java - org.codehaus.jackson.JsonParseException : Unexpected character ('' (code 65279/0xfeff)): expected a valid value

Question

我遇到了一个奇怪的问题，我是 Android 和 Json 的新手。我正在使用一个显示 json 响应的 RESTful WCF，如下所示:

{"StatusCode":200,"Message":"","Result":{"Agencies":[],"Areas":[{"id":11,"area_name":"area 10","description":"updated 10","active":true},{"id":12,"area_name":"Area 11","description":"temp 11","active":true},{"id":13,"area_name":"Area 12","description":"temp12","active":true},{"id":14,"area_name":"area 13","description":"temp 13 3","active":true},{"id":7,"area_name":"Area 6","description":"temp6","active":true},{"id":8,"area_name":"area 7","description":"temp7","active":true},{"id":9,"area_name":"area 8","description":"temp 8","active":true},{"id":10,"area_name":"area 9","description":"temp 9","active":true},{"id":1,"area_name":"area1","description":"temp","active":true},{"id":3,"area_name":"area2","description":"temp2","active":true},{"id":4,"area_name":"area3","description":"asdddasdsa","active":true},{"id":5,"area_name":"area4","description":"dasdassad","active":true},{"id":6,"area_name":"area5","description":"temp5","active":true}],"Districts":[{"id":5,"district_name":"District 5","district_code":"1","description":"temp 5","area_id":8,"area_name":"area 7","active":true},{"id":4,"district_name":"district 4","district_code":"2","description":"temp 4","area_id":8,"area_name":"area 7","active":true},{"id":1,"district_name":"district 1","district_code":"1","description":"descrp","area_id":10,"area_name":"area 9","active":true},{"id":2,"district_name":"district 2","district_code":"1","description":"descrp","area_id":10,"area_name":"area 9","active":true},{"id":3,"district_name":"district 3","district_code":"1","description":"temp 3","area_id":5,"area_name":"area4","active":true}],"FacilityOccupacies":[{"id":1,"facility_name":"C","description":"Computer facility","active":true},{"id":2,"facility_name":"CA","description":"Adult correctional facility","active":true},{"id":3,"facility_name":"CJ","description":"Juvenile correctional facility","active":true},{"id":4,"facility_name":"GS","description":"Garage for operations support, including vehicle maintenance, repair or fuel depot","active":true},{"id":5,"facility_name":"GP","description":"Garage for parking","active":true},{"id":6,"facility_name":"I","description":"Light industrial facility","active":true},{"id":7,"facility_name":"L","description":"Library","active":true},{"id":8,"facility_name":"M","description":"Medical facilities such as clinics, infirmaries or hospitals","active":true},{"id":9,"facility_name":"N","description":"Non-categorized facility","active":true},{"id":10,"facility_name":"OM","description":"Office buildings where approximately 75% or more of occupants are senior level managers","active":true},{"id":11,"facility_name":"OS","description":"Office building","active":true},{"id":12,"facility_name":"SP","description":"Primary school","active":true},{"id":13,"facility_name":"SS","description":"Secondary school","active":true},{"id":14,"facility_name":"U","description":"University","active":true},{"id":15,"facility_name":"W","description":"Warehouse","active":true}],"FireSprinkler":[{"id":2,"fire_sprinkler":"N","description":"A lack of a fire sprinkler fire suppression system.","active":true},{"id":3,"fire_sprinkler":"P","description":"A partial fire sprinkler fire suppression system.","active":true},{"id":1,"fire_sprinkler":"Y","description":"A full fire sprinkler fire suppression system.","active":true}],"FoundSources":[{"id":1,"found_source_name":"COP","description":"Certificates of Participation","active":true},{"id":2,"found_source_name":"COSF","description":"Capital Outlay Stabilization Fund","active":true},{"id":6,"found_source_name":"Exempt","description":"Exempt From Rent","active":true},{"id":4,"found_source_name":"GF","description":"Capital Outlay Stabilization Fund","active":true},{"id":5,"found_source_name":"N/A","description":"Not Applicable","active":true},{"id":3,"found_source_name":"PLTO","description":"Private Lease-To-Own","active":true}],"Locations":[{"id":1,"location_name":"location 1","location_code":"1","description":"temp 1","district_id":3,"district_name":"district 3","active":true}],"MarshallSwift":[{"id":1,"class":"A","frame":"Structural steel columns and beams fire proofed with masonry, concrete, plaster, or other incombustible material.","floor":"Concrete or concrete covered steel deck, fire-proofed.","roof":"Concrete or concrete covered steel deck,fire-proofed.","walls":"Non-bearing curtain walls, masonry, concrete, metal, and glass panels, stone.","active":true},{"id":2,"class":"B","frame":"Reinforced concrete columns and beams.","floor":"Concrete or concrete covered steel deck, fire-proofed.","roof":"Concrete or concrete covered steel deck, fire-proofed.","walls":"Non-bearing curtain walls, masonry, concrete, metal, and glass panels, stone.","active":true},{"id":3,"class":"C","frame":"Structural steel columns and beams fire-proofed with masonry, concrete, plaster, or other incombustible material.","floor":"Concrete or concrete covered steel deck, fire-proofed.","roof":"Wood or steel joist, wood or steel deck.","walls":"Brick, concrete block, or tile masonry, tilt-up formed concrete.","active":true},{"id":4,"class":"D","frame":"Wood or steel studs in bearing wall, wood or steel skeleton frame.","floor":"Wood or steel floor joists or slabs on ground.","roof":"Wood or steel joist, wood or steel deck.","walls":"Almost any material except masonry or concrete. May have masonry veneer over steel or wood framing.","active":true},{"id":5,"class":"S","frame":"Steel – No fire protection.","floor":"Concrete","roof":"Steel – No fire protection.","walls":"Steel – No fire protection.","active":true}],"Profiles":[{"id":1,"profile_name":"Administrator","description":"System Administrator","active":true},{"id":2,"profile_name":"Inspector","description":"Building Inspector","active":true}],"ProjectCategories":[{"id":1,"category_name":"Fire/Life Safety","description":"Fire/Life Safety","active":true},{"id":2,"category_name":"HVAC","description":"HVAC","active":true},{"id":3,"category_name":"Infrastructure","description":"Infrastructure","active":true},{"id":4,"category_name":"Interior Renovation","description":"Interior Renovation","active":true},{"id":5,"category_name":"Shell","description":"Shell","active":true},{"id":6,"category_name":"Energy Consv","description":"Energy Consv","active":true},{"id":7,"category_name":"ADA Access","description":"ADA Access","active":true},{"id":8,"category_name":"Building Services","description":"Building Services","active":true},{"id":9,"category_name":"NONE","description":"NONE","active":true}],"Projects":[],"Structures":[]}}

我正在尝试使用 Jackson 1.9.11 将其反序列化为复杂对象。

所以我用

 final ObjectMapper mapper = new ObjectMapper();
 RawResult<RawCatalogs> oResult = mapper.readValue(strResponse, new TypeReference<RawResult<RawCatalogs>>() {});

其中 RawResult 是一个带有模板的类，而 RawCatalogs 是一个带有嵌套对象的类，它曾经正确地反序列化响应，但现在它在标题中显示错误。

类的定义是这样的(不知道是否需要嵌套类的信息来全面支持？我想我已经很好地映射了它们，只是为了清楚起见而发布重要信息)

import org.codehaus.jackson.annotate.JsonCreator;
import org.codehaus.jackson.annotate.JsonIgnore;
import org.codehaus.jackson.annotate.JsonProperty;


final public class RawResult<T> {

    private final Integer _StatusCode;

    private final Boolean _Status;

    private final String _Message;  

    private final T _Result;

    public RawResult(Class<T> oClass) throws InstantiationException, IllegalAccessException
    {
        _StatusCode = null;
        _Message = null;
        _Result = BuildGeneric(oClass);
        _Status = false;

    }   

    @JsonCreator
    public RawResult(
            @JsonProperty("StatusCode") Integer StatusCode, 
            @JsonProperty("Message") String Message, 
            @JsonProperty("Result")  T Result)
    {
        _StatusCode = StatusCode;
        _Message = Message;
        _Result = Result;
        _Status = StatusCode == 200;
    }

     private T BuildGeneric(Class<T> oClass) throws InstantiationException,
     IllegalAccessException
     {
         return oClass.newInstance();
     }

    /**
     * @return the _StatusCode
     */
     @JsonProperty("StatusCode")
    public Integer get_StatusCode() {
        return _StatusCode;
    }

    /**
     * @return the _Message
     */
     @JsonProperty("Message")
    public String get_Message() {
        return _Message;
    }

    /**
     * @return the _Result
     */
     @JsonProperty("Result")
    public T get_Result() {
        return _Result;
    }

    /**
     * @return the _Status
     */
     @JsonIgnore
    public Boolean get_Status() {
        return _Status;
    }

}

---

public interface ICatalog {

    String _Id = null;  
    String _Description = null;
    boolean _Active = false;

    /**
     * @return the _Id
     */
    public String get_Id();

    /**
     * @return the _Description
     */
    public String get_Description() ;


    /**
     * @return the _Active
     */
    public boolean is_Active() ;
}

---

public abstract class RawCatalog implements ICatalog {


    protected final String _Id; 
    protected final String _Description;
    protected final String _Name;
    protected final boolean _Active;


    public RawCatalog(String Id, String Description,String Name, boolean Active)
    {
        _Id = Id;
        _Description = Description;
        _Name = Name;
        _Active = Active;

    }

    @JsonProperty("id")
    public String get_Id() {
        // TODO Auto-generated method stub
        return _Id;
    }

    @JsonProperty("description")
    public String get_Description() {
        // TODO Auto-generated method stub
        return _Description;
    }

    @JsonProperty("name")
    public String get_Name() {
        // TODO Auto-generated method stub
        return _Name;
    }

    @JsonProperty("active")
    public boolean is_Active() {
        // TODO Auto-generated method stub
        return _Active;
    }

}

---

public final class RawAgency extends RawCatalog {

    private final String _AgencyCode;
    private final String _LocationId;
    private final String _LocationName;
    private final int _NumberOfStructures;

    @JsonCreator
    public RawAgency(
            @JsonProperty("id") String Id,
            @JsonProperty("description") String Description,
            @JsonProperty("agency_name") String Name, 
            @JsonProperty("active") Boolean Active,         
            @JsonProperty("agency_code") String AgencyCode, 
            @JsonProperty("get_LocationId")  String LocationId,
            @JsonProperty("get_LocationName")  String LocationName,
            @JsonProperty("get_NumberOfStructures")  int NumberOfStructures
            )
    {
        super(Id, Description, Name,Active);        
        _AgencyCode = AgencyCode;
        _LocationId = LocationId;
        _LocationName = LocationName;
        _NumberOfStructures = NumberOfStructures;
    }

    /**
     * @return the _AgencyName
     */
    @JsonProperty("agency_name")
    @Override
    public String get_Name() {
        return super.get_Name();
    }

    /**
     * @return the _AgencyCode
     */
    @JsonProperty("agency_code")
    public String get_AgencyCode() {
        return _AgencyCode;
    }

    /**
     * @return the _LocationId
     */
    @JsonProperty("location_id")
    public String get_LocationId() {
        return _LocationId;
    }

    /**
     * @return the _NumberOfStructures
     */
    @JsonProperty("number_of_structures")
    public int get_NumberOfStructures() {
        return _NumberOfStructures;
    }

    /**
     * @return the _LocationName
     */
    @JsonProperty("location_name")
    public String get_LocationName() {
        return _LocationName;
    }

}

---

import java.util.List;

import org.codehaus.jackson.annotate.JsonCreator;
import org.codehaus.jackson.annotate.JsonProperty;


final public class RawCatalogs {


    private final List<RawAgency> _Agencies;

    private final List<RawArea> _Areas;

    private final List<RawDistrict> _Districts;

    private final List<RawFacilityOccupacy> _FacilityOccupacies;

    private final List<RawFireSprinkler> _FireSprinklers;

    private final List<RawFoundSources> _FoundSources;

    private final List<RawLocation> _Locations;

    private final List<RawMarshallSwift> _MarshallSwifts;

    private final List<RawProfile> _Profiles;

    private final List<RawProjectCategory> _ProjectCategories;

    private final List<RawProject> _Projects;

    private final List<RawStructure> _Structures;

    @JsonCreator
    public RawCatalogs( 
            @JsonProperty("Agencies") List<RawAgency> Agencies, 
            @JsonProperty("Areas") List<RawArea> Areas, 
            @JsonProperty("Districts") List<RawDistrict> Districts,
            @JsonProperty("FacilityOccupacies") List<RawFacilityOccupacy> FacilityOccupacies, 
            @JsonProperty("FireSprinkler") List<RawFireSprinkler> FireSprinklers,
            @JsonProperty("FoundSources")   List<RawFoundSources> FoundSources, 
            @JsonProperty("Locations") List<RawLocation> Locations, 
            @JsonProperty("MarshallSwift") List<RawMarshallSwift> MarshallSwifts,
            @JsonProperty("Profiles") List<RawProfile> Profiles, 
            @JsonProperty("ProjectCategories") List<RawProjectCategory> ProjectCategories, 
            @JsonProperty("Projects") List<RawProject> Projects,
            @JsonProperty("Structures") List<RawStructure> Structures
            )
    {
        _Agencies = Agencies;
        _Areas = Areas;
        _Districts = Districts;
        _FacilityOccupacies = FacilityOccupacies;
        _FireSprinklers = FireSprinklers;
        _FoundSources = FoundSources;
        _Locations = Locations;
        _MarshallSwifts = MarshallSwifts;
        _Profiles = Profiles;
        _ProjectCategories = ProjectCategories;
        _Projects = Projects;
        _Structures = Structures;
    }

    /**
     * @return the _Agencies
     */
    @JsonProperty("Agencies")
    public List<RawAgency> get_Agencies() {
        return _Agencies;
    }

    /**
     * @return the _Areas
     */
    @JsonProperty("Areas")
    public List<RawArea> get_Areas() {
        return _Areas;
    }

    @JsonProperty("Districts")
    /**
     * @return the _Districts
     */
    public List<RawDistrict> get_Districts() {
        return _Districts;
    }

    /**
     * @return the _FacilityOccupacies
     */
    @JsonProperty("FacilityOccupacies")
    public List<RawFacilityOccupacy> get_FacilityOccupacies() {
        return _FacilityOccupacies;
    }

    /**
     * @return the _FireSprinklers
     */
    @JsonProperty("FireSprinkler")
    public List<RawFireSprinkler> get_FireSprinklers() {
        return _FireSprinklers;
    }

    /**
     * @return the _FoundSources
     */
    @JsonProperty("FoundSources")
    public List<RawFoundSources> get_FoundSources() {
        return _FoundSources;
    }

    /**
     * @return the _Locations
     */
    @JsonProperty("Locations")
    public List<RawLocation> get_Locations() {
        return _Locations;
    }

    /**
     * @return the _MarshallSwifts
     */
    @JsonProperty("MarshallSwift")
    public List<RawMarshallSwift> get_MarshallSwifts() {
        return _MarshallSwifts;
    }

    /**
     * @return the _Profiles
     */
    @JsonProperty("ProjectCategories")
    public List<RawProfile> get_Profiles() {
        return _Profiles;
    }

    /**
     * @return the _ProjectCategories
     */
    @JsonProperty("Profiles")
    public List<RawProjectCategory> get_ProjectCategories() {
        return _ProjectCategories;
    }

    /**
     * @return the _Projects
     */
    @JsonProperty("Projects")
    public List<RawProject> get_Projects() {
        return _Projects;
    }

    /**
     * @return the _Structures
     */
    @JsonProperty("Structures")
    public List<RawStructure> get_Structures() {
        return _Structures;
    }
}

所以我的问题是为什么显示该错误？我在 stackoverflow 上搜索了类似的问题，所有问题似乎都与编码错误有关，但不是相同的代码错误，而且我无法控制 WCF。

实际上，如果我将 Json Respone 复制粘贴到 this page 中，它看起来格式正确。

我也尝试使用 mapper.configure，但 Jsonparser 的所有功能都不起作用

我做错了什么？

Answer 1

我在读取 JSON 文件时遇到了同样的错误。

您要么确保从 RESTful WCF 获得没有初始 0xfeff 的响应，要么在将其发送到 JSON 解析器之前将其剥离。也许 trim() 可以解决问题......