Java中使用LDAP登录

近期，因接入集团登录系统，需要通过LDAP实现登录。

什么是LDAP

LDAP是轻量目录访问协议，英文全称是Lightweight Directory Access Protocol，一般都简称为LDAP。它是基于X.500标准的，但是简单多了并且可以根据需要定制。与X.500不同，LDAP支持TCP/IP，这对访问Internet是必须的。LDAP的核心规范在RFC中都有定义，所有与LDAP相关的RFC都可以在LDAPman RFC网页中找到。 ----【百度百科】

连接LDAP

String ldapUrl = "ldap://*******:389";  // LDAP 访问地址
String ldapFactory = "com.sun.jndi.ldap.LdapCtxFactory";
String ldapAccount = "***";
String ldapPwd = "****";  //密码

public LdapContext connetLDAP() throws NamingException{
		Hashtable env = new Hashtable();
		env.put(Context.INITIAL_CONTEXT_FACTORY, ldapFactory);
		env.put(Context.PROVIDER_URL, ldapUrl);
		env.put(Context.SECURITY_AUTHENTICATION, "simple");
		env.put(Context.SECURITY_PRINCIPAL, ldapAccount);
		env.put(Context.SECURITY_CREDENTIALS, ldapPwd);
		LdapContext ctxTDS = new InitialLdapContext(env,null);
		return ctxTDS;
	}

LDAP查询

	public void findUser(String umAccount) throws NamingException{
		LdapContext ctx = connetLDAP();
		String userinfo = "";
		int flag = 0;
		// 设置搜索过滤条件
		String filter = "(sAMAccountName="+umAccount+")";
		// 定制返回属性
		String[] attrPersonArray = {"Nickname","mobile","mail","department"};
		SearchControls searchControls = new SearchControls();
		// 设置搜索范围
		searchControls.setSearchScope(SearchControls.SUBTREE_SCOPE);
		searchControls.setTimeLimit(3000);
		searchControls.setReturningAttributes(attrPersonArray);
		NamingEnumeration<SearchResult> answer = ctx.search(dn, filter.toString(), searchControls);
		String[] a = searchControls.getReturningAttributes();
		while(answer.hasMoreElements()) {
			SearchResult result = answer.next();
			NamingEnumeration<? extends Attribute> attrs = result.getAttributes().getAll();
			// 读取属性值
			while(attrs.hasMoreElements()) {
				Attribute attr = attrs.next();
				if(attrPersonArray.length != flag) {
					flag = flag +1;
					userinfo = userinfo + attr.get()+",";
				}
			}
		}
		System.out.println(userinfo);
	}

关闭LDAP连接

LdapContext ctx = connetLDAP();
if (ctx != null) {
     try {
         ctx.close();
     } catch (NamingException e) {
         System.out.println("NamingException in close():" + e);
     }
}