[原創]JEECMS 自定義標簽調用廣告版位下的所有廣告(利用廣告管理管理首頁幻燈片)

JEECMS自帶的只有[@cms_advertising]標簽，並且官方沒有給文檔，用法:

[@cms_advertising id='3'] 
            <img src="${(tag_bean.attr.image_url)!?html}" width="${(tag_bean.attr.image_width)!?html}" height="${(tag_bean.attr.image_height)!?html}" /> 
 [/@cms_advertising]

這個是根據廣告ID的來調用單獨的一條廣告，首頁幻燈片一般都有多張，不能滿足需求。

其實jeecms也有另一個js調用已經實現了的，但是不能生成到html中，用戶體驗不好。（com.jeecms.cms.action.front.AdvertisingAct類，<script src="/ad.jspx"  ……）

 

回到正題，自己增加一個標簽，名字叫做：cms_advertising_space

 

步驟一：

jeecms-context.xml中增加一個bean：

	<!-- 新增按照廣告牌取所有廣告標簽 -->
	<bean id="cms_advertising_space" class="com.jeecms.cms.action.directive.CmsAdvertisingSpaceDirective"/>

步驟二：

jeecms.properties添加cms_advertising_space標簽

directive.cms_advertising_space=cms_advertising_space

　　

步驟三：

新增一個類：CmsAdvertisingSpaceDirective

package com.jeecms.cms.action.directive;

import static com.jeecms.common.web.freemarker.DirectiveUtils.OUT_BEAN;
import static freemarker.template.ObjectWrapper.DEFAULT_WRAPPER;

import java.io.IOException;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import org.springframework.beans.factory.annotation.Autowired;
import static com.jeecms.common.web.freemarker.DirectiveUtils.OUT_LIST;
import com.jeecms.cms.entity.assist.CmsAdvertising;
import com.jeecms.cms.entity.assist.CmsAdvertisingSpace;
import com.jeecms.cms.manager.assist.CmsAdvertisingMng;
import com.jeecms.cms.manager.assist.CmsAdvertisingSpaceMng;
import com.jeecms.common.web.freemarker.DirectiveUtils;

import freemarker.core.Environment;
import freemarker.template.TemplateDirectiveBody;
import freemarker.template.TemplateDirectiveModel;
import freemarker.template.TemplateException;
import freemarker.template.TemplateModel;

/**
 * 廣告對象標簽
 */
public class CmsAdvertisingSpaceDirective implements TemplateDirectiveModel {
    /**
     * 輸入參數，廣告ID。
     */
    public static final String PARAM_ID = "id";


    @SuppressWarnings("unchecked")
    public void execute(Environment env, Map params, TemplateModel[] loopVars,
            TemplateDirectiveBody body) throws TemplateException, IOException {
        Integer id = DirectiveUtils.getInt(PARAM_ID, params);
        List<CmsAdvertising> ads = null;
        CmsAdvertisingSpace adspace;
        if (id != null) {
            
            //ad = cmsAdvertisingMng.findById(id);
            ads= cmsAdvertisingMng.getList(id, true);
        }
        Map<String, TemplateModel> paramWrap = new HashMap<String, TemplateModel>(
                params);
        if (ads!=null){
            paramWrap.put(OUT_LIST, DEFAULT_WRAPPER.wrap(ads));
        }
        
        Map<String, TemplateModel> origMap = DirectiveUtils
                .addParamsToVariable(env, paramWrap);
        body.render(env.getOut());
        DirectiveUtils.removeParamsFromVariable(env, paramWrap, origMap);
    }

    @Autowired
    private CmsAdvertisingMng cmsAdvertisingMng;
    @Autowired
    private CmsAdvertisingSpaceMng cmsAdvertisingSpaceMng;
}

 

標簽寫法：

[@cms_advertising_space id='7'] 
[#list tag_list as c]

<img src="${(c.attr.image_url)!?html}" width="${(c.attr.image_width)!?html}" height="${(c.attr.image_height)!?html}" /> 
[/#list]    
 [/@cms_advertising_space]

　　生成代碼：

<img src="http://127.0.0.1:8080/r/cms/kingyon_zh/uploads/7-140611092P2415.jpg" width="" height="" /> 

<img src="http://127.0.0.1:8080/r/cms/kingyon_zh/uploads/3-140611092P2415.jpg" width="" height="" />