Spring MVC Rest-URL上的多個參數

Question

我有“運輸經理”應用程序。 它是一個簡單的應用程序，用於測試如何使用Spring框架。 我已經創建了用於向數據庫（Spring Data）添加新傳輸的終結點，並且工作正常。 我添加了一些公交，現在我想獲取每日報告，在這里我遇到了問題。 這是端點的外觀：

GET http://example.com/reports/daily?start_date=YYYY-MM-DD&end_date=YYYY-MM_DD

和響應（JSON）例如：

{
  "total_distance": "90",
  "total_price":      "115"
}

我該怎么辦？ 我應該在模型類中添加新字段“ startDate”和“ endDate”嗎？

這是我的模型類的外觀：

@Entity
public class Transit {

public Transit() {
}

@Column(name = "id")
@Id
@GeneratedValue
private Long id;
@NotEmpty
private String sourceAddress;
@NotEmpty
private String destinationAddress;
private double price;
private DateTime date;
private Long distance;

public Long getId() {
    return id;
}

public void setId(Long id) {
    this.id = id;
}

public String getSourceAddress() {
    return sourceAddress;
}

public void setSourceAddress(String sourceAddress) {
    this.sourceAddress = sourceAddress;
}

public String getDestinationAddress() {
    return destinationAddress;
}

public void setDestinationAddress(String destinationAddress) {
    this.destinationAddress = destinationAddress;
}

public double getPrice() {
    return price;
}

public void setPrice(double price) {
    this.price = price;
}

public DateTime getDate() {
    return date;
}

public void setDate(DateTime date) {
    this.date = date;
}


public Long getDistance() {
    return distance;
}

public void setDistance(Long distance) {
    this.distance = distance;
}}

存儲庫類：

public interface TransitRepository extends JpaRepository<Transit, Long> {
List<Transit> findAllByStartDateGreaterThanEqualAndEndDateLessThanEqual(DateTime startDate, DateTime endDate);
}

控制器類：

@RestController
@RequestMapping("/transit")
public class TransitController {
private TransitService transitService;

@Autowired
public void setTransitService(TransitService transitService) {
    this.transitService = transitService;
}


@RequestMapping(method = RequestMethod.POST, consumes = MediaType.APPLICATION_JSON_VALUE)
public void addTransit(@RequestBody Transit transit){
    transitService.calculateDistance(transit);
    transitService.addTransit(transit);
    System.out.println(transit);
}

@RequestMapping(path = "reports/daily", method = RequestMethod.GET, consumes = MediaType.APPLICATION_JSON_VALUE)
    public void getDailyReport(){}

}

和服務等級：

@Service
public class TransitService {

private TransitRepository transitRepository;
public static final String API_KEY = "xxxxxx";

@Autowired
public void setTransitRepository(TransitRepository transitRepository) {
    this.transitRepository = transitRepository;
}

public void addTransit(Transit transit) {
    transitRepository.save(transit);
}

public void calculateDistance(Transit transit) {

    GeoApiContext geoApiContext = new GeoApiContext.Builder().apiKey(API_KEY).build();
    DistanceMatrixApiRequest request = DistanceMatrixApi.newRequest(geoApiContext);

    DistanceMatrix result = request.origins(transit.getSourceAddress())
            .destinations(transit.getDestinationAddress())
            .mode(TravelMode.DRIVING)
            .units(Unit.METRIC)
            .awaitIgnoreError();

    long distance = result.rows[0].elements[0].distance.inMeters;
    transit.setDistance(distance);

}

public void countDaily(List<Transit> transitList){

}
}

Answer 1

您應該在需要添加到方法中的參數上使用注釋@RequestParam 。 注釋中的名稱是可選的，默認為參數名稱。

@RequestMapping(path = "reports/daily", method = RequestMethod.GET, consumes = MediaType.APPLICATION_JSON_VALUE)
public void getDailyReport(@RequestParam("start_date") String startDate, @RequestParam String end_date){}

}

將字段添加到您的Transit類中將不起作用，因為GET-Request沒有請求正文，並且參數也始終不在正文中。

Answer 2

您應該在控制器方法中使用@RequestParam批注。

@RequestMapping(path = "reports/daily", method = RequestMethod.GET, consumes = MediaType.APPLICATION_JSON_VALUE)
public void getDailyReport(@RequestParam("start_date") String startDate, @RequestParam("end_date") String endDate){

     // Create a method in service class, that takes startDate and endDate as parameters.

     // And inside that method, you can write a SQL query to find the distance & price for the given date parameters

}