将对象转换为JSON控制字段名称大写首字母

Question

Object:

@XmlRootElement
public class AccountSyncResponse 
{
        private String Result;
        private String Value;

        public AccountSyncResponse() {}            

        public String getResult() {return Result;}
        public void setResult(String Result) {this.Result = Result;}
        public String getValue() {return Value;}
        public void setValue(String Value) {this.Value = Value;}        
}

Rest Web Service:

    @POST
    @Consumes(MediaType.APPLICATION_JSON)
    @Produces(MediaType.APPLICATION_JSON)
    public AccountSyncResponse excute(AccountSyncRequest ASReq) 
    {        
       AccountSyncResponse ASRes = new AccountSyncResponse();
       return ASRes;    
    }

The result is {"result":"Create","value":"123456"}

I need it the first letter of fields name to be in upper case {"Result":"Create","Value":"123456"}

How can I control fields name in the resulting json string ?

Answer 1

You can use @XmlElement as show below:

@XmlRootElement
@XmlAccessorType(XmlAccessType.FIELD)
public class AccountSyncResponse  {

    @XmlElement(name = "Result")
    private String result;

    @XmlElement(name = "Value")
    private String value;

    // Default constructor, getters and setters
}

Alternatively you can annotate the getters with @XmlElement (then the @XmlAccessorType annotation is not required).

---

Alternatively to JAXB annotation, you might want to consider Jackson. It's a popular JSON parser for Java that can be used with Jersey . Then you can use @JsonProperty instead (however Jackson can also work with JAXB annotations).

With Jackson, depending on your needs, you can use a PropertyNamingStrategy such as PropertyNamingStrategy.UpperCamelCaseStrategy .