使用Flexjson更改属性名称 [英] Change property name with Flexjson

问题描述

我使用FlexJson进行序列化，唯一的问题是它会生成小写的字段名，而我需要它们以大写开头:

I use FlexJson for serialization, the only problem is that it generates the field names lower case while I need them to start with upper case:

class Person
{
     String name;
     public String getName() { return name;}
}

序列化时，该字段序列化为name，而我需要将其序列化为Name.

When serialized the field is serialized as name, while I need it to be Name.

如何指定输出字段名称?我可以使用一些属性来指定所需的序列化名称吗?

How can I specify the output field name? Is there some attribute I can put to specify the required serialization name?

推荐答案

您可以使用自定义变压器来实现.根据Flexjson页面转换器，是:

You can achieve this by using a Custom Transformer. As per Flexjson page transformer is:

负责决定如何将传入的对象转换为 JSON，对JSONContext对象进行适当的调用以输出 JSON，和/或在转换过程中传递对象.

Responsible for deciding how to translate the passed in object to JSON, making the appropriate calls on the JSONContext object to output the JSON, and/or passing the object along the transformation process.

Flexjson为此提供了一个抽象类 AbstractTransformer ；扩展和覆盖transform(Object object)可以自己处理转换.

Flexjson has provided an abstract class AbstractTransformer for this purpose; Extend and override transform(Object object) to handle the transformation by yourself.

下面粘贴的是FieldNameTransformer的代码，该代码是我编写的用于手动指定字段名称s的代码:

Pasted below is the code of FieldNameTransformer which I wrote for specifying the field name s manually:

public class FieldNameTransformer extends AbstractTransformer {
    private String transformedFieldName;

    public FieldNameTransformer(String transformedFieldName) {
        this.transformedFieldName = transformedFieldName;
    }

    public void transform(Object object) {
        boolean setContext = false;

        TypeContext typeContext = getContext().peekTypeContext();

        //Write comma before starting to write field name if this
        //isn't first property that is being transformed
        if (!typeContext.isFirst())
            getContext().writeComma();

        typeContext.setFirst(false);

        getContext().writeName(getTransformedFieldName());
        getContext().writeQuoted(object.toString());

        if (setContext) {
            getContext().writeCloseObject();
        }
    }

    /***
     * TRUE tells the JSONContext that this class will be handling 
     * the writing of our property name by itself. 
     */
    @Override
    public Boolean isInline() {
        return Boolean.TRUE;
    }

    public String getTransformedFieldName() {
        return this.transformedFieldName;
    }
}

以下是如何使用此自定义转换器:

Following is how to use this custom transformer:

JSONSerializer serializer = new JSONSerializer().transform(new FieldNameTransformer("Name"), "name");

其中原始字段的名称为"name"，但在json输出中，它将替换为Name.

where original field's name is 'name' but in json ouput it will be replaced with Name.

采样:

{"Name":"Abdul Kareem"}

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