Tạo restful service như sau
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| @Path("product")public class Product { @Context private UriInfo context; /** Creates a new instance of Product */ public Product() { } @GET @Path("/{id}") @Produces("application/json") public String getJson(@PathParam("id") int id, @QueryParam("name")String name) { try { JSONObject json = new JSONObject(); json.put("id", id); json.put("name", name); return json.toString(); } catch (Exception e) { return ""; } } @POST @Produces("application/json") public String postJson(@FormParam("id") int id, @FormParam("name")String name) { try { JSONObject json = new JSONObject(); json.put("id", id); json.put("name", name); return json.toString(); } catch (Exception e) { return ""; } }} |
Sử dụng thư viện Java kết nối và gọi dịch vụ
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| public class JavaApplication1 { public static void main(String[] args) { postData(address); getData(address); } public static void getData(String address) { try { // cho nguoi dung nhap lieu System.out.print("Input id:"); Scanner sn = new Scanner(System.in); address += "/" + URLEncoder.encode(sn.nextLine(),"UTF8"); System.out.print("Input name:"); address += "?name=" + URLEncoder.encode(sn.nextLine(),"UTF8"); // goi yeu cau theo pp get URL url = new URL(address); HttpURLConnection conn = (HttpURLConnection) url.openConnection(); conn.setRequestProperty("Accept-Charset", "UTF-8"); // nhan du lieu InputStream response = conn.getInputStream(); // xu ly du lieu tra ve StringBuilder sb = new StringBuilder(); for (int c; (c = response.read()) >= 0;) { sb.append((char) c); } System.out.println("Recieve data with get method:" + sb.toString()); } catch (Exception e) { System.out.println("Err:" + e.toString()); } } public static void postData(String address) { try { // ket noi voi server URL url = new URL(address); HttpURLConnection conn = (HttpURLConnection) url.openConnection(); conn.setRequestProperty("Accept-Charset", "UTF-8"); // tao cac tham so se goi len server Map<String, Object> params = new LinkedHashMap<String, Object>(); System.out.print("Input id:"); Scanner sn = new Scanner(System.in); params.put("id", sn.nextLine()); System.out.print("Input name:"); params.put("name", sn.nextLine()); // ghep tham so StringBuilder postData = new StringBuilder(); for (Map.Entry<String, Object> param : params.entrySet()) { if (postData.length() != 0) { postData.append('&'); } postData.append(URLEncoder.encode(param.getKey(), "UTF-8")); postData.append('='); postData.append(URLEncoder.encode(String.valueOf(param.getValue()), "UTF-8")); } byte[] postDataBytes = postData.toString().getBytes("UTF-8"); // ghi du lieu len server (submit) conn.setDoOutput(true); conn.getOutputStream().write(postDataBytes); // nhan du lieu InputStream response = conn.getInputStream(); StringBuilder sb = new StringBuilder(); for (int c; (c = response.read()) >= 0;) { sb.append((char) c); } System.out.println("Recieve data with post method:" + sb.toString()); } catch (Exception e) { System.out.println("Err:" + e.toString()); } }} |
Mã nguồn ==> ma nguon
