如何在 java 格式的 json 控制器中编写 Web 服务

Question

尝试在 java spring 启动应用程序中使用 json 数据时，从 web 中的 postmain 或应用程序收到错误的请求消息。找不到根本原因。

Json申请中使用的格式如下

{
    "stateOfCharge": 30,
    "timeSpendAtDest": 30,
    "userId": 3745,
    "distanceInMeters": 2478.91864342829,
    "stationsList": [{
        "csId": 50,
        "csLat": 17.491125,
        "csLng": 78.397686,
        "energyLevel": "LEVEL1",
        "maxChargeTimeInMins": 720,
        "outPutRateInKw": 2,
        "price": 0.8,
        "distance": 126.31235091469274
    }, {
        "csId": 52,
        "csLat": 17.491168,
        "csLng": 78.398331,
        "energyLevel": "LEVEL2",
        "maxChargeTimeInMins": 480,
        "outPutRateInKw": 19,
        "price": 2.5,
        "distance": 85.98535639001425
    }, {
        "csId": 50,
        "csLat": 17.491125,
        "csLng": 78.397686,
        "energyLevel": "DCFAST",
        "maxChargeTimeInMins": 30,
        "outPutRateInKw": 350,
        "price": 15,
        "distance": 126.31235091469274
    }]
}

这样写的控制器在 java

中收到 400 个错误的请求响应

@PostMapping("/stations")
    @ApiOperation(value = "Get charging stations around 400 radius from the charging location.")
    @ApiResponses(value = { 
            @ApiResponse(code = 200, message = "Success"),
    })
    public void findChargingStations(
            @ApiParam(value = "stateOfCharge") @NotNull @RequestParam Integer stateOfCharge,
            @ApiParam(value = "timeSpendAtDest") @NotNull @RequestParam Integer timeSpendAtDest,
            @ApiParam(value = "userId") @NotNull @RequestParam Integer userId,
            @ApiParam(value = "distanceInMeters") @NotNull @RequestParam Integer distanceInMeters,
            @RequestBody(value = "stationsList") @NotNull @RequestParam FindStations stationsList
            ) throws Exception {
        this.findChargingStationsService.getFilteredStations(stateOfCharge, timeSpendAtDest, userId, distanceInMeters,stationsList);
        return;
        }

FindStations 是映射字段的任何接口

public interface FindStations {
    int getCsId();
    double getCsLat();
    double getCsLng();
    float getPrice();
    String getEnergyLevel();
    int getMaxChargeTimeInMins();
    int getOutPutRateInKw();
    int getDistance();
}

谁能帮忙解决问题

Answer 1

您正在向后端发送一些复杂的数据。您可能希望在请求正文中发送它，而不是作为请求参数。

您可以使用 @RequestBody。

首先，让我们创建一些 DTO 类来处理从前端发送的数据：

public class StationRequest {
    private int stateOfCharge;
    private int timeSpendAtDest;
    private int userId;
    private double distanceInMeters;
    private List<Station> stationsList;

    public int getStateOfCharge() {
        return stateOfCharge;
    }

    public void setStateOfCharge(int stateOfCharge) {
        this.stateOfCharge = stateOfCharge;
    }

    // Other getters and setters omitted for readability. You may want to consider project Lombok
}

public class Station {
    private int csId;
    private double csLat;
    private double csLng;
    private String energyLevel;
    private int maxChargeTimeInMins;
    private int outPutRateInKw;
    private double price;
    private double distance;
  
    // Getters and setter omitted.
}

让我们创建控制器：

@PostMapping("/stations")
public void findChargingStations(@RequestBody StationRequest stationRequest) {
    // Do some business logic
}

如何在 java 格式的 json 控制器中编写 Web 服务

How to write web service in contrroller for this formated json in java

java

spring

web-services

spring-boot

angular