经过几个小时的搜索，我在另一个网站上找到了我的答案http://wpquestions.com/question/showChrono/id/10819
<?php
// List posts by the terms for a custom taxonomy of any post type
$post_type = \'product\';
$tax = \'products\';
$tax_args = array(
\'order\' => \'DESC\',
\'parent\' => 0
);
// get all the first level terms only
$tax_terms = get_terms( $tax, $tax_args );
if ($tax_terms) {
foreach ($tax_terms as $tax_term) { // foreach first level term
// print the parent heading
?>
<h4 class="parent-term"><?php echo $tax_term->name; ?></h4>
<?php
// get all its children
$child_terms = ""; // first ensure this var is empty
$child_terms = get_terms ( $tax, array(\'order\' => \'DESC\', \'parent\' => $tax_term->term_id) );
// store an array of child terms slug
$child_terms_array = array();
foreach ($child_terms as $child_term){
$child_terms_array[] = $child_term->slug;
}
// first of all, print the posts of the parent, but excluding the one which are also into a child term
$parent_args="";
$parent_args = array(
\'post_type\' => $post_type,
\'tax_query\' => array(
\'relation\' => \'AND\',
array(
\'taxonomy\' => $tax,
\'field\' => \'slug\',
\'terms\' => $tax_term->slug,
\'include_children\' => false,
\'operator\' => \'IN\'
),
array(
\'taxonomy\' => $tax,
\'field\' => \'slug\',
\'terms\' => $child_terms_array,
\'include_children\' => false,
\'operator\' => \'NOT IN\'
)
),
\'post_status\' => \'publish\',
\'posts_per_page\' => 6,
\'order\' => \'ASC\',
);
// query the posts
$parent_query = null;
$parent_query = new WP_Query($parent_args);
if( $parent_query->have_posts() ) : ?>
<ul>
<?php while ( $parent_query->have_posts() ) : $parent_query->the_post(); ?>
<li><a href="<?php the_permalink() ?>">
<?php the_title(); ?>
</a>
</li>
<?php endwhile; // end of loop ?>
</ul>
<?php endif; // if have_posts()
wp_reset_query();
// if any, foreach child term, query the posts
if ( !empty($child_terms) ){
foreach ($child_terms as $child_term){
$child_args="";
$child_args = array(
\'post_type\' => $post_type,
\'tax_query\' => array(
array(
\'taxonomy\' => $tax,
\'field\' => \'slug\',
\'terms\' => $child_term->slug,
\'include_children\' => false,
\'operator\' => \'IN\'
)
),
\'post_status\' => \'publish\',
\'posts_per_page\' => 6,
\'order\' => \'ASC\',
);
// query the posts
$child_query = null;
$child_query = new WP_Query($child_args);
if( $child_query->have_posts() ) : ?>
<h4 class="child-term"><?php echo $child_term->name; ?></h4>
<ul>
<?php while ( $child_query->have_posts() ) : $child_query->the_post(); ?>
<li><a href="<?php the_permalink() ?>">
<?php the_title(); ?>
</a>
</li>
<?php endwhile; // end of loop ?>
</ul>
<?php endif; // if have_posts()
wp_reset_query();
} // end foreach #child_terms
}
} // end foreach #parent_term
}
?>
