java 后代重定向到页面,Java从后台重定向（redirect）到另一个项目的方法

本文摘自：http://blog..net/aqsunkai/article/details/51374670

首先感谢博主的总结，让我成功解决了自己的问题，想转发呢 但是因为转发不成所以就copy啦~望见谅！

(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);

}