springmvc架構工具類引用service爲null的解決辦法

1.由於LogInfoUtil類沒有受注入掃描，就算給 dictService加註解，也不能解決；

2.由於dao層是接口，不能new，所以不能實例化點調；

實例代碼如下：

package com.pns.util;


import java.util.HashMap;
import java.util.Map;


import javax.servlet.ServletContext;
import javax.servlet.http.HttpServletRequest;


import org.springframework.web.context.support.WebApplicationContextUtils;
import org.springframework.web.context.support.XmlWebApplicationContext;


import com.pns.service.dict.DictService;

public class LogInfoUtil {
	
	private DictService dictService;
	
	public void CreatLogInfo(HttpServletRequest request,String sendrec_flg,String class_path,String method_name,
			String flag,String data_org,String data_input){
		Map<String,Object> map = new HashMap<String,Object>();
		map.put("sendrec_flg", sendrec_flg==null?"":sendrec_flg);
		map.put("class_path", class_path==null?"":class_path);
		map.put("method_name", method_name==null?"":method_name);
		map.put("flag", flag==null?"":flag);
		map.put("data_org", data_org==null?"":data_org);
		map.put("data_input", data_input==null?"":data_input);
		
		ServletContext sc = request.getSession().getServletContext();
    	XmlWebApplicationContext cxt = (XmlWebApplicationContext)WebApplicationContextUtils.getWebApplicationContext(sc);
    	   if(cxt != null && cxt.getBean("dictService") != null && dictService == null){
    		   dictService = (DictService) cxt.getBean("dictService");
    	   }
		dictService.insertLogInfo(map);
	}

}