Mapping JSON String zu einem POJO mit Jackson gibt Nullwerte

Question

Ich versuche, einige Werte unter "Eigenschaften" der folgenden JSON-Zeichenfolge zu einem POJO zu lesen. Aber alles, was ich bekomme, sind Nullwerte.

{ 
    "type": "Feature", 
    "geometry": { 
    "type": "Point", 
    "coordinates": [ 
     144.9798, 
     -37.743 
    ] 
    }, 
    "properties": { 
    "PFI": "51351644", 
    "EZI_ADD": "581 BELL STREET COBURG 3058", 
    "ROAD_NAME": "BELL", 
    "ROAD_TYPE": "STREET", 
    "LOCALITY": "COBURG", 
    "LGA_CODE": "316", 
    "STATE": "VIC", 
    "POSTCODE": "3058", 
    "ADD_CLASS": "S" 
    }, 
    "id": "ADDRESS.581" 
} 

Meine POJO Klasse

@JsonIgnoreProperties(ignoreUnknown = true) 
class Property { 

    public Property(){} 

    private String EZI_ADD; // e.g., "14 FAIRWAY COURT BUNDOORA 3083" 
    private String STATE; // e.g., "VIC" 
    private String POSTCODE; // e.g., "3083" 
    private String LGA_CODE; // e.g., 373 
    private String LOCALITY; // e.g., "BUNDOORA" 
    private String ADD_CLASS; // e.g., "S", or "M" 
    private String SA1_7DIG11 = ""; // SA1 code e.g., "2120241" 

    public String getEZI_ADD() { 
     return EZI_ADD; 
    } 

    @JsonProperty("EZI_ADD") 
    public void setEZI_ADD(String eZI_ADD) { 
     EZI_ADD = eZI_ADD; 
    } 

    public String getSTATE() { 
     return STATE; 
    } 

    @JsonProperty("STATE") 
    public void setSTATE(String sTATE) { 
     STATE = sTATE; 
    } 

    public String getPOSTCODE() { 
     return POSTCODE; 
    } 

    @JsonProperty("POSTCODE") 
    public void setPOSTCODE(String pOSTCODE) { 
     POSTCODE = pOSTCODE; 
    } 

    public String getLGA_CODE() { 
     return LGA_CODE; 
    } 

    @JsonProperty("LGA_CODE") 
    public void setLGA_CODE(String lGA_CODE) { 
     LGA_CODE = lGA_CODE; 
    } 

    public String getLOCALITY() { 
     return LOCALITY; 
    } 

    @JsonProperty("LOCALITY") 
    public void setLOCALITY(String lOCALITY) { 
     LOCALITY = lOCALITY; 
    } 

    public String getADD_CLASS() { 
     return ADD_CLASS; 
    } 

    @JsonProperty("ADD_CLASS") 
    public void setADD_CLASS(String aDD_CLASS) { 
     ADD_CLASS = aDD_CLASS; 
    } 

    public String getSA1_7DIG11() { 
     return SA1_7DIG11; 
    } 

    @JsonProperty("SA1_7DIG11") 
    public void setSA1_7DIG11(String sA1_7DIG11) { 
     SA1_7DIG11 = sA1_7DIG11; 
    } 
} 

Code-Umwandlung ist als

//Above json string 
String jsonString = "{\"type\":\"Feature\",\"geometry\":{\"type\":\"Point\",\"coordinates\":[144.9798,-37.743]},\"properties\":{\"PFI\":\"51351644\",\"EZI_ADD\":\"581 BELL STREET COBURG 3058\",\"ROAD_NAME\":\"BELL\",\"ROAD_TYPE\":\"STREET\",\"LOCALITY\":\"COBURG\",\"LGA_CODE\":\"316\",\"STATE\":\"VIC\",\"POSTCODE\":\"3058\",\"ADD_CLASS\":\"S\"},\"id\":\"ADDRESS.581\"}"; 
ObjectMapper mapper = new ObjectMapper(); 
Property properties = mapper.readValue(jsonString, Property.class); 

folgt

Ausgang:

{ 
    "properties": { 
    "EZI_ADD": null, 
    "STATE": null, 
    "POSTCODE": null, 
    "LGA_CODE": null, 
    "LOCALITY": null, 
    "ADD_CLASS": null, 
    "SA1_7DIG11": "" 
    } 
} 

Answer 1

Die JSON String Sie senden die Property nicht überein Klasse. Fügen Sie eine Wrapper-Klasse, z. so etwas wie diese:

public class Feature { 

    private String type; 
    private String id; 
    private Property property; 

    // getters and setters 
} 

Dann können Sie die Anfrage und den JSON String senden wird Ihr Objekt analysiert werden:

{ 
    "type": "feature", 
    "id": "test", 
    "property": { 
    "PFI": "51351644", 
    "EZI_ADD": "581 BELL STREET COBURG 3058", 
    "ROAD_NAME": "BELL", 
    "ROAD_TYPE": "STREET", 
    "LOCALITY": "COBURG", 
    "LGA_CODE": "316", 
    "STATE": "VIC", 
    "POSTCODE": "3058", 
    "ADD_CLASS": "S" 
    } 
}