處理和服務一個Json請求
處理一個Json請求
1、在UserControl.java中添加
//json使用 @BodyParser.Of(BodyParser.Json.class) public static Result sayHello() { JsonNode json = request().body().asJson(); String name = json.findPath("name").getTextValue(); if(name == null) { return badRequest("Missing parameter [name]"); } else { return ok("Hello " + name); } }
BodyParser是讓play去把body直接轉換為json
2、在routes中添加
POST /sayHello controllers.UserControl.sayHello()
3、開啟form.scala.html
添加<script type="text/javascript" src="@routes.Assets.at("javascripts/jquery-1.9.0.min.js")"></script>
同時在routes中添加 GET /assets/*file controllers.Assets.at(path="/public", file)
注意看public\javascripts\中jquery是否是jquery-1.9.0.min.js，根據自己檔案名稱
form.scala.html檔案
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><title>Insert title here</title><script type="text/javascript" src="@routes.Assets.at("javascripts/jquery-1.9.0.min.js")"></script><script type="text/javascript">$(document).ready(function(){ $("#b01").click(function(){ $.ajax({ type:'post', url:'@routes.UserControl.sayHello', contentType:'application/json', data:'{"name": "Json"}', success:function(msg){ $("#myDiv").html(msg); }, error:function(msg){ alert(msg.statusText); } }); }); });</script></head><body> <input type="button" id="b01" value="testJson" > <div id="myDiv"> 顯示區 </div> <form action="/register" method="post"> ID:<input type="text" id="id" name="id"/> Name:<input type="text" id="name" name="name"/> <input type="submit" value="submit"/> </form></body></html>
用Json作為回應
sayHello方法改為
//json使用 @BodyParser.Of(BodyParser.Json.class) public static Result sayHello() { JsonNode json = request().body().asJson(); String name = json.findPath("name").getTextValue(); ObjectNode result=Json.newObject(); result.put("stauts","OK"); result.put("name", name); if(name == null) { return badRequest("Missing parameter [name]"); } else { return ok(result.toString()); } }
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