背景:
公司面向微信开发,可谓步步是坑,获取完微信用户信息之后,页面停留在微信的页面上,突然想到可以使用重定向把页面跳转回来,但是昨天屡屡失败,因为重定向返回了json数据,实在百思不得其解,今天偶然看到一篇博客,记录一下
原文链接:https://www.cnblogs.com/java-dyb/p/10912749.html
这里总结一下重定向的方法
(1)通过ModelAndView跳转
@RequestMapping("alipayforward") public ModelAndView alipayforward(HttpServletRequest req, HttpServletResponse resp) throws Exception { String contNo =req.getParameter("contNo"); logger.info("访问/downloadRequestElecCont.action"); String url = "redirect:http://baidu.com/downloadRequestElecCont.action?contNo="+contNo; return new ModelAndView(url); }
(2)通过HttpServletResponse跳转
@RequestMapping("alipayforward/{contNo}") public void alipayforward(@PathVariable("contNo") String contNo, HttpServletRequest req, HttpServletResponse resp) throws Exception { //String contNo =req.getParameter("contNo"); //保单号 logger.info("访问/downloadRequestElecCont.action"); resp.sendRedirect("http://baidu.com/downloadRequestElecCont.action?contNo="+contNo); }
(3)通过redirect返回String类型跳转
注意:这种方法不允许Spring控制器用@RestController注解,因为@RestController相当于类中的所有方法都标注了@ResponseBody,这些方法不会返回一个视图,而是返回一个json对象,这样的话只是在页面上打印出字符串,而不跳转。控制器用@Controller注解即可
@RequestMapping("alipayforward") public String alipayforward(@RequestParam("contNo") String contNo, HttpServletRequest req, HttpServletResponse resp) throws Exception { //String contNo =req.getParameter("contNo"); //保单号 logger.info("访问/downloadRequestElecCont.action"); return "redirect:http://baidu.com/downloadRequestElecCont.action?contNo="+contNo; }
下面是关于传参问题
重定向传参为get方式,如果传参数较多,可以封装到map或modelMap中
@RequestMapping(params = "action=alipayforward") public String alipayforward(Map modelMap){ modelMap.put("userName", "呵呵"); modelMap.put("password", "123456"); modelMap.put("age", "25"); return "redirect:http://localhost:8088/era/user/alipayforward4?modelMap="+modelMap; }
另一个项目用实体类对象接收
@RequestMapping("alipayforward4") public void alipayforward4(User user, HttpServletRequest req) throws Exception { System.out.println(user.getPassword()); String modelMap = req.getParameter("modelMap"); System.out.println(modelMap); }