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URLEncoder (Java 2 Platform SE v1.4.2)
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java.net</FONT>
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Class URLEncoder</H2>
<PRE>
<A HREF="../../java/lang/Object.html" title="class in java.lang">java.lang.Object</A>
<IMG SRC="../../resources/inherit.gif" ALT="extended by"><B>java.net.URLEncoder</B>
</PRE>
<HR>
<DL>
<DT>public class <B>URLEncoder</B><DT>extends <A HREF="../../java/lang/Object.html" title="class in java.lang">Object</A></DL> <P>
Utility class for HTML form encoding. This class contains static methods
for converting a String to the <CODE>application/x-www-form-urlencoded</CODE> MIME
format. For more information about HTML form encoding, consult the HTML
<A HREF="http://www.w3.org/TR/html4/">specification</A>.
用于HTML表单编码的工具类，这个类含有将字符串编码为application/x-www-form-urlencoded这样
MIME格式的方法。关于HTML表单编码的更多细节，查阅HTML规范。
<p>
When encoding a String, the following rules apply:
当对字符串编码时，遵循以下规则：
<p>
<ul>
<li>The alphanumeric characters "<code>a</code>" through
"<code>z</code>", "<code>A</code>" through
"<code>Z</code>" and "<code>0</code>"
through "<code>9</code>" remain the same.
字母数字的字符，a-z，A-Z，0-9保持不变。
<li>The special characters "<code>.</code>",
"<code>-</code>", "<code>*</code>", and
"<code>_</code>" remain the same.
特殊字符.，-，*和_保持不变。
<li>The space character "<code> </code>" is
converted into a plus sign "<code>+</code>".
空格字符被转换成+号。
<li>All other characters are unsafe and are first converted into
one or more bytes using some encoding scheme. Then each byte is
represented by the 3-character string
"<code>%<i>xy</i></code>", where <i>xy</i> is the
two-digit hexadecimal representation of the byte.
The recommended encoding scheme to use is UTF-8. However,
for compatibility reasons, if an encoding is not specified,
then the default encoding of the platform is used.
其他所有的字符都是不安全的，首先按照编码规范转换成一个或更多的字节。每一个字节被表示成
3字符的字符串%xy。xy是该字节的两个十六进制位表示，推荐的编码规范是UTF-8。
然而，出于兼容性考虑，如果编码没有被指定，那么默认平台所使用的编码。
</ul> <p>
For example using UTF-8 as the encoding scheme the string "The
string ü@foo-bar" would get converted to
"The+string+%C3%BC%40foo-bar" because in UTF-8 the character
ü is encoded as two bytes C3 (hex) and BC (hex), and the
character @ is encoded as one byte 40 (hex).
以UTF-8编码举例，字符串“The string ü@foo-bar”将被转换成“The+string+%C3%BC%40foo-bar”，
因为在UTF-8中，字符ü被编码成C3(16进制)和BC(16进制)，字符@被编码成一个字节40(16进制)。
<P> <P>
<DL>
<DT><B>Since:</B></DT>
<DD>JDK1.0</DD>
</DL>
<HR> <P>
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static <A HREF="../../java/lang/String.html" title="class in java.lang">String</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../java/net/URLEncoder.html#encode(java.lang.String)">encode</A></B>(<A HREF="../../java/lang/String.html" title="class in java.lang">String</A> s)</CODE> <BR>
<B>Deprecated.</B> <I>The resulting string may vary depending on the platform's
default encoding. Instead, use the encode(String,String)
method to specify the encoding.
结果字符串可能根据平台默认编码而改变。代之以使用encode(String,String)方法来指定编码。</I></TD>
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<CODE>static <A HREF="../../java/lang/String.html" title="class in java.lang">String</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../java/net/URLEncoder.html#encode(java.lang.String, java.lang.String)">encode</A></B>(<A HREF="../../java/lang/String.html" title="class in java.lang">String</A> s,
<A HREF="../../java/lang/String.html" title="class in java.lang">String</A> enc)</CODE> <BR>
Translates a string into <code>application/x-www-form-urlencoded</code>
format using a specific encoding scheme.
使用指定的编码规范将字符串转换成application/x-www-form-urlencoded格式。</TD>
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<TD><B>Methods inherited from class java.lang.<A HREF="../../java/lang/Object.html" title="class in java.lang">Object</A></B></TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE><A HREF="../../java/lang/Object.html#clone()">clone</A>, <A HREF="../../java/lang/Object.html#equals(java.lang.Object)">equals</A>, <A HREF="../../java/lang/Object.html#finalize()">finalize</A>, <A HREF="../../java/lang/Object.html#getClass()">getClass</A>, <A HREF="../../java/lang/Object.html#hashCode()">hashCode</A>, <A HREF="../../java/lang/Object.html#notify()">notify</A>, <A HREF="../../java/lang/Object.html#notifyAll()">notifyAll</A>, <A HREF="../../java/lang/Object.html#toString()">toString</A>, <A HREF="../../java/lang/Object.html#wait()">wait</A>, <A HREF="../../java/lang/Object.html#wait(long)">wait</A>, <A HREF="../../java/lang/Object.html#wait(long, int)">wait</A></CODE></TD>
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</TABLE> <A NAME="encode(java.lang.String)"><!-- --></A><H3>
encode</H3>
<PRE>
public static <A HREF="../../java/lang/String.html" title="class in java.lang">String</A> <B>encode</B>(<A HREF="../../java/lang/String.html" title="class in java.lang">String</A> s)</PRE>
<DL>
<DD><B>Deprecated.</B> <I>The resulting string may vary depending on the platform's
default encoding. Instead, use the encode(String,String)
method to specify the encoding.
结果字符串可能根据平台默认编码而改变。代之以使用encode(String,String)方法来指定编码。</I>
<P>
<DD>Translates a string into <code>x-www-form-urlencoded</code>
format. This method uses the platform's default encoding
as the encoding scheme to obtain the bytes for unsafe characters.
将字符串转换成application/x-www-form-urlencoded格式。该方法使用平台默认的编码作为编码规范来获得非安全字符的字节。
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>s</CODE> - <code>String</code> to be translated. 要转换的字符串。
<DT><B>Returns:</B><DD>the translated <code>String</code>. 转换后的字符串。</DL>
</DD>
</DL>
<HR> <A NAME="encode(java.lang.String, java.lang.String)"><!-- --></A><H3>
encode</H3>
<PRE>
public static <A HREF="../../java/lang/String.html" title="class in java.lang">String</A> <B>encode</B>(<A HREF="../../java/lang/String.html" title="class in java.lang">String</A> s,
<A HREF="../../java/lang/String.html" title="class in java.lang">String</A> enc)
throws <A HREF="../../java/io/UnsupportedEncodingException.html" title="class in java.io">UnsupportedEncodingException</A></PRE>
<DL>
<DD>Translates a string into <code>application/x-www-form-urlencoded</code>
format using a specific encoding scheme. This method uses the
supplied encoding scheme to obtain the bytes for unsafe
characters.
使用指定的编码规范将字符串转换成application/x-www-form-urlencoded格式。该方法使用支持的编码规范来获得非安全字符的字节。
<p>
<em><strong>Note:</strong> The <a href=
"http://www.w3.org/TR/html40/appendix/notes.html#non-ascii-chars">
World Wide Web Consortium Recommendation</a> states that
UTF-8 should be used. Not doing so may introduce
incompatibilites.</em>
World Wide Web Consortium Recommendation声明应该使用UTF-8，不这样做可能造成不兼容。
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>s</CODE> - <code>String</code> to be translated. 要转换的字符串。<DD><CODE>enc</CODE> - The name of a supported
<a href="../lang/package-summary.html#charenc">character
encoding</a>. 支持的字符编码名称。
<DT><B>Returns:</B><DD>the translated <code>String</code>. 转换后的字符串。
<DT><B>Throws:</B>
<DD><CODE><A HREF="../../java/io/UnsupportedEncodingException.html" title="class in java.io">UnsupportedEncodingException</A></CODE> - If the named encoding is not supported
如果不支持指定名称的编码抛出<DT><B>Since:</B></DT>
<DD>1.4</DD>
<DT><B>See Also:</B><DD><A HREF="../../java/net/URLDecoder.html#decode(java.lang.String, java.lang.String)"><CODE>URLDecoder.decode(java.lang.String, java.lang.String)</CODE></A></DL>
</DD>
</DL>
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