Servlet.init() for servlet springDispatcherServlet threw exception 问题

àì夳堔傛蜴生んèń 2021-11-04 16:40 284阅读 0赞

在搭建SSM框架时，整合业务逻辑层和表现层后一直报错， Servlet.init() for servlet springDispatcherServlet threw exception。Error creating bean with name ‘userController’: Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory。

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UserController代码如下

@Controller
    @RequestMapping("/user")
    public class UserController {
        @Autowired
        private UserService userService;
        private static Logger log= LoggerFactory.getLogger(UserController.class);
        @RequestMapping(value="/test",method= RequestMethod.GET)
        @ResponseBody
        public String test(HttpServletRequest request,Model model){
            int userId = Integer.parseInt(request.getParameter("id"));
            System.out.println("userId:"+userId);
            User u = userService.getUserById(1);
            System.out.println(u);
            return u.toString();
        }
    }

通过IDEA的bean查找能够一直定位到配置文件。

![å¨è¿éæå¥å¾çæè¿°][20190305170639472.png]

最后发现，web.xml中引入配置contextConfigLocation有两种写法，全部写到servlet中的init-parm中就没有问题，部分写到context-parm中就会报上述错误。init-parm和context-parm的区别，网上给的说法是：context-param在所有的servlet中都能使用，init-param只能在当前的servlet中使用，如果不在当前的servlet中使用，取的值为null。

（1）报错的写法：

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（2）正确的写法：

![å¨è¿éæå¥å¾çæè¿°][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl8zOTcyMjY1MQ_size_16_color_FFFFFF_t_70 2]

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[20190305170639472.png]: /images/20211104/0f0eb0fd1dbf487ea2c66a3eefbaaf37.png
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[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl8zOTcyMjY1MQ_size_16_color_FFFFFF_t_70 2]: /images/20211104/e571865406634ea59add0c662aca32d0.png