使用Gson处理Json串

使用Json遍历规则的Json串：

使用Gson来处理，主要是将对应的json串和具体的类来映射

public class TestJson {
    public Stringmessage;
    public String status;
    public List<Special> data;
    public void setMessage(Stringmessage) {
        this.message = message;
    }
    public StringgetMessage() {
        return message;
    }
    public void setStatus(String status) {
        this.status = status;
    }

    public StringgetStatus() {
        return status;
    }
    public void setData(List<Special>data) {
        this.data = data;
    }
    public List<Special>getData() {
        return data;
    }
}
class Special implementsSerializable {
    public List<Special>children;
    public Data data;

    public List<Special> getChildren() {
        return children;
    }
    public void setChildren(List<Special>children) {
        this.children = children;
    }

    public DatagetData() {
        return data;
    }
    public void setData(Data data) {
        this.data = data;
    }
}

class Data implementsSerializable {
    public Stringid;
    public String groupId;
    public String text;

    public void setId(Stringid) {
        this.id = id;
    }

    public StringgetId() {
        return id;
    }

    public void setGroupId(String groupId){
        this.groupId = groupId;
    }
    public StringgetGroupId() {
        return groupId;
    }

    public void setText(String text) {
        this.text = text;
    }

    public StringgetText() {
        return text;
    }
}
class TestB {
    public static List<Data> allData=new ArrayList<>();
    public static void main(String[] args){
        String dataList="";//构造成json串
        Gson gson = new Gson();
        TestJson viewList = gson.fromJson(dataList,
                new TypeToken<TestJson>() {
                }.getType());

        List<Special> list= viewList.getData();
        //读取里面的每一个Special类，然后将每一个里面的data类读取出来
        addBean(list);
    }
    public static void addBean(List<Special>list) {
        for (Specialsp : list) {
            allData.add(sp.getData());
            if (sp.getChildren().size() > 0) {
                //再将子children放入集合中遍历
                addBean(sp.getChildren());
            }
        }
    }
}

第二种是，在遍历的时候修改或者增加某个节点值：

public class TestJson implements Serializable{
    public static void main(String[] args) {
        String te ="";
        Object obj = new Gson().fromJson(te,new TypeToken<Object>(){}.getType());
        Map res = (Map) obj;
        addT(res.get("data"));
        System.out.println(new Gson().toJson(obj));
    }

    public static void addT(Object obj){
        Map bean = (Map) obj;
        if ("sum".equals(bean.get("value"))){
            List childrenList = (List) bean.get("children");
            for (Object children: childrenList){
                Map map = (Map) children;

                if ("dqpwbyin".equals(map.get("id"))){
                    map.put("text","我把所有id为dqpwbyin的text改成了这句话");
                }
                if ("sum".equals(map.get("value"))){
                    addT(map);
                }
            }
        }

    }
}