找不到适合jdbc mysql的驱动程序?

我正在尝试编写一个程序以在eclipse中连接到MySQL数据库,但出现错误 “ java.sql.SQLException:找不到合适的驱动程序”

Java代码是:

import java.sql.*;

public class FirstExample {

//static final String S_JDBC_DRIVER = "com.mysql.jdbc.Driver";

static final String S_DB_URL = "jdbc:mysql://localhost:3306/emp";

static final String S_USER = "root";

static final String S_PASS = "root";

public static void main(String[] args) {

try {

System.out.println("Connecting to database...");

//Class.forName(S_JDBC_DRIVER);

Connection connection = DriverManager.getConnection(S_DB_URL,

S_USER, S_PASS);

System.out.println("Creating statement...");

Statement statement = connection.createStatement();

String sql = "SELECT * FROM Employee";

ResultSet resultSet = statement.executeQuery(sql);

while (resultSet.next()) {

int iId = resultSet.getInt("id");

int iAge = resultSet.getInt("age");

String sFirst = resultSet.getString("fname");

String sLast = resultSet.getString("lname");

System.out.print("ID: " + iId);

System.out.print("\tAge: " + iAge);

System.out.print("\tFirst: " + sFirst);

System.out.println("\tLast: " + sLast);

}

resultSet.close();

statement.close();

connection.close();

} catch (SQLException se) {

for (Throwable t : se) {

t.printStackTrace();

}

}

System.out.println("Goodbye!");

}

}

控制台选项卡中的输出为:

Connecting to database...

java.sql.SQLException: No suitable driver found for jdbc:mysql://localhost:3306/emp

at java.sql.DriverManager.getConnection(Unknown Source)

at java.sql.DriverManager.getConnection(Unknown Source)

at FirstExample.main(FirstExample.java:21)

Goodbye!

我已经使用了MySQL Connector / J。将其解压缩到MySQL安装目录中,并将jar文件添加到CLASSPATH中。

另请参阅此图像。有一个

!在项目根目录上标记。image01

当我包含2条注释语句时,出现下图所示的错误:image02:

static final String S_JDBC_DRIVER = "com.mysql.jdbc.Driver";

Class.forName(S_JDBC_DRIVER);

回答:

除了最琐碎的应用程序之外,所有其他应用程序CLASSPATH都 使用环境变量。通常,这些库包含在Class-

Pathjar清单的条目中,或者-cp包含在Java命令行的选项中。

在这种情况下,您需要将MySQL JDBC驱动程序添加到Eclipse项目的buildpath中。

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