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    <p>First, your JSP page is using UTF-8 character encoding.</p> <pre><code>&lt;%@ page ... pageEncoding="UTF-8"%&gt; </code></pre> <p>However, your Java code isn't using the same character encoding.</p> <pre><code>DataOutputStream wr; try { wr = new DataOutputStream(connection.getOutputStream ()); wr.writeBytes(urlParameters); // &lt;--- Wrong! Uses platform default encoding. wr.flush(); </code></pre> <p>You need to replace that troublesome piece by</p> <pre><code>try { connection.getOutputStream().write(urlParameters.getBytes("UTF-8")); </code></pre> <p>Note that the whole <code>DataOutputStream</code> decoration is unnecessary. It serves an entirely different purpose (namely writing of <code>.dat</code> type files). Don't forget to specify the same charset in the way how you've set your <code>Content-Length</code> header.</p> <hr> <p>Second, the parameter names/values themselves should be URL-encoded in order to be extracted properly form the HTTP request.</p> <pre><code>String urlParameters = "t=" + URLEncoder.encode("выыававыавыавыавфыа", "UTF-8") + "&amp;l=" + URLEncoder.encode("a", "UTF-8"); </code></pre> <hr> <p>Third, your request headers are actually also wrong:</p> <pre><code>connection.setRequestProperty("Content-Type", "text/html"); connection.setRequestProperty("charset", "utf-8"); </code></pre> <p>You aren't sending <code>text/html</code> data at all. You are sending <code>application/x-www-form-urlencoded</code> data. Also, that <code>charset</code> should have been an attribute of the <code>Content-Type</code> header, thus so:</p> <pre><code>connection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded;charset=UTF-8"); </code></pre> <h3>See also:</h3> <ul> <li><a href="https://stackoverflow.com/questions/2793150/how-to-use-java-net-urlconnection-to-fire-and-handle-http-requests">Using java.net.URLConnection to fire and handle HTTP requests</a></li> </ul>
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    1. POHow do I send a POST request in Java?
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    1. POHow do I send a POST request in Java?
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    1. CObut connection.setRequestProperty("charset", "utf-8")?
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    2. COIt just tells the other side what encoding you've used to encode the bytes in the request body. It doesn't perform the actual encoding at all. By the way, this header is actually wrong (the `Content-Type` also). See the updated answer (and the "See also" link, it's all therein).
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    3. COThank you @BalusC but i think my problem is other, because no change.
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