java开发接口利用http协议传输数据

来源：互联网发布：java heap size 编辑：程序博客网时间：2024/06/12 19:35
这个接口主要用来登录，java服务器提供一个接口，移动设备客户端（android和ios）能通过这个接口把用户名和密码之类的东东传过来到服务器验证，然后服务器返回数据告诉客户端是否登录成功。比如0是成功，1是失败。中间数据的传递都是通过http协议完成。。5.1请求程序代码public void sendMessage() throws Exception {       System.out.println("调用servlet开始=================");       StringBuffer sendStr = new StringBuffer();       sendStr.append("<?xml version=\"1.0\" encoding=\"UTF-8\"?>");       sendStr.append("<report_data>");       sendStr.append("<request_req>953943547334</request_req>");       sendStr.append("<request_time>2012040211394324</request_time>");       sendStr.append("<request_param>");       sendStr.append("<query_month>201203</query_month>");       sendStr.append("</request_param>");       sendStr.append("</report_data>");        BufferedReader reader = null;        try {           String strMessage = "";           StringBuffer buffer = new StringBuffer();            // 接报文的地址           URL uploadServlet = new URL(                  "http://localhost:9090/TestTransfers");            HttpURLConnection servletConnection = (HttpURLConnection) uploadServlet                  .openConnection();           // 设置连接参数           servletConnection.setRequestMethod("POST");           servletConnection.setDoOutput(true);           servletConnection.setDoInput(true);           servletConnection.setAllowUserInteraction(true);            // 开启流，写入XML数据           OutputStream output = servletConnection.getOutputStream();           System.out.println("发送的报文：");           System.out.println(sendStr.toString());            output.write(sendStr.toString().getBytes());           output.flush();           output.close();            // 获取返回的数据           InputStream inputStream = servletConnection.getInputStream();           reader = new BufferedReader(new InputStreamReader(inputStream));           while ((strMessage = reader.readLine()) != null) {              buffer.append(strMessage);           }            System.out.println("接收返回值:" + buffer);        } catch (java.net.ConnectException e) {           throw new Exception();       } finally {           if (reader != null) {              reader.close();           }        }    }5.2响应程序代码public class TestTransfers extends HttpServlet {     private static final long serialVersionUID = 1L;     protected void doGet(HttpServletRequest request,           HttpServletResponse response) throws ServletException, IOException {    }     protected void doPost(HttpServletRequest request,           HttpServletResponse response) throws ServletException, IOException {        //判断请求报文是否来自代维系统的ip地址       String ip = request.getRemoteHost();// 获取收到的报文        BufferedReader reader = request.getReader();         String line = "";        StringBuffer inputString = new StringBuffer();        while ((line = reader.readLine()) != null) {        inputString.append(line);        }               //如有必要，可以在报文中增加其他验证和加密的参数       //解析获取到的报文，根据ip地址、其他验证、加密等等来判断请求报文的服务器是否有权限             //如果请求验证合格，则根据请求的参数装配返回的报文        // 要返回的报文       StringBuffer resultBuffer = new StringBuffer();       resultBuffer.append("<?xml version=\"1.0\" encoding=\"UTF-8\"?>");       resultBuffer.append("<report_data>");       resultBuffer.append("<respon_req>953947334</respon_req>");       resultBuffer.append("<respon_time>20120402113943</respon_time>");       resultBuffer.append("<result>");       resultBuffer.append("<id>0000</id>");       resultBuffer.append("<comment>成功</comment>");       resultBuffer.append("</result>");       resultBuffer.append("<items>");       resultBuffer.append("<item>");       resultBuffer.append("<county>长治县</county>");       resultBuffer.append("<company>铁通</company>");       resultBuffer.append("<speciality>线路</speciality>");       resultBuffer.append("<personnel>王加和</personnel>");       resultBuffer.append("<begin_time>20120301000000</begin_time>");       resultBuffer.append("<end_time>20120331235959</end_time>");       resultBuffer.append("<plan_quantity>50</plan_quantity>");       resultBuffer.append("<checkout_quantity>40</checkout_quantity>");       resultBuffer.append("<patrol_rate>0.80</patrol_rate>");       resultBuffer.append("</item>");       //......       //......       //......       //循环组装响应的报文             resultBuffer.append("</items>");       resultBuffer.append("</report_data>");        // 设置发送报文的格式       response.setContentType("text/xml");       response.setCharacterEncoding("UTF-8");        PrintWriter out = response.getWriter();       out.println(resultBuffer.toString());       out.flush();       out.close();    }}
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