配置文件进行编辑

1.以下是system.xml文件

<config>
   <sections>
       <shopcore translate="label" module="shopcore">
           <class>separator-top</class>
           <label>商城/专区设置</label>
           <tab>sales</tab>
           <frontend_type>text</frontend_type>
           <sort_order>100</sort_order>
           <show_in_default>1</show_in_default>
           <show_in_website>1</show_in_website>
           <show_in_store>0</show_in_store>
           <groups>
               <restriction translate="label" module="shopcore">
                   <label>限购逻辑</label>
                   <frontend_type>text</frontend_type>
                   <sort_order>100</sort_order>
                   <show_in_default>1</show_in_default>
                   <show_in_website>1</show_in_website>
                   <show_in_store>0</show_in_store>
                   <fields>
                       <blocked_period_mapping translate="label">
                           <label><![CDATA[限制时间段]]></label>
                           <comment><![CDATA[
                                   限制类型填数值：壹风暴=100，蜂速购=110，蜜好货=120，蚂实惠=130<br/>
                                   时间段格式：07:00-09:00,20:00-22:00<br/>
                                   时间段请勿跨越子夜，请不要填写诸如23:00-03:00的时间段
                           ]]></comment>
                           <frontend_model>hpservice/adminhtml_system_config_form_field_json</frontend_model>-----------------------这里调的文件中是在Black里面
                           <frontend_json_structure>map</frontend_json_structure> 
                           <frontend_json_key_label>限制类型</frontend_json_key_label>
                           <frontend_json_value_label>时间段</frontend_json_value_label>
                           <sort_order>300</sort_order>
                           <show_in_default>1</show_in_default>
                           <show_in_website>1</show_in_website>
                           <show_in_store>0</show_in_store>
                       </blocked_period_mapping>
                   </fields>
               </restriction>

</groups>
</shopcore>

</sections>
</config>

2.hpservice/adminhtml_system_config_form_field_json文件的内容如下:

class Harapartners_HpService_Block_Adminhtml_System_Config_Form_Field_Json extends Mage_Adminhtml_Block_System_Config_Form_Field {

   /*
   * 特殊类型的system config，将列表内容变成JSON保存
   * 缺省支持两种类型：
   * >> list结构，只保存值value，不保存key，没有值时缺省为[]
   * >> map结构，保存键key与键值value，没有值时缺省为{}
   */
   protected function _toHtml() {
       $element = $this->getData('element');
       $elementFieldConfig = $element->getFieldConfig();
       $elementJsonConfig = array(
               'structure'       => (string)$elementFieldConfig->frontend_json_structure,
               'key_label'       => (string)$elementFieldConfig->frontend_json_key_label,
               'value_label'   => (string)$elementFieldConfig->frontend_json_value_label,
       );

       // 键值从已知常量中选取中选取
       $rendererClassName = (string)$elementFieldConfig->frontend_json_key_option_renderer;
       if(!empty($rendererClassName)){
           $optionRenderer = Mage::getModel($rendererClassName);
           foreach($optionRenderer->getAllOptions() as $optionValue => $optionLabel){
               $keyOptionHtml .= "<option value='{$optionValue}'>{$optionLabel}</option>";
           }
           $elementJsonConfig['key_option_html'] = $keyOptionHtml;
       }

       $elementData = $this->_prepareElementData($element, $elementJsonConfig);
       $elementJsonConfig = json_encode($elementJsonConfig);

       $htmlContent = <<< HTML_CONTENT
<input type="hidden" id="{$element->getHtmlId()}" name="{$element->getName()}" value="{$element->getEscapedValue()}" {$this->serialize($element->getHtmlAttributes())}/>
<div id="{$element->getHtmlId()}_json_config_widget" class="json_config_widget_container"></div>
<script type="text/javascript">
   var {$element->getHtmlId()} = new JsonConfigWidget();
   {$element->getHtmlId()}.init("{$element->getHtmlId()}", $elementData, $elementJsonConfig);
</script>
HTML_CONTENT;
       return $htmlContent;
   }

   protected function _prepareElementData($element){
       $elementFieldConfig = $element->getFieldConfig();
       $elementJsonConfig = array(
               'structure'       => (string)$elementFieldConfig->frontend_json_structure,
               'key_label'       => (string)$elementFieldConfig->frontend_json_key_label,
               'value_label'   => (string)$elementFieldConfig->frontend_json_value_label,
       );
       $elementData = (string)$element->getValue();

       //Try to decode to validate the data, if not validate, use empty placeholders
       $jsonValidateData = json_decode(trim($element->getValue()), true);
       if(!$jsonValidateData){
           if(isset($elementJsonConfig['structure']) && $elementJsonConfig['structure'] == 'list'){
               $elementData = "[]";
           }else{
               $elementData = "{}";
           }
       }

       return $elementData;
   }

   protected function _getElementHtml(Varien_Data_Form_Element_Abstract $element){
       $this->addData(array(
           'element' => $element
       ));
       return $this->_toHtml();
   }

}

3.调取这里的值的方法是:

$prizePoolConfig = json_decode(Mage::getStoreConfig('shopcore/restriction_product_number/blocked_day_mapping'), 1);//因为调取的数据为json数据所以转成数组.