部署示例Java Web Start應用程序失敗。

Question

我剛剛開始制作Java Web Start應用程序。 我不斷收到以下異常，因此無法在本地正確部署它

我正在關注以下有關JWS的教程

a） 官方Java文檔

b） Java Web Start（Jnlp）Hello World示例

我做了以下步驟：

1。 將.class文件打包到可執行的jar中。

2。 在罐子上簽名

3。 創建了一個jnlp文件

4。 創建一個HTML文件

將jar，jnlp和html文件放在同一JWS目錄中，並稱為html文件。

JWS\

Demo.jar
NewFile.html
Test.jnlp

我的Test.jnlp文件是：

 <?xml version="1.0" encoding="utf-8"?>
    <jnlp spec="1.0+" codebase="http://localhost:8080/" href="Test.jnlp">
        <information>
            <title>Jnlp Testing</title>
            <vendor>SUM</vendor>
            <homepage href="http://localhost:8080/" />
            <description>Testing Testing</description>
        </information>
        <security>
            <all-permissions/>
        </security>
        <resources>
            <j2se version="1.6+" />
            <jar href="Demo.jar" />
        </resources>
        <application-desc main-class="com.mytest.TestJnlp" />
    </jnlp>

主要例外：

com.sun.deploy.net.FailedDownloadException: Unable to load resource: http://localhost:8080/Test.jnlp
    at com.sun.deploy.net.DownloadEngine.actionDownload(Unknown Source)
    at com.sun.deploy.net.DownloadEngine.downloadResource(Unknown Source)
    at com.sun.deploy.cache.ResourceProviderImpl.getResource(Unknown Source)
    at com.sun.deploy.cache.ResourceProviderImpl.getResource(Unknown Source)
    at com.sun.javaws.Launcher.updateFinalLaunchDesc(Unknown Source)
    at com.sun.javaws.Launcher.prepareToLaunch(Unknown Source)
    at com.sun.javaws.Launcher.prepareToLaunch(Unknown Source)
    at com.sun.javaws.Launcher.launch(Unknown Source)
    at com.sun.javaws.Main.launchApp(Unknown Source)
    at com.sun.javaws.Main.continueInSecureThread(Unknown Source)
    at com.sun.javaws.Main.access$000(Unknown Source)
    at com.sun.javaws.Main$1.run(Unknown Source)
    at java.lang.Thread.run(Unknown Source)

包裝的異常：

java.net.ConnectException: Connection refused: connect
    at java.net.DualStackPlainSocketImpl.connect0(Native Method)
    at java.net.DualStackPlainSocketImpl.socketConnect(Unknown Source)
    at java.net.AbstractPlainSocketImpl.doConnect(Unknown Source)
    at java.net.AbstractPlainSocketImpl.connectToAddress(Unknown Source)
    at java.net.AbstractPlainSocketImpl.connect(Unknown Source)
    at java.net.PlainSocketImpl.connect(Unknown Source)
    at java.net.SocksSocketImpl.connect(Unknown Source)
    at java.net.Socket.connect(Unknown Source)
    at java.net.Socket.connect(Unknown Source)
    at sun.net.NetworkClient.doConnect(Unknown Source)
    at sun.net.www.http.HttpClient.openServer(Unknown Source)
    at sun.net.www.http.HttpClient.openServer(Unknown Source)
    at sun.net.www.http.HttpClient.<init>(Unknown Source)
    at sun.net.www.http.HttpClient.New(Unknown Source)
    at sun.net.www.http.HttpClient.New(Unknown Source)
    at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(Unknown Source)
    at sun.net.www.protocol.http.HttpURLConnection.plainConnect(Unknown Source)
    at sun.net.www.protocol.http.HttpURLConnection.connect(Unknown Source)
    at com.sun.deploy.net.BasicHttpRequest.doRequest(Unknown Source)
    at com.sun.deploy.net.BasicHttpRequest.doRequest(Unknown Source)
    at com.sun.deploy.net.BasicHttpRequest.doGetRequest(Unknown Source)
    at com.sun.deploy.net.DownloadEngine.actionDownload(Unknown Source)
    at com.sun.deploy.net.DownloadEngine.downloadResource(Unknown Source)
    at com.sun.deploy.cache.ResourceProviderImpl.getResource(Unknown Source)
    at com.sun.deploy.cache.ResourceProviderImpl.getResource(Unknown Source)
    at com.sun.javaws.Launcher.updateFinalLaunchDesc(Unknown Source)
    at com.sun.javaws.Launcher.prepareToLaunch(Unknown Source)
    at com.sun.javaws.Launcher.prepareToLaunch(Unknown Source)
    at com.sun.javaws.Launcher.launch(Unknown Source)
    at com.sun.javaws.Main.launchApp(Unknown Source)
    at com.sun.javaws.Main.continueInSecureThread(Unknown Source)
    at com.sun.javaws.Main.access$000(Unknown Source)
    at com.sun.javaws.Main$1.run(Unknown Source)
    at java.lang.Thread.run(Unknown Source)

Answer 1

好的，所以我能夠解決這個問題。

我意識到最簡單的入門方法是使用Netbeans IDE。 使用Netbeans的優點是它為制作Java Web應用程序提供了強大的支持。 例如，對jars進行簽名並正確設置.jnlp文件配置可能是真正的麻煩。 另一方面，Netbeans自動生成這兩個文件，從而避免了犯錯誤的麻煩。

最初，我也嘗試使用eclipse進行同樣的操作，但是我發現eclipse非常繁瑣且容易出錯。 如果制作Java Web Start應用程序，我建議使用Netbeans。 本教程將立即幫助您入門。

在NetBeans IDE中啟用Java Web Start