1 import java.sql.*;
 2 
 3 public class MysqlTest
 4 {
 5     public static void main(String[] args) throws SQLException,ClassNotFoundException{
 6         // TODO Auto-generated method stub
 7          
 8         String url = "jdbc:mysql://localhost/xh";
 9         String username = "xiaohengdada";
10         String password = "123456";
11         //DriverManager.registerDriver(new com.mysql.jdbc.Driver());
12      
13         Class.forName("org.gjt.mm.mysql.Driver");
14      
15         Connection  connection = DriverManager.getConnection(url,username,password);
16          
17         Statement stat = connection.createStatement();
18          
19         
20         // 执行查找操作
21         ResultSet rsResultSet = stat.executeQuery("select * from students");
22          
23         while (rsResultSet.next()) {
24             System.out.println("id = "+ rsResultSet.getObject("id"));
25             System.out.println("name = "+ rsResultSet.getObject("name"));
26             System.out.println("sex = "+ rsResultSet.getObject("sex"));
27             System.out.println("age = "+ rsResultSet.getObject("age")); 
28         }
29             
30          // 执行更新操作         
31         String  sql = "update students set name = ‘xiaoheng‘ where name = ‘Ender‘";
32         System.out.println(sql);
33        int  statentnum = stat.executeUpdate(sql);
34        System.out.println(statentnum);
35         if (statentnum>0) {
36             System.out.println("update ok");
37         }
38              
39          // 执行删除操
40         sql = "delete from students where name = ‘Peter‘";
41         System.out.println(sql);
42         statentnum = stat.executeUpdate(sql);
43         System.out.println(statentnum);//为什么这里输出的结果为0
44         if (statentnum>0) {
45             System.out.println("delete ok");
46         }
47                 
48         //执行插入操作
49         sql="insert into students values(8,‘nimeide‘,‘fema‘,‘255‘)";
50         System.out.println(sql);
51         statentnum = stat.executeUpdate(sql);
52         System.out.println(statentnum);//为什么这里输出的结果为0
53         if (statentnum>0) {
54             System.out.println("insert ok");
55         }
56                 
57          // 资源的释放         
58         rsResultSet.close();
59         stat.close();
60         connection.close();
61     }
62 }