A simple comparison between Application/json and application/x-www-form-urlencoded

application/x-www-form-urlencoded Submission Request Example

curl -X POST ‘http://localhost:8080/formPost‘ -d ‘id=1&name=foo&mobile=13612345678‘

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Corresponding service-side parsing parameters source code

//org.springframework.web.method.annotation.RequestParamMethodArgumentResolver#resolveNameif (arg == null) {   String[] paramValues = webRequest.getParameterValues(name); if (paramValues != null) { arg = paramValues.length == 1 ? paramValues[0] : paramValues; }}

Application/json Submission Request Example

curl -X POST -H "Content-Type: application/json" ‘http://localhost:8080/jsonPost‘ -d ‘{"id":2,"name":"foo","mobile":"13656635451"}‘

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Corresponding service-side parsing parameters source code

Com.alibaba.fastjson.support.spring.FastJsonHttpMessageConverter#readInternalProtected Object readinternal (class<? extends Object> Clazz, Httpinputmessage inputmessage) throws IOException, httpmessagenotreadableexception {BytearrayoutputstreamBAOs = newBytearrayoutputstream (); InputStream in = Inputmessage.getbody ();Byte[]BUF = newbyte[1024]; while (true) {int bytes = in.read (buf); if (bytes = =-1) { byte[] bytes1 = Baos.tobytearray (); return Json.parseobject (bytes1,  0, Bytes1.length, This.charset.newDecoder (), Clazz, new feature[0]);} if (bytes > 0) { baos.write (buf, 0, bytes);      }}} 

Mixed-use examples

Web Layer Code

    @RequestMapping(value="/mixPost", method=RequestMethod.POST )    public Result<Void> mixPostTest(@RequestBody @Valid Foo foo, @RequestParam Integer sex)

Submit Request

curl -X POST -H "Content-Type: application/json" ‘http://localhost:8080/mixPost?sex=1‘ -d ‘{"id":2,"name":"foo","mobile":"13656635451"}‘

Add--How to locate the corresponding source code to find the POST request parsing parameters source code

    @RequestMapping(value="/formPost", method=RequestMethod.POST )    public Result<Void> formPostTest(@RequestParam int id, @RequestParam String name, @RequestParam String mobile)

Because the ID is a required parameter if the request parameter does not contain an ID, the error will be as follows

Org. springframework. Web. bind. missingservletrequestparameterexception:required int parameter' ID ' is not present at Org. springframework. Web. method. annotation. Requestparammethodargumentresolver. Handlemissingvalue (Requestparammethodargumentresolver. Java:255) at Org. springframework. Web. method. annotation. Abstractnamedvaluemethodargumentresolver. Resolveargument (Abstractnamedvaluemethodargumentresolver. Java:) at Org. springframework. Web. method. Support. Handlermethodargumentresolvercomposite. Resolveargument (Handlermethodargumentresolvercomposite. Java: +) at org. springframework. Web. Method. Invocablehandlermethod. Getmethodargumentvalues (Invocablehandlermethod. Java:157) at Org. Springframework. Web. Method. Invocablehandlermethod. Invokeforrequest (Invocablehandlermethod. Java:124)   

This method can be used to quickly locate the source code

Source code for JSON request parsing parameters found

    @RequestMapping(value="/jsonPost", method=RequestMethod.POST )    public Result<Void> jsonPostTest(@RequestBody @Valid Foo foo)

Because it is necessary to construct an empty Foo object before you can inject each property value so add a breakpoint in the non-parametric constructor of Foo, you can locate the source code of the JSON request parsing parameters

Reprinted: 1190000007252829

A simple comparison between Application/json and application/x-www-form-urlencoded