使用java从ldap服务器获取数据

Question

请在下面找到我的代码片段：

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);  

当我运行这段代码时，当我输出str_dept和str_desc时，它总是显示null。但它确实正确地将str_title显示为“Professor”。 请帮助我了解这里可能出现的问题

谢谢

Answer 1

您确定要获取的属性确实存在吗

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

首先，Depatrment拼写错误，而且DivisionDescription很可能不存在（至少在大多数目录服务的默认示意图中不存在）。可能您需要以下属性？：

• DivisionDescription=>division
• Depatrment=>department

但是，请检查您的目录服务是否确实包含请求的属性（并且用户在这些属性中确实有一些值）

Answer 2

虽然我相信，如果提供更多信息，有更好的方法来做到这一点，但下面的例子应该会让你上路：

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);
    }
}

-吉姆