做公眾號訊息推送需要用道acces_token這是微信通過你公眾號的appid和appsecrect生成的。

/** 
     * 
     * 獲取微信access_token 
     * <功能詳細描述> 
     * @param appid 
     * @param secret 
     * @return 
     * @see [類、類#方法、類#成員] 
     */  
    public  String getWeiXinAccessToken()  
    {  
    	 String getResponse="";
    	 String appid=SysParamUtil.getParam("cztx_appid");
    	 String secret=SysParamUtil.getParam("cztx_appsecrect");
        try  
        {  
            String url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid="+appid+"&secret="+secret;  
            HttpClient httpClient = new HttpClient();  
            GetMethod getMethod = new GetMethod(url);  
            int execute = httpClient.executeMethod(getMethod);  
            System.out.println("execute:"+execute);  
            getResponse = getMethod.getResponseBodyAsString();  
             
        }  
        catch (IOException e)  
        {  
            logger.error("getAccessToken failed,desc:::"+e);  
            e.printStackTrace();  
        }  
        System.out.println(getResponse);  
        JSONObject json=JSONObject.from(getResponse);       
       return json.getString("access_token");  
    }