無法使用jdbc遠程連接到OpenShift MySQL

Question

我正在嘗試使用jdbc連接到openshift上的遠程數據庫。 這是我的以下代碼-

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

public class Conn {
    public static String url        = "jdbc:mysql://127.9.77.2:3306/mysql";
    public static String user   = "adminSKr7Tbz";
    public static String password = "h1xha****";

    public static void main(String[] args) throws ClassNotFoundException, SQLException {
        // TODO Auto-generated method stub
        Class.forName("com.mysql.jdbc.Driver");
        Connection conn = DriverManager.getConnection(url,user,password);
        System.out.println("Connecting to database...");
        Statement stmt = conn.createStatement();
        ResultSet rs = stmt.executeQuery("select * from country LIMIT 10;");
        while (rs.next()) {
            HashMap map =  new HashMap();
            String name = rs.getString("Name");
            Integer col       = Integer.parseInt(rs.getString("Area"));
            map.put("name",name);
            map.put("value",col);
            System.out.println(map);

        }
    }
}

我收到以下錯誤-

Exception in thread "main" java.sql.SQLException: Access denied for user 'adminSKr7Tbz'@'localhost' (using password: YES)
    at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1056)
    at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:957)
    at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3376)
    at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3308)
    at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:894)
    at com.mysql.jdbc.MysqlIO.secureAuth411(MysqlIO.java:3808)
    at com.mysql.jdbc.MysqlIO.doHandshake(MysqlIO.java:1256)
    at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2032)
    at com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:729)
    at com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:46)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
    at java.lang.reflect.Constructor.newInstance(Constructor.java:526)
    at com.mysql.jdbc.Util.handleNewInstance(Util.java:406)
    at com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:302)
    at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:283)
    at java.sql.DriverManager.getConnection(DriverManager.java:571)
    at java.sql.DriverManager.getConnection(DriverManager.java:215)
    at visualize.Conn.main(Conn.java:18)

誰能幫我解決這個問題。 我正確地提供了所有憑據，即使它說“訪問被拒絕”。

Answer 1

MySQL可能僅設置為接受本地主機上的連接。 您可以更新授權聲明以使用“ user @％”

Answer 2

String USERNAME = System.getEnv("OPENSHIFT_MYSQL_DB_USERNAME");
String PASSWORD = System.getEnv("OPENSHIFT_MYSQL_DB_PASSWORD");
String DB_NAME = System.getEnv("OPENSHIFT_APP_NAME");
String FORNAME_URL = "com.mysql.jdbc.Driver";
String URL = "jdbc:"+System.getEnv("OPENSHIFT_MYSQL_DB_URL")+ DB_NAME;
Connection m_connection = DriverManager.getConnection(URL , USERNAME , PASSWORD);

這樣使用它.Openshift將不會在靜態IP上進行中繼，因此它們將不會通過該IP或本地主機接受您的連接。 另外，如果您在本地服務器上嘗試使用它，而不是在openshift上部署它，則必須使用ssh令牌進行連接，我認為這是不允許的。