HttpServletRequest

什么是HttpServletRequest?

HttpServletRequest代表客户端的请求,用户通过Http协议访问服务器,HTTP请求中的所有信息会被封装到HttpServletRequest,通过这个HttpServletRequest的方法,获得客户端的所有信息;

HttpServletRequest的使用

@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {

    req.setCharacterEncoding("utf-8");
    resp.setCharacterEncoding("utf-8");

    String username = req.getParameter("username");
    String password = req.getParameter("password");
    String[] hobbys = req.getParameterValues("hobbys");
    System.out.println("=============================");
    //后台接收中文乱码问题
    System.out.println(username);
    System.out.println(password);
    System.out.println(Arrays.toString(hobbys));
    System.out.println("=============================");


    System.out.println(req.getContextPath());
    //通过请求转发
    //这里的 / 代表当前的web应用
    req.getRequestDispatcher("/success.jsp").forward(req,resp);

}


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