ServletContext

public class HelloServlet extends HttpServlet {
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        ServletContext context=this.getServletContext();
        resp.setContentType("text/html");
        resp.setCharacterEncoding("utf-8");//经过这两行设置之后才能输出字符
        String guo="郭江龙";
        context.setAttribute("guo",guo);//将数据传入contex容器，键为guo
        resp.getWriter().println("嘿嘿嘿哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈");
    }
}

 1 public class GetServlet extends HttpServlet {
 2 
 3     @Override
 4     protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
 5         ServletContext  context=this.getServletContext();//取得数据
 6       String guo=(String) context.getAttribute("guo");
 7       resp.setContentType("text/html");
 8       resp.setCharacterEncoding("utf-8");
 9        resp.getWriter().print("名字为"+guo);
10 
11     }
12 }