技術標籤：mysqljdbc

java連線mysql資料庫失敗

Loading class `com.mysql.jdbc.Driver’.

這個意思是‘com.mysql.jdbc.Driver’已經過時
jdk9以上應修改以下程式碼
解決方案：
①：應該改為‘com.mysql.cj.jdbc.Driver’；

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

②：將原來的jdbc連線資料庫名後面新增‘?serverTimezone"+
"=UTC&characterEncoding=utf-8&useSSL=false’語句

具體程式碼如下:

Connection conn = DriverManager.getConnection("jdbc:mysql://localhost:3306/user?serverTimezone"+"=UTC&characterEncoding=utf-8&useSSL=false","root","admin");

連線資料庫具體程式碼:

package demo;

import java.sql.Connection;
import java.sql.DriverManager;
import
 
 java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;

public class jdbc {
	public static void main(String[] args) {
		try {
			//載入驅動
			Class.forName("com.mysql.cj.jdbc.Driver");
			//連線資料庫
			Connection conn = DriverManager.getConnection("jdbc:mysql://localhost:3306/user?serverTimezone"
 
+
                    "=UTC&characterEncoding=utf-8&useSSL=false","root","admin");
			//執行SQl語句
			Statement sta = conn.createStatement();
			int a = sta.executeUpdate("insert into s(gdcode,gdprice) values (13,98)");
			
			if(a>0) {
				System.out.println("建立成功");
			}
		} catch (ClassNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}

}