How can I create Java web service (jax-ws) with array or List as a parameter

Question

I've got a problem with a web service which has an array or List as parameter. Here is example:

@WebMethod
public String printList(@WebParam(name = "list") List<String> list) {
    String result = "";
    if(list == null) {
        result = "list is null";
    } else if(list.size() == 0) {
        result = "list is empty";
    } else {
        for(String elem : list) {
            result += elem + " ";
        }
    }
    return result;
}

When I call printList from web service client the result is always "list is empty" The same is when I use array of String. Should I use some additional annotations or something?

Answer 1

Your code is perfect , it seems you are calling it wrong way,

and you can remove second condition directly second else will work

Answer 2

JAX Webservice 中的数组数据类型不支持，所以你需要使用库和工具来做这样的事情......