import java.util.Hashtable;import javax.naming.Context;import javax.naming.NamingEnumeration;import javax.naming.ldap.InitialLdapContext;import javax.naming.ldap.LdapContext; public class LdapAuth {                 private String domain;         private String ldapHost;         private String searchBase;                 public LdapAuth(){                   this.domain = "${domain}";                   this.ldapHost = "ldap://${IP}:${PORT}";                   this.searchBase = "DC=${DC1},DC=${DC2}";         }                 public LdapAuth(String domain,String host,String dn){                   this.domain = domain;                   this.ldapHost = host;                   this.searchBase = dn;         }                 public boolean authLdap(String username,String pass){                                     String searchFilter = "(&(objectClass=user)(sAMAccountName=" + username + "))";                   Hashtable env = new Hashtable();                                     env.put(Context.INITIAL_CONTEXT_FACTORY,"com.sun.jndi.ldap.LdapCtxFactory");                                     env.put(Context.PROVIDER_URL, ldapHost);        env.put(Context.SECURITY_AUTHENTICATION, "simple");        env.put(Context.SECURITY_PRINCIPAL, username + "@" + domain);        env.put(Context.SECURITY_CREDENTIALS, pass);               LdapContext ctxGC = null;        boolean ldapUser = false;        try {                            ctxGC = new InitialLdapContext(env,null);                            NamingEnumeration answer = ctxGC.search(searchBase, searchFilter,null);                                                       if (answer!=null) {                                     ldapUser = true;                            }                   } catch (Exception e) {                            // TODO: handle exception                   }                                     return ldapUser;         }

测试：

用户名密码正确：