java模拟post发送

下面是一个java模拟post的比较通用的例子

java 代码

import java.io.OutputStreamWriter;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.Map.Entry;
public class SendPostMessage {

    private HttpURLConnection conn = null;

        public boolean send(String urlAddr, Map map) throws Exception {

            boolean isSuccess = false;
            StringBuffer params = new StringBuffer();

            Iterator it = map.entrySet().iterator();
            while(it.hasNext()){
                Entry element = (Entry)it.next();
                params.append(element.getKey());
                params.append("=");
                params.append(element.getValue());
                params.append("&");
            }

            if(params.length() > 0){
                params.deleteCharAt(params.length()-1);
            }

            try{
                URL url = new URL(urlAddr);
                conn = (HttpURLConnection)url.openConnection();

                conn.setDoOutput(true);
                conn.setRequestMethod("POST");
                conn.setUseCaches(false);
                conn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
                conn.setRequestProperty("Content-Length", String.valueOf(params.length()));
                conn.setDoInput(true);
                conn.connect();

                OutputStreamWriter out = new OutputStreamWriter(conn.getOutputStream(), "UTF-8");
                out.write(params.toString());
                out.flush();
                out.close();

                int code = conn.getResponseCode();
                if (code != 200) {
                    System.out.println("ERROR===" + code);
                } else {
                    isSuccess = true;
                    System.out.println("Success!");
                }
            }catch(Exception ex){
                ex.printStackTrace();
            }finally{
                conn.disconnect();
            }
            return isSuccess;
    }
}