SQLException: No suitable driver found for jdbc:mysql

1. Java併發：徹底理解ThreadLocal）中的連線Mysql示例

1.1 獲取mysql連線

public class ConnectionManager {

    private static ThreadLocal<Connection> connectionHolder = ThreadLocal.withInitial(() -> {
        Connection conn = null;
        try {
            conn = DriverManager.getConnection(
                    "jdbc:mysql://localhost:3306/test", "root",
                    "123");
        } catch (SQLException e) {
            e.printStackTrace();
        }
        return conn;
    });

    public static Connection getConnection() {
        return connectionHolder.get();
    }
}
 

1.2 測試

 public static void main(String[] args) throws SQLException {
        Connection conn = ConnectionManager.getConnection();
        Statement stmt = conn.createStatement();
        java.sql.ResultSet rs = stmt.executeQuery("select  * from user");
        while(rs.next()){
           System.out.println(rs.getObject(1));
        }

    }
 

1.3. 異常

java.sql.SQLException: No suitable driver found for jdbc:mysql://localhost:3306/test
	at java.sql.DriverManager.getConnection(DriverManager.java:689)
	at java.sql.DriverManager.getConnection(DriverManager.java:247)

1.4 解決

1.4.1 檢查連線URL格式是否正確

1.4.2 檢查驅動字串

1.4.3 檢查Classpath中是否加入mysql_jdbc驅動

1.4.4 將mysql-connector-java-XXX.jar放入%JAVA-HOME%下的jre\lib\ext下解決

2. The server time zone value 'Öйú±ê׼ʱ¼ä' is unrecognized

url後面增加：?useUnicode=true&characterEncoding=UTF-8&useSSL=false&autoReconnect=true&failOverReadOnly=false&serverTimezone=GMT
其實只需要serverTimezone=G