Struts2 学习

1. HttpServletRequest request = ServletActionContext.getRequest();structs2得到request
2. 后台数据以json传回前台
   JSONArray jsonArray = JSONArray.fromObject(lists);
try {
ServletActionContext.getResponse().setContentType("text/html");
ServletActionContext.getResponse().setCharacterEncoding("utf-8");
ServletActionContext.getResponse().getWriter().print(jsonArray);
ServletActionContext.getResponse().getWriter().flush();
ServletActionContext.getResponse().getWriter().close();
} catch (IOException e) {
e.printStackTrace();
}