java mysql 数据库

1. jdbc 驱动名还是数据库

String driver = "com.mysql.jdbc.Driver";
        //URL指向要访问的数据库名mydata
String url = "jdbc:mysql://localhost:3306/sqltestdb"

2.
数据库名

String user = "root";
         //MySQL配置时的密码
String password = "123456";
3.

try {
24             //加载驱动程序
25             Class.forName(driver);
26             //1.getConnection()方法，连接MySQL数据库！！
27             con = DriverManager.getConnection(url,user,password);
28             if(!con.isClosed())
29                 System.out.println("Succeeded connecting to the Database!");
30             //2.创建statement类对象，用来执行SQL语句！！
31             Statement statement = con.createStatement();
32             //要执行的SQL语句
33             String sql = "select * from emp";
34             //3.ResultSet类，用来存放获取的结果集！！
35             ResultSet rs = statement.executeQuery(sql);
36             System.out.println("-----------------");
37             System.out.println("执行结果如下所示:");
38             System.out.println("-----------------");
39             System.out.println("姓名" + "\t" + "职称");
40             System.out.println("-----------------");
41
42             String job = null;
43             String id = null;
44             while(rs.next()){
45                 //获取stuname这列数据
46                 job = rs.getString("job");
47                 //获取stuid这列数据
48                 id = rs.getString("ename");
49
50                 //输出结果
51                 System.out.println(id + "\t" + job);
52             }
53             rs.close();
54             con.close();
55         } catch(ClassNotFoundException e) {
56             //数据库驱动类异常处理
57             System.out.println("Sorry,can`t find the Driver!");
58             e.printStackTrace();
59             } catch(SQLException e) {
60             //数据库连接失败异常处理
61             e.printStackTrace();
62             }catch (Exception e) {
63             // TODO: handle exception
64             e.printStackTrace();
65         }finally{
66             System.out.println("数据库数据成功获取！！");
67         }
68     }
69
70 }