在Servlet中获取业务层service对象的方法-优快云博客

本文介绍了一个基于Java的Ajax异步处理示例，通过继承HttpServlet类实现了一个名为AjaxProcess的服务。该服务主要提供了获取唯一订单编号的功能，并且初始化过程中会从Spring上下文中加载所需的AnalyzeproductService和AnalyzeorderService两个业务服务。

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public class AjaxProcess extends HttpServlet {

private AnalyzeproductService pService;
private AnalyzeorderService orderService;

public AjaxProcess() {
super();
}

public void destroy() {
super.destroy();
}

public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
doPost(request, response);
}

public void doPost(HttpServletRequest request, HttpServletResponse response)
   throws ServletException, IOException {
  response.setContentType("text/html");
  response.setCharacterEncoding("gb2312");
  PrintWriter out = response.getWriter();
  String method=request.getParameter("method");
  //生成编号
  if("getNumber".equals(method)){
   String number=orderService.createNumber();
   out.println(number);

  }
}

public void init() throws ServletException {
    super.init();
    pService = (AnalyzeproductService) WebApplicationContextUtils
     .getRequiredWebApplicationContext(getServletContext())
     .getBean("analproductService");
    orderService=(AnalyzeorderService) WebApplicationContextUtils
     .getRequiredWebApplicationContext(getServletContext())
     .getBean("analyzeorderService");

}