1 import java.sql.Connection;
 2 import java.sql.DriverManager;
 3
 4 /*
 5  * JDBC工具类
 6  */
 7 public class JDBCUtils {
 8     public static final String DRIVERNAME = "com.mysql.jdbc.Driver";
 9     public static final String URL = "jdbc:mysql://localhost:3306/mybase";
10     public static final String USER = "root";
11     public static final String PASSWORD = "root";
12
13     static {
14         try {
15             Class.forName(DRIVERNAME);
16         } catch (ClassNotFoundException e) {
17             System.out.println("数据库驱动注册失败！");
18         }
19     }
20
21     // 提供获取连接的方法
22     public static Connection getConn() throws Exception {
23         // 2. 获得连接
24         Connection conn = DriverManager.getConnection(URL, USER, PASSWORD);
25         // 返回连接
26         return conn;
27     }
28 }

 1 import java.sql.Connection;
 2 import java.sql.PreparedStatement;
 3 import java.sql.ResultSet;
 4
 5 public class TestJDBCUtils {
 6     public static void main(String[] args) throws Exception {
 7
 8         Connection conn = JDBCUtils.getConn();
 9         // 3获得预处理对象
10         String sql = "select * from sort";
11         PreparedStatement stat = conn.prepareStatement(sql);
12
13         ResultSet rs = stat.executeQuery();
14         // 处理结果集(遍历结果集合)
15         while (rs.next()) {
16             // 获取当前行的分类ID
17             String sid = rs.getString("sid");// 方法参数为数据库表中的列名
18             // 获取当前行的分类名称
19             String sname = rs.getString("sname");
20             // 显示数据
21             System.out.println(sid + "-----" + sname);
22         }
23         // 释放资源
24         rs.close();
25         stat.close();
26         conn.close();
27
28     }
29 }