使用Java连接到数据库 [英] Connecting to database using java
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问题描述
我刚安装了mysql服务器5和NetBeans 7.1
我想知道如何使用Java连接到mysql服务器上的数据库
这是我在网上找到的代码
i have just installed mysql server 5 and NetBeans 7.1
i want to know how to use java to connect to database on mysql server
it is a code i found on net
/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/
package database_con;
import java.sql.*;
/**
*
* @author engamir
*/
public class Database_con {
/**
* @param args the command line arguments
*/
public static void main(String[] args) {
// TODO code application logic here
System.out.println("MySQL Connect Example.");
Connection conn = null;
String url = "jdbc:mysql://localhost:3306/";
String dbName = "test";
String driver = "com.mysql.jdbc.Driver";
String userName = "root";
String password = "globalamirtarek";
try
{
Class.forName("com.mysql.jdbc.Driver").newInstance();
conn = DriverManager.getConnection(url+dbName,userName,password);
System.out.println("Connected to the database");
conn.close();
System.out.println("Disconnected from database");
}
catch (ClassNotFoundException | InstantiationException | IllegalAccessException | SQLException e)
{
System.out.println(e.getMessage());
}
}
}
此代码使用ClassNotFoundException进入陷阱
我可以在Netbeans上的服务下的驱动程序"列表下找到该驱动程序,并且可以使用它连接到mysql数据库
this code enter the catch with ClassNotFoundException
i can find this Driver under Drivers list under services on Netbeans and i can connect using it to the mysql database
can any one tell me if i make something wrong?
推荐答案
看起来很自然.
当您收到ClassNotFound异常时-找不到哪个类?
请确保所有部分都在构建中:
在Netbeans中配置构建 [
looks good spontaneous.
When you get a ClassNotFound Exception - which class is not found?
Please make sure that all parts are in the build:
Configuring the build in Netbeans[^]
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