org.gjt.mm.mysql.Driver是com.mysql.jdbc.Driver的前身，如果你的项目中用到的是org.gjt.mm.mysql.Driver驱动，只是为了兼容性。和用com.mysql.jdbc.Driver没区别。
但是现在的项目建议使用com.mysql.jdbc.Driver。下面是测试代码：
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package com.evan.jdbc.test;
import java.sql.Connection;
importjava.sql.DriverManager;
importjava.sql.PreparedStatement;
import java.sql.ResultSet;
public class JDBCdRIVERtEST {
public static void main(String[] args) throws Exception{
Connection conn = null;
PreparedStatement ps = null;
ResultSet rs = null;
String url = "jdbc:mysql://localhost:3306/evan";
String username = "root";
String password = "root";
String sql = "select * from user";
//String className = "org.gjt.mm.mysql.Driver";
String className = "com.mysql.jdbc.Driver";
Class.forName(className);
conn = DriverManager.getConnection(url,username, password);
ps =conn.prepareStatement(sql);
rs = ps.executeQuery();
while (rs.next()) {
System.out.println("user表里面有值" + rs.getString("name"));
}
}
}
