java连接mysql

 1 import java.sql.*;
 2 
 3 public class MysqlTest {
 4     public static void main(String[] args) {
 5         // 驱动程序名
 6         String driver = "org.gjt.mm.mysql.Driver";
 7         // URL指向要访问的数据库名world
 8         // String url = "jdbc:mysql://127.0.0.1:3306/xh";
 9         String url = "jdbc:mysql://localhost/xh";
10         // MySQL配置时的用户名
11         String user = "xiaohengdada";
12         // MySQL配置时的密码
13         String password = "123456";
14         String name;
15         try {
16             // 加载驱动程序
17             Class.forName(driver);
18             // 连续数据库
19             Connection conn = DriverManager.getConnection(url, user, password);
20             if (!conn.isClosed())
21                 System.out.println("Succeeded connecting to the Database!");
22             // statement用来执行SQL语句
23             Statement statement = conn.createStatement();
24             // 要执行的SQL语句
25             String sql = "select * from students";
26 
27             // 结果集
28             ResultSet rs = statement.executeQuery(sql);
29             System.out.println(rs);
30             System.out.println("Succeeded connecting to the Database!");
31             while (rs.next()) {
32                 // 选择Name这列数据
33                 name = rs.getString("name");
34                 // 输出结果
35                 System.out.println(name);
36             }
37             rs.close();//关闭当前的结果集
38             statement.close();//关闭statement对象以及所对应的结果集
39             conn.close();//关闭当前的连接以及释放由它所创建的JDBC资源
40         } catch (ClassNotFoundException e) {
41             System.out.println("Sorry,can`t find the Driver!");
42             e.printStackTrace();
43         } catch (SQLException e) {
44             e.printStackTrace();
45         } catch (Exception e) {
46             e.printStackTrace();
47         }
48     }
49 }

需要在mysql建立相关数据库及表。

 1 import java.sql.*;
 2 
 3 public class MysqlTest
 4 {
 5     public static void main(String[] args)
 6     {
 7         String driver="org.gjt.mm.mysql.Driver";
 8         String url="jdbc:mysql://localhost/xh";
 9         String user="xiaohengdada";
10         String password="123456";
11         //int id;
12         int id1;
13     
14     
15     try
16     {
17         Class.forName(driver);
18         Connection conn=DriverManager.getConnection(url,user,password);
19         if (!conn.isClosed())
20             System.out.println("Succeeded connecting to be Database!");
21         
22         Statement statement=conn.createStatement();
23         ResultSet rs=statement.executeQuery("select * from students");
24         
25         System.out.println(rs);
26         while(rs.next())
27         {
28             id1=rs.getInt("id");
29             System.out.println(id1);
30         }
31         rs.close();
32         statement.close();
33         conn.close();    
34     }
35     catch(ClassNotFoundException e)
36     {
37         System.out.println("Sorry,can‘t find the Driver!");
38         e.printStackTrace();
39     }
40     catch(SQLException e)
41     {
42         e.printStackTrace();
43     }
44     catch(Exception e)
45     {
46         e.printStackTrace();
47     }
48     }
49 }