Question

java开发接口利用http协议传输数据

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。。。这个接口该怎么去写啊？。。。求高手帮忙。。。有源码什么的最好了。。。

Answer 1

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();
}
}

追问

代码好详细啊，上面那个5.1请求程序代码是写到一个哪里的？客户端吗？

Answer 2

你说的是 webservice 还是 类似网关程序一样的服务器web，没明白你想要的是什么