小白随记【1】

//前台发出请求到后台  查询数据
    $.ajax({
            url:"${path}/路径",
            data:{"company":company },
            type:"POST", 
            success:function(data){
                var cer = data.certificate;
            }
        });

public void test(){
    PrintWriter out=null;
    HttpServletRequest request = ServletActionContext.getRequest();
        try {
            HttpServletResponse response = ServletActionContext.getResponse();
            response.setContentType("application/json;charset=gbk");
            out = response.getWriter();
            String company = request.getParameter("company");
            //String  -- > int  
            int companyId = Integer.valueOf(company).intValue();
            //查询数据
            Company comData = companyService.selectSecretKeyByCompanyId(companyId);
            //返回数据到前台
            String json = JSON.toJSONString(comData);
            out.write(json);
        } catch (Exception e) {
            e.printStackTrace();
        }finally{
            if(out!=null){
                out.flush();
                out.close();
            }
        }
    }

/*
    前台data获取到的数据为[object object]对象,所以解析出来想要的数据,直接data.对象.
*/
success:function(data){
        var cer = data.对象(key);
    }