数据处理及跳转

<!-- 视图解析器 -->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"
     id="internalResourceViewResolver">
   <!-- 前缀 -->
   <property name="prefix" value="/WEB-INF/jsp/" />
   <!-- 后缀 -->
   <property name="suffix" value=".jsp" />
</bean>Copy

public class ControllerTest1 implements Controller {  public ModelAndView handleRequest(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse) throws Exception {
       //返回一个模型视图对象
       ModelAndView mv = new ModelAndView();
       mv.addObject("msg","ControllerTest1");
       mv.setViewName("test");
       return mv;
  }
}Copy

@Controller
public class ControllerTest1 {

    @RequestMapping("/result/t1")
    public void test1(HttpServletRequest req, HttpServletResponse resp) throws IOException {
        resp.getWriter().println("Hello!Spring by servlet API");
    }

    @RequestMapping("/result/t2")
    public void test2(HttpServletRequest req,HttpServletResponse resp) throws IOException {
        resp.sendRedirect("/index.jsp");
    }

    @RequestMapping("result/t3")
    public void test3(HttpServletRequest req,HttpServletResponse resp) throws ServletException, IOException {
        //转发
        req.setAttribute("msg","/result/t3");
        req.getRequestDispatcher("/WEB-INF/jsp/test.jsp").forward(req,resp);
    }

}Copy

//通过SpringMVC来实现转发和重定向 - 无需视图解析器
@Controller
public class ControllerTest2 {

    @RequestMapping("/rsm/t1")
    public String test1() {
        //转发
        return "/index.jsp";
    }

    @RequestMapping("/rsm/t2")
    public String test2() {

        //转发
        return "forward:/index.jsp";
    }

    @RequestMapping("/rsm/t3")
    public String test3() {
        return "redirect:/index.jsp";
    }

}Copy

public class ControllerTest3 {
    @RequestMapping("/hello")
    public String test1(String name, Model model) {
//        System.out.println(name);
        model.addAttribute("msg",name);
        return "test";
    }
}Copy

@RequestMapping("/hello2")
    public String test2(@RequestParam("username") String name, Model model) {

        model.addAttribute("msg",name);
        return "test";
    }Copy

public class User {
   private int id;
   private String name;
   private int age;
   //构造
   //get/set
   //tostring()
}Copy

@RequestMapping("/user")
public String test3(User user){
   System.out.println(user);
   return "hello";
}Copy

public class ControllerTest1 implements Controller {  public ModelAndView handleRequest(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse) throws Exception {
       //返回一个模型视图对象
       ModelAndView mv = new ModelAndView();
       mv.addObject("msg","ControllerTest1");
       mv.setViewName("test");
       return mv;
  }
}Copy

@RequestMapping("/hello")
public String hello(@RequestParam("username") String name, ModelMap model){
   //封装要显示到视图中的数据
   //相当于req.setAttribute("name",name);
   model.addAttribute("name",name);
   System.out.println(name);
   return "hello";
}Copy

@RequestMapping("/ct2/hello")
public String hello(@RequestParam("username") String name, Model model){
   //封装要显示到视图中的数据
   //相当于req.setAttribute("name",name);
   model.addAttribute("msg",name);
   System.out.println(name);
   return "test";
}Copy