String currname = "";    //提交的用户名
        String currpwd = "";    //提交的秘密
        
        //post的数据，其中的Username 和 Password 是表单上input的name属性名，大小写必须一致
        String postdata = "Username=" + URLEncoder.encode(currname,"utf-8") +"&Password=" + URLEncoder.encode(currpwd, "utf-8");
        
        URL url = new URL("http://localhost/xxx/names.nsf?Login"); //提交的地址
        
        //STEP.1.建立连接
        HttpURLConnection con = (HttpURLConnection) url.openConnection();
        con.setRequestMethod("POST");    //设置方法为Post
        
        //STEP.2.设置Cookie 根据你的js做的
        con.setRequestProperty("Cookie", "A="+currname+"; B="+currpwd+"; LastVisitUserName=" + currname +";");
        
        //STEP.3.发送post数据
        BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(con.getOutputStream()));
        writer.write(postdata);
        writer.flush();
        writer.close();
        
        //STEP.4.获取返回数据
        BufferedReader reader = new BufferedReader(new InputStreamReader(con.getInputStream()));
        String line;
        while ((line = reader.readLine()) != null) {
            System.out.println(line);
        }
        reader.close();
        
        con.disconnect();