连接Java到MySQL数据库

如何在Java中连接MySQL数据库?

当我尝试时，我得到

java.sql.SQLException: No suitable driver found for jdbc:mysql://database/table
    at java.sql.DriverManager.getConnection(DriverManager.java:689)
    at java.sql.DriverManager.getConnection(DriverManager.java:247)

java.lang.ClassNotFoundException: com.mysql.jdbc.Driver

java.lang.ClassNotFoundException: com.mysql.cj.jdbc.Driver

当前回答

我之前用过连接，它看起来是最简单的方法，但也有建议在if语句中使用

Connection con = DriverManager.getConnection(
                     "jdbc:myDriver:DatabaseName",
                     dBuserName,
                     dBuserPassword);
if (con != null){
 //..handle your code there 
}

或者类似的方式:)

可能在某些情况下，getConnection可以返回null:)

2015-05-28 09:50:13

其他回答

下载JDBC驱动程序

下载链接(选择平台独立):https://dev.mysql.com/downloads/connector/j/

将JDBC驱动程序移动到C驱动器

解压文件并移动到C:\驱动器。你的驱动程序路径应该是C:\mysql-connector-java-8.0.19\mysql-connector-java-8.0.19

运行Java

java -cp "C:\mysql-connector-java-8.0.19\mysql-connector-java-8.0.19\mysql-connector-java-8.0.19.jar" testMySQL.java

testMySQL.java

import java.sql.*;
import java.io.*;

public class testMySQL {
    public static void main(String[] args) {
    // TODO Auto-generated method stub
        try
        {  
            Class.forName("com.mysql.cj.jdbc.Driver");  
            Connection con=DriverManager.getConnection(  
                "jdbc:mysql://localhost:3306/db?useSSL=false&useUnicode=true&useJDBCCompliantTimezoneShift=true&useLegacyDatetimeCode=false&serverTimezone=UTC","root","");  
            Statement stmt=con.createStatement();  
            ResultSet rs=stmt.executeQuery("show databases;");  
            System.out.println("Connected");  
        }
        catch(Exception e)
        {
            System.out.println(e);
        }

    }  

}

2020-02-22 11:29:16

String url = "jdbc:mysql://127.0.0.1:3306/yourdatabase";
String user = "username";
String password = "password";

// Load the Connector/J driver
Class.forName("com.mysql.jdbc.Driver").newInstance();
// Establish connection to MySQL
Connection conn = DriverManager.getConnection(url, user, password);

2010-05-15 07:43:10

以下是从MySQL数据库中获取数据的最低要求:

Class.forName("com.mysql.jdbc.Driver").newInstance();
Connection conn = DriverManager.getConnection
   ("jdbc:mysql://localhost:3306/foo", "root", "password");

Statement stmt = conn.createStatement();
stmt.execute("SELECT * FROM `FOO.BAR`");
stmt.close();
conn.close();

添加异常处理、配置等。

2010-05-15 07:48:24

MySql JDBC连接:

Class.forName("com.mysql.jdbc.Driver");     

Connection con=DriverManager.getConnection("jdbc:mysql://localhost:3306/DatabaseName","Username","Password");         
Statement stmt=con.createStatement();            
stmt = con.createStatement();
ResultSet rs=stmt.executeQuery("Select * from Table");

2017-01-09 17:13:16

短代码

public class DB {

    public static Connection c;

    public static Connection getConnection() throws Exception {
        if (c == null) {
            Class.forName("com.mysql.jdbc.Driver");
            c =DriverManager.getConnection("jdbc:mysql://localhost:3306/DATABASE", "USERNAME", "Password");
        }
        return c;
    }

    // Send data TO Database
    public static void setData(String sql) throws Exception {
        DB.getConnection().createStatement().executeUpdate(sql);
    }

    // Get Data From Database
    public static ResultSet getData(String sql) throws Exception {
        ResultSet rs = DB.getConnection().createStatement().executeQuery(sql);
        return rs;
    }
}

2017-09-17 10:01:43

连接Java到MySQL数据库

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