使用java代码发送HTTP Post请求

使用java代码发送HTTP Post请求
代码如下，不用过多解释了吧：

package imscportal.transform.http.channel.impl;

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLDecoder;

import imscportal.transform.http.channel.spi.IHttpChannel;
import imscportal.util.log.LoggerMap;
import imscportal.util.log.MyLogger;
import imscportal.util.parameter.IMSCParameter;

public class HttpChannel implements IHttpChannel {
    private MyLogger logger = LoggerMap.getLogger(this.getClass());
    private URL url;

    public HttpChannel(String url) throws Exception {
        this.url = new URL(url);
    }

    public String sendPostRequest(String content) throws Exception {
        logger.debug("try to open http connection to: '" + this.url.getPath()
                + ":" + this.url.getPort() + "'");
        HttpURLConnection conn = (HttpURLConnection) this.url.openConnection();
       
        conn.setConnectTimeout(IMSCParameter
                .getHTTP_POST_REQUEST_CONNECT_TIMEOUT());
        conn.setReadTimeout(IMSCParameter.getHTTP_POST_RESPONSE_READ_TIMEOUT());
        conn.setDoOutput(true);
        conn.setRequestMethod("POST");
       
        logger.debug("try to get output stream");
        OutputStream output = conn.getOutputStream();
       
        logger.debug("try to write '" + content + "'");
        output.write(content.getBytes());
        output.flush();
        output.close();
       
        logger.debug("try to get input stream");
        BufferedReader reader = new BufferedReader(new InputStreamReader(conn
                .getInputStream()));
        String line;
        StringBuffer buffer = new StringBuffer(IMSCParameter
                .getHTTP_POST_RESPONSE_BUFFER_SIZE());
       
        while ((line = reader.readLine()) != null) {
            buffer.append(line);
        }
       
        String value = buffer.toString();
        logger.debug("get resposne: '" + value + "'");
       
        value = URLDecoder.decode(value, IMSCParameter.getINTERNAL_CHARSET());
        return value;
    }

}