尝试将数据从 js 发布到 Spring Boot 控制器

Question

我正在尝试从这个 js 发布我的数据

$.ajax({
        type: 'POST',
        url: '/url',
        data: {
            arr: tdValues
        },
        success: function () {
            location.reload();
        }
    });

控制器中的所有代码都可以正常工作，并且来自 js 的数据不为空

 @PostMapping("/url")
 public ModelAndView deleteQuestions(@RequestParam(value = "arr[]") String[] tdValues) {
 ModelAndView modelAndView = new ModelAndView();
 modelAndView.setViewName("page");
 return modelAndView;
}

但在那之后我得到异常

Required String[] parameter 'arr[]' is not present

有什么建议可以解决吗？

堆栈跟踪：

必需的 String[] 参数 'arr' 不存在；org.springframework.web.bind.MissingServletRequestParameterException: 必需的 String[] 参数 'arr' 不存在于 org.springframework.web.method.annotation.RequestParamMethodArgumentResolver.handleMissingValue (RequestParamMethodArgumentResolver.java:198) at org.springframework.web.method.support.HandlerMethodArgumentResolverComposite.resolveArgument(HandlerMethodArgumentResolverComposite.java:109) org.springframework.web.method.support.InvocableHandlerMethod.getMethodArgumentValues(InvocableHandlerMethod.java:158) 在 org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:128) 在 org.springframework.web.servlet。 mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:97) 在 org. springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:827) at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:738) at org. springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85) 在 org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:967) 在 org.springframework.web.servlet.DispatcherServlet。 doService(DispatcherServlet.java:901) 在 org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970) 在 org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:872) 在 javax.servlet .http.HttpServlet.service(HttpServlet.java:661) 在 org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846) 在 javax.servlet.http.HttpServlet.service(HttpServlet.java:742) 在org.apache.catalina.c ore.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231) 在 org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) 在 org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java: 52) 在 org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) 在 org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) 在 org.springframework.security.web.FilterChainProxy $VirtualFilterChain.doFilter(FilterChainProxy.java:317) at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:127) at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.doFilter (FilterSecurityInterceptor.java:91) 在 org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331) 在 org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFi lter.java:114) 在 org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331) 在 org.springframework.security.web.session.SessionManagementFilter.doFilter(SessionManagementFilter.java:137) 在 org .springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331) at org.springframework.security.web.authentication.AnonymousAuthenticationFilter.doFilter(AnonymousAuthenticationFilter.java:111) at org.springframework.security.web.FilterChainProxy $VirtualFilterChain.doFilter(FilterChainProxy.java:331) at org.springframework.security.web.authentication.rememberme.RememberMeAuthenticationFilter.doFilter(RememberMeAuthenticationFilter.java:158) at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy .java:331）在 org.springframework 的 org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter.doFilter(SecurityContextHolderAwareRequestFilter.java:170)。 security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331) at org.springframework.security.web.savedrequest.RequestCacheAwareFilter.doFilter(RequestCacheAwareFilter.java:63) at org.springframework.security.web.FilterChainProxy$VirtualFilterChain。 doFilter(FilterChainProxy.java:331) at org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.doFilter(AbstractAuthenticationProcessingFilter.java:200) at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)在 org.springframework.security.web.authentication.logout.LogoutFilter.doFilter(LogoutFilter.java:116) 在 org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331) 在 org.springframework.security .web.header.HeaderWriterFilter.doFilterInternal(HeaderWriterFilter.java:64) 在 org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) 在 org.springframework。 security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331) 在 org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:105) 在 org.springframework.security.web.FilterChainProxy$VirtualFilterChain。 doFilter(FilterChainProxy.java:331) at org.springframework.security.web.context.request.async.WebAsyncManagerIntegrationFilter.doFilterInternal(WebAsyncManagerIntegrationFilter.java:56) at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java: 107) 在 org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:214) 在 org.springframework.security.web 的 org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331) .FilterChainProxy.doFilter(FilterChainProxy.java:177) 在 org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:347) 在 org.springframework.web.filter.De legatingFilterProxy.doFilter(DelegatingFilterProxy.java:263) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at org .springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99) 在 org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) 在 org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain .java:193) 在 org.springframework.web.filter.HttpPutFormContentFilter.doFilterInternal(HttpPutFormContentFilter.java:108) 在 org.springframework.web 的 org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)。 filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) 在 org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) 在 org.apache.catalina.core.ApplicationFilterCh ain.doFilter(ApplicationFilterChain.java:166) at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:81) at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) at org .apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) 在 org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) 在 org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter .java:197) 在 org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) 在 org.apache.catalina 的 org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)。 core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:199) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextVal ve.java:96) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:478) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140) at org.apache.catalina .valves.ErrorReportValve.invoke(ErrorReportValve.java:81) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:342 ) 在 org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:803) 在 org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66) 在 org.apache.coyote.AbstractProtocol$ConnectionHandler.process( AbstractProtocol.java:868) 在 org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1459) 在 org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)在 java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) 在 java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExec utor.java:624) 在 org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) 在 java.lang.Thread.run(Thread.java:748)

Answer 1

我的问题通过这种方式解决了：

public @ResponseBody ModelAndView deleteQuestions(@RequestParam("arr") Optional<String[]> tdValues) {}

还有这个 JS：

$.ajax({
        type: 'POST',
        url: '/url?arr='+tdValues,
        error : function() {
            console.log("error");
        },
        success: function () {
            location.reload()
        }
    });

Answer 2

将所需的属性（设置为 false）添加到 @RequestParam。

public ModelAndView deleteQuestions(@RequestParam(required=false, value = "arr[]") String[] tdValues) {

或者试试

public ModelAndView deleteQuestions(@RequestParam(value = "arr") String[] tdValues) {

Answer 3

几个变化。

1. 在您的 Js 代码中。

   $.ajax({
       type: 'POST',
       url: '/url/?arr='+tdValues
       success: function () {
           location.reload();
       }
   });  
   

2. 在您的控制器代码中，执行此操作。

   public ModelAndView deleteQuestions(@RequestParam(value = "arr") String[] tdValues) {