Question

来自此网址想提取pdf名称

localhost:port/server/InboundGateway/pdf/

<int-http:inbound-gateway id="InboundGateway"
    request-channel="request" reply-channel="response"  supported-methods="GET,POST"
    request-payload-type="java.lang.String" path="/InboundGateway/{type}"
    <int-http:header name="type" expression="#pathVariables.type" />
</int-http:inbound-gateway>

在上面的代码中（int-http：header name =＆＃34; type＆＃34;）类型将是pdf 但是如何在java代码中提取它的值我无法获得HttpServletRequest

我在支持方法

的基础上进行路由

<int:router input-channel="request" expression="headers.http_requestMethod">
    <int:mapping value="POST" channel="contentDownload" />
</int:router>

<int:service-activator input-channel="contentDownload"
    method="extract" ref="downloadPayloadExtractor" output-channel="contentRouter"></int:service-activator>

在DownloadPayloadExtractor中的

我想得到PathVariable

这些是日志的

SEVERE: Servlet.service() for servlet [InboundGateway] in context with path [/mgl-crm-server] threw exception

org.springframework.integration.MessageHandlingException：java.lang.IllegalArgumentException：必需的标头不可用：type 在org.springframework.integration.handler.MethodInvokingMessageProcessor.processMessage（MethodInvokingMessageProcessor.java:76）在org.springframework.integration.handler.ServiceActivatingHandler.handleRequestMessage（ServiceActivatingHandler.java:64）在org.springframework.integration.handler.AbstractReplyProducingMessageHandler.handleMessageInternal（AbstractReplyProducingMessageHandler.java:98）在org.springframework.integration.handler.AbstractMessageHandler.handleMessage（AbstractMessageHandler.java:78）在org.springframework.integration.dispatcher.UnicastingDispatcher.doDispatch（UnicastingDispatcher.java:110）在org.springframework.integration.dispatcher.UnicastingDispatcher.dispatch（UnicastingDispatcher.java:97）在org.springframework.integration.channel.AbstractSubscribableChannel.doSend（AbstractSubscribableChannel.java:61）在org.springframework.integration.channel.AbstractMessageChannel.send（AbstractMessageChannel.java:157）在org.springframework.integration.channel.AbstractMessageChannel.send（AbstractMessageChannel.java:128）在org.springframework.integration.core.MessagingTemplate.doSend（MessagingTemplate.java:288）在org.springframework.integration.core.MessagingTemplate.send（MessagingTemplate.java:149）在org.springframework.integration.router.AbstractMessageRouter.handleMessageInternal（AbstractMessageRouter.java:220）在org.springframework.integration.handler.AbstractMessageHandler.handleMessage（AbstractMessageHandler.java:78）在org.springframework.integration.dispatcher.UnicastingDispatcher.doDispatch（UnicastingDispatcher.java:110）在org.springframework.integration.dispatcher.UnicastingDispatcher.dispatch（UnicastingDispatcher.java:97）在org.springframework.integration.channel.AbstractSubscribableChannel.doSend（AbstractSubscribableChannel.java:61）在org.springframework.integration.channel.AbstractMessageChannel.send（AbstractMessageChannel.java:157）在org.springframework.integration.core.MessagingTemplate.doSend（MessagingTemplate.java:288）在org.springframework.integration.core.MessagingTemplate.doSendAndReceive（MessagingTemplate.java:318）在org.springframework.integration.core.MessagingTemplate.sendAndReceive（MessagingTemplate.java:239）在org.springframework.integration.gateway.MessagingGatewaySupport.doSendAndReceive（MessagingGatewaySupport.java:233）在org.springframework.integration.gateway.MessagingGatewaySupport.sendAndReceiveMessage（MessagingGatewaySupport.java:207）在org.springframework.integration.http.inbound.HttpRequestHandlingEndpointSupport.doHandleRequest（HttpRequestHandlingEndpointSupport.java:271）在org.springframework.integration.http.inbound.HttpRequestHandlingMessagingGateway.handleRequest（HttpRequestHandlingMessagingGateway.java:95）在org.springframework.web.context.support.HttpRequestHandlerServlet.service(HttpRequestHandlerServlet.java:67）在javax.servlet.http.HttpServlet.service（HttpServlet.java:727）在org.apache.catalina.core.ApplicationFilterChain.internalDoFilter（ApplicationFilterChain.java:303）在org.apache.catalina.core.ApplicationFilterChain.doFilter（ApplicationFilterChain.java:208）在org.apache.catalina.core.StandardWrapperValve.invoke（StandardWrapperValve.java:220）在org.apache.catalina.core.StandardContextValve.invoke（StandardContextValve.java:122）在org.apache.catalina.authenticator.AuthenticatorBase.invoke（AuthenticatorBase.java:501） at org.apache.catalina.core.StandardHostValve.invoke（StandardHostValve.java:171）在org.apache.catalina.valves.ErrorReportValve.invoke（ErrorReportValve.java:103）在org.apache.catalina.valves.AccessLogValve.invoke（AccessLogValve.java:950）在org.apache.catalina.core.StandardEngineValve.invoke（StandardEngineValve.java:116）在org.apache.catalina.connector.CoyoteAdapter.service（CoyoteAdapter.java:408）在org.apache.coyote.http11.AbstractHttp11Processor.process（AbstractHttp11Processor.java:1070） at org.apache.coyote.AbstractProtocol $ AbstractConnectionHandler.process（AbstractProtocol.java:611） at org.apache.tomcat.util.net.JIoEndpoint $ SocketProcessor.run（JIoEndpoint.java:314） at java.util.concurrent.ThreadPoolExecutor $ Worker.runTask（ThreadPoolExecutor.java:886） at java.util.concurrent.ThreadPoolExecutor $ Worker.run（ThreadPoolExecutor.java:908） at org.apache.tomcat.util.threads.TaskThread $ WrappingRunnable.run（TaskThread.java:61）在java.lang.Thread.run（Thread.java:662）引起：java.lang.IllegalArgumentException：必需的标头不可用：类型在org.springframework.util.Assert.isTrue（Assert.java:65） at sun.reflect.NativeMethodAccessorImpl.invoke0（Native Method） at sun.reflect.NativeMethodAccessorImpl.invoke（NativeMethodAccessorImpl.java:39） at sun.reflect.DelegatingMethodAccessorImpl.invoke（DelegatingMethodAccessorImpl.java:25）在java.lang.reflect.Method.invoke（Method.java:597）在org.springframework.expression.spel.support.ReflectiveMethodExecutor.execute（ReflectiveMethodExecutor.java:58）在org.springframework.expression.spel.ast.MethodReference.getValueInternal（MethodReference.java:104）在org.springframework.expression.spel.ast.CompoundExpression.getValueInternal（CompoundExpression.java:57）在org.springframework.expression.spel.ast.Ternary.getValueInternal（Ternary.java:55）在org.springframework.expression.spel.ast.MethodReference.getValueInternal（MethodReference.java:60）在org.springframework.expression.spel.ast.CompoundExpression.getValueInternal（CompoundExpression.java:57）在org.springframework.expression.spel.ast.SpelNodeImpl.getTypedValue（SpelNodeImpl.java:102）在org.springframework.expression.spel.standard.SpelExpression.getValue（SpelExpression.java:102）在org.springframework.integration.util.AbstractExpressionEvaluator.evaluateExpression（AbstractExpressionEvaluator.java:126）在org.springframework.integration.util.MessagingMethodInvokerHelper.processInternal（MessagingMethodInvokerHelper.java:225）在org.springframework.integration.util.MessagingMethodInvokerHelper.process（MessagingMethodInvokerHelper.java:125）在org.springframework.integration.handler.MethodInvokingMessageProcessor.processMessage（MethodInvokingMessageProcessor.java:73） ......还有42个

Answer 1

由于Framewrok与Message<?>达成交易，您确实可以正确地将PathVariable填充到MessageHeaders。

改善代码的唯一一件事就是问题＆＃34;如何访问type标题？＆＃34;。那么，你应该改进POJO方法：

public Object extract(Object payload, @Header("type") String type) {
....
}

这就是全部。

查看Reference Manual中的更多信息。

<强>更新

所需的标头不可用：输入

好吧，将其添加到您的配置中：

<wire-tap channel="logging">

<logging-channel-adapter id="logging" log-full-message="true" level="ERROR"/>

在收到请求后直到该异常分享日志。

使用spring集成获取PathVariable

1 个答案: