通过java.namming包实现LDAP用户登录认证，怎么区分账号被冻结、停用、不存在等异常的业务情况呢？

参考的是：网上普遍流传的LDAP连接的代码

public boolean auth(String username, String password) {

//设置相关常量

String initialContextFactory ="com.sun.jndi.ldap.LdapCtxFactory";

String ad4ProviderURL ="ldap://ip:port";

String securityAuthentication ="simple";

String domain ="ad4";

if (!username.startsWith(domain)) {

username = domain+"\"+ username;

}

/*

* 组织参数集合

*/

Hashtable env = new Hashtable();

//set the initializing information of the context

env.put(javax.naming.Context.INITIAL_CONTEXT_FACTORY, initialContextFactory);

//set the URL of ldap server

env.put(javax.naming.Context.PROVIDER_URL, ad4ProviderURL);

//set the authentication mode

env.put(javax.naming.Context.SECURITY_AUTHENTICATION, securityAuthentication);

//set user of AD

env.put(javax.naming.Context.SECURITY_PRINCIPAL, username);

//set password of user

env.put(javax.naming.Context.SECURITY_CREDENTIALS, password);

/*

* 进行LDAP连接

*/

javax.naming.ldap.LdapContext ctx = null;

//initialize the ldap context

try {

ctx = new javax.naming.ldap.InitialLdapContext(env, null);

} catch (javax.naming.NamingException ex) {

System.out.println("Authentication error, username is:"+ username);

return false;

} finally {

if (ctx != null) {

try {

ctx.close();

} catch (javax.naming.NamingException ex) {

System.out.println("Close Authentication context error");

ex.printStackTrace();

}

return true;    //获取的LdapContext对象不为空，则为登录成功

}

}

return false;    //否则登录失败

}