数的对...
java.sql.Connection Modifier and TypeConstant FieldValue public static final intTRANSACTION_NONE 0 public static final intTRANSACTION_READ_COMMITTED 2 public static final intTRANSACTION_READ_UNCOMMITTED 1 public static final intTRANSACTION_REPEATABLE_READ 4 public static final intTRANSACTION_SERIALIZABLE 8...