android - 如何在javafx应用程序中连接godaddy mysql

Question

我在 javafx 桌面/Android 应用程序中连接 GoDaddy MySQL 连接时遇到问题。我想直接连接到位于 GoDaddy 的 MySQL，而不使用 ssh 技术。

这是我的 Main.java 文件:

package com.maqboolsolutions.mysql_ssh_android;

import java.io.IOException;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.util.logging.Level;
import java.util.logging.Logger;
import javafx.application.Application;
import javafx.stage.Stage;

public class Main extends Application {

    String HOST = ""; // Hosting provider ip address / name (e.g. example.com)
    String DB_NAME = ""; // Database name (e.g. db_test)

    String DB_URL = "jdbc:mysql://" + HOST + ":3306/" + DB_NAME;

    String USERNAME = ""; // mysql database user name (e.g. admin)
    String PASSWORD = ""; // mysql database password (e.g. 123)

    @Override
    public void start(Stage primaryStage) throws IOException {
        getConnection();
    }

    private void getConnection() {
        try {
            //mysql database connectivity
            Class.forName("com.mysql.cj.jdbc.Driver");

            Connection con = DriverManager.getConnection(DB_URL, USERNAME, PASSWORD);

            System.out.println("Database connection established");
            System.out.println("DONE");

        } catch (ClassNotFoundException | SQLException ex) {
            Logger.getLogger(DBConnection.class.getName()).log(Level.SEVERE, null, ex);
            System.exit(0);
        }
    }

    public static void main(String[] args) {
        launch(args);
    }
}

这是 gradle.build:

buildscript {
    repositories {
        jcenter()
    }
    dependencies {
        classpath 'org.javafxports:jfxmobile-plugin:1.3.16'
    }
}

apply plugin: 'org.javafxports.jfxmobile'

repositories {
    jcenter()
    maven {
        url 'http://nexus.gluonhq.com/nexus/content/repositories/releases'
    }
}

mainClassName = 'com.maqboolsolutions.mysql_ssh_android.Main'

dependencies {
    compile 'com.gluonhq:charm:5.0.2'

    compile 'mysql:mysql-connector-java:8.0.13'
    compile 'com.jcraft:jsch:0.1.54'
}

jfxmobile {
    downConfig {
        version = '3.8.6'
        // Do not edit the line below. Use Gluon Mobile Settings in your project context menu instead
        plugins 
    }

    android {
        manifest = 'src/android/AndroidManifest.xml'

        javafxportsVersion = '8.60.11'

        android {
            manifest = 'src/android/AndroidManifest.xml'

            packagingOptions {
                exclude 'META-INF/INDEX.LIST'
            }

            dexOptions {
                javaMaxHeapSize "4g"
            }
        }
    }
}

这是错误/堆栈跟踪:

Executing: gradle :mysql_ssh_androidApp:run
Arguments: [-PcmdLineArgs=, -PjvmLineArgs=, -c, C:\Users\MaqboolSoftPC\Documents\NetBeansProjects\mysql-ssh-android\mysql_ssh_android\settings.gradle]

:mysql_ssh_androidApp:compileJava
:mysql_ssh_androidApp:processResources UP-TO-DATE
:mysql_ssh_androidApp:classes
:mysql_ssh_androidApp:compileDesktopJava NO-SOURCE
:mysql_ssh_androidApp:processDesktopResources NO-SOURCE
:mysql_ssh_androidApp:desktopClasses UP-TO-DATE
Dec 08, 2018 10:46:19 AM com.maqboolsolutions.mysql_ssh_android.Main getConnection
SEVERE: null
java.sql.SQLException: Access denied for user 'admin'@'example.com' (using password: YES)
    at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:129)
    at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:97)
    at com.mysql.cj.jdbc.exceptions.SQLExceptionsMapping.translateException(SQLExceptionsMapping.java:122)
    at com.mysql.cj.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:835)
    at com.mysql.cj.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:455)
    at com.mysql.cj.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:240)
    at com.mysql.cj.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:207)
    at java.sql.DriverManager.getConnection(DriverManager.java:664)
    at java.sql.DriverManager.getConnection(DriverManager.java:247)
    at com.maqboolsolutions.mysql_ssh_android.Main.getConnection(Main.java:39)
    at com.maqboolsolutions.mysql_ssh_android.Main.start(Main.java:31)
    at com.sun.javafx.application.LauncherImpl.lambda$launchApplication1$161(LauncherImpl.java:863)
    at com.sun.javafx.application.PlatformImpl.lambda$runAndWait$174(PlatformImpl.java:326)
    at com.sun.javafx.application.PlatformImpl.lambda$null$172(PlatformImpl.java:295)
    at java.security.AccessController.doPrivileged(Native Method)
    at com.sun.javafx.application.PlatformImpl.lambda$runLater$173(PlatformImpl.java:294)
    at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:95)
    at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
    at com.sun.glass.ui.win.WinApplication.lambda$null$147(WinApplication.java:177)
    at java.lang.Thread.run(Thread.java:748)

:mysql_ssh_androidApp:run

BUILD SUCCESSFUL in 4s
3 actionable tasks: 2 executed, 1 up-to-date

我已经在 godaddy Remote MySQL 中添加了我的 IP 地址，如图所示。

如果我使用 ssh 技术，那么它可以在桌面上运行，而不是在 Android 设备上运行。看我的帖子Javafx android mysql connect over ssh .

Answer 1

不，您不想直接连接到 mysql。不是来自安卓。为此，您需要将数据库的密码放入应用程序中，这意味着您的数据库将受到威胁。正确的方法是设置一个 Web 服务，并仅从该 Web 服务访问数据库。然后 Android 应用程序将调用 Web 服务。

相同的规则适用于桌面应用程序。直接连接到数据库的唯一应用程序应该是在您自己的服务器上运行的应用程序。