字符串匹配并用json格式的webservice数据签入jsp

Question

在我的 jsp 应用程序中，我调用了一个 Web 服务，我从中获取 json fromat 中的数据，如下所示

获取json数据的代码是

 String recv ="";
 String recvbuff ="";
 URL jsonpage = new URL("http://107.109.6.236:3000/api/tokens.json");
 URLConnection urlcon = jsonpage.openConnection();
 BufferedReader buffread = new BufferedReader(new InputStreamReader(urlcon.getInputStream()));

 while ((recv = buffread.readLine()) != null)
 recvbuff += recv;
 buffread.close();

下面是recvbuff输出。

[{"id":1,"session_id":"11611fba0cd57f2f0e62acf746d7f60b","link":"","created_at":"2013- 12-10T13:13:31.000Z","updated_at":"2013-12-10T13:13:31.000Z"}, 
{"id":2,"session_id":"848960680b00502fc3e4c9cf0652a5fe","link":"","created_at":"2013-12-10T13:13:31.000Z","updated_at":"2013-12-10T13:13:31.000Z"},
{"id":3,"session_id":"101155b2c4cef0034804ed9b6806422e","link":"","created_at":"2013-12-10T13:13:31.000Z","updated_at":"2013-12-10T13:13:31.000Z"},
{"id":4,"session_id":"ec1373a7bdd291f60266ab6f8445c23b","link":"","created_at":"2013-12-10T13:13:31.000Z","updated_at":"2013-12-10T13:13:31.000Z"},
{"id":5,"session_id":"3eb8b185f0cbd71ff004b30453c90f54","link":"","created_at":"2013-12-10T13:13:31.000Z","updated_at":"2013-12-10T13:13:31.000Z"}]

我有一个 token_id，例如 3eb8b185f0cbd71ff004b30453c90f54，它将与 session_id 之一匹配。如果与确切的字符串不匹配，它将重定向到错误页面。

为此，我使用以下代码。

if(recvbuff.contains(token_id)){
 out.println("<br>Hello <b>"+token_id+"</b>! done"); 
 }else{
  response.sendRedirect(redirectURL);
}

如何在jsp页面中得到精确匹配？

Answer 1

尝试这样的事情（写在 scriplets 中作为它的 jsp 页面）：

  String ar = "[{\"id\":1,\"session_id\":\"11611fba0cd57f2f0e62acf746d7f60b\",\"link\":\"\",\"created_at\":\"2013- 12-10T13:13:31.000Z\",\"updated_at\":\"2013-12-10T13:13:31.000Z\"}, \n"
                + "{\"id\":2,\"session_id\":\"848960680b00502fc3e4c9cf0652a5fe\",\"link\":\"\",\"created_at\":\"2013-12-10T13:13:31.000Z\",\"updated_at\":\"2013-12-10T13:13:31.000Z\"},\n"
                + "{\"id\":3,\"session_id\":\"101155b2c4cef0034804ed9b6806422e\",\"link\":\"\",\"created_at\":\"2013-12-10T13:13:31.000Z\",\"updated_at\":\"2013-12-10T13:13:31.000Z\"},\n"
                + "{\"id\":4,\"session_id\":\"ec1373a7bdd291f60266ab6f8445c23b\",\"link\":\"\",\"created_at\":\"2013-12-10T13:13:31.000Z\",\"updated_at\":\"2013-12-10T13:13:31.000Z\"},\n"
                + "{\"id\":5,\"session_id\":\"3eb8b185f0cbd71ff004b30453c90f54\",\"link\":\"\",\"created_at\":\"2013-12-10T13:13:31.000Z\",\"updated_at\":\"2013-12-10T13:13:31.000Z\"}]";

        String token_id = "3eb8b185f0cbd71ff004b30453c90f54";
        JSONArray jsonArray = new JSONArray(ar);
        boolean match_found = false;
        o:
        for (int i = 0; i < jsonArray.length(); i++) {
            if (token_id.equals(jsonArray.getJSONObject(i).getString("session_id"))) {
                match_found = true;
                break o;
            }
        }
        if(match_found  == true)
        {
            response.sendRedirect("error.jsp");
        }