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SpringMVC项目中获取所有URL到Controller Method的映射

Spring是一个很好很强大的开源框架,它就像是一个容器,为我们提供了各种Bean组件和服务。对于MVC这部分而言,它里面实现了从Url请求映射控制器方法的逻辑处理,在我们平时的开发工作中并不需要太多的理会这个Url是怎么和控制器中的方法建立映射的,一切都由Spring MVC帮我们搞定了。

但是我今天在做SDK工程的时候,突然产生一个想法:能否把我项目中的所有Url和Method的映射信息打印出来?以便我一眼就看出我已经完成了那些API接口开发,这些方法需要什么参数。就像下图所示:

image_thumb5

有了想法就要用行动,第一步肯定是要去看看别人是否已经解决了这个问题啦。查了半天的资料,倒是发现有几个相似的问题,但都没有满意的答案,只好自己调试Spring,跟踪它的处理步骤,终于让我发现了一个可行的办法,不多说,直接贴代码:

1、首先建立一个类来保存我想要的东东

private class RequestToMethodItem    {        public String controllerName;        public String methodName;        public String requestType;        public String requestUrl;        public Class<?>[] methodParmaTypes;        public RequestToMethodItem(String requestUrl, String requestType, String controllerName, String requestMethodName, 
Class<?>[] methodParmaTypes)        {            this.requestUrl = requestUrl;            this.requestType = requestType;            this.controllerName = controllerName;            this.methodName = requestMethodName;            this.methodParmaTypes = methodParmaTypes;        }    }

2、然后就是收集信息创建对象啦

@RequestMapping(value = http://www.mamicode.com/"/index", method = RequestMethod.GET)    public ModelAndView index(HttpServletRequest request)    {        ServletContext servletContext = request.getSession().getServletContext();        if (servletContext == null)        {            return null;        }        WebApplicationContext appContext = WebApplicationContextUtils.getWebApplicationContext(servletContext);        //请求url和处理方法的映射        List<RequestToMethodItem> requestToMethodItemList = new ArrayList<RequestToMethodItem>();        //获取所有的RequestMapping        Map<String, HandlerMapping> allRequestMappings = BeanFactoryUtils.beansOfTypeIncludingAncestors(appContext, 
HandlerMapping.class, true, false);        for (HandlerMapping handlerMapping : allRequestMappings.values())        {            //本项目只需要RequestMappingHandlerMapping中的URL映射            if (handlerMapping instanceof RequestMappingHandlerMapping)            {                RequestMappingHandlerMapping requestMappingHandlerMapping = (RequestMappingHandlerMapping) handlerMapping;                Map<RequestMappingInfo, HandlerMethod> handlerMethods = requestMappingHandlerMapping.getHandlerMethods();                for (Map.Entry<RequestMappingInfo, HandlerMethod> requestMappingInfoHandlerMethodEntry : handlerMethods.entrySet())                {                    RequestMappingInfo requestMappingInfo = requestMappingInfoHandlerMethodEntry.getKey();                    HandlerMethod mappingInfoValue = requestMappingInfoHandlerMethodEntry.getValue();                    RequestMethodsRequestCondition methodCondition = requestMappingInfo.getMethodsCondition();                    String requestType = SetUtils.first(methodCondition.getMethods()).name();                    PatternsRequestCondition patternsCondition = requestMappingInfo.getPatternsCondition();                    String requestUrl = SetUtils.first(patternsCondition.getPatterns());                    String controllerName = mappingInfoValue.getBeanType().toString();                    String requestMethodName = mappingInfoValue.getMethod().getName();                    Class<?>[] methodParamTypes = mappingInfoValue.getMethod().getParameterTypes();                    RequestToMethodItem item = new RequestToMethodItem(requestUrl, requestType, controllerName, requestMethodName, 
methodParamTypes);                    requestToMethodItemList.add(item);                }                break;            }        }        return new ModelAndView("index").addObject("MethodList", requestToMethodItemList);    }

这一步我需要说明一下,我这里只用了“RequestMappingHandlerMapping”中的映射信息,其实还有另外三个HandlerMapping,如果想要获取项目中所有的映射信息,肯定是一个都不能放过了。调试的 信息如下:

image_thumb7

3、取到数据后就展示呗,借助Thymeleaf,很容易就实现了展示,效果就是第一张图。

<!DOCTYPE html><html xmlns:th="http://www.thymeleaf.org"><head>    <title>Spring Thyme Seed Starter Manager</title>    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>    <link rel="stylesheet" type="text/css" media="all" href="../../css/stsm.css" th:href="@{/css/stsm.css}"/>    <title>请求方法列表</title></head><body><div style="margin: 0;padding: 0;text-align: center"><h1>请求方法列表</h1></div><div>    <ul>        <li th:each="method:${MethodList}">            <h3 th:text="${method.methodName}"></h3>            <p th:text="‘所属控制器:‘+${method.controllerName}"></p>            <p th:text="‘请求URL:‘+${method.requestUrl}"></p>            <p th:text="‘请求方式:‘+${method.requestType}"></p>            <div>                <p>方法参数列表:</p>                <ul>                    <li th:each="param:${method.methodParmaTypes}">                        <p th:text="${param}"></p>                    </li>                </ul>            </div>        </li>    </ul></div></body></html>

SpringMVC项目中获取所有URL到Controller Method的映射