java - Spring Rest Controller @RequestBody 用于除类之外的接口(interface)

Question

我使用带有 POST 请求方法的 Spring Boot Rest Controller ，具有 url (/add) 来保存 JSON 对象，但是在 RequestBody 中它接受接口(interface)，除了类(class)。

Controller 中的方法:(IVehicle 是一个接口(interface))

@CrossOrigin 
@RequestMapping(value = "/add", method = RequestMethod.POST) 
public ResponseEntity<IVehicle> addVehicle(@RequestBody IVehicle vehicle) {

    vehicleService.addVehicle(vehicle); 
    return new ResponseEntity<IVehicle>(vehicleHttpStatus.CREATED); 

}

注意:IVehicle是一个接口(interface)。

JSON 对象通过 AngularJS 传递:

$http({

    method : 'POST',
    url : '../localhost/vehicle/add',
    data : $scope.vehicle,
    dataType : 'json',
    headers : {'Content-Type' : 'application/json; charset=utf-8'}

    }).then(function(response) {
        console.log( response );

    }, function(error) {
        console.log( error );

});

ERROR [nio-8080-exec-5] .w.s.m.s.DefaultHandlerExceptionResolver : Failed to read HTTP message: org.springframework.http.converter.HttpMessageNotReadableException: JSON parse error: Can not construct instance of com.matrix.domain.ui.IVehicle: abstract types either need to be mapped to concrete types, have custom deserializer, or contain additional type information; nested exception is com.fasterxml.jackson.databind.JsonMappingException: Can not construct instance of com.matrix.domain.ui.IVehicle: abstract types either need to be mapped to concrete types, have custom deserializer, or contain additional type information at [Source: java.io.PushbackInputStream@5c46d800; line: 1, column: 1]

请指导我如何访问 JSON 对象 $scope.vehicle 作为 Rest Controller 中的接口(interface)，我将非常感谢你。

谢谢

Answer 1

假设您的 IVehicle 接口(interface)可以用一个类来表示，也就是说，该类具有 IVehicle 接口(interface)的所有属性。我们将其命名为 MyVehicle

将以下内容添加到您的界面:

@JsonDeserialize(as = MyVehicle.class)
public interface IVehicle