jquery - 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).

question from:https://stackoverflow.com/questions/18524524/passing-json-data-to-a-spring-mvc-controller

Answer 1

Add the following dependencies

<dependency>
    <groupId>org.codehaus.jackson</groupId> 
    <artifactId>jackson-mapper-asl</artifactId>
    <version>1.9.7</version>
</dependency>

<dependency>
    <groupId>org.codehaus.jackson</groupId> 
    <artifactId>jackson-core-asl</artifactId>
    <version>1.9.7</version>
</dependency>

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