详解Java从后台重定向(redirect)到另一个项目的方法

发布于 2020-12-30|标签java
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摘记: (1)通过ModelAndView跳转 ```java @RequestMapping("alipayforward") public ModelAndView alipayforward(HttpServletRequest req, HttpServletResponse resp) throws Exception { ..
(1)通过ModelAndView跳转 ```java @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 ```java @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 ```java @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 ```java @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 ```java @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); } ``` 原文地址: http://blog.csdn.net/aqsunkai/article/details/51374670
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