Gson 为 fromJson 方法返回 null

Question

I am trying to parse my Tools class using Gson. The problem is that the toolConverted have empty ToolA & ToolB when I run my unit test. The string itself is a valid JSON string, I figured the problem may be with my constructors in the Tools.java class.

Tools.java

@Getter
@AllArgsConstructor
@NoArgsConstructor
public class Tools{
    @JsonProperty("ToolA")
    List<ToolA> toolA;

    @JsonProperty("ToolB")
    List<ToolB> toolB;
}

ToolA.java

@Getter
@AllArgsConstructor
public class ToolA{
    String uxA;
    String uxB;
    String uxC;
    String uxD;
}

Conversion

Gson gson = new Gson();
JsonMapper jsonMapper = JsonMapper.builder().build();
String toolsValue= jsonMapper.writeValueAsString(TOOLS_MAP);
Tools toolConverted = gson.fromJson(toolsValue, Tools .class);

toolsValue

{
   "ToolA":[
      {
         "uxA":"7",
         "uxB":"234.53",
         "uxC":"5345.23",
         "uxD":"0.155"
      }
   ],
   "ToolB":[
      {
         "state":"AZ",
         "compound_tax":"N",
         "federal_tax_percent":"5.0000",
         "provincial_tax_percent":"0.0000"
      }
   ]
}

Answer 1

try @SerializedName("ToolA") instead of @JsonProperty("ToolA") , last one is a jackson annotation