码迷,mamicode.com
首页 > 数据库 > 详细

java学习笔记--JDBC实例

时间:2018-04-29 21:11:27      阅读:200      评论:0      收藏:0      [点我收藏+]

标签:int   result   close   change   read   ret   ring   加载驱动   root   

使用的数据库:

mysql> use xiao;
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A

Database changed
mysql> show tables;
+----------------+
| Tables_in_xiao |
+----------------+
| students       |
+----------------+
1 row in set (0.00 sec)

mysql> desc students;
+-------+---------------------+------+-----+---------+----------------+
| Field | Type                | Null | Key | Default | Extra          |
+-------+---------------------+------+-----+---------+----------------+
| id    | int(10) unsigned    | NO   | PRI | NULL    | auto_increment |
| name  | char(8)             | NO   |     | NULL    |                |
| sex   | char(4)             | NO   |     | NULL    |                |
| age   | tinyint(3) unsigned | NO   |     | NULL    |                |
| tel   | char(13)            | YES  |     | -       |                |
+-------+---------------------+------+-----+---------+----------------+
5 rows in set (0.04 sec)

mysql> select * from students;
+----+---------+-----+-----+-------------+
| id | name    | sex | age | tel         |
+----+---------+-----+-----+-------------+
|  1 | xiaoye  | m   |  31 | 15711580618 |
|  2 | heilong | m   |  31 | 13313812130 |
|  3 | baba    | m   |  60 | 13313818223 |
|  4 | xiaoye  | m   |  30 | 17750311103 |
+----+---------+-----+-----+-------------+
4 rows in set (0.00 sec)

mysql>

 

java例子:

import com.mysql.jdbc.Driver;

import java.sql.*;

public class JDBCTest {
public static void main(String[] args) {
Connection connection = new JDBCTest().getConnection(); //调用getConnection方法
try {
Statement statement = connection.createStatement();
ResultSet resultSet = statement.executeQuery("select * from students;"); //executeQuery executeUpdate execute 的区别
while(resultSet.next()) {  //循环resultSet,调用next()移动至第一条数据,没有hasnext()方法;
int id = resultSet.getInt(1);
String name = resultSet.getString(2);
String sex = resultSet.getString(3);
int age = resultSet.getInt(4);
String tel = resultSet.getString(5);
System.out.println(id + " " + name + " " + sex + " " + age + " " + tel + ";");
}

} catch (SQLException e) {
e.printStackTrace();
}finally {
try {
connection.close();
} catch (SQLException e) {
e.printStackTrace();
}
}

}

public Connection getConnection() {
try {
Class.forName("com.mysql.jdbc.Driver");  //加载驱动
return DriverManager.getConnection("jdbc:mysql://localhost:3306/xiao","root","×××××××"); //链接数据库 注意ruturn
} catch (Exception e) {
e.printStackTrace();
}
return null;  //return
}
}

java学习笔记--JDBC实例

标签:int   result   close   change   read   ret   ring   加载驱动   root   

原文地址:https://www.cnblogs.com/xiaonihao444/p/8971849.html

(0)
(0)
   
举报
评论 一句话评论(0
登录后才能评论!
© 2014 mamicode.com 版权所有  联系我们:gaon5@hotmail.com
迷上了代码!