What is the MySQL JDBC driver connection string?

问题

I am new to JDBC and I am trying to make a connection to a MySQL database. I am using Connector/J driver, but I cant find the JDBC connection string for my Class.forName() method.

回答1:

Assuming your driver is in path,

String url = "jdbc:mysql://localhost/test";
Class.forName ("com.mysql.jdbc.Driver").newInstance ();
Connection conn = DriverManager.getConnection (url, "username", "password");

回答2:

Have you read the documentation?

https://dev.mysql.com/doc/connector-j/en/connector-j-reference-configuration-properties.html

A basic connection string looks like:

jdbc:mysql://localhost:3306/dbname

The class.forName string is "com.mysql.jdbc.Driver", which you can find (edit: now on the same page).

回答3:

"jdbc:mysql://localhost"

From the oracle docs..

jdbc:mysql://[host][,failoverhost...]
[:port]/[database]
[?propertyName1][=propertyValue1]
[&propertyName2][=propertyValue2]

host:port is the host name and port number of the computer hosting your database. If not specified, the default values of host and port are 127.0.0.1 and 3306, respectively.

database is the name of the database to connect to. If not specified, a connection is made with no default database.

failover is the name of a standby database (MySQL Connector/J supports failover).

propertyName=propertyValue represents an optional, ampersand-separated list of properties. These attributes enable you to instruct MySQL Connector/J to perform various tasks.

回答4:

It is very simple :

Go to MySQL workbench and lookup for Database > Manage Connections
you will see a list of connections. Click on the connection you wish to connect to.
You will see a tabs around connection, remote management, system profile. Click on connection tab.
your url is jdbc:mysql://<hostname>:<port>/<dbname>?prop1 etc. where <hostname> and <port> are given in the connection tab.It will mostly be localhost : 3306. <dbname> will be found under System Profile tab in Windows Service Name. Default will mostly be MySQL5<x> where x is the version number eg. 56 for MySQL5.6 and 55 for MySQL5.5 etc.You can specify ur own Windows Service name to connect too.
Construct the url accordingly and set the url to connect.

回答5:

For Mysql, the jdbc Driver connection string is com.mysql.jdbc.Driver. Use the following code to get connected:-

class DBConnection {
   private static Connection con = null;
   private static String USERNAME = "your_mysql_username";
   private static String PASSWORD = "your_mysql_password";
   private static String DRIVER = "com.mysql.jdbc.Driver";
   private static String URL = "jdbc:mysql://localhost:3306/database_name";

   public static Connection getDatabaseConnection(){
       Class.forName(DRIVER);
       return con = DriverManager.getConnection(URL,USERNAME,PASSWORD);
   }
}

回答6:

As the answer seems already been answered, there is not much to add but I would like to add one thing to the existing answers. This was the way of loading class for JDBC driver for mysql

com.mysql.jdbc.Driver

But this is deprecated now. The new driver class is now

com.mysql.cj.jdbc.Driver

Also the driver is automatically registered via the SPI and manual loading of the driver class is generally unnecessary.

回答7:

update for mySQL 8 :

String jdbcUrl="jdbc:mysql://localhost:3306/youdatabase?useSSL=false&serverTimezone=UTC";

回答8:

String url = "jdbc:mysql://localhost:3306/dbname";
String user = "user";
String pass = "pass";
Class.forName ("com.mysql.jdbc.Driver").newInstance ();
Connection conn = DriverManager.getConnection (url, user, pass);

3306 is the default port for mysql.

If you are using Java 7 then there is no need to even add the Class.forName("com.mysql.jdbc.Driver").newInstance (); statement.Automatic Resource Management (ARM) is added in JDBC 4.1 which comes by default in Java 7.

The general format for a JDBC URL for connecting to a MySQL server is as follows, with items in square brackets ([ ]) being optional:

jdbc:mysql://[host1][:port1][,[host2][:port2]]...[/[database]] »
[?propertyName1=propertyValue1[&propertyName2=propertyValue2]...]

回答9:

protocol//[hosts][/database][?properties]

If you don't have any properties ignore it then it will be like

jdbc:mysql://127.0.0.1:3306/test

jdbc:mysql is the protocol 127.0.0.1: is the host and 3306 is the port number test is the database

回答10:

it's depends on what service you're using.

if you use MySQL Workbench it wold be some thing like this :

jdbc:mysql://"host":"port number"/

String url = "jdbc:mysql://localhost:3306/";

And of course it will be different if you using SSL/SSH.

For more information follow the official link of Jetbriens (intelliJ idea) :

Connecting to a database #

https://www.jetbrains.com/help/idea/connecting-to-a-database.html

Configuring database connections #

https://www.jetbrains.com/help/idea/configuring-database-connections.html

来源：https://stackoverflow.com/questions/1457716/what-is-the-mysql-jdbc-driver-connection-string

标签

mysql

jdbc

connection-string