Java Apache Commons WordUtils.wrap（）在運行時拋出SecurityException

Question

在執行org.apache.commons.lang3.text.WordUtils類之後好了，我希望能夠使用WordUtils.wrap(String str, int width)函數。但我達到了減速。

我能夠編譯這個程序（我應該提到的是一個小程序），沒有一個單一的問題。我只需設置一個CLASSPATH環境變量來引用apache jar文件，然後通過appletviewer讓程序運行。但是，當我到達使用WordUtils.wrap()函數的代碼的一部分時，所有內容都變得很酸，並且在命令提示符處出現大約20行的運行時錯誤。

錯誤：

Caught a SecurityException reading the system property 'awt.toolkit'; the System 
Utils property value will default to null. 
Caught a SecurityException reading the system property 'file.encoding'; the Syst 
emUtils property value will default to null. 
Caught a SecurityException reading the system property 'java.awt.fonts'; the Sys 
temUtils property value will default to null. 
Caught a SecurityException reading the system property 'java.awt.graphicsenv'; t 
he SystemUtils property value will default to null. 
Caught a SecurityException reading the system property 'java.awt.headless'; the 
SystemUtils property value will default to null. 
Caught a SecurityException reading the system property 'java.awt.printerjob'; th 
e SystemUtils property value will default to null. 
Caught a SecurityException reading the system property 'java.class.path'; the Sy 
stemUtils property value will default to null. 
Caught a SecurityException reading the system property 'java.compiler'; the Syst 
emUtils property value will default to null. 
Caught a SecurityException reading the system property 'java.endorsed.dirs'; the 
SystemUtils property value will default to null. 
Caught a SecurityException reading the system property 'java.ext.dirs'; the Syst 
emUtils property value will default to null. 
Caught a SecurityException reading the system property 'java.home'; the SystemUt 
ils property value will default to null. 
Caught a SecurityException reading the system property 'java.io.tmpdir'; the Sys 
temUtils property value will default to null. 
Caught a SecurityException reading the system property 'java.library.path'; the 
SystemUtils property value will default to null. 
Caught a SecurityException reading the system property 'java.runtime.name'; the 
SystemUtils property value will default to null. 
Caught a SecurityException reading the system property 'java.runtime.version'; t 
he SystemUtils property value will default to null. 
Caught a SecurityException reading the system property 'java.util.prefs.Preferen 
cesFactory'; the SystemUtils property value will default to null. 
Caught a SecurityException reading the system property 'java.vm.info'; the Syste 
mUtils property value will default to null. 
Caught a SecurityException reading the system property 'user.country'; the Syste 
mUtils property value will default to null. 
Caught a SecurityException reading the system property 'user.region'; the System 
Utils property value will default to null. 
Caught a SecurityException reading the system property 'user.dir'; the SystemUti 
ls property value will default to null. 
Caught a SecurityException reading the system property 'user.home'; the SystemUt 
ils property value will default to null. 
Caught a SecurityException reading the system property 'user.language'; the Syst 
emUtils property value will default to null. 
Caught a SecurityException reading the system property 'user.name'; the SystemUt 
ils property value will default to null. 
Caught a SecurityException reading the system property 'user.timezone'; the Syst 
emUtils property value will default to null. 

這裏是代碼，使一切麻煩行：

String strWrap = WordUtils.wrap("A really really really really really long sentence.", 50); 

這裏發生了什麼？

Answer 1

如何使在線分離器作爲參數繞過SystemUtils訪問：

String strWrap = WordUtils.wrap("A really really really really really long sentence.", 50, "\n", false); 

Answer 2

代碼使用WordUtils其中，以找到您的系統使用的行分隔符調用SystemUtils：

newLineStr = SystemUtils.LINE_SEPARATOR; 

SystemUtils正在努力讀書，一個小程序可能不能讀取系統屬性，因瀏覽器中的安全限制。

的documentation爲SystemUtils說：

如果系統屬性不能讀取由於安全限制，在這個類 相應字段將被設置爲null和消息 將被寫入System.err