Java连接示例

<p>Java连接示例如下:</p> <table border="0" cellpadding="0" cellspacing="0"> <tbody> <tr> <td style="background-color:#f7f8fa"> <p><span style="font-family:Consolas">import java.sql.*;</span></p> <p><span style="font-family:Consolas">import com.mysql.jdbc.Driver;</span></p> <p><span style="font-family:Consolas">public class Demo {</span></p> <p><span style="font-family:Consolas">&nbsp;&nbsp;&nbsp; public static void main(String[] args) throws SQLException, ClassNotFoundException{</span></p> <p><span style="font-family:Consolas">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; String url = &quot;jdbc:mysql://<strong>&lt;</strong><strong>域名&gt;</strong>:<strong>&lt;</strong><strong>端口&gt;</strong>/<strong>&lt;Database&gt;</strong>&quot;;</span></p> <p><span style="font-family:Consolas">String user = &quot;&lt;username&gt;&quot;;<br /> String pwd= &quot;&lt;password&gt;&quot;;</span></p> <p><span style="font-family:Consolas">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; String driverName =&quot;com.mysql.jdbc.Driver&quot;;</span></p> <p><span style="font-family:Consolas">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Connection conn = null;</span></p> <p><span style="font-family:Consolas">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; String sql = &quot;SELECT * FROM t&quot;;</span></p> <p><span style="font-family:Consolas">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; try{</span></p> <p><span style="font-family:Consolas">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; //加载驱动</span></p> <p><span style="font-family:Consolas">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Driver.class.forName(driverName);</span></p> <p><span style="font-family:Consolas">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; //建立连接</span></p> <p><span style="font-family:Consolas">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; conn = DriverManager.getConnection(URL,username,password);</span></p> <p><span style="font-family:Consolas">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; //创建statement执行SQL语句</span></p> <p><span style="font-family:Consolas">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Statement ps =&nbsp; conn.createStatement();</span></p> <p><span style="font-family:Consolas">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; //结果集处理</span></p> <p><span style="font-family:Consolas">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; ResultSet rs = ps.executeQuery(sql);</span></p> <p><span style="font-family:Consolas">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; while(rs.next()) {</span></p> <p><span style="font-family:Consolas">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; System.out.println(rs.getString(&quot;id&quot;));</span></p> <p><span style="font-family:Consolas">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; }</span></p> <p><span style="font-family:Consolas">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; }</span></p> <p><span style="font-family:Consolas">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;catch (ClassNotFoundException e) {</span></p> <p><span style="font-family:Consolas">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; e.printStackTrace();</span></p> <p><span style="font-family:Consolas">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; }</span></p> <p><span style="font-family:Consolas">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; catch(SQLException e){</span></p> <p><span style="font-family:Consolas">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; e.printStackTrace();</span></p> <p><span style="font-family:Consolas">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; }</span></p> <p><span style="font-family:Consolas">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; //关闭连接</span></p> <p><span style="font-family:Consolas">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; finally{</span></p> <p><span style="font-family:Consolas">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; if(conn!=null){</span></p> <p><span style="font-family:Consolas">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; try{</span></p> <p><span style="font-family:Consolas">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; conn.close();</span></p> <p><span style="font-family:Consolas">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; }catch(SQLException e){</span></p> <p><span style="font-family:Consolas">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; e.printStackTrace();</span></p> <p><span style="font-family:Consolas">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; }</span></p> <p><span style="font-family:Consolas">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; }</span></p> <p><span style="font-family:Consolas">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; }</span></p> <p><span style="font-family:Consolas">&nbsp;&nbsp;&nbsp; }</span></p> <p><span style="font-family:Consolas">}</span></p> </td> </tr> </tbody> </table>
以上内容是否解决了您的问题?
请补全提交信息!
咨询·建议

电话咨询 - 7x24 小时

400-151-8800

邮件咨询

cloud@pingan.com

在线客服

7x24 小时,急速解答

工单支持

解决云产品相关技术问题