Spring MVC $.ajax does not specify ContentType, causing the background to not receive data

var formData = json.stringify (this.rows);  Convert data from a form to a string

$.ajax ({type:"Post", URL:'Http://localhost:8080/data', Data:formdata, DataType:"JSON", contentType:  "application/json;charset=utf-8"  , success:function (data) {}}); began to miss the Red property settings, resulting in the background is always unable to parse the data, can receive data, but very messy characters. 

$.ajax http://www.runoob.com/jquery/ajax-ajax.html has many properties to set

@RequestMapping (value ="/data", method =requestmethod.post) Public voidgetData (@RequestBody String str) throws ioexception{Org.codehaus.jackson.map.ObjectMapper mapper=NewOrg.codehaus.jackson.map.ObjectMapper (); Javatype Javatype= Mapper.gettypefactory (). Constructparametrictype (ArrayList.class, Testmodel.class); List<TestModel> list = (list<testmodel>) Mapper.readvalue (str, javatype); System. out. println (str); System. out. println (list); }

There is one more question unresolved:

    " /data ", method = requestmethod.post)    publicvoid getData (@RequestBody list< Testmodel> list)

Unable to receive data to list

Spring MVC $.ajax does not specify ContentType, causing the background to not receive data