使用 JAVA 从 LDAP 获取用户信息 [英] Getting user info from LDAP by using JAVA

问题描述

对于 LDAP，我使用 LDAP 测试服务器，即 Forumsys，我们可以在 the

For LDAP, I use LDAP test server namely as Forumsys and we can see users and groups of Forumsys LDAP in the link.

我想从他们的群组中获取用户的信息.我在 JAVA 上观看了一些有关 LDAP 的视频并尝试这样做.但是，我无法得到它们.我的代码返回空值.

I want to get users' info from their groups. I watched some videos about LDAP on JAVA and tried to do. However, I cannot get them. My code returns null.

我该如何解决?获取用户和群组信息的问题在哪里?

How can I solve it? Where is my problem in getting the users' and groups' information?

这是我的代码:

import javax.naming.*;
import javax.naming.directory.*;

import java.util.Hashtable;



public class LDAPV2 {
    public static void main(String[] args) throws NamingException{
        Hashtable <String,String> env = new Hashtable<>();
        env.put(Context.INITIAL_CONTEXT_FACTORY,"com.sun.jndi.ldap.LdapCtxFactory");
        env.put(Context.PROVIDER_URL,"ldap://ldap.forumsys.com:389/dc=example,dc=com");
        env.put(Context.SECURITY_AUTHENTICATION, "simple");
        env.put(Context.SECURITY_PRINCIPAL, "uid=boyle,dc=example,dc=com");
        env.put(Context.SECURITY_CREDENTIALS, "password");

        DirContext context = new InitialDirContext(env);
        DirContext groupCx = (DirContext) context.lookup("ou=chemists");


        NamingEnumeration <Binding> groups = groupCx.listBindings("");
        while (groups.hasMore()){
            String bindingName = groups.next().getName();
            Attributes groupAttributes = groupCx.getAttributes(bindingName);
            Attribute groupName=groupAttributes.get("cn");
            System.out.println(groupName);
        }
    }
}

推荐答案

ou=chemists 在您查找的目录中为空.所以它没有子绑定，所以 while 循环永远不会执行.

ou=chemists is empty in the directory you're looking up. So it has no child bindings, so the while loop never executes.

但是它确实有一些属性，您可以使用这些属性进行打印:

It does however have some attributes, which you can print with:

    Attributes groupAttributes = groupCx.getAttributes("");
    Attribute groupName = groupAttributes.get("uniqueMember");
    System.out.println(groupName);

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