Question

NetBeans连接mysql出错，但在服务的数据库连接下可以

java.lang.ClassNotFoundException: com.mysql.jdbc.Driver
at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
at java.lang.ClassLoader.loadClass(ClassLoader.java:423)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
at java.lang.ClassLoader.loadClass(ClassLoader.java:356)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:186)
at textinsert.TextInsert.main(TextInsert.java:12)
java.lang.NullPointerException
at textinsert.TextInsert.main(TextInsert.java:24)
成功生成（总时间：1 秒）





Answer 1

java.lang.ClassNotFoundException: com.mysql.jdbc.Driver
是没找导入驱动包：mysql-connector-java.jar

Answer 2

连接语句
Class.forName("com.mysql.jdbc.Driver");

String url = "jdbc:mysql://localhost:3306/test?user=root&password=mysql";

conn = DriverManager.getConnection(url);

现错误：

java.sql.SQLException: Access denied for user 'root'@'localhost' (using password: NO)

啊

追问

？？？ 你的密码不对