Question

我想在＆＃34;产品＆＃34;上转换现有的Ajax调用。下拉选择在后端调用servlet，返回产品数据。但说实话，这远远高于我的技能（在Jquery非常初级）。

这是我目前的JavaScript：

Caused by: org.springframework.messaging.MessagingException: Local file downloads\myFile.xml.2015-04-14 already exists
at org.springframework.integration.file.remote.gateway.AbstractRemoteFileOutboundGateway.get(AbstractRemoteFileOutboundGateway.java:700)
at org.springframework.integration.file.remote.gateway.AbstractRemoteFileOutboundGateway$2.doInSession(AbstractRemoteFileOutboundGateway.java:436)
at org.springframework.integration.file.remote.gateway.AbstractRemoteFileOutboundGateway$2.doInSession(AbstractRemoteFileOutboundGateway.java:432)
at org.springframework.integration.file.remote.RemoteFileTemplate.execute(RemoteFileTemplate.java:334)
at org.springframework.integration.file.remote.gateway.AbstractRemoteFileOutboundGateway.doGet(AbstractRemoteFileOutboundGateway.java:432)
at org.springframework.integration.file.remote.gateway.AbstractRemoteFileOutboundGateway.handleRequestMessage(AbstractRemoteFileOutboundGateway.java:394)
at org.springframework.integration.handler.AbstractReplyProducingMessageHandler.handleMessageInternal(AbstractReplyProducingMessageHandler.java:99)
at org.springframework.integration.handler.AbstractMessageHandler.handleMessage(AbstractMessageHandler.java:78)
at org.springframework.integration.handler.MessageHandlerChain$1.send(MessageHandlerChain.java:123)
at org.springframework.messaging.core.GenericMessagingTemplate.doSend(GenericMessagingTemplate.java:115)
at org.springframework.messaging.core.GenericMessagingTemplate.doSend(GenericMessagingTemplate.java:45)
at org.springframework.messaging.core.AbstractMessageSendingTemplate.send(AbstractMessageSendingTemplate.java:95)
at org.springframework.integration.handler.AbstractMessageProducingHandler.sendOutput(AbstractMessageProducingHandler.java:248)
at org.springframework.integration.handler.AbstractMessageProducingHandler.produceOutput(AbstractMessageProducingHandler.java:171)
at org.springframework.integration.handler.AbstractMessageProducingHandler.sendOutputs(AbstractMessageProducingHandler.java:119)
at org.springframework.integration.handler.AbstractReplyProducingMessageHandler.handleMessageInternal(AbstractReplyProducingMessageHandler.java:105)
at org.springframework.integration.handler.AbstractMessageHandler.handleMessage(AbstractMessageHandler.java:78)
at org.springframework.integration.handler.MessageHandlerChain$1.send(MessageHandlerChain.java:123)
at org.springframework.messaging.core.GenericMessagingTemplate.doSend(GenericMessagingTemplate.java:115)
at org.springframework.messaging.core.GenericMessagingTemplate.doSend(GenericMessagingTemplate.java:45)
at org.springframework.messaging.core.AbstractMessageSendingTemplate.send(AbstractMessageSendingTemplate.java:95)
at org.springframework.integration.handler.AbstractMessageProducingHandler.sendOutput(AbstractMessageProducingHandler.java:248)
at org.springframework.integration.handler.AbstractMessageProducingHandler.produceOutput(AbstractMessageProducingHandler.java:171)
at org.springframework.integration.splitter.AbstractMessageSplitter.produceOutput(AbstractMessageSplitter.java:129)
at org.springframework.integration.handler.AbstractMessageProducingHandler.sendOutputs(AbstractMessageProducingHandler.java:119)
at org.springframework.integration.handler.AbstractReplyProducingMessageHandler.handleMessageInternal(AbstractReplyProducingMessageHandler.java:105)
at org.springframework.integration.handler.AbstractMessageHandler.handleMessage(AbstractMessageHandler.java:78)
at org.springframework.integration.handler.MessageHandlerChain$1.send(MessageHandlerChain.java:123)
at org.springframework.messaging.core.GenericMessagingTemplate.doSend(GenericMessagingTemplate.java:115)
at org.springframework.messaging.core.GenericMessagingTemplate.doSend(GenericMessagingTemplate.java:45)
at org.springframework.messaging.core.AbstractMessageSendingTemplate.send(AbstractMessageSendingTemplate.java:95)
at org.springframework.integration.handler.AbstractMessageProducingHandler.sendOutput(AbstractMessageProducingHandler.java:248)
at org.springframework.integration.handler.AbstractMessageProducingHandler.produceOutput(AbstractMessageProducingHandler.java:171)
at org.springframework.integration.handler.AbstractMessageProducingHandler.sendOutputs(AbstractMessageProducingHandler.java:119)
at org.springframework.integration.handler.AbstractReplyProducingMessageHandler.handleMessageInternal(AbstractReplyProducingMessageHandler.java:105)
at org.springframework.integration.handler.AbstractMessageHandler.handleMessage(AbstractMessageHandler.java:78)
at org.springframework.integration.handler.MessageHandlerChain.handleMessageInternal(MessageHandlerChain.java:104)
at org.springframework.integration.handler.AbstractMessageHandler.handleMessage(AbstractMessageHandler.java:78)
at org.springframework.integration.dispatcher.AbstractDispatcher.tryOptimizedDispatch(AbstractDispatcher.java:116)
... 7 more

getProductInfo servlet首先返回以下内容：

function updateProductParameters() {
    var url = "/getProductInfo?productID=";
    var http = getHTTPObject();
    var productIDValue = document.getElementById("product").value;
    http.open("GET", url + escape(productIDValue), true);
    http.onreadystatechange = handleHttpResponse;
    http.send(null);
}

function handleHttpResponse() {
    if (http.readyState == 4) {
        if (http.status == 200) {
            var message = http.responseXML.getElementsByTagName("message")[0];
            results = message.childNodes[0].nodeValue.split(",");
            var product_size = results[0];
            var product_weight = results[1];
            var product_price = results[2];
        } else {
            alert ( "Not able to retrieve Product data" );
        }
    }   
}

如果您能告诉我如何将其转换为Jquery，我将非常感激！

Answer 1

我可以看到它在firebug中调用了具有正确ID的servlet，我可以看到servlet返回消息，但我的成功函数没有执行。

$("#product").change(function(){
        var productID = $('#product').val();
        $.ajax({
        url: "/getProductInfo",
        type: "GET",
        dataType: "json",
        cache: false,
        data: { 'productID': productID  },
        success: function() { alert("here"); }
        });
});

Answer 2

function updateProductParameters(){
   $.ajax({
    url: "your_url", success: function(result){
     //DO STG WITH YOUR RESULT
  }});
});

将旧时尚Ajax调用转换为Jquery

2 个答案: