Java下通过发送http post请求的代码，javapost,package com.

Java下通过发送http post请求的代码，javapost,package com.

package com.everyone.android.net;import java.io.IOException;import java.io.InputStream;import java.io.OutputStream;import java.net.HttpURLConnection;import java.net.URL;import java.net.URLEncoder;import java.util.Map;import org.apache.http.protocol.HTTP;import com.everyone.android.callback.ParseCallback;import com.everyone.android.callback.ResultCallback;/** * 功能描述：通过HTTP协议发送POST请求 * @author android_ls * */public class AsyncHttpPost extends AsyncBaseRequest {    /**     *      */    private static final long serialVersionUID = 3L;    public AsyncHttpPost(String url, Map<String, String> parameter,            ParseCallback handler, ResultCallback requestCallback) {        super(url, parameter, handler, requestCallback);    }    @Override    protected InputStream getRequestResult() throws IOException {        StringBuilder sb = new StringBuilder();        if(parameter!=null && !parameter.isEmpty()){            for(Map.Entry<String, String> entry : parameter.entrySet()){                sb.append(entry.getKey()).append('=')                    .append(URLEncoder.encode(entry.getValue(), HTTP.UTF_8)).append('&');            }            sb.deleteCharAt(sb.length()-1);        }        // 得到实体的二进制数据        byte[] entitydata = sb.toString().getBytes();        URL url = new URL(requestUrl);        mHttpURLConn = (HttpURLConnection)url.openConnection();        mHttpURLConn.setRequestMethod("POST");        mHttpURLConn.setConnectTimeout(5 * 1000);        // 如果通过post提交数据，必须设置允许对外输出数据        mHttpURLConn.setDoOutput(true);        mHttpURLConn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");        mHttpURLConn.setRequestProperty("Content-Length", String.valueOf(entitydata.length));        OutputStream outStream = mHttpURLConn.getOutputStream();        outStream.write(entitydata);        outStream.flush();        outStream.close();        if(mHttpURLConn.getResponseCode()== HttpURLConnection.HTTP_OK){            return mHttpURLConn.getInputStream();        }        return null;    }}