Java相当于JavaScript的unescape函数

时间:2011-11-25 20:21:59

标签: java javascript escaping

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!

4 个答案:

答案 0 :(得分:8)

如果编码字符串中存在非ASCII字符,根据我的经验URLDecoder.decode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('ż')

抛出以下异常:

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

我所知道的解决这个问题的最佳方法(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 + "')");

Siva R Vaka's post

启发的BTW解决方案

答案 1 :(得分:4)

您可以使用URLDecoder。假设您使用的是UTF-8:

String result = URLDecoder.decode(s, "UTF-8");

答案 2 :(得分:1)

试试这个

URLDecoder dec = new URLDecoder();
        String val = dec.decode("I%20need%20help%21","UTF-8");
        System.out.println(val);

答案 3 :(得分:0)

这很好@Nrj,但开发人员要静态调用它。

URLDecoder.decode("I%20need%20help%21","UTF-8");