Spring how to use select with Thymeleaf [duplicate] - spring

Question

I want to create a drop down menu that allows a client to search users by a field specified in the drop down menu. For example, search by state, search by city, etc.
This is what I have so far:
<p>Search options:</p>
<form action="#" th:action="#{/get/{value}" method="get">
<select>
<option th:value="AllUsers">Search all users</option>
<option th:value="ByUsername">Search by user name</option>
<option th:value="ByFirstname">Search by first name</option>
<option th:value="ByLastname">Search by last name</option>
<option th:value="ByAddress">Search by address</option>
<option th:value="ByCity">Search by city</option>
<option th:value="ByState">Search by state</option>
<option th:value="ByZipCode">Search by zip code</option>
<option th:value="ByPhoneNumber">Search by phone number</option>
<option th:value="ByEmail">Search by email</option>
</select>
<input type="text" th:field="value" name="searchField"/>
<input type="submit" value="Search" name="searchButton"/>
</form>
I'm just not sure how to connect the action and the value tag of the currently selected item in the drop down list to specify the URI. If a user selects, search by state, and he enters in "Maryland", how do I specify the corresponding URI tag?
This would be my method in Spring that executes the action:
#RequestMapping(value = "/get/ByState", method = RequestMethod.GET)
public String getByState() {
// ...
}
#RequestMapping(value = "/get/ByCity", method = RequestMethod.GET)
public String getByCity() {
// ...
}

Answer 1

Because the accepted answer is not using Thymeleaf and this question is top in Google I'm adding my solution here.
In my situation statues is a list of Enum values. Model attribute is populated as usually you do in Spring:
mav.addObject("statuses", EnumSet.allOf(Status.class));
Group has a filed of type Status (the enum).
<div class="form-group row">
<select class="form-control" id="status" name="status">
<option th:each="stat : ${statuses}"
th:value="${stat}"
th:text="${stat}"
th:selected="${stat.equals(group.status)}"/>
</select>
</div>
This automatically populates the list and selects value that is selected in my Group instance:

Answer 2

You have just the required answer in this link:
http://fruzenshtein.com/spring-mvc-form-select-tag/