Javafxports和SQLite->打开失败:EPERM(不允许操作) [英] Javafxports and SQLite -> open failed: EPERM (Operation not permitted)

查看:132
本文介绍了Javafxports和SQLite->打开失败:EPERM(不允许操作)的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

我正在尝试使用javafxports编写简单的sqlite代码.

i m trying to code a simple sqlite code with javafxports.

build.gradle:

    buildscript {
    repositories {
        jcenter()
    }
    dependencies {
        classpath 'org.javafxports:jfxmobile-plugin:1.0.6'
    }
}

apply plugin: 'org.javafxports.jfxmobile'

repositories {
    jcenter()
    maven {
        url "https://oss.sonatype.org/content/repositories/snapshots/"
    }
    maven {
        url "https://oss.sonatype.org/content/repositories/releases"
    }

}

ext.CHARM_DOWN_VERSION = "1.0.0"

dependencies{
    compile 'org.xerial:sqlite-jdbc:3.8.11'

    compile "com.gluonhq:charm-down-common:$CHARM_DOWN_VERSION"
    desktopRuntime "com.gluonhq:charm-down-desktop:$CHARM_DOWN_VERSION"
    androidRuntime "com.gluonhq:charm-down-android:$CHARM_DOWN_VERSION"
    iosRuntime "com.gluonhq:charm-down-ios:$CHARM_DOWN_VERSION"
}
mainClassName = 'com.gluonapplication.version16'

jfxmobile {
    android {
        manifest = 'src/android/AndroidManifest.xml'
    }
    ios {
        infoPList = file('src/ios/Default-Info.plist')
        forceLinkClasses= ['com.gluonhq.**.*', 'org.sqlite.**.*']
    }
}

我的Java代码:

public static Label msg = new Label();

@Override
public void start(Stage stage) {
    StackPane root = new StackPane();

    root.getChildren().add(msg);
    Rectangle2D visualBounds = Screen.getPrimary().getVisualBounds();
    Scene scene = new Scene(root, visualBounds.getWidth(), visualBounds.getHeight());

    stage.getIcons().add(new Image(version16.class.getResourceAsStream("/icon.png")));
    stage.setScene(scene);
    stage.show();

    try {
        testSqli();
    } catch (SQLException e) {
        e.printStackTrace();
    } catch (ClassNotFoundException e) {
        e.printStackTrace();
    }
}
public static void testSqli() throws SQLException, ClassNotFoundException {
    String driver = "org.sqlite.JDBC";
    //Class.forName("SQLite.JDBCDriver");
    Class.forName(driver);
    String dbName = "mtt8.db";
    String dbUrl = "jdbc:sqlite:" + dbName;

    //create table
    Statement st = null;
    Connection conn = DriverManager.getConnection(dbUrl);
    st = conn.createStatement();
    st.executeUpdate("DROP TABLE IF EXISTS village;");
    st.executeUpdate("CREATE table village (id int, name varchar(20))");
    //insert row?
    st.executeUpdate("INSERT INTO village VALUES (111, 'Concretepage')");

    //select?
    String query = "SELECT id, name from village";
    ResultSet rs = null;
    rs = st.executeQuery(query);

    while (rs.next()) {
        int id = 0;
        id = rs.getInt(1);
        String name = null;
        name = rs.getString(2);
        msg.setText("id:" + id + ", name: " + name);
        System.out.println("id:" + id + ", name: " + name);
        st.executeUpdate("DELETE from village");
        rs.close();
    }
}

然后我用发送它./gradlewlaunchIOSDevice 并收到以下错误消息:

and i send it with ./gradlew launchIOSDevice and get following error:

java.sql.SQLException: opening db: 'mtt8.db': open failed: EPERM (Operation not permitted)
    at org.sqlite.core.CoreConnection.open(CoreConnection.java:203)
    at org.sqlite.core.CoreConnection.<init>(CoreConnection.java:76)
    at org.sqlite.jdbc3.JDBC3Connection.<init>(JDBC3Connection.java:24)
    at org.sqlite.jdbc4.JDBC4Connection.<init>(JDBC4Connection.java:23)
    at org.sqlite.SQLiteConnection.<init>(SQLiteConnection.java:45)
    at org.sqlite.JDBC.createConnection(JDBC.java:114)
    at org.sqlite.JDBC.connect(JDBC.java:88)
    at java.sql.DriverManager.getConnection(DriverManager.java:179)
    at java.sql.DriverManager.getConnection(DriverManager.java:144)
    at com.gluonapplication.version16.testSqli(version16.java:48)
    at com.gluonapplication.version16.start(version16.java:32)
    at com.sun.javafx.application.LauncherImpl.lambda$launchApplication1$162(LauncherImpl.java:863)
    at com.sun.javafx.application.LauncherImpl$$Lambda$81.run(Unknown Source)
    at com.sun.javafx.application.PlatformImpl.lambda$runAndWait$175(PlatformImpl.java:326)
    at com.sun.javafx.application.PlatformImpl$$Lambda$93.run(Unknown Source)
    at com.sun.javafx.application.PlatformImpl.lambda$null$173(PlatformImpl.java:295)
    at com.sun.javafx.application.PlatformImpl$$Lambda$105.run(Unknown Source)
    at java.security.AccessController.doPrivileged(AccessController.java:52)
    at com.sun.javafx.application.PlatformImpl.lambda$runLater$174(PlatformImpl.java:294)
    at com.sun.javafx.application.PlatformImpl$$Lambda$92.run(Unknown Source)
    at org.robovm.apple.uikit.UIApplication.main(Native Method)
    at org.robovm.apple.uikit.UIApplication.main(UIApplication.java:369)
    at org.javafxports.jfxmobile.ios.BasicLauncher.main(BasicLauncher.java:115)
IOSWindowSystemInterface : setSwapInterval unimp
setSwapInterval(1)

有人可以帮我吗, 我如何在代码中提供权限,以便创建sqlite数据库?

can anybody help me please, how can i give an acces in my code so that i can create a sqlite DB ?

谢谢 尔坎·卡普兰(Erkan Kaplan)

thanks erkan kaplan

推荐答案

@ItachiUchiha指出,您的问题与您试图创建数据库的位置有关:

As @ItachiUchiha points out, your issue is related to the place where you are trying to create the database:

String dbUrl = "jdbc:sqlite:" + dbName;
Connection conn = DriverManager.getConnection(dbUrl);

您提供的URL可能在台式机上可用,但不能在移动设备上使用,因为该应用对存储的访问非常受限,并且仅授予对本地本地存储的访问权限.

The URL you are providing may work on your desktop, but not on a mobile device, where the app has a very restricted access to the storage, and it has granted access only to a private local storage.

使用Gluon的开源库降级,很容易获得本地存储的路径,而不管应用程序运行在什么平台上.

Using the Gluon's open source library Charm-Down, it's very easy to get the path of that local storage, regardless the platform the app is running on.

首先,将以下依赖项添加到您的build.gradle脚本中:

First, add these dependencies to your build.gradle script:

ext.CHARM_DOWN_VERSION = "1.0.0"
dependencies {
    compile "com.gluonhq:charm-down-common:$CHARM_DOWN_VERSION"
    desktopRuntime "com.gluonhq:charm-down-desktop:$CHARM_DOWN_VERSION"
    androidRuntime "com.gluonhq:charm-down-android:$CHARM_DOWN_VERSION"
    iosRuntime "com.gluonhq:charm-down-ios:$CHARM_DOWN_VERSION"
}

现在,在您的代码上,URL应该是:

And now, on your code, the URL should be:

try {
    File dir = PlatformFactory.getPlatform().getPrivateStorage();
    File db = new File (dir, dbName);
    String dbUrl = "jdbc:sqlite:" + db.getAbsolutePath();
    Connection conn = DriverManager.getConnection(dbUrl);
    ...
} catch (Exception e) { }

这篇关于Javafxports和SQLite-&gt;打开失败:EPERM(不允许操作)的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!

查看全文
登录 关闭
扫码关注1秒登录
发送“验证码”获取 | 15天全站免登陆