如何使用Gson解析相同字段但不同类型的JSON

Question

 { "contents": [ { "type": "image", "data": {//data at here is Object "attachment": "picurl", "width": 600, "height": 398 } }, { "type": "text", "data": "聊过往，聊里"//data at here is String type } ] } 

how can i make the class to express this json with gson?

i try to make the class to express it but fail.

Answer 1

please follow below structure code . change datatype according to structure

package Trans;

import java.util.List;

public class Demo {

    List<Contents> contentsList;
    String type;
    String data;
    public List<Contents> getContentsList() {
        return contentsList;
    }
    public void setContentsList(List<Contents> contentsList) {
        this.contentsList = contentsList;
    }
    public String getType() {
        return type;
    }
    public void setType(String type) {
        this.type = type;
    }
    public String getData() {
        return data;
    }
    public void setData(String data) {
        this.data = data;
    }


}

class Data
{
    String attachment;
    int height;
    int width;

    public String getAttachment() {
        return attachment;
    }
    public void setAttachment(String attachment) {
        this.attachment = attachment;
    }
    public int getHeight() {
        return height;
    }
    public void setHeight(int height) {
        this.height = height;
    }
    public int getWidth() {
        return width;
    }
    public void setWidth(int width) {
        this.width = width;
    }


}

class Contents
{
    String type;
    List<Data> dataList;

    public String getType() {
        return type;
    }
    public void setType(String type) {
        this.type = type;
    }
    public List<Data> getDataList() {
        return dataList;
    }
    public void setDataList(List<Data> dataList) {
        this.dataList = dataList;
    }
}

Answer 2

This tool may be of some help to you

http://www.jsonschema2pojo.org/