Spring MVC结果跳转方式

1.设置设置ModelAndView对象，根据view名和视图解析器，跳转到对应的视图（视图解析器前缀+view-name+视图解析器后缀）

ModelAndView mView = new ModelAndView();        mView.addObject("msg","hhhh anotation");        mView.setViewName("hello");        return mView;

2. 通过Servlet api来实现（不需要试图解析器）

通过HttpServletResponce输出

public void hello(HttpServletRequest req,HttpServletResponse res) throws IOException {          res.getWriter().println("servlet api");}

通过HttpServletResponce实现重定向

public void hello(HttpServletRequest req,HttpServletResponse res) throws IOException {          res.sendRedirect("index.jsp");    }

通过HttpServletResponce实现转发

public void hello(HttpServletRequest req,HttpServletResponse res) throws IOException, ServletException {          req.setAttribute("msg", "forward servlet api");         req.getRequestDispatcher("index.jsp").forward(req, res);    }

3. 使用springmvc 实现重定向与转发（不需视图渲染器）

实现转发1

    public String hello(HttpServletRequest req,HttpServletResponse res) throws IOException, ServletException {          return "index.jsp";     }

实现转发2

public String hello1(HttpServletRequest req,HttpServletResponse res) throws IOException, ServletException {          return "forward:index.jsp";    }

实现重定向

    public String hello1(HttpServletRequest req,HttpServletResponse res) throws IOException, ServletException {          return "redirect:index.jsp";    }

4. 使用spring mvc实现重定向与转发（需要视图解析器）

实现转发

public String hello(HttpServletRequest req,HttpServletResponse res) throws IOException, ServletException {          return "hello";    }

注意：重定向实现return “redirect:index.jsp”;无需视图解析器