寫了一個測試資料庫是否能連線成功的工具包

package mysql;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
public class TestMysqlConnection {

    public static Connection getConnection(){
        String driver;  //獲取mysql資料庫的驅動類
 

        driver = "com.mysql.jdbc.Driver";
        String url="jdbc:mysql://localhost:3306/test"; //連線資料庫（kucun是資料庫名）
        String name="root";//連線mysql的使用者名稱
        String pwd="root";//連線mysql的密碼
        System.out.println("driver:" +driver);
        System.out.println("url:" +url);
        System.out.println("name:"
 
 +name);
        System.out.println("pwd:" +pwd);
        try{
            Class.forName(driver);
            Connection conn=DriverManager.getConnection(url,name,pwd);//獲取連線物件
            return conn;
        }catch(ClassNotFoundException e){
            e.printStackTrace();
            return null;
        }catch
 
(SQLException e){
            e.printStackTrace();
            return null;
        }
    }
    public static void closeAll(Connection conn,PreparedStatement ps,ResultSet rs){
        try{
            if(rs!=null){
                rs.close();
            }
        }catch(SQLException e){
            e.printStackTrace();
        }
        try{
            if(ps!=null){
                ps.close();
            }
        }catch(SQLException e){
            e.printStackTrace();
        }
        try{
            if(conn!=null){
                conn.close();
            }
        }catch(SQLException e){
            e.printStackTrace();
        }
    }
    public static void main(String[] args) throws SQLException
    {
        Connection cc=TestMysqlConnection.getConnection();

        if(!cc.isClosed())
            System.out.println("Succeeded connecting to the Database!");
        else
            System.out.println("Error connecting to the Database!");
    }
}

需要使用依賴com.mysql.jdbc.Driver mysql-jdbc.jar
打包方法

然後執行

> java -jar TestTools.jar
driver:com.mysql.jdbc.Driver
url:jdbc:mysql://localhost:3306/test
name:root
pwd:root
Succeeded connecting to the Database!