zoukankan      html  css  js  c++  java
  • java 构造json对象数组

    利用for构造

    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);
            
        }
    }

    输出结果:

    [{"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"}]

    遍历:

    //遍历
            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);
                }
            }
  • 相关阅读:
    基础 ByteBuffer 和 ByteBuf
    Java 堆栈,内存分配理解
    JVM 调优参数设置
    Python 安装 matplotlib 制图
    UOJ#207. 共价大爷游长沙
    ORM学习 一 : JPA JDBC
    常见的Web攻击手段
    《Kubernetes权威指南第2版》学习(二)一个简单的例子
    五 pyJWT使用
    《Kubernetes权威指南第2版》学习(一) Kubernetes是什么
  • 原文地址:https://www.cnblogs.com/pu20065226/p/9809442.html
Copyright © 2011-2022 走看看