Android:PatternSyntaxException:语法错误U_ILLEGAL_ARGUMENT_ERROR [英] Android: PatternSyntaxException: Syntax error U_ILLEGAL_ARGUMENT_ERROR

问题描述

我正在使用 json-io 将一些JSON数据转换为Java对象:

I'm using json-io for converting some JSON data to Java objects:

DataTransferContainer dataTransferContainer = (DataTransferContainer)JsonReader.jsonToJava(json);

DataTransferContainer只是一个包含一些GeoJson元素的对象.没关系，这个问题.

DataTransferContainer is just an object containing some GeoJson elements. It does not matter for this issue.

以上代码可在Android之外的JUnit测试中使用，但是当我在Android上运行此代码时，会收到以下RuntimeException:

The above code works in JUnit test outside Android, but when I run this on Android, I get this RuntimeException:

12-07 20:12:51.260: E/AndroidRuntime(2002): FATAL EXCEPTION: AsyncTask #1
12-07 20:12:51.260: E/AndroidRuntime(2002): java.lang.RuntimeException: An error occured while executing doInBackground()
12-07 20:12:51.260: E/AndroidRuntime(2002):     at android.os.AsyncTask$3.done(AsyncTask.java:200)
12-07 20:12:51.260: E/AndroidRuntime(2002):     at java.util.concurrent.FutureTask$Sync.innerSetException(FutureTask.java:274)
12-07 20:12:51.260: E/AndroidRuntime(2002):     at java.util.concurrent.FutureTask.setException(FutureTask.java:125)
12-07 20:12:51.260: E/AndroidRuntime(2002):     at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:308)
12-07 20:12:51.260: E/AndroidRuntime(2002):     at java.util.concurrent.FutureTask.run(FutureTask.java:138)
12-07 20:12:51.260: E/AndroidRuntime(2002):     at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1088)
12-07 20:12:51.260: E/AndroidRuntime(2002):     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:581)
12-07 20:12:51.260: E/AndroidRuntime(2002):     at java.lang.Thread.run(Thread.java:1019)
12-07 20:12:51.260: E/AndroidRuntime(2002): Caused by: java.lang.ExceptionInInitializerError
12-07 20:12:51.260: E/AndroidRuntime(2002):     at com.mydomain.myapp.dataprocessing.JsonConverter.jsonObjectToObject(JsonConverter.java:22)
12-07 20:12:51.260: E/AndroidRuntime(2002):     at com.mydomain.myapp.dataprocessing.DataManagerTask.processDataFromRemote(DataManagerTask.java:104)
12-07 20:12:51.260: E/AndroidRuntime(2002):     at com.mydomain.myapp.dataprocessing.DataManagerTask.doInBackground(DataManagerTask.java:56)
12-07 20:12:51.260: E/AndroidRuntime(2002):     at com.mydomain.myapp.dataprocessing.DataManagerTask.doInBackground(DataManagerTask.java:18)
12-07 20:12:51.260: E/AndroidRuntime(2002):     at android.os.AsyncTask$2.call(AsyncTask.java:185)
12-07 20:12:51.260: E/AndroidRuntime(2002):     at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:306)
12-07 20:12:51.260: E/AndroidRuntime(2002):     ... 4 more
12-07 20:12:51.260: E/AndroidRuntime(2002): Caused by: java.util.regex.PatternSyntaxException: Syntax error U_ILLEGAL_ARGUMENT_ERROR
12-07 20:12:51.260: E/AndroidRuntime(2002): (\d{2})[:.](\d{2})[:.](\d{2})[.](\d{1,10})([+-]\d{2}[:]?\d{2}|Z)?
12-07 20:12:51.260: E/AndroidRuntime(2002):     at java.util.regex.Pattern.compileImpl(Native Method)
12-07 20:12:51.260: E/AndroidRuntime(2002):     at java.util.regex.Pattern.compile(Pattern.java:400)
12-07 20:12:51.260: E/AndroidRuntime(2002):     at java.util.regex.Pattern.<init>(Pattern.java:383)
12-07 20:12:51.260: E/AndroidRuntime(2002):     at java.util.regex.Pattern.compile(Pattern.java:374)
12-07 20:12:51.260: E/AndroidRuntime(2002):     at com.cedarsoftware.util.io.JsonReader.<clinit>(JsonReader.java:114)
12-07 20:12:51.260: E/AndroidRuntime(2002):     ... 10 more

在JsonReader中，第114行如下所示:

In JsonReader, line 114 looks like this:

private static final Pattern timePattern1 = Pattern.compile("(\\d{2})[:.](\\d{2})[:.](\\d{2})[.](\\d{1,10})([+-]\\d{2}[:]?\\d{2}|Z)?");

我能够缩小范围.这是此部分: [:.]

I was able to narrow it down. It's this part: [:.]

它仅表示任何字符"或冒号". Android上有什么问题?

It just means "any character" or "colon". What's wrong with that on Android?

推荐答案

在ICU正则表达式模式中，括号表达式模式不能以:开头.

In ICU regex patterns, bracket expression pattern cannot start with :.

您需要将模式更改为

Pattern.compile("(\\d{2})[.:](\\d{2})[.:](\\d{2})[.](\\d{1,10})([+-]\\d{2}:?\\d{2}|Z)?")

请注意更改:

• [:]更改为:
• [:.]更改为[.:]

• [:] is changed to :
• [:.] is changed to [.:]

Android中使用的regex库是ICU，其特点之一是它支持POSIX字符类 outside 括号表达式.这意味着您可以写[[:digit:]]来匹配数字或[:digit:](在包括POSIX在内的大多数其他正则表达式版本中无效). ICU正则表达式解析器似乎在解析以:开头的方括号表达式时遇到问题，并且肯定是一个错误.

The regex library used in Android is ICU, and one of its peculiarities is that it supports POSIX character classes outside bracket expressions. That means you may write [[:digit:]] to match a digit, or [:digit:] (which is invalid in most other regex flavors including POSIX). The ICU regex parser seems to have problems parsing bracket expressions starting with : and surely it is a bug.

这篇关于Android:PatternSyntaxException:语法错误U_ILLEGAL_ARGUMENT_ERROR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！