Weird java.lang.ExceptionInInitializerError - JSoup

在我最新的項目中，我使用JSoup來檢索一個網頁，獲取所有帶有「.heads」類的元素，然後將它的特定部分保存到一個文件中。當我運行它，我得到這個錯誤：Weird java.lang.ExceptionInInitializerError - JSoup

java.lang.ExceptionInInitializerError 
    at org.jsoup.nodes.Entities$EscapeMode.<clinit>(Entities.java:19) ~[?:?] 
    at org.jsoup.nodes.Document$OutputSettings.<init>(Document.java:373) ~[?:?] 
    at org.jsoup.nodes.Document.<init>(Document.java:18) ~[?:?] 
    at org.jsoup.parser.TreeBuilder.initialiseParse(TreeBuilder.java:29) ~[?:?] 
    at org.jsoup.parser.TreeBuilder.parse(TreeBuilder.java:42) ~[?:?] 
    at org.jsoup.parser.HtmlTreeBuilder.parse(HtmlTreeBuilder.java:53) ~[?:?] 
    at org.jsoup.parser.Parser.parseInput(Parser.java:30) ~[?:?] 
    at org.jsoup.helper.DataUtil.parseByteData(DataUtil.java:94) ~[?:?] 
    at org.jsoup.helper.HttpConnection$Response.parse(HttpConnection.java:603) ~[?:?] 
    at org.jsoup.helper.HttpConnection.get(HttpConnection.java:195) ~[?:?] 
    at de.zbs.advancedheads.main.AdvancedHeads.downloadDatabase(AdvancedHeads.java:48) ~[?:?] 
    at de.zbs.advancedheads.main.AdvancedHeads.onEnable(AdvancedHeads.java:33) ~[?:?] 
    at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:321) ~[spigot-1.8.8-R0.1-SNAPSHOT-latest.jar:git-Spigot-fdc1440-53fac9f] 
    at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:340) [spigot-1.8.8-R0.1-SNAPSHOT-latest.jar:git-Spigot-fdc1440-53fac9f] 
    at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:405) [spigot-1.8.8-R0.1-SNAPSHOT-latest.jar:git-Spigot-fdc1440-53fac9f] 
    at org.bukkit.craftbukkit.v1_8_R3.CraftServer.loadPlugin(CraftServer.java:357) [spigot-1.8.8-R0.1-SNAPSHOT-latest.jar:git-Spigot-fdc1440-53fac9f] 
    at org.bukkit.craftbukkit.v1_8_R3.CraftServer.enablePlugins(CraftServer.java:317) [spigot-1.8.8-R0.1-SNAPSHOT-latest.jar:git-Spigot-fdc1440-53fac9f] 
    at org.bukkit.craftbukkit.v1_8_R3.CraftServer.reload(CraftServer.java:741) [spigot-1.8.8-R0.1-SNAPSHOT-latest.jar:git-Spigot-fdc1440-53fac9f] 
    at org.bukkit.Bukkit.reload(Bukkit.java:535) [spigot-1.8.8-R0.1-SNAPSHOT-latest.jar:git-Spigot-fdc1440-53fac9f] 
    at org.bukkit.command.defaults.ReloadCommand.execute(ReloadCommand.java:25) [spigot-1.8.8-R0.1-SNAPSHOT-latest.jar:git-Spigot-fdc1440-53fac9f] 
    at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:141) [spigot-1.8.8-R0.1-SNAPSHOT-latest.jar:git-Spigot-fdc1440-53fac9f] 
    at org.bukkit.craftbukkit.v1_8_R3.CraftServer.dispatchCommand(CraftServer.java:641) [spigot-1.8.8-R0.1-SNAPSHOT-latest.jar:git-Spigot-fdc1440-53fac9f] 
    at org.bukkit.craftbukkit.v1_8_R3.CraftServer.dispatchServerCommand(CraftServer.java:627) [spigot-1.8.8-R0.1-SNAPSHOT-latest.jar:git-Spigot-fdc1440-53fac9f] 
    at net.minecraft.server.v1_8_R3.DedicatedServer.aO(DedicatedServer.java:412) [spigot-1.8.8-R0.1-SNAPSHOT-latest.jar:git-Spigot-fdc1440-53fac9f] 
    at net.minecraft.server.v1_8_R3.DedicatedServer.B(DedicatedServer.java:375) [spigot-1.8.8-R0.1-SNAPSHOT-latest.jar:git-Spigot-fdc1440-53fac9f] 
    at net.minecraft.server.v1_8_R3.MinecraftServer.A(MinecraftServer.java:653) [spigot-1.8.8-R0.1-SNAPSHOT-latest.jar:git-Spigot-fdc1440-53fac9f] 
    at net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:556) [spigot-1.8.8-R0.1-SNAPSHOT-latest.jar:git-Spigot-fdc1440-53fac9f] 
    at java.lang.Thread.run(Unknown Source) [?:1.8.0_73] 
Caused by: java.lang.NullPointerException 
    at java.util.Properties$LineReader.readLine(Unknown Source) ~[?:1.8.0_73] 
    at java.util.Properties.load0(Unknown Source) ~[?:1.8.0_73] 
    at java.util.Properties.load(Unknown Source) ~[?:1.8.0_73] 
    at org.jsoup.nodes.Entities.loadEntities(Entities.java:236) ~[?:?] 
    at org.jsoup.nodes.Entities.<clinit>(Entities.java:220) ~[?:?] 
    ... 28 more

我的代碼如下：

private boolean downloadDatabase() { 
    new File(path).mkdirs(); 
    try { 
     Document doc = Jsoup.connect("http://heads.freshcoal.com/maincollection.php").get(); 
     Elements head = doc.select(".heads"); 
     System.out.println(head); 
     for (Element e : head) { 
      Attributes att = e.attributes(); 
      System.out.println(att); 
      String command = att.get("data-clipboard-text"); 
      System.out.println(command); 
      String remover = command.replace("/give @p skull 1 3 {display:{Name:\"", ""); 
      String name = remover.substring(0, 5); 
      Bukkit.broadcastMessage(name); 
      String texture = remover.substring(30, 50); 
      Bukkit.broadcastMessage(texture); 
     } 
     return true; 
    } catch (IOException e) { 
     e.printStackTrace(); 
     return false; 
    } 
}

是的，我已經籤羯羊安裝jsoup庫，我不知道怎麼做它是一個圖書館，所以我只是把它的來源，並把它放到我的項目。

感謝您提前提供任何幫助！

來源

2016-02-11 TheLexoPlexx

哪一行給出錯誤 – Abdelhak

看起來像是應該在JSoup中嵌入的'entities-base.properties'文件存在問題...... –

看起來像添加源碼不能解決庫問題.. 。我正在使用eclipse，將.jar添加到「構建路徑」並在'export'和'導出順序'上勾選了checkebox。仍然得到一個'java.lang.NoClassDefFoundError：org/jsoup/Jsoup' – TheLexoPlexx

問題是你基本上對圖書館所做的一切。你不需要使它是一個庫 - 你只需download it as a jar file並把它放在你的類路徑中。

看起來您已經包含了源代碼，但是您並未包含假定可用的屬性文件 - 在本例中爲entities-base.properties。你得到NullPointerException，因爲Entities.class.getResourceAsStream(filename)正在返回null。雖然毫無疑問的解決方法是用「只包含源代碼」的方法解決這個問題，但是你確實應該使用預先包裝好的jar文件。

來源

2016-02-11 21:51:01

這總是給我一個'java.lang.NoClassDefFoundError：org/jsoup/Jsoup' – TheLexoPlexx

@TesseractLabs：那只是意味着你沒有把它放在類路徑正確。我們不知道你是如何運行你的代碼的，這很難提供幫助。 –

「你如何運行你的代碼」是什麼意思？我將它添加到eclipse中的Build-Path中，並將其添加到「導出」和「導出順序」中... – TheLexoPlexx

Weird java.lang.ExceptionInInitializerError - JSoup

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