如何設置默認值在下拉空白連同物品標籤

Question

我想在下拉列表 此頁面加載爲空白默認值是我的JSP代碼：

<div class="ukjentFodselDato ${saksdetaljerForm.sak.personUnderVerge.ukjentFodselsDato ? '':'hidden'}"> 
     <label class="boldText"><spring:message code="common.label.fodsel.ar"/></label> 
     <input type="hidden" value="${sak.personUnderVerge.fodselAr}" /> 
     <form:select path="sak.personUnderVerge.fodselAr"> 
     <form:options items="${yearList}" /> 
     </form:select> 
    </div> 

java代碼：

 public static List<Integer> getYears(int range) { 
    int year = LocalDate.now().getYear(); 
    List<Integer> years = new ArrayList<>(); 
    for(int counter=0; counter < range; counter++) { 
     years.add(year); 
     year = year-1; 
    } 
    return years; 
    } 

Answer 1

<div class="ukjentFodselDato ${saksdetaljerForm.sak.personUnderVerge.ukjentFodselsDato ? '':'hidden'}"> 
     <label class="boldText"><spring:message code="common.label.fodsel.ar"/></label> 
     <input type="hidden" value="${sak.personUnderVerge.fodselAr}" /> 
    <form:select path="sak.personUnderVerge.fodselAr"> 
     <form:option value="" selected="${sak.personUnderVerge.fodselAr == null ? 'selected' : ''}" /> 
     <c:forEach var="year" items="${yearList}"> 
     <form:option value="${year}" selected="${parorende.fodselAr == year ? 'selected' : ''}" >${year}</form:option> 
     </c:forEach> 
    </form:select> 
</div>