?? formencode.html
字號:
<HTML>
<HEAD>
<META http-equiv="Content-Type" content="text/html; charset=UTF-8">
<TITLE>Converting x-www-form-urlencoded Data
(Java Developers Almanac Example)
</TITLE>
<META CONTENT="Patrick Chan" NAME="AUTHOR">
<META CONTENT="Code Examples from The Java Developers Almanac 1.4" NAME="DESCRIPTION">
<META CONTENT="Addison-Wesley/Patrick Chan" NAME="OWNER">
<META CONTENT="3/20/02" NAME="revision">
<STYLE TYPE="text/css">
<!-- BODY CODE {font-family: Courier, Monospace; font-size: 11pt} TABLE, BODY {font-family: Verdana, Arial, Helvetica, sans-serif; font-size: 10pt} PRE {font-family: Courier, Monospace; font-size: 10pt} H3 {font-family: Verdana, Arial, Helvetica, sans-serif; font-size: 11pt} A.eglink {text-decoration: none} A:hover.eglink {text-decoration: underline} -->
</STYLE>
</HEAD>
<BODY>
<TABLE CELLSPACING="0" CELLPADDING="0" BORDER="0">
<TR>
<TD rowspan="3"><A HREF="/?l=ex"><IMG BORDER="0" ALIGN="BOTTOM" HSPACE="10" SRC="/egs/almanac14a.jpg"></A></TD><TD VALIGN="top"><font face="Times" size="6"><b>The Java Developers Almanac 1.4</b></font>
<br>
Order this book from <a href="/cgi-bin/scripts/redirect.pl?l=ex&url=http://www.amazon.com/exec/obidos/ASIN/0201752808/xeo">Amazon</a>.
</TD>
</TR>
<TR>
<TD align="right" valign="bottom">
<FORM method="get" action="/cgi-bin/search/find.pl">
<INPUT size="25" name="words" type="text"><INPUT value="Search" type="submit">
</FORM>
</TD>
</TR>
</TABLE>
<HR color="#6666cc">
<DIV ALIGN="LEFT">
<A HREF="/">Home</A>
>
<A HREF="../index.html">List of Packages</A>
>
<B><A HREF="../java.net/pkg.html">java.net</A></B><font color="#666666" SIZE="-2">
[27 examples]
</font>
>
<B><A HREF="../java.net/pkg.html#Encodings">Encodings</A></B><font color="#666666" SIZE="-2">
[2 examples]
</font>
</DIV><P>
<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) {
}
</pre>
<P><table width="600" CELLSPACING="0" CELLPADDING="2" BORDER="0">
<tr>
<td bgcolor="#6666cc" align="center"><font color="#ffffff">
Related Examples
</font></td>
</tr>
</table>
e156. <a class="eglink" href="Base64.html?l=rel">
Converting Between a Byte Array and Base64
</a>
<br>
<table width="600" CELLSPACING="0" CELLPADDING="2" BORDER="0">
<tr>
<td align="left">
<br>
See also:
<a class="eglink" href="/egs/java.net/pkg.html?l=rel#Datagram">
Datagram
</a>
<a class="eglink" href="/egs/java.net/pkg.html?l=rel#HTTP">
HTTP
</a>
<a class="eglink" href="/egs/java.net/pkg.html?l=rel#Hostnames%20and%20IP%20Addresses">
Hostnames and IP Addresses
</a>
<a class="eglink" href="/egs/java.net/pkg.html?l=rel#Multicast">
Multicast
</a>
<a class="eglink" href="/egs/java.net/pkg.html?l=rel#Sockets">
Sockets
</a>
<a class="eglink" href="/egs/java.net/pkg.html?l=rel#URLs">
URLs
</a>
</td>
</tr>
</table>
<br>
<br>
<FONT FACE="Verdana, Arial, Helvetica, sans-serif" SIZE="0">
© 2002 Addison-Wesley.
</FONT>
</BODY>
</HTML>
?? 快捷鍵說明
復制代碼
Ctrl + C
搜索代碼
Ctrl + F
全屏模式
F11
切換主題
Ctrl + Shift + D
顯示快捷鍵
?
增大字號
Ctrl + =
減小字號
Ctrl + -