獲取一個Java項目的所有接口信息

1.建立一個實體類

public 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.從springbean容器中獲取所有的實例bean封裝成list轉化成json輸出

　　@RequestMapping(value = "/xxx", method = RequestMethod.GET)
    public ModelAndView index(HttpServletRequest request)
    {
        ServletContext servletContext = request.getSession().getServletContext();
        if (servletContext == null)
        {
            return null;
        }
        WebApplicationContext appContext = WebApplicationContextUtils.getWebApplicationContext(servletContext);

        //請求url和處理方法的映射
        List<RequestToMethodItem> requestToMethodItemList = new ArrayList<RequestToMethodItem>();
        //獲取所有的RequestMapping
        Map<String, HandlerMapping> allRequestMappings = BeanFactoryUtils.beansOfTypeIncludingAncestors(appContext, 
    HandlerMapping.class, true, false);

        for (HandlerMapping handlerMapping : allRequestMappings.values())
        {
            //本項目只需要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())
                {
　　　　　　　　　　　　// 獲取實體對象
                    RequestMappingInfo requestMappingInfo = requestMappingInfoHandlerMethodEntry.getKey();
                    HandlerMethod mappingInfoValue = requestMappingInfoHandlerMethodEntry.getValue();
　　　　　　　　　　　　
　　　　　　　　　　　　// 獲取請求方式GET/POST/PUT/DELETE（如果@RequestMapping中沒有寫具體的請求方式則獲取不到哦）
                    RequestMethodsRequestCondition methodCondition = requestMappingInfo.getMethodsCondition();
　　　　　　　　　　　　Iterator<String> it = methodCondition.getMethods().iterator();
　　　　　　　　　　　　String requestType = it.hasNext()? it.next().name : "";                   

　　　　　　　　　　　　// 獲取請求的URL
                    PatternsRequestCondition patternsCondition = requestMappingInfo.getPatternsCondition();
　　　　　　　　　　　　Iterator<String> iterator = patternsCondition.getPatterns().iterator();
　　　　　　　　　　　　String requestUrl = iterator.hasNext()? iterator.next() : "";
                    //String requestUrl = SetUtils.first(patternsCondition.getPatterns());

　　　　　　　　　　　　//獲取接口所在的類名,方法名,參數名
                    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;
            }
        }
　　　　　//轉化成json打印輸出至控制台
　　　　　String s=JSON.toJSONString(requestToMethodItemList);
　　　　　System.out.println("List:"+s);
        return new ModelAndView("index").addObject("MethodList", requestToMethodItemList);
    }

3.結果

{
    "controllerName": "class com.gy.abc.RPCService",
    "methodName": "readMessage",
    "methodParmaTypes": ["java.lang.Integer"],
    "requestType": "",//注意：如果注解中沒有寫明請求方式，則此處會為空
    "requestUrl": "/xxx/xxx/message"
}

備注：以上方法親測可用，不足之處還望指點！

以上內容參考：

https://www.cnblogs.com/yuananyun/archive/2014/08/25/3934371.html

https://www.cnblogs.com/zhang-cb/p/9890900.html

如需詳細了解RequestCondition請移步https://blog.csdn.net/andy_zhang2007/article/details/88913776