java.lang.ClassNotFoundException:org.apache.derby.jdbc.ClientDriver [英] java.lang.ClassNotFoundException: org.apache.derby.jdbc.ClientDriver

问题描述

我是这个网站的新手.

我在连接到我创建的Java DB时遇到了麻烦.我使用了以下代码，但给出了

I've been having trouble connecting to my Java DB I have created. I've used the following code but given

java.lang.ClassNotFoundException:org.apache.derby.jdbc.ClientDriver

java.lang.ClassNotFoundException: org.apache.derby.jdbc.ClientDriver

作为错误.

String url = "jdbc:derby://localhost:1527/db;create=true;user=Administrator";

String driver = "org.apache.derby.jdbc.ClientDriver";

// login and connection details above
try {
    Class.forName("org.apache.derby.jdbc.ClientDriver").newInstance();
    conn = DriverManager.getConnection(url);
    Statement s = conn.createStatement();

    System.out.println("connected!");
} catch (ClassNotFoundException | SQLException e) {
    JOptionPane.showMessageDialog(null, "error in dbConnection " + e);
    System.out.println(e.toString());
} catch (Exception e) {
    JOptionPane.showMessageDialog(null, "Error in DBconnection , consult developers!");
}

我尝试过许多论坛和供稿，但给出的建议似乎都无效.

I've tried going through many forums and feeds and none of the advice given seems to work.

推荐答案

您缺少 JAR ，其中包含类 org.apache.derby.jdbc.ClientDriver 这是 derbyclient.jar

You're missing the JAR which contains the class org.apache.derby.jdbc.ClientDriver which is derbyclient.jar

您可以从或者，如果您使用Maven进行构建，则可以将以下内容添加到您的 pom.xml

Or, If you're using maven for building, you can add the following to your pom.xml

<dependency>
    <groupId>org.apache.derby</groupId>
    <artifactId>derbyclient</artifactId>
    <version>10.14.1.0</version>
</dependency>

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