如題，在/java_jdbc/lib/mysql-connector-java-5.1.38-bin.jar這個包沒有java.sql.*,這個包是在jdk中。

Class.forName("com.mysql.jdbc.Driver");這句加載的又是com.mysql.*里面的。

這兩個具體的關系是怎樣的？

代碼如下：

package com.db;

import java.sql.Connection;

import java.sql.DriverManager;

import java.sql.ResultSet;

import java.sql.SQLException;

import java.sql.Statement;

public class DBUtil {

public static void main(String[] args) {

try {

Class.forName("com.mysql.jdbc.Driver");

Connection conn = DriverManager.getConnection("jdbc:mysql://127.0.0.1:3306/goodness?useSSL=false","root","1234");

Statement st = ?conn.createStatement();

ResultSet rs = st.executeQuery("select * from goodness_table");

while(rs.next()){

System.out.println(rs.getShort("id")+" " +rs.getString("name")+" "+rs.getString("tel")+" "+rs.getString("email"));

}

} catch (ClassNotFoundException e) {

e.printStackTrace();

} catch (SQLException e) {

e.printStackTrace();

}

}

}