Question

请在下面找到我的代码段：

String[] attrIDs = {"title", "Depatrment", "DivisionDescription" };

SearchControls ctls = new SearchControls();
ctls.setReturningAttributes(attrIDs); 
ctls.setSearchScope(SearchControls.SUBTREE_SCOPE);

NamingEnumeration<SearchResult> answer = ctx.search(ldapServerSearchBase, FILTER, ctls);
SearchResult sr = (SearchResult) answer.next(); 
Attributes attrs = sr.getAttributes();

String str_title = attrs.get("title").toString();

String str_dept = null;
String str_desc = null;
if(str_title.equals("Professor"))
{
    str_dept = attrs.get("Depatrment").toString();
    str_desc = attrs.get("DivisionDescription").toString();
}
System.out.println(str_title);
System.out.println(str_dept);
System.out.println(str_desc);

当我运行此代码时，当我输出str_dept和str_desc时，它总是显示为null。但它确实正确显示str_title为＆＃34;教授＆＃34;。请帮助我理解这里可能出现的问题。

谢谢！

Answer 1

您确定要获取的属性是否存在？

str_dept = attrs.get("Depatrment").toString();
str_desc = attrs.get("DivisionDescription").toString();

首先，Depatrment拼错了，DivisionDescription很可能不存在（至少在大多数目录服务的默认原理图中都没有）。您可能需要以下属性吗？：

DivisionDescription =＆gt; division
Depatrment =＆gt; department

但是，请检查您的目录服务是否实际上拥有所请求的属性（并且用户实际上在这些属性中有一些值）。

Answer 2

虽然我确信，如果提供了更多信息，有更好的方法可以做到这一点，下面的示例应该可以帮助您：

String[] attrIDs = {"title", "Depatrment", "DivisionDescription" };

SearchControls ctls = new SearchControls();
ctls.setReturningAttributes(attrIDs); 
ctls.setSearchScope(SearchControls.SUBTREE_SCOPE);


NamingEnumeration<SearchResult> answer = ctx.search(ldapServerSearchBase, filter, ctls);
SearchResult sr = (SearchResult) answer.next(); 
Attributes attrs = sr.getAttributes();
String str_title=null;
String str_dept = null;
String str_desc = null;
if( attrs.get("title")!=null)
{
    str_title = attrs.get("title").toString();
    System.out.println(str_title);
    if(str_title.equals("Professor"))
    {
        str_dept = attrs.get("Depatrment").toString();
        str_desc = attrs.get("DivisionDescription").toString();
        System.out.println(str_dept);
        System.out.println(str_desc);
    }
}

-Jim

使用java从ldap服务器获取数据

2 个答案: