摘要：
package Student; import java.sql.Connection;import java.sql.DriverManager; public class DBUtil { public static String db_url = "jdbc:mysql://localhost 阅读全文
摘要：
连接数据库 DBUtil.java package Student; import java.sql.Connection;import java.sql.DriverManager; public class DBUtil { public static String db_url = "jdbc 阅读全文