JSON使用阿里的fastJson为依赖包JSON使用阿里的fastJson为依赖包JSON使用阿里的fastJson为依赖包gradle依赖管理如下:
compile group: 'com.alibaba', name: 'fastjson', version:'1.2.41'
compile group: 'com.alibaba', name: 'fastjson', version:'1.2.41'1、String转JSONObject1、String转JSONObject1、String转JSONObject前言:String 是JSONObject格式的字符串eg:
JSONObject jSONObject = JSONObject.parseObject(String);
JSONObject jSONObject = JSONObject.parseObject(String);2、String转JSONArray2、String转JSONArray2、String转JSONArray前言:String 是JSONArray格式的字符串eg:
JSONArray jsonArray= JSONArray.parseArray(String);
JSONArray jsonArray= JSONArray.parseArray(String);3、JSONObject中的数组提取为JSONArray3、JSONObject中的数组提取为JSONArray3、JSONObject中的数组提取为JSONArrayeg:
{

"AreaName": "北京",

"CityId": 110100,

"NoMarket": false,

"OldCityId": 646,

"Pinyin": "beijing",

"ProvinceId": 110000,

"Result": [

{

"ItemName": "优惠",

"ItemUrl": "/list/a646c12-1.html",

"Title": "Stelvio 钜惠23.4万起",

"Url": "//www.autohome.com.cn/market/202104/100223763.html"

},

{

"ItemName": "优惠",

"ItemUrl": "/list/a646c12-1.html",

"Title": "马驹桥林肯中心年中大促",

"Url": "//www.autohome.com.cn/market/202106/100230932.html"

},

{

"ItemName": "优惠",

"ItemUrl": "/list/a646c12-1.html",

"Title": "星越平价销售13.58万元起",

"Url": "//www.autohome.com.cn/dealer/202106/367011492.html"

},

{

"ItemName": "优惠",

"ItemUrl": "/list/a646c12-1.html",

"Title": "哈弗F5限时优惠8000元",

"Url": "//www.autohome.com.cn/dealer/202106/366897778.html"

},

{

"ItemName": "优惠",

"ItemUrl": "/list/a646c12-1.html",

"Title": "购元新能源价格暂无优惠",

"Url": "//www.autohome.com.cn/dealer/202106/366897034.html"

},

{

"ItemName": "优惠",

"ItemUrl": "/list/a646c12-1.html",

"Title": "瑞虎3xe冰点价促销中!",

"Url": "//www.autohome.com.cn/dealer/202106/366889724.html"

},

{

"ItemName": "优惠",

"ItemUrl": "/list/a646c12-1.html",

"Title": "购奔奔EV现钜惠5.1万元",

"Url": "//www.autohome.com.cn/dealer/202106/366843204.html"

},

{

"ItemName": "优惠",

"ItemUrl": "/list/a646c12-1.html",

"Title": "购宝马7系价格暂无优惠",

"Url": "//www.autohome.com.cn/dealer/202106/366588080.html"

},

{

"ItemName": "预定",

"ItemUrl": "/list/a646c14-1.html",

"Title": "途观L价格直降7.6万元",

"Url": "//www.autohome.com.cn/dealer/202106/366568937.html"

},

{

"ItemName": "预定",

"ItemUrl": "/list/a646c14-1.html",

"Title": "购凯迪拉克XTS降8万",

"Url": "//www.autohome.com.cn/dealer/202106/366500646.html"

},

{

"ItemName": "预定",

"ItemUrl": "/list/a646c14-1.html",

"Title": "汉兰达可试驾购车无优惠",

"Url": "//www.autohome.com.cn/dealer/202106/366384207.html"

},

{

"ItemName": "预定",

"ItemUrl": "/list/a646c14-1.html",

"Title": "宝马M4价格稳定无优惠",

"Url": "//www.autohome.com.cn/dealer/202106/366156789.html"

},

{

"ItemName": "预定",

"ItemUrl": "/list/a646c14-1.html",

"Title": "奥迪A8促销直降26.33万元",

"Url": "//www.autohome.com.cn/dealer/202106/366925378.html"

},

{

"ItemName": "预定",

"ItemUrl": "/list/a646c14-1.html",

"Title": "英菲尼迪Q50L可降6.3万",

"Url": "//www.autohome.com.cn/dealer/202106/366863516.html"

},

{

"ItemName": "预定",

"ItemUrl": "/list/a646c14-1.html",

"Title": "帝豪新能源价格降8.25万",

"Url": "//www.autohome.com.cn/dealer/202106/366877669.html"

},

{

"ItemName": "预定",

"ItemUrl": "/list/a646c14-1.html",

"Title": "撼路者在售现钜惠5万",

"Url": "//www.autohome.com.cn/dealer/202106/366912121.html"

}

]
}
{

"AreaName": "北京",

"CityId": 110100,

"NoMarket": false,

"OldCityId": 646,

"Pinyin": "beijing",

"ProvinceId": 110000,

"Result": [

{

"ItemName": "优惠",

"ItemUrl": "/list/a646c12-1.html",

"Title": "Stelvio 钜惠23.4万起",

"Url": "//www.autohome.com.cn/market/202104/100223763.html"

},

{

"ItemName": "优惠",

"ItemUrl": "/list/a646c12-1.html",

"Title": "马驹桥林肯中心年中大促",

"Url": "//www.autohome.com.cn/market/202106/100230932.html"

},

{

"ItemName": "优惠",

"ItemUrl": "/list/a646c12-1.html",

"Title": "星越平价销售13.58万元起",

"Url": "//www.autohome.com.cn/dealer/202106/367011492.html"

},

{

"ItemName": "优惠",

"ItemUrl": "/list/a646c12-1.html",

"Title": "哈弗F5限时优惠8000元",

"Url": "//www.autohome.com.cn/dealer/202106/366897778.html"

},

{

"ItemName": "优惠",

"ItemUrl": "/list/a646c12-1.html",

"Title": "购元新能源价格暂无优惠",

"Url": "//www.autohome.com.cn/dealer/202106/366897034.html"

},

{

"ItemName": "优惠",

"ItemUrl": "/list/a646c12-1.html",

"Title": "瑞虎3xe冰点价促销中!",

"Url": "//www.autohome.com.cn/dealer/202106/366889724.html"

},

{

"ItemName": "优惠",

"ItemUrl": "/list/a646c12-1.html",

"Title": "购奔奔EV现钜惠5.1万元",

"Url": "//www.autohome.com.cn/dealer/202106/366843204.html"

},

{

"ItemName": "优惠",

"ItemUrl": "/list/a646c12-1.html",

"Title": "购宝马7系价格暂无优惠",

"Url": "//www.autohome.com.cn/dealer/202106/366588080.html"

},

{

"ItemName": "预定",

"ItemUrl": "/list/a646c14-1.html",

"Title": "途观L价格直降7.6万元",

"Url": "//www.autohome.com.cn/dealer/202106/366568937.html"

},

{

"ItemName": "预定",

"ItemUrl": "/list/a646c14-1.html",

"Title": "购凯迪拉克XTS降8万",

"Url": "//www.autohome.com.cn/dealer/202106/366500646.html"

},

{

"ItemName": "预定",

"ItemUrl": "/list/a646c14-1.html",

"Title": "汉兰达可试驾购车无优惠",

"Url": "//www.autohome.com.cn/dealer/202106/366384207.html"

},

{

"ItemName": "预定",

"ItemUrl": "/list/a646c14-1.html",

"Title": "宝马M4价格稳定无优惠",

"Url": "//www.autohome.com.cn/dealer/202106/366156789.html"

},

{

"ItemName": "预定",

"ItemUrl": "/list/a646c14-1.html",

"Title": "奥迪A8促销直降26.33万元",

"Url": "//www.autohome.com.cn/dealer/202106/366925378.html"

},

{

"ItemName": "预定",

"ItemUrl": "/list/a646c14-1.html",

"Title": "英菲尼迪Q50L可降6.3万",

"Url": "//www.autohome.com.cn/dealer/202106/366863516.html"

},

{

"ItemName": "预定",

"ItemUrl": "/list/a646c14-1.html",

"Title": "帝豪新能源价格降8.25万",

"Url": "//www.autohome.com.cn/dealer/202106/366877669.html"

},

{

"ItemName": "预定",

"ItemUrl": "/list/a646c14-1.html",

"Title": "撼路者在售现钜惠5万",

"Url": "//www.autohome.com.cn/dealer/202106/366912121.html"

}

]
}提取Result对应的数组
JSONArray jsonArray= jsonObject.getJSONArray("Result");
JSONArray jsonArray= jsonObject.getJSONArray("Result");4、JSONArray提取为JSONObject4、JSONArray提取为JSONObject4、JSONArray提取为JSONObjecteg:
JSONObject jsonObject = jsonArray.getJSONObject(0);
JSONObject jsonObject = jsonArray.getJSONObject(0);5、JSONObject获取value5、JSONObject获取value5、JSONObject获取value1、object.getString("key")2、object.get("key")6、获取JSONObject的ket value6、获取JSONObject的ket value6、获取JSONObject的ket value
JSONArray dateArr = new JSONArray();

Set key = dateArr .keySet();

for (String keyObj:key) {

JSONArray hisData = history.getJSONArray(keyObj);


}
JSONArray dateArr = new JSONArray();

Set key = dateArr .keySet();

for (String keyObj:key) {

JSONArray hisData = history.getJSONArray(keyObj);


}7、遍历JSONArray7、遍历JSONArray7、遍历JSONArray
第一种for循环

JSONArray seriesArr = new JSONArray();

for(int i=0;i
JSONObject object = eggsArr.getJSONObject(i);

}


第二种for增强

JSONArray pzListArr = new JSONArray();

for (Object obj:pzListArr) {

JSONObject dataObj = JSONObject.parseObject(obj.toString());

}
第一种for循环

JSONArray seriesArr = new JSONArray();

for(int i=0;i
JSONObject object = eggsArr.getJSONObject(i);

}


第二种for增强

JSONArray pzListArr = new JSONArray();

for (Object obj:pzListArr) {

JSONObject dataObj = JSONObject.parseObject(obj.toString());

}8、
Map paraMap = new HashMap();

JSONObject.toJSONString(paraMap)

Map paraMap = new HashMap();

JSONObject.toJSONString(paraMap)
自动过滤参数为null的数值8、javaBean转为JSONObject未完待续······9、List<实体类>转String9、List<实体类>转String9、List<实体类>转String
import com.alibaba.fastjson.JSONObject;


List<实体类> value1 = 。。。。。。
JSONObject.toJSONString(value1 )10、JSONArray转List<实体类>

import com.alibaba.fastjson.JSONObject;


List<实体类> value1 = 。。。。。。
JSONObject.toJSONString(value1 )10、JSONArray转List<实体类>
看你开心用哪个,object和array的区别没有细究10、JSONArray转List<实体类>10、JSONArray转List<实体类>10、JSONArray转List<实体类>
import com.alibaba.fastjson.JSONArray;
JSONArray objects = JSONArray.parseArray(categoryConstantInfoFromRedis);
List<实体类> categoryConstantInfos = objects.toJavaList(实体类名.class);
众里寻他千百度!!!toJavaList
import com.alibaba.fastjson.JSONArray;
JSONArray objects = JSONArray.parseArray(categoryConstantInfoFromRedis);
List<实体类> categoryConstantInfos = objects.toJavaList(实体类名.class);
众里寻他千百度!!!toJavaList找不到方法的时候,去看看JSONArray,JSONObject的源码,很多都有封装好的,你不会失望的