passing JSON data to a Spring MVC controller

Question

I need to send a JSON string to Spring MVC controller But I do not  have any form bindings to it   I just need to send  a plain JSON data to Controller class I am making jQuery AJAX call to the Controller method like the below code     ajax        url     save       type   POST       data  JSON stringify array       dataType   json       contentType   application json  charset utf-8       success  function            alert  success                 But how do I retrieve it in the Controller method  Note  It is just plain JSON data and not a form submission

User · Answer

You can stringify the JSON Object with JSON.stringify(jsonObject) and receive it on controller as String.

In the Controller, you can use the javax.json to convert and manipulate this.

Download and add the .jar to the project libs and import the JsonObject.

To create an json object, you can use

JsonObjectBuilder job = Json.createObjectBuilder();
job.add("header1", foo1);
job.add("header2", foo2);
JsonObject json = job.build();

To read it from String, you can use

JsonReader jr = Json.createReader(new StringReader(jsonString));
JsonObject json = jsonReader.readObject();
jsonReader.close();

User · Answer

Add the following dependencies     lt dependency gt       lt groupId gt org codehaus jackson lt  groupId gt        lt artifactId gt jackson-mapper-asl lt  artifactId gt       lt version gt 1 9 7 lt  version gt   lt  dependency gt    lt dependency gt       lt groupId gt org codehaus jackson lt  groupId gt        lt artifactId gt jackson-core-asl lt  artifactId gt       lt version gt 1 9 7 lt  version gt   lt  dependency gt    Modify request as follows      ajax        url urlName          type  POST        contentType   application json  charset utf-8       data  jsonString    Stringified Json Object     async  false       Cross-domain requests and dataType   jsonp  requests do not support synchronous operation     cache  false       This will force requested pages not to be cached by the browser               processData false    To avoid making query String instead of JSON     success  function resposeJsonObject              Success Message Handler             Controller side     RequestMapping value   urlPattern   method   RequestMethod POST  public  ResponseBody Person save  RequestBody Person jsonString        Person person personService savedata jsonString      return person       RequestBody - Covert Json object to java   ResponseBody- convert Java object to json

User · Answer

Html      save   click function event                var jenis       jenis   val        var model       model   val        var harga       harga   val        var json      jenis    jenis   model    model   harga   harga         ajax           url   phone save           data  JSON stringify json           type   POST                      beforeSend  function xhr                xhr setRequestHeader  Accept    application json                xhr setRequestHeader  Content-Type    application json                       success  function data                alert data                          event preventDefault           Controller   Controller  RequestMapping value   phone   public class phoneController        phoneDao pd new phoneDao          RequestMapping value   save  method RequestMethod POST      public  ResponseBody     int save  RequestBody Smartphones phone                return pd save phone          Dao  public Integer save Smartphones i        int id   0      Session session HibernateUtil getSessionFactory   openSession        Transaction trans session beginTransaction        try           session save i              id i getId            trans commit              catch HibernateException he        return id

[json] passing JSON data to a Spring MVC controller

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