Java 位置 0 处的意外标记“END OF FILE”（JSON）
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Unexpected token 'END OF FILE' at position 0 (JSON)
提问by Staartvin
I'm trying to retreive a name from a UUID via a website, using the API Mojang provided.
我正在尝试使用提供的 API Mojang 通过网站从 UUID 中检索名称。
This is the code I use (I verified that it works):
这是我使用的代码（我验证它有效）：
@Override
public Map<UUID, String> call() throws Exception {
Map<UUID, String> uuidStringMap = new HashMap<UUID, String>();
for (UUID uuid : uuids) {
HttpURLConnection connection = (HttpURLConnection) new URL(
PROFILE_URL + uuid.toString().replace("-", ""))
.openConnection();
JSONObject response;
System.out.println("String: " + fromStream(connection.getInputStream()));
System.out.print("Line: " + uuid.toString());
String name = null;
try {
response = (JSONObject) jsonParser
.parse(new InputStreamReader(connection.getInputStream()));
name = (String) response.get("name");
if (name == null) {
continue;
}
String cause = (String) response.get("cause");
String errorMessage = (String) response.get("errorMessage");
if (cause != null && cause.length() > 0) {
throw new IllegalStateException(errorMessage);
}
} catch (Exception e) {
System.out.print("Could not parse uuid '" + uuid.toString() + "' to name!");
System.out.print("Trying Bukkit.getOfflinePlayer()");
OfflinePlayer oPlayer = Bukkit.getOfflinePlayer(uuid);
if (oPlayer != null && oPlayer.getFirstPlayed() != 0) {
name = oPlayer.getName();
System.out.print("Got player " + name);
} else {
System.out.print("Could not retrieve player with Bukkit.getOfflinePlayer()");
e.printStackTrace();
}
//throw new Exception("Could not parse uuid '" + uuid.toString() + "' to name!");
}
uuidStringMap.put(uuid, name);
}
return uuidStringMap;
}
Don't mind all the System.out.print lines, that's just to debug things.
不要介意所有 System.out.print 行，这只是为了调试。
It errors with this error:
它出现此错误：
[17:35:56 WARN]: Unexpected token END OF FILE at position 0.
[17:35:56 WARN]: at org.json.simple.parser.JSONParser.parse(Unknown Source)
[17:35:56 WARN]: at org.json.simple.parser.JSONParser.parse(Unknown Source)
[17:35:56 WARN]: at me.armar.plugins.autorank.util.uuid.NameFetcher.call(
NameFetcher.java:59)
[17:35:56 WARN]: at me.armar.plugins.autorank.util.uuid.UUIDManager.run
(UUIDManager.java:222)
[17:35:56 WARN]: at java.lang.Thread.run(Unknown Source)
Now, I've run the returned json through a few JSON online parsers. They all tell me the JSON is correct. This is the JSON that is being returned:
现在，我已经通过一些 JSON 在线解析器运行了返回的 json。他们都告诉我 JSON 是正确的。这是正在返回的 JSON：
{"id":"cb994e15a57a4157953ab29577229ebe","name":"tator0 1","properties":[{"name":"textures","value":"eyJ0aW1lc3RhbXAiOjE0MDQ4MzM3NTM0MTYsInByb2ZpbGVJZCI6ImNiOTk0ZTE1YTU3YTQxNTc5NTNhYjI5NTc3MjI5ZWJlIiwicHJvZmlsZU5hbWUiOiJ0YXRvcjAxIiwiaXNQdWJsaWMiOnRydWUsInRleHR1cmVzIjp7IlNLSU4iOnsidXJsIjoiaHR0cDovL3RleHR1cmVzLm1pbmVjcmFmdC5uZXQvdGV4dHVyZS80Nzk5MjQ4NGJmNjUyODJhMTQzOWI0MGQ1NWU2ZTRjZGQxNGRmYzAyNGE0MzA3Y2M2YTM1M2Q4MzY1OThkZDUifX19","signature":"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"}],"legacy":true}
I saw that there also was someone else with a kind of similiar issue, here.
我看到，也有带着一种similiar问题，别人在这里。
Where could that unexpected token be?
那个意想不到的令牌会在哪里？
回答by LiveMynd
Try applying .toString() to your input string before parsing.
在解析之前尝试将 .toString() 应用于您的输入字符串。
For example:
例如：
DataInputStream in = new DataInputStream(clientSocket.getInputStream());
String dataIn = in.readUTF();
JSONObject jobj = (JSONObject) parser.parse(dataIn.toString());
Worked for me just moments ago. :D
不久前为我工作。:D
回答by Jimilian
In my case I was trying to parse empty file. So, I just added simple check before parsing and issue had disappeared.
就我而言，我试图解析空文件。所以，我只是在解析和问题消失之前添加了简单的检查。
