java 構造json對象數組

利用for構造

import com.google.gson.JsonArray;
import com.google.gson.JsonObject;

public class Test {
    public static void main(String[] args) {
        final JsonArray listArray = new JsonArray();
        final JsonObject object = new JsonObject();
        for (int i = 0; i < 5; i++) {
            final JsonObject obj = new JsonObject();
            for (int n = 0; n < 3; n++) {
                obj.addProperty("col" + n, "val" + i + n);
            }
            listArray.add(obj);
        }

        System.out.println(listArray);
        
    }
}

 

輸出結果：

[{"col0":"val00","col1":"val01","col2":"val02"},
{"col0":"val10","col1":"val11","col2":"val12"},
{"col0":"val20","col1":"val21","col2":"val22"},
{"col0":"val30","col1":"val31","col2":"val32"},
{"col0":"val40","col1":"val41","col2":"val42"}]

遍歷：

//遍歷
        String key, value;
        String jsonString="[{\"Id\":\"111\",\"AcceptNum\":222,\"ArchiveNum\":333,\"ArchivRate\":444,\"CUR_DATA_DT\":555},{\"Id\":\"112\",\"AcceptNum\":222,\"ArchiveNum\":333,\"ArchivRate\":444,\"CUR_DATA_DT\":555}]";
        JsonArray listArray=new  JsonParser().parse(jsonString).getAsJsonArray();
        for (int i = 0; i < listArray.size(); i++) {
            JsonObject obj = new JsonObject();
            obj = listArray.get(i).getAsJsonObject();
            //jsonString="{\"Id\":\"111\",\"AcceptNum\":222,\"ArchiveNum\":333,\"ArchivRate\":444,\"CUR_DATA_DT\":555}";
            //obj=new  JsonParser().parse(jsonString).getAsJsonObject();
            //vlaue=obj.get("AcceptNum").toString().replace("\"", "");
            final Iterator iterator = obj.entrySet().iterator();
            while (iterator.hasNext()) {
                final Map.Entry entry = (Map.Entry) iterator.next();
                key = (String) entry.getKey();
                value = obj.get(key).toString().replace("\"", "");
                System.out.println(key + "====" + value);
            }
        }