.... 无跳转微信授权。

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; 
  }