AD LDAP 分页查询

// LDAP连线相关设定
Hashtable<String, String> env = new Hashtable<String, String>();
env.put(Context.INITIAL_CONTEXT_FACTORY,
        "com.sun.jndi.ldap.LdapCtxFactory");
env.put(Context.SECURITY_PRINCIPAL, "cn=Manager,dc=maxkit,dc=com,dc=tw");
env.put(Context.SECURITY_CREDENTIALS, "secret");
env.put(Context.REFERRAL, "ignore");
env.put(Context.PROVIDER_URL, LDAP_URL);

LdapContext ctx = new InitialLdapContext(env, null);

// 设定分页相关资讯
int pageSize = 1000; //设定LDAP每次分页所取的资料笔数
byte[] cookie = null;
ctx.setRequestControls(new Control[]{new PagedResultsControl(
    pageSize, Control.CRITICAL)});

do {
    // 设定LDAP 人员查询条件
    String searchFilter = "(objectClass=organizationalPerson)";
    SearchControls searchCtls = new SearchControls();
    sea​​rchCtls.setSearchScope(SearchControls.SUBTREE_SCOPE);

    // 进行LDAP 资料查询与资料处理
    NamingEnumeration<SearchResult> results = ctx.search(
            "dc=maxkit,dc=com,dc=tw", searchFilter, searchCtls);
    while (results != null && results.hasMore()) {
        // ...
        // 这边执行LDAP 查出来的人员相关处理逻辑
        // ...
    }       

    //================================================ ==
    // 换页处理开始
    //================================================ ==

    // 此分页资料处理完毕，底下先取出cookie，
    // 如果cookie不为null，则表示还有下一页的资料
    Control[] controls = ctx.getResponseControls();
    if (controls != null) {
        for (int i = 0; i < controls.length; i++) {
            if (controls[i] instanceof PagedResultsResponseControl) {
                PagedResultsResponseControl prrc = 
                    (PagedResultsResponseControl) controls[i];
                cookie = prrc.getCookie();
            }
        }
    }

    // 将cookie资讯提供给InitialLdapContext，让它在接下来的查询中进行换页
    ctx.setRequestControls(new Control[]{new PagedResultsControl(
            pageSize, cookie, Control.CRITICAL)});

    //================================================ ==
    // 换页处理结束
    //================================================ ==
} while (cookie != null);

ctx.close();