java - Accepting / returning XML/JSON request and response - Spring MVC -

i need write rest service accepts xml/json input (post method) , xml/json output (based on input format). have tried below approach achieve doesn't helped out.endpoint method accepts both xml/json while responding gives either json or xml based on order specified in @requestmapping -produces.any appreciated.

my endpoint method:

@requestmapping(value = "/getxmljson", method = requestmethod.post,produces={"application/json","application/xml"},         consumes={"application/json", "application/xml"}) public @responsebody student processxmljsonrequest(@requestbody student student)         throws exception {     system.out.println("*************inside controller");     return student; } 

pojo class: student.java

import java.io.serializable; import java.util.arraylist;  import javax.xml.bind.annotation.xmlelement; import javax.xml.bind.annotation.xmlrootelement; import javax.xml.bind.annotation.xmltype;  import com.fasterxml.jackson.annotation.jsonignore; import com.fasterxml.jackson.annotation.jsonpropertyorder;  @xmlrootelement(name = "student") @xmltype(proporder = {"id", "name", "graduationtime", "courses"}) @jsonpropertyorder({"id", "name", "graduationtime", "courses"}) public class student implements serializable {     private static final long serialversionuid = 1l;      private int id;     private string name;     private string graduationtime;     private arraylist<course> courses = new arraylist<course>();      @xmlelement     public int getid() { return id; }     @xmlelement     public string getname() { return name; }     @xmlelement     public string getgraduationtime() { return graduationtime; }     @xmlelement     public arraylist<course> getcourses() { return courses; }      public void setid(int value) { this.id = value; }     public void setname(string value) { this.name = value; }     public void setgraduationtime(string value) { this.graduationtime = value; }     public void setcourses(arraylist<course> value) { this.courses = value; }      @jsonignore     public string tostring() {         return this.name + " - "                 + graduationtime == null? "unknown" : graduationtime.tostring();     }      public student() {}     public student(int id, string name, string graduationtime) {         this.id = id;         this.name = name;         this.graduationtime = graduationtime;     } } 

pojo class: course.java

import java.io.serializable;  import javax.xml.bind.annotation.xmlelement; import javax.xml.bind.annotation.xmlrootelement; import javax.xml.bind.annotation.xmltype;  import com.fasterxml.jackson.annotation.jsonpropertyorder;  @xmlrootelement(name = "course") @xmltype(proporder = {"coursename", "score"}) @jsonpropertyorder({"coursename", "score"}) public class course implements serializable {     private static final long serialversionuid = 1l;      private string coursename;     private integer score;      public @xmlelement string getcoursename() { return coursename; }     public @xmlelement integer getscore() { return score; }      public void setcoursename(string value) { coursename = value; }     public void setscore(integer value) { score = value; }      public course() {}     public course(string coursename, integer score) {         this.coursename = coursename;         this.score = score;     } } 

spring-config.xml

<?xml version="1.0" encoding="utf-8"?> <beans:beans xmlns="http://www.springframework.org/schema/mvc"     xmlns:xsi="http://www.w3.org/2001/xmlschema-instance" xmlns:beans="http://www.springframework.org/schema/beans"     xmlns:context="http://www.springframework.org/schema/context"     xmlns:sws="http://www.springframework.org/schema/web-services"     xmlns:jee="http://www.springframework.org/schema/jee" xmlns:oxm="http://www.springframework.org/schema/oxm"     xmlns:util="http://www.springframework.org/schema/util"     xsi:schemalocation="http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd             http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd             http://www.springframework.org/schema/web-services         http://www.springframework.org/schema/web-services/web-services-2.0.xsd             http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd             http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee-4.0.xsd        http://www.springframework.org/schema/oxm http://www.springframework.org/schema/oxm/spring-oxm-4.0.xsd        http://www.springframework.org/schema/util             http://www.springframework.org/schema/util/spring-util-2.5.xsd">      <!-- dispatcherservlet context: defines servlet's request-processing          infrastructure -->      <!-- enables spring mvc @controller programming model -->     <annotation-driven />      <!-- handles http requests /resources/** efficiently serving          static resources in ${webapproot}/resources directory -->     <resources mapping="/resources/**" location="/resources/" />      <!-- configure plugin json request , response in method handler -->     <beans:bean         class="org.springframework.web.servlet.mvc.method.annotation.requestmappinghandleradapter">         <beans:property name="messageconverters">             <beans:list>                 <beans:ref bean="jsonmessageconverter" />                 <beans:ref bean="xmlmessageconverter" />             </beans:list>         </beans:property>     </beans:bean>      <!-- configure bean convert json pojo , vice versa -->     <beans:bean id="jsonmessageconverter"         class="org.springframework.http.converter.json.mappingjackson2httpmessageconverter">     </beans:bean>      <beans:bean id="xmlmessageconverter"         class="org.springframework.http.converter.xml.jaxb2rootelementhttpmessageconverter">     </beans:bean>      <beans:bean id="resttemplate" class="org.springframework.web.client.resttemplate">      </beans:bean>      <beans:bean id="objectmapper" class="com.fasterxml.jackson.databind.objectmapper" />     <context:component-scan base-package="com.test" />  </beans:beans> 

json input:

{ "id":2014, "name":"test", "graduationtime":"09/05/2014", "courses":[ { "coursename":"math", "score":150 }, { "coursename":"che", "score":150 } ] } 

xml input:

<?xml version="1.0" encoding="utf-8" ?> <student> <id>2014</id> <name>test</name> <graduationtime>09/05/2014</graduationtime> <courses>     <coursename>math</coursename>     <score>150</score> </courses> <courses>     <coursename>che</coursename>     <score>150</score> </courses> </student> 

the best practice handling different data formats same controller let framework work of figuring out marshalling , unmarshalling mechanisms.

step 1: use minimal controller configuration

@requestmapping(value = "/getxmljson", method = requestmethod.post) @responsebody public student processxmljsonrequest(@requestbody student student) {   return student; } 

there no need specify consumes , produces here. example, consider may want same method handle other formats in future such google protocol buffers, edi, etc. keeping controllers free of consumes , produces let add data formats through global configuration instead of having modify controller code.

step 2: use contentnegotiatingviewresolver instead of requestmappinghandleradapter

  <bean class="org.springframework.web.servlet.view.contentnegotiatingviewresolver">     <property name="defaultviews">       <list>         <bean class="org.springframework.web.servlet.view.json.mappingjackson2jsonview"/>       </list>     </property>   </bean> 

let view resolver decide how read incoming data , how write back.

step 3: use accepts , content-type http headers

hitting controller correct http header values force contentnegotiatingviewresolver marshal , unmarshal data automatically using appropriate data representations.

if want exchange data in json format, set both headers application/json. if want xml instead, set both application/xml.

if not want use http headers (which ideally should), can add .json or .xml url , contentnegotiatingviewresolver rest.

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you can check out my sample app created using code snippets works fine json , xml.