上一节当中提及swagger读取@ApiImplicitParam注解的required参数，最终会体现在js上，通过浏览器F12的追踪，定位到swaggerbootstrapui.js文件上，这里摘抄部分源码：
# 点击发送按钮时，逐行读取参数信息，并提取required参数 paramBody.find("tr").each(function () { var paramtr=$(this); var cked=paramtr.find("td:first").find(":checked").prop("checked"); var _urlAppendflag=true; //that.log(cked) if (cked){ //如果选中，留意此行的required:paramtr.data("required")信息提取 var trdata={name:paramtr.find("td:eq(2)").find("input").val(),in:paramtr.data("in"),required:paramtr.data("required"),type:paramtr.data("type"),emflag:paramtr.data("emflag"),schemavalue:paramtr.data("schemavalue")}; //that.log("trdata....") //that.log(trdata); //获取key //var key=paramtr.find("td:eq(1)").find("input").val(); var key=trdata["name"]; //获取value var value=""; var reqflag=false; // 后面代码省略 } })js上判断该属性required是否为true的处理，js源码如下：
//判断是否required if (trdata.hasOwnProperty("required")){ var required=trdata["required"]; if (required){ if(!reqflag){ //必须,验证value是否为空 if(value==null||value==""){ validateflag=true; var des=trdata["name"] //validateobj={message:des+"不能为空"}; validateobj={message:des+i18n.message.debug.fieldNotEmpty}; return false; } } } } SpringCloud业务模块部分swagger前端js验证通过可以向后台发送请求，或者使用postman向后台系统发送请求时，开始进入后台的一系列过滤器、Servlet处理，东西还不少：
// 实际的业务方法部分 auth:28, DemoController (com.hy.demo.controller) invoke0:-1, NativeMethodAccessorImpl (sun.reflect) invoke:62, NativeMethodAccessorImpl (sun.reflect) invoke:43, DelegatingMethodAccessorImpl (sun.reflect) invoke:498, Method (java.lang.reflect) // 请求参数的提取、控制部分 doInvoke:190, InvocableHandlerMethod (org.springframework.web.method.support) invokeForRequest:138, InvocableHandlerMethod (org.springframework.web.method.support) invokeAndHandle:104, ServletInvocableHandlerMethod (org.springframework.web.servlet.mvc.method.annotation) invokeHandlerMethod:892, RequestMappingHandlerAdapter (org.springframework.web.servlet.mvc.method.annotation) handleInternal:797, RequestMappingHandlerAdapter (org.springframework.web.servlet.mvc.method.annotation) handle:87, AbstractHandlerMethodAdapter (org.springframework.web.servlet.mvc.method) // 下面是各种基础Web服务组件的过滤器等，暂时不关心 doDispatch:1039, DispatcherServlet (org.springframework.web.servlet) doService:942, DispatcherServlet (org.springframework.web.servlet) processRequest:1005, FrameworkServlet (org.springframework.web.servlet) doGet:897, FrameworkServlet (org.springframework.web.servlet) service:634, HttpServlet (javax.servlet.http) service:882, FrameworkServlet (org.springframework.web.servlet) service:741, HttpServlet (javax.servlet.http) internalDoFilter:231, ApplicationFilterChain (org.apache.catalina.core) doFilter:166, ApplicationFilterChain (org.apache.catalina.core) doFilter:53, WsFilter (org.apache.tomcat.websocket.server) internalDoFilter:193, ApplicationFilterChain (org.apache.catalina.core) doFilter:166, ApplicationFilterChain (org.apache.catalina.core) doFilter:84, SecurityBasicAuthFilter (com.github.xiaoymin.swaggerbootstrapui.filter) internalDoFilter:193, ApplicationFilterChain (org.apache.catalina.core) doFilter:166, ApplicationFilterChain (org.apache.catalina.core) doFilter:53, ProductionSecurityFilter (com.github.xiaoymin.swaggerbootstrapui.filter) internalDoFilter:193, ApplicationFilterChain (org.apache.catalina.core) doFilter:166, ApplicationFilterChain (org.apache.catalina.core) doFilter:124, WebStatFilter (com.alibaba.druid.support.http) internalDoFilter:193, ApplicationFilterChain (org.apache.catalina.core) doFilter:166, ApplicationFilterChain (org.apache.catalina.core) doFilterInternal:88, HttpTraceFilter (org.springframework.boot.actuate.web.trace.servlet) doFilter:109, OncePerRequestFilter (org.springframework.web.filter) internalDoFilter:193, ApplicationFilterChain (org.apache.catalina.core) doFilter:166, ApplicationFilterChain (org.apache.catalina.core) doFilterInternal:99, RequestContextFilter (org.springframework.web.filter) doFilter:109, OncePerRequestFilter (org.springframework.web.filter) internalDoFilter:193, ApplicationFilterChain (org.apache.catalina.core) doFilter:166, ApplicationFilterChain (org.apache.catalina.core) doFilterInternal:92, FormContentFilter (org.springframework.web.filter) doFilter:109, OncePerRequestFilter (org.springframework.web.filter) internalDoFilter:193, ApplicationFilterChain (org.apache.catalina.core) doFilter:166, ApplicationFilterChain (org.apache.catalina.core) doFilterInternal:93, HiddenHttpMethodFilter (org.springframework.web.filter) doFilter:109, OncePerRequestFilter (org.springframework.web.filter) internalDoFilter:193, ApplicationFilterChain (org.apache.catalina.core) doFilter:166, ApplicationFilterChain (org.apache.catalina.core) filterAndRecordMetrics:114, WebMvcMetricsFilter (org.springframework.boot.actuate.metrics.web.servlet) doFilterInternal:104, WebMvcMetricsFilter (org.springframework.boot.actuate.metrics.web.servlet) doFilter:109, OncePerRequestFilter (org.springframework.web.filter) internalDoFilter:193, ApplicationFilterChain (org.apache.catalina.core) doFilter:166, ApplicationFilterChain (org.apache.catalina.core) doFilterInternal:200, CharacterEncodingFilter (org.springframework.web.filter) doFilter:109, OncePerRequestFilter (org.springframework.web.filter) internalDoFilter:193, ApplicationFilterChain (org.apache.catalina.core) doFilter:166, ApplicationFilterChain (org.apache.catalina.core) invoke:202, StandardWrapperValve (org.apache.catalina.core) invoke:96, StandardContextValve (org.apache.catalina.core) invoke:490, AuthenticatorBase (org.apache.catalina.authenticator) invoke:139, StandardHostValve (org.apache.catalina.core) invoke:92, ErrorReportValve (org.apache.catalina.valves) invoke:74, StandardEngineValve (org.apache.catalina.core) service:343, CoyoteAdapter (org.apache.catalina.connector) service:408, Http11Processor (org.apache.coyote.http11) process:66, AbstractProcessorLight (org.apache.coyote) process:853, AbstractProtocol$ConnectionHandler (org.apache.coyote) doRun:1587, NioEndpoint$SocketProcessor (org.apache.tomcat.util.net) run:49, SocketProcessorBase (org.apache.tomcat.util.net) runWorker:1149, ThreadPoolExecutor (java.util.concurrent) run:624, ThreadPoolExecutor$Worker (java.util.concurrent) run:61, TaskThread$WrappingRunnable (org.apache.tomcat.util.threads) run:748, Thread (java.lang)