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  • Java从后台重定向(redirect)到另一个项目的方法

    (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);
    }
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  • 原文地址:https://www.cnblogs.com/aqsunkai/p/6690618.html
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