获取一个Java项目的所有接口信息

1.建立一个实体类

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.从springbean容器中获取所有的实例bean封装成list转化成json输出

　　@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);

        //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())
                {
　　　　　　　　　　　　// 获取实体对象
                    RequestMappingInfo requestMappingInfo = requestMappingInfoHandlerMethodEntry.getKey();
                    HandlerMethod mappingInfoValue = requestMappingInfoHandlerMethodEntry.getValue();
　　　　　　　　　　　　
　　　　　　　　　　　　// 获取请求方式GET/POST/PUT/DELETE（如果@RequestMapping中没有写具体的请求方式则获取不到哦）
                    RequestMethodsRequestCondition methodCondition = requestMappingInfo.getMethodsCondition();
　　　　　　　　　　　　Iterator<String> it = methodCondition.getMethods().iterator();
　　　　　　　　　　　　String requestType = it.hasNext()? it.next().name : "";                   

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

　　　　　　　　　　　　//获取接口所在的类名,方法名,参数名
                    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;
            }
        }
　　　　　//转化成json打印输出至控制台
　　　　　String s=JSON.toJSONString(requestToMethodItemList);
　　　　　System.out.println("List:"+s);
        return new ModelAndView("index").addObject("MethodList", requestToMethodItemList);
    }

3.结果

{
    "controllerName": "class com.gy.abc.RPCService",
    "methodName": "readMessage",
    "methodParmaTypes": ["java.lang.Integer"],
    "requestType": "",//注意：如果注解中没有写明请求方式，则此处会为空
    "requestUrl": "/xxx/xxx/message"
}

备注：以上方法亲测可用，不足之处还望指点！

以上内容参考：

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

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

如需详细了解RequestCondition请移步https://blog.csdn.net/andy_zhang2007/article/details/88913776