Cannot generate variable name for non-typed Collection parameter type] with root cause
阿新 • • 發佈:2018-12-15
1.問題描述:
前端在呼叫後端的時候,報500 nested exception is java.lang.IllegalArgumentException: Cannot generate variable name for non-typed Collection parameter type] with root cause異常:
經查詢翻譯:大概解釋說是無法生成非型別化集合引數型別的變數名稱,
我的controller層程式碼如下:根據上述判斷為我的請求接收引數cartList異常,而後判斷是要加泛型,這樣請求引數cartList才能完成對映接收關係,否則,其內部元素找不到匹配的型別;
@RestController @RequestMapping("cart") public class CartController { @Reference private CartService cartService; @RequestMapping("addItemToCartList") public LoginResult addItemToCartList(@RequestBody List cartList, Long itemId, Integer num){ cartList = cartService.addItemToCartList(cartList, itemId, num); LoginResult result = new LoginResult(true,null,cartList); return result; }
2.解決方案:
在List後加泛型進行約束,當然,這個看你自己具體的程式碼.
addItemToCartList(@RequestBody List<Cart> cartList, Long itemId, Integer num)
完美解決問題!