我能够从服务器接收响应，但无法访问响应的一部分。不确定如何解决问题。我将RrateInfos更改为数组，但它没有帮助，还检查了所有与我的响应相符的数据类型。
这不是重复，问题不在于nullPointerException它与Web服务和解析响应有关。
换句话说，我知道可以声明ChargeableRateInfo不接收NullPointerExcpetion但问题是当我从服务器收到响应时我需要填充它！
任何帮助都将不胜感激。
响应
<ns2:HotelListResponse xmlns:ns2="http://v3.hotel.wsapi.ean.com/">
<customerSessionId>XXXXXX-XXXXXX-XXXXX-XXXXX-XXXXXX</customerSessionId>
<numberOfRoomsRequested>1</numberOfRoomsRequested>
<moreResultsAvailable>true</moreResultsAvailable>
<cacheKey>5byu3434:13434328d0ed:-22319</cacheKey>
<cacheLocation>1.1.1.1:7999</cacheLocation>
<cachedSupplierResponse supplierCacheTolerance="NOT_SUPPORTED" cachedTime="0" supplierRequestNum="1111" supplierResponseNum="11" supplierResponseTime="1111" candidatePreptime="45" otherOverheadTime="9" tpidUsed="6666" matchedCurrency="true" matchedLocale="true"/>
<HotelList size="20" activePropertyCount="1375">
<HotelSummary order="0" ubsScore="1024995">
<hotelId>3345698</hotelId>
<name>Park Plaza Westminster Bridge London</name>
<address1>200 Westminster Bridge Road</address1>
<city>London</city>
<postalCode>SE1 7UT</postalCode>
<countryCode>GB</countryCode>
<airportCode>LCY</airportCode>
<supplierType>E</supplierType>
<propertyCategory>1</propertyCategory>
<hotelRating>4.0</hotelRating>
<confidenceRating>45</confidenceRating>
<amenityMask>1442315</amenityMask>
<tripAdvisorRating>4.5</tripAdvisorRating>
<tripAdvisorReviewCount>11972</tripAdvisorReviewCount>
<tripAdvisorRatingUrl>...</tripAdvisorRatingUrl>
<locationDescription>Near London Aquarium</locationDescription>
<shortDescription>...</shortDescription>
<highRate>300.10</highRate>
<lowRate>200.02</lowRate>
<rateCurrencyCode>USD</rateCurrencyCode>
<latitude>51.50111</latitude>
<longitude>-0.11733</longitude>
<proximityDistance>0.7890795</proximityDistance>
<proximityUnit>MI</proximityUnit>
<hotelInDestination>true</hotelInDestination>
<thumbNailUrl>...</thumbNailUrl>
<deepLink>...</deepLink>
<RoomRateDetailsList>
<RoomRateDetails>
<roomTypeCode>200019300</roomTypeCode>
<rateCode>205428827</rateCode>
<maxRoomOccupancy>2</maxRoomOccupancy>
<quotedRoomOccupancy>1</quotedRoomOccupancy>
<minGuestAge>0</minGuestAge>
<roomDescription>Superior Room, 1 King Bed, Accessible</roomDescription>
<propertyAvailable>true</propertyAvailable>
<propertyRestricted>false</propertyRestricted>
<expediaPropertyId>3113039</expediaPropertyId>
<RateInfos size="1">
<RateInfo priceBreakdown="true" promo="true" rateChange="true">
<RoomGroup>
<Room>
<numberOfAdults>1</numberOfAdults>
<numberOfChildren>0</numberOfChildren>
<rateKey>59e77b78-044f-45e1-84c4-223f2d090518-5001</rateKey>
</Room>
</RoomGroup>
<ChargeableRateInfo averageBaseRate="257.48" averageRate="170.03" commissionableUsdTotal="1020.20" currencyCode="USD" maxNightlyRate="175.06" nightlyRateTotal="850.16" surchargeTotal="170.04" total="1020.20">
<NightlyRatesPerRoom size="5">
<NightlyRate baseRate="252.40" rate="166.68" promo="true"/>
<NightlyRate baseRate="265.09" rate="175.06" promo="true"/>
<NightlyRate baseRate="265.09" rate="175.06" promo="true"/>
<NightlyRate baseRate="252.40" rate="166.68" promo="true"/>
<NightlyRate baseRate="252.40" rate="166.68" promo="true"/>
</NightlyRatesPerRoom>
<Surcharges size="1">
<Surcharge type="TaxAndServiceFee" amount="170.04"/>
</Surcharges>
</ChargeableRateInfo>
<nonRefundable>true</nonRefundable>
<rateType>MerchantStandard</rateType>
<promoId>218622661</promoId>
<promoDescription>Save 30%</promoDescription>
<promoType>Standard</promoType>
<currentAllotment>6</currentAllotment>
</RateInfo>
</RateInfos>
<ValueAdds size="1">
<ValueAdd id="2048">
<description>Free Wireless Internet</description>
</ValueAdd>
</ValueAdds>
</RoomRateDetails>
</RoomRateDetailsList>
</HotelSummary>
<HotelSummary order="1" ubsScore="1020278">
......
类
@XmlRootElement(name = "HotelListResponse")
@XmlAccessorType(XmlAccessType.FIELD)
public class HotelListResponse {
@XmlElement(name = "customerSessionId")
private String customerSessionId;
@XmlElement(name = "numberOfRoomsRequested")
private short numberOfRoomsRequested;
@XmlElement(name = "moreResultsAvailable")
private boolean moreResultsAvailable;
@XmlElement(name = "cacheKey")
private String cacheKey;
@XmlElement(name = "cacheLocation")
private String cacheLocation;
@XmlElement(name = "HotelList")
private HotelList hotelList;
HotelList
@XmlRootElement(name = "HotelList")
@XmlAccessorType(XmlAccessType.FIELD)
public class HotelList {
@XmlAttribute(name = "size")
private int size;
@XmlAttribute(name = "activePropertyCount")
private int activePropertyCount;
@XmlElement(name = "HotelSummary")
private List<HotelSummary> hotelSummaries;
HotelSummary
@XmlRootElement(name = "HotelSummary")
@XmlAccessorType(XmlAccessType.FIELD)
public class HotelSummary {
@XmlAttribute(name = "order")
private int order;
@XmlAttribute(name = "ubsScore")
private long ubsScore;
@XmlElement(name = "hotelId")
private int hotelId;
@XmlElement(name = "name")
private String name;
@XmlElement(name = "address1")
private String address1;
@XmlElement(name = "city")
private String city;
@XmlElement(name = "postalCode")
private int postalCode;
@XmlElement(name = "countryCode")
private String countryCode;
@XmlElement(name = "airportCode")
private String airportCode;
@XmlElement(name = "supplierType")
private String supplierType;
@XmlElement(name = "propertyCategory")
private int propertyCategory;
@XmlElement(name = "hotelRating")
private float hotelRating;
@XmlElement(name = "confidenceRating")
private int confidenceRating;
@XmlElement(name = "amenityMask")
private int amenityMask;
@XmlElement(name = "tripAdvisorRating")
private double tripAdvisorRating;
@XmlElement(name = "tripAdvisorReviewRating")
private double tripAdvisorReviewRating;
@XmlElement(name = "tripAdvisorRatingUrl")
private String tripAdvisorRatingUrl;
@XmlElement(name = "locationDescription")
private String locationDescription;
@XmlElement(name = "shortDescription")
private String shortDescription;
@XmlElement(name = "highRate")
private double highRate;
@XmlElement(name = "lowRate")
private double lowRate;
@XmlElement(name = "rateCurrencyCode")
private String rateCurrencyCode;
@XmlElement(name = "latitude")
private double latitude;
@XmlElement(name = "longitude")
private double longitude;
@XmlElement(name = "proximityDistance")
private double proximityDistance;
@XmlElement(name = "proximityUnit")
private String proximityUnit;
@XmlElement(name = "hotelInDestination")
private boolean hotelInDestination;
@XmlElement(name = "thumbNailUrl")
private String thumbNailUrl;
@XmlElement(name = "deepLink")
private String deepLink;
@XmlElement(name = "RoomRateDetailsList")
private RoomRateDetailsList roomRateDetailsList;
RoomRateDetailsList
@XmlRootElement(name = "RoomRateDetailsList")
@XmlAccessorType(XmlAccessType.FIELD)
public class RoomRateDetailsList {
@XmlElement(name = "RoomRateDetails")
private RoomRateDetails roomRateDetails;
RoomRateDetails
@XmlRootElement(name = "RoomRateDetails")
@XmlAccessorType(XmlAccessType.FIELD)
public class RoomRateDetails {
@XmlElement(name = "roomTypeCode")
private int roomTypeCode;
@XmlElement(name = "rateCode")
private int rateCode;
@XmlElement(name = "maxRoomOccupancy")
private int maxRoomOccupancy;
@XmlElement(name = "quotedRoomOccupancy")
private int quotedRoomOccupancy;
@XmlElement(name = "minGuestAge")
private int minGuestAge;
@XmlElement(name = "roomDescription")
private String roomDescription;
@XmlElement(name = "propertyAvailable")
private boolean propertyAvailable;
@XmlElement(name = "propertyRestricted")
private boolean propertyRestricted;
@XmlElement(name = "expediaPropertyId")
private int expediaPropertyId;
@XmlElement(name="RateInfos")
private RateInfo rateInfos;
RoomRate
@XmlRootElement(name = "RateInfo")
@XmlAccessorType(XmlAccessType.FIELD)
public class RateInfo {
@XmlAttribute(name = "priceBreakdown")
private boolean priceBreakdown;
@XmlAttribute(name = "rateChange")
private boolean rateChange;
@XmlAttribute(name = "promo")
private boolean promo;
@XmlElement(name = "RoomGroup")
private RoomGroup roomGroup;
@XmlElement(name = "ChargeableRateInfo")
private ChargeableRateInfo chargeableRateInfo;
@XmlElement(name = "nonRefunable")
private boolean nonRefundable;
@XmlElement(name = "rateType")
private String rateType;
@XmlElement(name = "promoId")
private long promoId;
@XmlElement(name = "promoDescription")
private String promoDescription;
@XmlElement(name = "currentAllotment")
private int currentAllotment;
ChargeableRateInfo
@XmlRootElement(name = "ChargeableRateInfo")
@XmlAccessorType(XmlAccessType.FIELD)
public class ChargeableRateInfo {
@XmlAttribute(name = "averageBaseRate")
private double averageBaseRate;
@XmlAttribute(name = "averageRate")
private double averageRate;
@XmlAttribute(name = "commissionableUsdTotal")
private double commissionableUsdTotal;
@XmlAttribute(name = "currencyCode")
private String currencyCode;
@XmlAttribute(name = "maxNightlyRate")
private double maxNightlyRate;
@XmlAttribute(name = "nightlyRateTotal")
private double nightlyRateTotal;
@XmlAttribute(name = "surchargeTotal")
private double surchargeTotal;
@XmlAttribute(name = "total")
private double total;
@XmlElement(name = "NightlyRatesPerRoom")
private NightlyRatesPerRoom nightlyRatesPerRoom;
@XmlElement(name = "Surcharges")
private Surcharges surcharges;
附加费
@XmlRootElement(name = "Surcharges")
@XmlAccessorType(XmlAccessType.FIELD)
public class Surcharges {
@XmlAttribute(name = "size")
private int size;
@XmlElement(name = "Surcharge")
private List<Surcharge> surcharges;
附加费
@XmlRootElement(name = "Surcharge")
@XmlAccessorType(XmlAccessType.FIELD)
public class Surcharge {
@XmlAttribute(name = "type")
private String type;
@XmlAttribute(name = "amount")
private double amount;
代码
RestTemplate restTemplate = new RestTemplate();
HotelListResponse hotelResponse = restTemplate.getForObject(URL,
HotelListResponse.class);
System.err.println("get number of rooms requested>>>"
+ hotelResponse.getNumberOfRoomsRequested());
System.err.println(" Hotel Summariesssssssss Size>>>"
+ hotelResponse.getHotelList().getHotelSummaries().size());
for (HotelSummary hotel : hotelResponse.getHotelList()
.getHotelSummaries()) {
System.err.println("Hotel Name >>" + hotel.getName());
System.err.println("RoomRateDetails toString:"
+ hotel.getRoomRateDetailsList().getRoomRateDetails()
.getRateInfos().getChargeableRateInfo() != null);
System.err.println("to total:"
+ hotel.getRoomRateDetailsList().getRoomRateDetails()
.getRateInfos().getChargeableRateInfo().getTotal());
//error is ^^^^^^^^^^^^^ line 91
控制台
get number of rooms requested>>>1
Hotel Summariesssssssss Size>>>20
Hotel Name >>Radisson Blu Portman Hotel
true
Jun 19, 2016 2:29:48 PM org.apache.catalina.core.StandardWrapperValve invoke
SEVERE: Servlet.service() for servlet [pr] in context with path [/Project1]
threw exception [Request processing failed; nested exception is
java.lang.NullPointerException] with root cause java.lang.NullPointerException
at com.myproject.services.HotelsServiceImpl.eoa(HotelsServiceImpl.java:91)