JDBC的操作

 package com.liuxianglin.demo.util;

 import java.sql.Connection;
 import java.sql.DriverManager;
 import java.sql.PreparedStatement;
 import java.sql.ResultSet;
 import java.sql.SQLException;
 import java.sql.Statement;

 /**
  * 数据库连接工具类
  *
  * @author Back
  *
  */
 public class DBUtil {

     public Connection getConn() {
         String className = "com.mysql.jdbc.Driver";
         Connection conn = null;
         String url = "jdbc:mysql://localhost:3306/lis";
         String user = "root";
         String password = "123456";
         // 加载驱动
         try {
             Class.forName(className);
             // 通过驱动管理类管理JDBC服务
             conn = DriverManager.getConnection(url, user, password);
         } catch (ClassNotFoundException e) {
             e.printStackTrace();
         } catch (SQLException e) {
             e.printStackTrace();
         }
         return conn;
     }

     // 通用数据库关闭方法
     public void close(ResultSet rs, Statement st, PreparedStatement pstm, Connection conn) {
         if (rs != null) {
             try {
                 rs.close();
             } catch (SQLException e) {
                 e.printStackTrace();
             } finally {
                 rs = null;
             }
         }
         if (st != null) {
             try {
                 st.close();
             } catch (SQLException e) {
                 e.printStackTrace();
             } finally {
                 st = null;
             }
         }
         if (pstm != null) {
             try {
                 pstm.close();
             } catch (SQLException e) {
                 e.printStackTrace();
             } finally {
                 pstm = null;
             }
         }
         if (conn != null) {
             try {
                 conn.close();
             } catch (SQLException e) {
                 e.printStackTrace();
             } finally {
                 conn = null;
             }
         }
     }

 }