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

问题描述

如何连接到 Java 中的 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)

或者

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.更好的方法是获取 DataSource，或者通过查找您的应用服务器容器已经为您配置的:

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");

或直接从您的数据库驱动程序实例化和配置一个:

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，同上:

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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