将Java连接到MySQL数据库 [英] Connect Java to a MySQL database

问题描述

如何用Java连接到MySQL数据库？

How do you connect to a MySQL database in Java?

当我尝试时，我得到

java.sql.SQLException: No suitable driver found for jdbc:mysql://database/table
    at java.sql.DriverManager.getConnection(DriverManager.java:689)
    at java.sql.DriverManager.getConnection(DriverManager.java:247)

或

java.lang.ClassNotFoundException: com.mysql.jdbc.Driver

或

java.lang.ClassNotFoundException: com.mysql.cj.jdbc.Driver

推荐答案

DriverManager 是一种相当古老的做事方式。更好的方法是获得一个 DataSource ，或者查看你的app服务器容器已经为你配置了一个：

DriverManager is a fairly old way of doing things. The better way is to get a DataSource, either by looking one up that your app server container already configured for you:

Context context = new InitialContext();
DataSource dataSource = (DataSource) context.lookup("java:comp/env/jdbc/myDB");

或直接从数据库驱动程序中实例化和配置一个：

or instantiating and configuring one from your database driver directly:

MysqlDataSource dataSource = new MysqlDataSource();
dataSource.setUser("scott");
dataSource.setPassword("tiger");
dataSource.setServerName("myDBHost.example.org");

然后从中获取连接，与上面相同：

and then obtain connections from it, same as above:

Connection conn = dataSource.getConnection();
Statement stmt = conn.createStatement();
ResultSet rs = stmt.executeQuery("SELECT ID FROM USERS");
...
rs.close();
stmt.close();
conn.close();

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