Java 未找到适合jdbc的驱动程序：mysql://localhost/
我正在尝试将我的代码从linux移植到MacOSX LION。以下方法在linux上运行良好Java 未找到适合jdbc的驱动程序：mysql://localhost/,java,mysql,jdbc,osx-lion,Java,Mysql,Jdbc,Osx Lion,我正在尝试将我的代码从linux移植到MacOSX LION。以下方法在linux上运行良好 Connection getConnection() throws SQLException{ String url = "jdbc:mysql://localhost/"; return DriverManager.getConnection(url, "root", "mypassword"); } 但它在我的mac电脑上不起作用。我使用的是XAMMP，所以数据库的路径是/Appl
Connection getConnection() throws SQLException{
String url = "jdbc:mysql://localhost/";
return DriverManager.getConnection(url, "root", "mypassword");
}
/Applications/XAMPP/xamppfiles/bin/mysqlException in thread "main" java.sql.SQLException:
No suitable driver found for jdbc:mysql://localhost/
at java.sql.DriverManager.getConnection(DriverManager.java:602)
at java.sql.DriverManager.getConnection(DriverManager.java:185)
Class.forName（“com.mysql.jdbc.Driver”）Exception in thread "main" com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure
The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:411)
at com.mysql.jdbc.SQLError.createCommunicationsException(SQLError.java:1117)
at com.mysql.jdbc.MysqlIO.<init>(MysqlIO.java:350)
at com.mysql.jdbc.ConnectionImpl.coreConnect(ConnectionImpl.java:2408)
at com.mysql.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:2445)
at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2230)
at com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:813)
at com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:47)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:411)
at com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:399)
at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:334)
at java.sql.DriverManager.getConnection(DriverManager.java:582)
at java.sql.DriverManager.getConnection(DriverManager.java:185)
at learning.database.Classroom.getConnection(Classroom.java:42)
at learning.database.Classroom.main(Classroom.java:239)
Caused by: java.net.ConnectException: Connection refused
at java.net.PlainSocketImpl.socketConnect(Native Method)
at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:351)
at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:213)
at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:200)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:432)
at java.net.Socket.connect(Socket.java:529)
at java.net.Socket.connect(Socket.java:478)
at java.net.Socket.<init>(Socket.java:375)
at java.net.Socket.<init>(Socket.java:218)
at com.mysql.jdbc.StandardSocketFactory.connect(StandardSocketFactory.java:259)
at com.mysql.jdbc.MysqlIO.<init>(MysqlIO.java:300)
... 16 more
Java Result: 1
BUILD SUCCESSFUL (total time: 0 seconds)
您需要在mac的类路径上安装mysql jdbc连接器jar。JAVA JDK没有特定的SQL驱动程序（即mysql、postgre、MS SQL等）。您需要分别下载和安装它们。以下是java mysql连接器的下载链接：
它说将驱动程序放在类路径中，但也可以将其放在IDE的构建路径中，这可能会更容易，具体取决于您所做的操作。确保mysql jdbc连接器位于类路径中。您可能还需要加载驱动程序，在尝试获取连接之前添加以下行：
Class.forName("com.mysql.jdbc.Driver");
您需要告诉JVM加载驱动程序。它是这样的：Class.forName（“com.mysql.jdbc.Driver”）；另一个问题可能是其中的一部分，我不知道。在linux上，转到localhost/phpmyadmin不需要密码（有一个密码可以进入mysql视图）。但是，在mac上，我必须输入xampp的密码，然后输入一个密码才能登录。我已经更新了帖子，在添加驱动程序后显示了新错误。好吧，新错误并不完全是坏消息。这确实意味着驱动程序加载正确，您的项目可以看到数据库。您现在遇到的错误（java.net.ConnectException:连接被拒绝）是由SQL server拒绝您的凭据引起的。假设此代码在linux机器上正常工作，则错误存在于代码之外。检查用户表并确保您的凭据正确。您可以做一件事（尽管从长远来看这会造成一个安全漏洞，但就是给您的用户以“%”的完全权限（“root”@“%”允许root用户从任何地方登录）我的知识并不是那么先进。我如何实现
'root'@'%