Request method 'GET' not supported Spring MVC

Request method 'GET' not supported Spring MVC

I have the following code in the controller
private static final String CJOB_MODEL = "cJobNms";
@RequestMapping(value = MAIN_VIEW, method = RequestMethod.POST)
public String showTestXsd(//@ModelAttribute(FORM_MODEL) TestXsdForm
xsdForm,
//@ModelAttribute(MODEL) @Valid
//TestXsdTable testXsdTable,
@RequestParam String selected,
Model model) throws DataException {
String cJobNm =null;
List<String> cJobNmList = null;
System.out.println("selected:"+ selected);
String xsdView = testXsdService.getXsdString();
cJobNmList = testXsdService.getCJobNm();
Set<String> cJobNmSet = new HashSet<String>(cJobNmList);
TestXsdForm xsdForm = new TestXsdForm();
model.addAttribute("xsdView", xsdView);
model.addAttribute("xsdFormModel", xsdForm);
model.addAttribute(CJOB_MODEL, cJobNmSet);
xsdForm.setXsdString(xsdView);
return MAIN_VIEW;
}
And the following code in my jsp.
<form:form modelAttribute="testXsdTable" name="xsdForm"
action="/xsdtest/testXsdTables"
id="xsdForm" method="POST" class="form"
enctype="multipart/form-data" >
<tr>
<td>
<label for="cJobs" class="fieldlabel">Jobs:</label>
<select id="cJobs" name="cJobs" >
<option value="${selected}" selected>${selected}</option>
<c:forEach items="${cJobNms}" var="table">
<c:if test="${table != selected}">
<option value="${table}">${table}</option>
</c:if>
</c:forEach>
</select>
</td>
</tr>
<pre>
<c:out value="${xsdForm.xsdString}"/>
</pre>
<div class="confirmbuttons">
<a href="#"class="button positive" id="saveXsdButton"
onclick="saveTestXsd();">
<span class="confirm">Save</span>
</a>
</div>
When the user selects an option from the cJobNms list the selected value
should be displayed in the controller method showTestXsd. Please let me
know what I am doing wrong.
Currently I am getting a message : Request method 'GET' not supported