ClassNotFoundException: com.mysql.jdbc.Driver

protected static Connection getConnection() throws SQLException
    {    
     try
     {
      Class.forName("com.mysql.jdbc.Driver");
     }
     catch (ClassNotFoundException e)
     {
      e.printStackTrace();
     }
   
     Connection conn = DriverManager.getConnection(
             "jdbc:mysql://localhost/DB", "root", "root");
     return conn;
    }

连接mysql数据失败：java.lang.ClassNotFoundException: com.mysql.jdbc.Driver

原因：未引入数据库连接包mysql-connector-java-3.1.12-bin.jar

解决步骤：右键工程->properties->Java Build Path->Libraries->选择Add External Jars