Java相当于JavaScript的unescape函数

Question

Java编程语言中是否有与JavaScript unescape函数等效的函数？也就是说,如果我的输入是字符串"I%20need%20help%21",则输出必须是"我需要帮助!",例如.

谢谢!

Answer 1

根据我的经验,URLDecoder.decode如果编码字符串中存在非ASCII字符,则可能会失败.例如这段代码:

URLDecoder.decode("%u017C", "UTF-8"); // %u017C is the result of running in Javascript escape('?')

抛出以下异常:

Exception in thread "main" java.lang.IllegalArgumentException: URLDecoder: Illegal hex characters in escape (%) pattern - For input string: "u0"

解决这个问题的最好方法我知道(虽然笨拙)只是在Java中运行Javascript :(

String jsEscapedString = "%u017C";
ScriptEngineManager factory = new ScriptEngineManager();
ScriptEngine engine = factory.getEngineByName("JavaScript");
String result = (String) engine.eval("unescape('" + jsEscapedString + "')");

BTW解决方案受Siva R Vaka的帖子启发