Question

I am using JSTL and multiple check-boxes, i just want to checked some check-boxes by default

<form:checkboxes path="userName" items="${UserList}" id="userName" class="check-margin-top"/>

and I am doing like this

<form:checkboxes path="userName" items="${UserList}" id="userName"class="check-margin-top"
<c:forEach var='list' items="${UserList}"> 
<c:if test="${list == '1'}"checked="checked"></c:if>
</c:forEach>
></form:checkboxes>

And i am getting UserList like this { 4 = A,11 = DUMMY,9 = Test,5 = John Smith,6 = kp } i want to keep checked to 9 and 5 now what should i do ?

Answer 1

以下是您问题的答案。

为复选框值生成运行时列表，并将其链接到Spring的表单标记<form:checkboxes>

//SimpleFormController...
protected Map referenceData(HttpServletRequest request) throws Exception {

    Map referenceData = new HashMap();
    List<String> userList= new ArrayList<String>();
    webFrameworkList.add("John");
    webFrameworkList.add("Smith");
    webFrameworkList.add("Doe");
    webFrameworkList.add("Peter");
    referenceData.put("userList", userList);

    return referenceData;
}

默认选中... 如果要在默认情况下选中值为“John”和“Smith”的2个复选框，则可以使用值“John”和“Smith”初始化“favUser”属性。例如：

//SimpleFormController...
        @Override
protected Object formBackingObject(HttpServletRequest request)
    throws Exception {

    User user = new User();
    user .setFavUser(new String []{"John","Smith"});

    return user ;
}

User.java

public class User{

    String [] favUser;
    //getter & setter

}

你的复选框应该是

<form:checkboxes items="${userList}" path="favUser" />

请注意

<form:checkboxes items="${dynamic-list}" path="property-to-store" />

对于多个复选框，只要“path”或“property”值为等于任何“复选框值 - $ {dynamic-list}”，匹配复选框将自动检查。

来自https://www.mkyong.com/spring-mvc/spring-mvc-checkbox-and-checkboxes-example/

How do i set check-boxes checked on particular Value using JSTL?

1 个答案: