ldap分页 - 通过jndi实现

目标

通过REST API方式调用ldap分页结果

过程

ldap的分页是通过cookie实现，通过Cursor自动生成的代码并稍作如下

public static void main(String[] args) throws IOException, NamingException {
    // Set up the LDAP context
    String ldapUrl = "ldap://example.com:389";
    String ldapUser = "cn=admin,dc=example,dc=com";
    String ldapPassword = "password";
    String ldapBaseDn = "ou=people,dc=example,dc=com";
    String ldapFilter = "(objectClass=organizationalUnit)";
    String[] ldapAttrs = {"ou"};
    

    SearchControls searchControls = new SearchControls();

    // Set the search scope to subtree
    searchControls.setSearchScope(SearchControls.SUBTREE_SCOPE);

    // Set up the pagination control
    int pageSize = 10;
    byte[] cookie = null;
    Control[] controls = new Control[]{new PagedResultsControl(pageSize, Control.CRITICAL)};
    boolean hasMorePages = true;

    // Perform the LDAP search
    while (hasMorePages) {

        Hashtable<String, String> env = new Hashtable<String, String>();
        env.put(Context.INITIAL_CONTEXT_FACTORY, "com.sun.jndi.ldap.LdapCtxFactory");
        env.put(Context.PROVIDER_URL, ldapUrl);
        env.put(Context.SECURITY_AUTHENTICATION, "simple");
        env.put(Context.SECURITY_PRINCIPAL, ldapUser);
        env.put(Context.SECURITY_CREDENTIALS, ldapPassword);

        // Set up the LDAP context
        DirContext ctx = new InitialDirContext(env);

        LdapContext ldapContext = (LdapContext) ctx.lookup("");
        ldapContext.setRequestControls(controls);
        searchControls.setReturningAttributes(ldapAttrs);

        // Perform the LDAP search
        NamingEnumeration<?> results = ldapContext.search(ldapBaseDn, ldapFilter, searchControls);

        // Process the search results
        while (results.hasMore()) {
            // Do something with the search result
            System.out.println(results.next());
        }

        // Check if there are more pages
        PagedResultsResponseControl responseControl = (PagedResultsResponseControl) ldapContext.getResponseControls()[0];
        if (responseControl != null) {
            cookie = responseControl.getCookie();
            hasMorePages = (cookie != null);
        }

        // Close the LDAP context
        ldapContext.close();
    }


}

上面示例可以将ldap中的条目按照每页数量循环打印