在java中创建动态组查询

import javax.naming.Context;
import javax.naming.NamingEnumeration;
import javax.naming.directory.*;
import java.util.Hashtable;

Hashtable<String, String> env = new Hashtable<>();
env.put(Context.INITIAL_CONTEXT_FACTORY, "com.sun.jndi.ldap.LdapCtxFactory");
env.put(Context.PROVIDER_URL, "ldap://ldap.example.com:389");
env.put(Context.SECURITY_AUTHENTICATION, "simple");
env.put(Context.SECURITY_PRINCIPAL, "cn=admin,dc=example,dc=com");
env.put(Context.SECURITY_CREDENTIALS, "password");

DirContext ctx = new InitialDirContext(env);

String baseDN = "ou=users,dc=example,dc=com";
String filter = "(&(objectClass=person)(memberOf=cn=groupname,ou=groups,dc=example,dc=com))";
SearchControls controls = new SearchControls();
controls.setSearchScope(SearchControls.SUBTREE_SCOPE);

NamingEnumeration<SearchResult> results = ctx.search(baseDN, filter, controls);

while (results.hasMore()) {
    SearchResult result = results.next();
    Attributes attrs = result.getAttributes();
    
    // 处理查询结果
    // 可以获取用户的属性信息，如姓名、邮箱等
}

ctx.close();