java 如何在jsp中对字符串进行uri编码?

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时间:2020-10-30 08:46:05  来源:igfitidea点击:

How to uri encode a string in jsp?

javajspjstl

提问by tester

if I have a string "output" that equals a url:

如果我有一个等于 url 的字符串“输出”:

${output} = "/testing/method/thing.do?foo=testing&bar=foo"

in the jsp,how would I convert that string into:

在jsp中,我将如何将该字符串转换为:

%2Ftesting%2Fmethod%2Fthing.do%3Ffoo%3Dtesting%26bar%3Dfoo

using

使用

<c:out value="${output}"/>

? I need to URLEncoder.encode(url) in the c:out somehow.

? 我需要以某种方式在 c:out 中使用 URLEncoder.encode(url)。

回答by BalusC

It's not directly possible with standard JSTL tags/functions. Here's a hack with help of <c:url>:

使用标准 JSTL 标记/函数无法直接实现。这是一个 hack 的帮助<c:url>

<c:url var="url" value=""><c:param name="output" value="${output}" /></c:url>
<c:set var="url" value="${fn:substringAfter(url, '=')}" />
<p>URL-encoded component: ${url}</p>

If you want to do it more cleanly, create an EL function. At the bottom of this answeryou can find a basic kickoff example. You'd like to end up as:

如果你想做得更干净,创建一个 EL 函数。在这个答案的底部,您可以找到一个基本的启动示例。你想最终成为:

<p>URL-encoded component: ${my:urlEncode(output, 'UTF-8')}</p>

with

public static String urlEncode(String value, String charset) throws UnsupportedEncodingException {
    return URLEncoder.encode(value, charset);
}

回答by limc

Try this:-

试试这个:-

<c:out value="${output}" escapeXml="true" />

Granted, this will only escape special characters from XML.

当然,这只会从 XML 中转义特殊字符。