我已经寻找了这个问题的各种可能性，但不知道为什么会发生。它想用javascript在localstorage中保存一个对象，然后获取这个对象并将数据发送到我的spring启动应用程序。但是当我调用ajax时，它会给我一个错误，如下所示

java.lang.IllegalArgumentException: Invalid character found in the request target [/product/cart/items?{%22cartItems%22:[{%22itemId%22:%22asfasfa%22,%22itemCount%22:2},{%22itemId%22:%22ijhar%22,%22itemCount%22:3}]}]. The valid characters are defined in RFC 7230 and RFC 3986
    at org.apache.coyote.http11.Http11InputBuffer.parseRequestLine(Http11InputBuffer.java:491) ~[tomcat-embed-core-9.0.36.jar:9.0.36]
    at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:260) ~[tomcat-embed-core-9.0.36.jar:9.0.36]
    at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65) [tomcat-embed-core-9.0.36.jar:9.0.36]
    at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:868) [tomcat-embed-core-9.0.36.jar:9.0.36]
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1590) [tomcat-embed-core-9.0.36.jar:9.0.36]
    at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) [tomcat-embed-core-9.0.36.jar:9.0.36]
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [na:1.8.0_265]
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [na:1.8.0_265]
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat-embed-core-9.0.36.jar:9.0.36]
    at java.lang.Thread.run(Thread.java:748) [na:1.8.0_265]

javascript代码

$(document).ready(function() {

  function getAllItemsFromCart() {
    let product;
    product = JSON.parse(localStorage.getItem("items"));
    return product;
  }

  let itemsList = {};
  let cartItems = [];
  let items = {};
  items['itemId'] = 'asfasfa';
  items['itemCount'] = 2;
  cartItems.push(items);
  items = {};
  items['itemId'] = 'ijhar';
  items['itemCount'] = 3;
  cartItems.push(items);
  itemsList['cartItems'] = cartItems;

  localStorage.setItem('items', JSON.stringify(itemsList));
  let itemsList1 = getAllItemsFromCart();

  $.ajax({
    url: "[[@{/product/cart/items}]]",
    headers: {
      'Accept': 'application/json',
      'Content-Type': 'application/json'
    },
    method: "GET",
    data: JSON.stringify(itemsList1),
    dataType: "json",
    success: function(response, status, xhr) {
      console.log("This is success message")
    },
    error: function(response) {
      console.debug(response.status + ":" + response.statusText);
    },
    beforeSend: function() {
      //talman.showAjaxLoader();
    },
    complete: function() {
      //talman.closeAjaxLoader();
    }

  });
});

java控制器

@GetMapping(value = "/cart/items",consumes = "application/json", produces = "application/json")
@ResponseBody
public String addProductToCart(@RequestBody CartItemsBean itemList){  
   return "sucess";
}

豆

class ItemsBean {
    private String itemId;
    private String itemCount;

    public String getItemId() {
        return itemId;
    }

    public void setItemId(String itemId) {
        this.itemId = itemId;
    }

    public String getItemCount() {
        return itemCount;
    }

    public void setItemCount(String itemCount) {
        this.itemCount = itemCount;
    }
}

public class CartItemsBean {
    private List<ItemsBean> cartItems;

    public List<ItemsBean> getCartItems() {
        return cartItems;
    }

    public void setCartItems(List<ItemsBean> cartItems) {
        this.cartItems = cartItems;
    }
}