使用Retrofit和Gson解析JSON数组响应

Z时代
2024-01-10
分类：问答

这是我对Web服务的JSONArray响应：

[ { "sponsors": [ { "leg_id": "NYL000067", "type": "primary", "name": "AUBRY" }, { "leg_id": "NYL000171", "type": "cosponsor", "name": "PERRY" }, { "leg_id": "NYL000066", "type": "cosponsor", "name": "ARROYO" }, { "leg_id": "NYL000223", "type": "cosponsor", "name": "BARRETT" }, { "leg_id": "NYL000312", "type": "cosponsor", "name": "STECK" }, { "leg_id": "NYL000180", "type": "cosponsor", "name": "RIVERA" }, { "leg_id": "NYL000114", "type": "cosponsor", "name": "GOTTFRIED" }, { "leg_id": "NYL000091", "type": "cosponsor", "name": "COOK" }, { "leg_id": "NYL000126", "type": "cosponsor", "name": "JAFFEE" }, { "leg_id": "NYL000327", "type": "cosponsor", "name": "DAVILA" }, { "leg_id": "NYL000144", "type": "cosponsor", "name": "LUPARDO" }, { "leg_id": null, "type": "cosponsor", "name": "SEPULVEDA", "committee_id": null }, { "leg_id": "NYL000290", "type": "cosponsor", "name": "MOSLEY" }, { "leg_id": "NYL000167", "type": "cosponsor", "name": "ORTIZ" }, { "leg_id": "NYL000170", "type": "cosponsor", "name": "PEOPLES-STOKES" }, { "leg_id": "NYL000221", "type": "cosponsor", "name": "SKARTADOS" }, { "leg_id": "NYL000216", "type": "cosponsor", "name": "QUART" }, { "leg_id": "NYL000208", "type": "cosponsor", "name": "WEPRIN" }, { "leg_id": "NYL000186", "type": "cosponsor", "name": "ROSENTHAL" }, { "leg_id": "NYL000139", "type": "cosponsor", "name": "LIFTON" }, { "leg_id": "NYL000064", "type": "cosponsor", "name": "ABINANTI" }, { "leg_id": "NYL000173", "type": "cosponsor", "name": "PRETLOW" }, { "leg_id": "NYL000339", "type": "cosponsor", "name": "BICHOTTE" }, { "leg_id": null, "type": "cosponsor", "name": "BARRON", "committee_id": null }, { "leg_id": "NYL000341", "type": "cosponsor", "name": "WALKER" }, { "leg_id": "NYL000355", "type": "cosponsor", "name": "BLAKE" }, { "leg_id": "NYL000185", "type": "cosponsor", "name": "RODRIGUEZ" }, { "leg_id": "NYL000259", "type": "cosponsor", "name": "FAHY" }, { "leg_id": "NYL000203", "type": "cosponsor", "name": "TITONE" }, { "leg_id": "NYL000286", "type": "cosponsor", "name": "MCDONALD" }, { "leg_id": "NYL000081", "type": "cosponsor", "name": "CAHILL" }, { "leg_id": "NYL000421", "type": "cosponsor", "name": "HARRIS" }, { "leg_id": "NYL000338", "type": "cosponsor", "name": "JOYNER" }, { "leg_id": "NYL000448", "type": "cosponsor", "name": "JENNE" }, { "leg_id": "NYL000070", "type": "cosponsor", "name": "BENEDETTO" }, { "leg_id": "NYL000310", "type": "cosponsor", "name": "SOLAGES" }, { "leg_id": "NYL000357", "type": "cosponsor", "name": "RICHARDSON" }, { "leg_id": "NYL000324", "type": "cosponsor", "name": "PICHARDO" }, { "leg_id": "NYL000423", "type": "cosponsor", "name": "HYNDMAN" }, { "leg_id": "NYL000313", "type": "cosponsor", "name": "STIRPE" }, { "leg_id": "NYL000131", "type": "cosponsor", "name": "KAVANAGH" }, { "leg_id": "NYL000204", "type": "cosponsor", "name": "TITUS" }, { "leg_id": "NYL000275", "type": "cosponsor", "name": "KIM" }, { "leg_id": "NYL000195", "type": "cosponsor", "name": "SIMOTAS" }, { "leg_id": "NYL000293", "type": "cosponsor", "name": "OTIS" }, { "leg_id": "NYL000220", "type": "cosponsor", "name": "MAYER" }, { "leg_id": "NYL000344", "type": "cosponsor", "name": "JEAN-PIERRE" } ], "id": "NYB00099404" }, { "sponsors": [ { "leg_id": "NJL000113", "type": "primary", "name": "Vainieri Huttle, Valerie" } ], "id": "NJB00038817" }, { "sponsors": [ { "leg_id": "NYL000208", "type": "primary", "name": "WEPRIN" } ], "id": "NYB00066288" }, { "sponsors": [ { "leg_id": "NJL000083", "type": "primary", "name": "Jasey, Mila M." }, { "leg_id": "NJL000086", "type": "primary", "name": "Caputo, Ralph R." }, { "leg_id": "NJL000046", "type": "primary", "name": "Watson Coleman, Bonnie" }, { "leg_id": "NJL000177", "type": "primary", "name": "Pintor Marin, Eliana" }, { "leg_id": "NJL000164", "type": "primary", "name": "Sumter, Shavonda E." }, { "leg_id": "NJL000104", "type": "primary", "name": "Oliver, Sheila Y." }, { "leg_id": "NJL000095", "type": "primary", "name": "Mainor, Charles" }, { "leg_id": "NJL000165", "type": "primary", "name": "Wimberly, Benjie E." }, { "leg_id": "NJL000016", "type": "cosponsor", "name": "Fuentes, Angel" }, { "leg_id": "NJL000085", "type": "cosponsor", "name": "Tucker, Cleopatra G." }, { "leg_id": "NJL000067", "type": "cosponsor", "name": "Stender, Linda" }, { "leg_id": "NJL000114", "type": "cosponsor", "name": "Johnson, Gordon M." }, { "leg_id": "NJL000082", "type": "cosponsor", "name": "McKeon, John F." }, { "leg_id": "NJL000129", "type": "cosponsor", "name": "Singleton, Troy" } ], "id": "NJB00030216" }, { "sponsors": [ { "leg_id": "NYL000088", "official_type": "SPONSOR", "type": "primary", "name": "Clark" }, { "leg_id": "NYL000171", "official_type": "COSPNSR", "type": "cosponsor", "name": "Perry" } ], "id": "NYB00035573" }, { "sponsors": [ { "leg_id": "NJL000111", "type": "primary", "name": "Schaer, Gary S." }, { "leg_id": "NJL000018", "type": "primary", "name": "Lampitt, Pamela R." }, { "leg_id": "NJL000105", "type": "primary", "name": "Giblin, Thomas P." }, { "leg_id": "NJL000171", "type": "primary", "name": "Mosquera, Gabriela M." }, { "leg_id": "NJL000011", "type": "cosponsor", "name": "Moriarty, Paul D." }, { "leg_id": "NJL000165", "type": "cosponsor", "name": "Wimberly, Benjie E." }, { "leg_id": "NJL000010", "type": "cosponsor", "name": "Madden, Fred H." }, { "leg_id": "NJL000007", "type": "cosponsor", "name": "Sweeney, Stephen M." }, { "leg_id": "NJL000039", "type": "cosponsor", "name": "Thompson, Samuel D." }, { "leg_id": "NJL000112", "type": "cosponsor", "name": "Weinberg, Loretta" }, { "leg_id": "NJL000087", "type": "cosponsor", "name": "Ruiz, M. Teresa" } ], "id": "NJB00021785" }, { "sponsors": [ { "leg_id": "NYL000138", "official_type": "SPONSOR", "type": "primary", "name": "Lentol" } ], "id": "NYB00010409" }, { "sponsors": [ { "leg_id": "NJL000028", "type": "primary", "name": "Gove, DiAnne C." }, { "leg_id": "NJL000027", "type": "primary", "name": "Rumpf, Brian E." }, { "leg_id": "NJL000099", "type": "cosponsor", "name": "Prieto, Vincent" } ], "id": "NJB00002928" }, { "sponsors": [ { "leg_id": "NJL000094", "type": "primary", "name": "Chiappone, Anthony" }, { "leg_id": "NJL000034", "type": "cosponsor", "name": "Angelini, Mary Pat" } ], "id": "NJB00010952" } ]

这是ApiInterface.java

    public interface ApiInterface {
    @GET("bills/")
    Call<SponsorsResult> getListOfSponsors(@Query("bill_id") String billId , @Query("session") String session, @Query("fields") String field);
}

这是方法和响应的调用：

 ApiInterface apiService = ApiClient.getClient().create(ApiInterface.class);
                Call<SponsorsResult> call = apiService.getListOfSponsors(AppConstants.ASSEMBLY_BILL_ID,AppConstants.SESSION,AppConstants.FIELD);
                call.enqueue(new Callback<SponsorsResult>() {
                    @Override
                    public void onResponse(Call<SponsorsResult> call, Response<SponsorsResult> response) {
                        Log.d(TAG,"Number :"+response.raw());
                        List<Sponsor> sponsors = response.body().getSponsors();
                        Log.d(TAG,"Number of sponsors :"+ sponsors.size());
                    }
                    @Override
                    public void onFailure(Call<SponsorsResult> call, Throwable t) {
                        t.printStackTrace();
                    }
                });

到目前为止，它失败了，这里是logcat输出：

com.google.gson.JsonSyntaxException: java.lang.IllegalStateException: Expected BEGIN_OBJECT but was BEGIN_ARRAY at line 1 column 2 path $

它无法执行响应。指导我分析此响应。

回答：

请尝试使用这个

    @FormUrlEncoded
    @POST("api/sponsors")
    Call<List<SponsorsResult>> getStatesAndDistrict(
            @Field("xyz") String field1
    );
   Call <List<SponsorsResult>> call = service.getSponsorsValue();
    call.enqueue(new Callback<List<SponsorsResult>>() {
        @Override
        public void onResponse(Call<List<SponsorsResult>> call, Response<List<SponsorsResult>> response) {
            List<SponsorsResult> rs = response.body();
        }
        @Override
        public void onFailure(Call<List<SponsorsResult>> call, Throwable t) {
        }
    });
 class SponsorsResult {
    @SerializedName("sponsors")
    private List<SponsorsValue> sponsors;
    public List<SponsorsValue> getSponsors() {
        return sponsors;
    }
}
class SponsorsValue{
    @SerializedName("leg_id")
    @Expose
    private String legId;
    @SerializedName("type")
    @Expose
    private String type;
    @SerializedName("name")
    @Expose
    private String name;
    public String getLegId() {
        return legId;
    }
    public void setLegId(String legId) {
        this.legId = legId;
    }
    public String getType() {
        return type;
    }
    public void setType(String type) {
        this.type = type;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
}