mysql-connector-java-5.1.21
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MySQL Connector/J是MySQL数据库与Java应用程序之间的重要桥梁,它是一个实现了Java Database Connectivity (JDBC) API的驱动程序,使得Java开发者能够方便地在MySQL数据库上执行CRUD(创建、读取、更新、删除)操作。标题中的"mysql-connector-java-5.1.21"是指这个特定版本的驱动,它是MySQL 5.x系列的一个稳定版本,适用于那些需要与MySQL 5.1版本兼容的Java应用。 JDBC是Java中用于访问数据库的标准接口,由Sun Microsystems(现已被Oracle收购)开发并定义在java.sql包中。它提供了一系列的接口和类,使得程序员可以通过编写Java代码来执行SQL语句,处理结果集,管理事务等。MySQL Connector/J是MySQL官方推荐的JDBC驱动,它实现了JDBC规范,提供了与MySQL数据库的连接功能。 在"mysql-connector-java-5.1.21"压缩包中,通常会包含以下组件: 1. **JAR文件**:如`mysql-connector-java-5.1.21.jar`,这是驱动的核心文件,包含了所有必要的类和资源,Java应用通过引入这个JAR到类路径中,就可以使用JDBC API与MySQL数据库进行通信。 2. **文档**:可能包括README文件,提供了安装和使用驱动的基本指南,以及CHANGES或RELEASE NOTES,列出了该版本相对于前一个版本的改进和修复的问题。 3. **许可文件**:如LICENSE和NOTICE,详细说明了软件的使用条款和版权信息,确保合规性。 4. **示例代码**:有时会包含示例Java代码,展示如何配置和使用MySQL Connector/J。 使用MySQL Connector/J的过程大致如下: 1. **添加依赖**:将`mysql-connector-java-5.1.21.jar`文件添加到项目类路径中,对于Maven项目,可以在pom.xml中添加对应的依赖条目。 2. **建立连接**:通过`DriverManager.getConnection()`方法,传入数据库URL、用户名和密码来创建数据库连接。 3. **注册驱动**:虽然在JDBC 4.0及以上版本,驱动会自动注册,但在较旧版本中,需要先调用`Class.forName()`加载驱动类。 4. **执行SQL**:通过`Connection`对象创建`Statement`或`PreparedStatement`,然后执行SQL语句。 5. **处理结果**:获取`ResultSet`,遍历并处理查询结果。 6. **关闭资源**:在操作完成后,记得关闭`ResultSet`、`Statement`和`Connection`,以释放系统资源。 MySQL Connector/J 5.1.21相比更早的版本,可能会有一些性能优化、新特性支持或已知问题的修复。不过,随着MySQL版本的更新,新的数据库特性可能需要更高版本的驱动才能完全支持,因此,保持驱动与数据库版本的匹配是非常重要的。 在实际开发中,除了基本的JDBC操作,还可以利用连接池技术(如C3P0、HikariCP等)来提高数据库连接的复用性和效率,进一步提升应用性能。同时,对于大型应用,了解和掌握JDBC事务管理、批处理操作以及预编译的SQL语句(PreparedStatement)也是十分必要的。
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- u0106737552014-01-18很好的驱动!!!
- socall2014-09-30很好的驱动,用着不错
- qq_151409332014-11-09不错,驱动可用
- marcel_man2012-09-07很新的驱动!
- 前进rabbit2013-03-08很好的驱动,用着不错
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