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:
Java代码
- @RequestMapping(value=“/index”,method = { RequestMethod.POST, RequestMethod.GET })
- public ModelAndView index(HttpServletResponse response){
- ModelAndView model = new ModelAndView(“/home/index”);
- return model;
- }
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
Java代码
- @RequestMapping(value=“/toIndex”,method = { RequestMethod.POST, RequestMethod.GET })
- ublic ModelAndView toIndex(HttpServletResponse response){
- try {
- response.sendRedirect(”/index”);
- } catch (IOException e1) {
- }
- return null;
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
Java代码
- @RequestMapping(value=“/toIndex”,method = { RequestMethod.POST, RequestMethod.GET })
- public String toIndex(HttpServletResponse response){
- return “redirect:/index”;
- }
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
Java代码
- @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”;
- }
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;">{</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:
Java代码
- @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;
- }
value="/index",method = { RequestMethod.POST, RequestMethod.GET })(
public ModelAndView index( ("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!