无法使用LDAP连接从Java后端检索Active Directory用户[LDAP:错误代码32 -没有此类对象]

String filter = "(&(objectClass=user)(sAMAccountName=username))";

String baseDN = "DC=example,DC=com";

import javax.naming.Context;
import javax.naming.NamingException;
import javax.naming.directory.DirContext;
import javax.naming.directory.InitialDirContext;
import java.util.Hashtable;

public class LDAPTest {
    public static void main(String[] args) {
        Hashtable<String, String> env = new Hashtable<>();
        env.put(Context.INITIAL_CONTEXT_FACTORY, "com.sun.jndi.ldap.LdapCtxFactory");
        env.put(Context.PROVIDER_URL, "ldap://your-ldap-server:389");
        env.put(Context.SECURITY_AUTHENTICATION, "simple");
        env.put(Context.SECURITY_PRINCIPAL, "your-username@your-domain");
        env.put(Context.SECURITY_CREDENTIALS, "your-password");

        try {
            DirContext ctx = new InitialDirContext(env);
            String filter = "(&(objectClass=user)(sAMAccountName=username))";
            String baseDN = "DC=example,DC=com";
            NamingEnumeration<SearchResult> results = ctx.search(baseDN, filter, null);
            
            if (results.hasMore()) {
                SearchResult searchResult = results.next();
                Attributes attributes = searchResult.getAttributes();
                // 处理属性...
            } else {
                System.out.println("No such object found.");
            }
        } catch (NamingException e) {
            e.printStackTrace();
        }
    }
}