spring mvc redirect 重定向 跳转并传递参数

在项目中做form表单功能提交时，防止用户客户端后退或者刷新时重复提交问题，需要在服务端进行重定向跳转，具体跳转方式有以下几种方式：

公用代码:

@RequestMapping(value=“/index”,method = { RequestMethod.POST, RequestMethod.GET })
public  ModelAndView index(HttpServletResponse response){
    ModelAndView model = new ModelAndView(“/home/index”);
    return model;
}

@RequestMapping(value="/index",method = { RequestMethod.POST, RequestMethod.GET })
public  ModelAndView index(HttpServletResponse response){
    ModelAndView model = new ModelAndView("/home/index");
    return model;
}

一、使用HttpServletResponse 进行重定向跳转

  

     @RequestMapping(value=“/toIndex”,method = { RequestMethod.POST, RequestMethod.GET })
ublic  ModelAndView toIndex(HttpServletResponse response){
try {
    response.sendRedirect(”/index”);
} catch (IOException e1) {
}
return null;

       @RequestMapping(value="/toIndex",method = { RequestMethod.POST, RequestMethod.GET })
    public  ModelAndView toIndex(HttpServletResponse response){
        try {
            response.sendRedirect("/index");
        } catch (IOException e1) {
        }
        return null;
    }

二、依赖spring mvc的 ViewResolver直接跳转

@RequestMapping(value=“/toIndex”,method = { RequestMethod.POST, RequestMethod.GET })
public  String toIndex(HttpServletResponse response){
    return “redirect:/index”;
}

@RequestMapping(value="/toIndex",method = { RequestMethod.POST, RequestMethod.GET })
public  String toIndex(HttpServletResponse response){
    return "redirect:/index";
}

注：当需要传递简单参数时可以使用以上两种方式通过get方式将参数拼接到url路劲后面。

三、依赖Spring mvc的RedirectAttributes 

@RequestMapping(value=“/toIndex”,method = { RequestMethod.POST, RequestMethod.GET })
public  String toIndex(HttpServletResponse response,RedirectAttributes model){
    model.addFlashAttribute(”userName”, ‘TimerBin’);
    model.addFlashAttribute(”userPass”, ‘ApeVm23U3wxEGocX’);
    return “redirect:/index”;
}

@RequestMapping(value="/toIndex",method = { RequestMethod.POST, RequestMethod.GET })
public  String toIndex(HttpServletResponse response,RedirectAttributes model){
    model.addFlashAttribute("userName", 'TimerBin');
    model.addFlashAttribute("userPass", 'ApeVm23U3wxEGocX');
    return "redirect:/index";
}

 在/home/index 可以直接使用{</span><span style="font-family: monospace; line-height: 1.5; background-color: #fafafa;">userName</span><span style="font-family: monospace; line-height: 1.5; background-color: #fafafa;">},</span><span style="line-height: 1.5; font-family: monospace; background-color: #fafafa;">$\text{{</span><span style="font-family: monospace; line-height: 1.5; background-color: \#fafafa;">userName</span><span style="font-family: monospace; line-height: 1.5; background-color: \#fafafa;">},</span><span style="line-height: 1.5; font-family: monospace; background-color: \#fafafa;">}${userPass}来获取重定向跳转的参数信息，这种方式可以处理复杂的参数传值问题，还可以使用此种方式来隐藏或缩短原有请求URL信息。

在controller中获取放在RedirectAttributes中的userName信息的方式：

@RequestMapping(value=“/index”,method = { RequestMethod.POST, RequestMethod.GET })
public  ModelAndView index(@ModelAttribute(“userName”) String userName){
        ModelAndView  model = new ModelAndView(“/main/index”);
    model.addObject(”userName”, userName);
    return model;
}

@RequestMapping(value="/index",method = { RequestMethod.POST, RequestMethod.GET })
public  ModelAndView index(@ModelAttribute("userName") String userName){
        ModelAndView  model = new ModelAndView("/main/index"); 
    model.addObject("userName", userName);
    return model;
}

 注：在项目中使用RedirectAttributes，因为该对象就是把参数信息放到项目中的session中，再多台服务器中使用该对象存储参数时已经要保证sesion设置是粘性的，不然在集群服务器中不支持该对象的使用！