com.alibaba.fastjson把JSONObject的一些操作

拼搏现实的明天。 2022-05-24 11:04 290阅读 0赞

## JSONObject 转map遍历和直接JSONObject遍历 ##

看JSONObject源码知：

![70][]

String jsonStr = "{\"size\":\"7.5\",\"width\":\"M (B)\"}";
    
            System.out.println("无序遍历结果：");
            JSONObject jsonObj = JSON.parseObject(jsonStr);
            for (Map.Entry<String, Object> entry : jsonObj.entrySet()) {
                System.out.println(entry.getKey() + ":" + entry.getValue());
            }
    
            System.out.println("-------------------");
            System.out.println("有序遍历结果：");
            LinkedHashMap<String, String> jsonMap = JSON.parseObject(jsonStr, new TypeReference<LinkedHashMap<String, String>>() {
            });
            for (Map.Entry<String, String> entry : jsonMap.entrySet()) {
                System.out.println(entry.getKey() + ":" + entry.getValue());
            }

JSONObject obj = new JSONObject();
    {
    obj.put("key1", "value1");
    obj.put("key2", "value2");
    obj.put("key3", "value3");
    }
    Map<String, String> params = JSONObject.parseObject(obj.toJSONString(), new TypeReference<Map<String, String>>(){});
    System.out.println(params);
    
    //输出：{key3=value3, key2=value2, key1=value1}

String dataAes = AES.decryptFromBase64(data, aeskey);
    JSONObject jsonObj = JSONObject.parseObject(dataAes);
    
    /*
     * 直接遍历  无序遍历
     */
    for (Map.Entry<String, Object> entry : jsonObj.entrySet()) {
        System.out.println(entry.getKey() + ":" + entry.getValue());
        map.put( entry.getKey(), (String)entry.getValue());
    }
    
    /*
     * 转为map后再遍历
     */
    /*Map<String, String> params = JSONObject.parseObject(jsonObj.toJSONString(), new TypeReference<Map<String, String>>(){});
    System.out.println(params);
    
    for (Map.Entry<String, String> entry : params.entrySet()) {
    
        System.out.println("Key = " + entry.getKey() + ", Value = " + entry.getValue());
        map.put( entry.getKey(), entry.getValue());
    }*/

完成！

[70]: /images/20220524/adaf56bba0d44976a7f3f21aa976f1ad.png