springmvc converter doesnot work - spring

Question

I need convert string to enum. I wish I could post a String parameter ,and receive as an enum, but I got a 415 error.Here is my code
Email.java
public class Email {
private String address;
private String subject;
private String content;
private ServiceType service;
public enum ServiceType {
Feedback, PrivatePolicy, TermsOfUse, MotionDetection;
public static ServiceType get(String type) {
for (ServiceType servicetype : values()) {
if (servicetype.toString().equals(type)) {
return servicetype;
}
}
return null;
}
}
}
StringToEnumConverter uesed to convert string to enum
#SuppressWarnings("rawtypes")
public class StringToEnumConverter implements ConverterFactory<String, Enum> {
#SuppressWarnings({ "unchecked" })
#Override
public <T extends Enum> Converter<String, T> getConverter(Class<T> targetType) {
// TODO Auto-generated method stub
return new StringToEnum(targetType);
}
private class StringToEnum<T extends Enum> implements Converter<String, T> {
private final Class<T> enumType;
public StringToEnum(Class<T> enumType) {
this.enumType = enumType;
}
#SuppressWarnings("unchecked")
public T convert(String source) {
if (source.length() == 0) {
return null;
}
return (T) Enum.valueOf(this.enumType, source.trim());
}
}
}
xml inject the converter
<mvc:annotation-driven conversion-service="conversionService" />
<bean id="conversionService"class="org.springframework.format.support.FormattingConversionServiceFactoryBean">
<property name="converters">
<set>
<bean class="com.xxx.xxx.utils.StringToEnumConverter" />
</set>
</property>
</bean>
front-end code
$(".test").click(function(){
$(".response-text").html("please wait....");
var postData = {
"address" : $(".email").val(),
"subject" : $(".subject").val(),
"content" : $(".content").val(),
"service" : $(".service").val()
}
var args = {
url: "XXX/emailService_v1.0",
contentType : "application/x-www-form-urlencoded;charset=UTF-8",
type: "post",
data: postData,
success : function(response, currentAjaxOptions){
var str = JSON.stringify(response);
$(".response-text").html(str);
}
}
$.xAjax(args);
});
controller
#RequestMapping(value = "/emailService_v1.0", method = RequestMethod.POST)
#ResponseBody
public JSONObject emailService(#Valid #RequestBody Email email,
BindingResult result) throws Exception {
System.out.println("come in....");
if (result.hasErrors()) {
return genResJsonFromError(result);
} else {
System.out.println(email.getAddress());
JSONObject resJson = emailService.sendEmail(email);
System.out.println(email.getService().toString());
return resJson;
}
}
I just found the StringToEnumConverter.java wan't invoked.
so it give me 415 Unsupported Media Type error.
Wish anyone can help me
Then I add
#Resource(name = "conversionService")
private ConversionService conversionService;
#InitBinder
public void initBinder(DataBinder binder) {
binder.setConversionService(conversionService);
}
in my controller, but it does not work either.