# java.sql.Connection
java.sql.Connection是数据库连接接口。
表1对java.sql.Connection接口的支持情况 
| 方法名                                     | 返回值类型             | 支持JDBC 4 |
|:---|:---|:---|
| close()                                 | void              | Yes      |
| commit()                                | void              | Yes      |
| createStatement()                       | Statement         | Yes      |
| getAutoCommit()                         | boolean           | Yes      |
| getClientInfo()                         | Properties        | Yes      |
| getClientInfo(String name)              | String            | Yes      |
| getTransactionIsolation()               | int               | Yes      |
| isClosed()                              | boolean           | Yes      |
| isReadOnly()                            | boolean           | Yes      |
| prepareStatement(String sql)            | PreparedStatement | Yes      |
| rollback()                              | void              | Yes      |
| setAutoCommit(boolean autoCommit)       | void              | Yes      |
| setClientInfo(Properties properties)    | void              | Yes      |
| setClientInfo(String name,String value) | void              | Yes      |