formencode.html
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<TITLE>Converting x-www-form-urlencoded Data
(Java Developers Almanac Example)
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<h3>
e157.
Converting x-www-form-urlencoded Data</h3>
Name/value pairs that are formatted using the
<code>x-www-form-urlencoded</code> specification appear as:
<pre>
name1=value1&name2=value2
</pre>
where <code>nameN</code> and <code>valueN</code> must be escaped. For example,
<code>a+b</code> will appear as <code>a%2Bb</code> when escaped. The <code>URLEncoder</code>
and <code>URLDecoder</code> classes are used to escape the names and values.
<pre>
try {
// Construct a x-www-form-urlencoded string
String line = URLEncoder.encode(<font color="#0066ff"><i>"name1"</i></font>, "UTF-8") + "=" + URLEncoder.encode(<font color="#0066ff"><i>"value1"</i></font>, "UTF-8");
line += "&" + URLEncoder.encode(<font color="#0066ff"><i>"name2"</i></font>, "UTF-8") + "=" + URLEncoder.encode(<font color="#0066ff"><i>"value2"</i></font>, "UTF-8");
// Parse a x-www-form-urlencoded string
String[] pairs = line.split("\\&");
for (int i=0; i<pairs.length; i++) {
String[] fields = pairs[i].split("=");
String name = URLDecoder.decode(fields[0], "UTF-8");
String value = URLDecoder.decode(fields[1], "UTF-8");
}
} catch (UnsupportedEncodingException e) {
}
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Related Examples
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e156. <a class="eglink" href="Base64.html?l=rel">
Converting Between a Byte Array and Base64
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See also:
<a class="eglink" href="/egs/java.net/pkg.html?l=rel#Datagram">
Datagram
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HTTP
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<a class="eglink" href="/egs/java.net/pkg.html?l=rel#Hostnames%20and%20IP%20Addresses">
Hostnames and IP Addresses
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<a class="eglink" href="/egs/java.net/pkg.html?l=rel#Multicast">
Multicast
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<a class="eglink" href="/egs/java.net/pkg.html?l=rel#Sockets">
Sockets
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URLs
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