一个servlet处理来自多个不同页面的请求！

例如有一个用户表，我们要处理添加，删除用户以及登录功能

对应的有add.jsp del.jsp login.jsp等

<body>
  <!-- login.jsp -->
    <form action="UserServlet?method=login" method="post" id="login">
        userName:<input type="text" name="userName"/>
        passWord:<input type="password" name="passWord"/>
        submit:<input type="submit" value="submit"/>
    </form>
  </body>

 <body>
  <!-- add.jsp -->
    <form action="UserServlet?method=add" method="post" id="add">
        userName:<input type="text" name="userName"/>
        passWord:<input type="password" name="passWord"/>
        name:<input type="text" name="name"/>
        submit:<input type="submit" value="submit"/>
    </form>
  </body>

//UserServlet
    public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        String method = request.getParameter("method");
        if(method.equals("login")){
            //处理登录
        }
        else if(method.equals("add")){
            //处理添加
        }
    }