这个类是从java.net.URLEncoder修改来的，经测试能够正常完成URL编码的工作，在几部手机上测试过。使用的时候直接调用URLEncoder.encode("中国")即可如果向服务器端发送。可以使用如下的办法对中文进行编码，然后发送向服务器。

String data = "para="+URLEncoder.encode("参数");http://tech.ddvip.com/2008-11/
outputStream.write(data.getBytes());http://tech.ddvip.com/2008-11/
.......

　　在服务器端以servlet为例 request.getParameter("para")即可获得“参数”。

package com.j2medev.httpme.tools;http://tech.ddvip.com/2008-11/
import java.io.ByteArrayOutputStream;http://tech.ddvip.com/2008-11/
import java.io.IOException;http://tech.ddvip.com/2008-11/
import java.io.OutputStreamWriter;http://tech.ddvip.com/2008-11/
import java.io.UnsupportedEncodingException;http://tech.ddvip.com/2008-11/
/**http://tech.ddvip.com/2008-11/
* Utility class for　form encoding.this class is modified form java.net.URLEncoderhttp://tech.ddvip.com/2008-11/
so that it can work well in cldc env.http://tech.ddvip.com/2008-11/
* This class contains static methodshttp://tech.ddvip.com/2008-11/
* for converting a String to the <CODE>application/x-www-form-urlencoded</CODE> MIMEhttp://tech.ddvip.com/2008-11/
* format. For more information about HTML form encoding, consult the HTMLhttp://tech.ddvip.com/2008-11/
* <A HREF="http://www.w3.org/TR/html4/">specification</A>.http://tech.ddvip.com/2008-11/
*http://tech.ddvip.com/2008-11/
* <p>http://tech.ddvip.com/2008-11/
* When encoding a String, the following rules apply:http://tech.ddvip.com/2008-11/
*http://tech.ddvip.com/2008-11/
* <p>http://tech.ddvip.com/2008-11/
* <ul>http://tech.ddvip.com/2008-11/
* <li>The alphanumeric characters "<code>a</code>" throughhttp://tech.ddvip.com/2008-11/
*　　 "<code>z</code>", "<code>A</code>" throughhttp://tech.ddvip.com/2008-11/
*　　 "<code>Z</code>" and "<code>0</code>"http://tech.ddvip.com/2008-11/
*　　 through "<code>9</code>" remain the same.http://tech.ddvip.com/2008-11/
* <li>The special characters "<code>.</code>",http://tech.ddvip.com/2008-11/
*　　 "<code>-</code>", "<code>*</code>", andhttp://tech.ddvip.com/2008-11/
*　　 "<code>_</code>" remain the same.http://tech.ddvip.com/2008-11/
* <li>The space character "<code> </code>" ishttp://tech.ddvip.com/2008-11/
*　　 converted into a plus sign "<code>+</code>".http://tech.ddvip.com/2008-11/
* <li>All other characters are unsafe and are first converted intohttp://tech.ddvip.com/2008-11/
*　　 one or more bytes using some encoding scheme. Then each byte ishttp://tech.ddvip.com/2008-11/
*　　 represented by the 3-character stringhttp://tech.ddvip.com/2008-11/
*　　 "<code>%<i>xy</i></code>", where <i>xy</i> is thehttp://tech.ddvip.com/2008-11/
*　　 two-digit hexadecimal representation of the byte.http://tech.ddvip.com/2008-11/
*　　 The recommended encoding scheme to use is UTF-8. However,http://tech.ddvip.com/2008-11/
*　　 for compatibility reasons, if an encoding is not specified,http://tech.ddvip.com/2008-11/
*　　 then the default encoding of the platform is used.http://tech.ddvip.com/2008-11/
* </ul>http://tech.ddvip.com/2008-11/
*http://tech.ddvip.com/2008-11/
* <p>http://tech.ddvip.com/2008-11/
* For example using UTF-8 as the encoding scheme the string "Thehttp://tech.ddvip.com/2008-11/
* string ü@foo-bar" would get converted tohttp://tech.ddvip.com/2008-11/
* "The+string+%C3%BC%40foo-bar" because in UTF-8 the characterhttp://tech.ddvip.com/2008-11/
* ü is encoded as two bytes C3 (hex) and BC (hex), and thehttp://tech.ddvip.com/2008-11/
* character @ is encoded as one byte 40 (hex).http://tech.ddvip.com/2008-11/
*http://tech.ddvip.com/2008-11/
*/http://tech.ddvip.com/2008-11/
public class URLEncoder {http://tech.ddvip.com/2008-11/
/** The characters which do not need to be encoded. */http://tech.ddvip.com/2008-11/
private static boolean[] dontNeedEncoding;http://tech.ddvip.com/2008-11/
private static String defaultEncName = "";http://tech.ddvip.com/2008-11/
static final int caseDiff = ('a' - 'A');http://tech.ddvip.com/2008-11/
static {http://tech.ddvip.com/2008-11/
dontNeedEncoding = new boolean[256];http://tech.ddvip.com/2008-11/
int i;http://tech.ddvip.com/2008-11/
for (i = 'a'; i <= 'z'; i++) {http://tech.ddvip.com/2008-11/
dontNeedEncoding[i] = true;http://tech.ddvip.com/2008-11/
}http://tech.ddvip.com/2008-11/
for (i = 'A'; i <= 'Z'; i++) {http://tech.ddvip.com/2008-11/
dontNeedEncoding[i] = true;http://tech.ddvip.com/2008-11/
}http://tech.ddvip.com/2008-11/
for (i = '0'; i <= '9'; i++) {http://tech.ddvip.com/2008-11/
dontNeedEncoding[i] = true;http://tech.ddvip.com/2008-11/
}http://tech.ddvip.com/2008-11/
dontNeedEncoding[' '] = true; // encoding a space to a + is donehttp://tech.ddvip.com/2008-11/
in the encode() methodhttp://tech.ddvip.com/2008-11/
dontNeedEncoding['-'] = true;http://tech.ddvip.com/2008-11/
dontNeedEncoding['_'] = true;http://tech.ddvip.com/2008-11/
dontNeedEncoding['.'] = true;http://tech.ddvip.com/2008-11/
dontNeedEncoding['*'] = true;http://tech.ddvip.com/2008-11/
defaultEncName = System.getProperty("microedition.encoding");http://tech.ddvip.com/2008-11/
if(defaultEncName == null