【Java】提取JSON数值时遇到数组集合时使用的K-V方式转换

时间:2022-03-21 22:10:31

1.实体类转换方法

参照文章:http://www.cnblogs.com/dflmg/p/6933811.html

2.K-V方法(此方法比较笨,但是没有办法,我现在不知道有没有相关的简单API,只能自己手动拼出一个方法。import org.apache.commons.lang.StringUtils;)

String s = "{'request': {'enterpriseid': 55,'ownerCode': 'SunEee01','item': [{'itemName': '1熊孩子*无花果成品268g','itemType': 'ZC','barCode': '6924459400256','shelfLife ': 0, 'itemCode': 'xhzwhggcp_268'},
{'itemName': '2好孩子*无花果成品268g','itemType': 'ZC','barCode': '6924459400256','shelfLife ': 1, 'itemCode': 'xhzwhggcp_268'}]}}";
//String s = "{'request': {'enterpriseid': 55,'ownerCode': 'SunEee01','item': [{'itemName': '好孩子*无花果成品268g','itemType': 'ZC','barCode': '6924459400256','shelfLife ': 1, 'itemCode': 'xhzwhggcp_268'}]}}";
JSONObject jsonObject = JSONObject.fromObject(s);
//System.out.println(jsonObject); String request = jsonObject.getString("request");
//System.out.println(request); JSONObject vendorDO = JSONObject.fromObject(request);
//System.out.println(vendorDO); String ent = vendorDO.getString("item");
//对象实体类的方法System.out.println(ent);
/*JSONArray ents = vendorDO.getJSONArray("item");
List<Item> ss = (List<Item>)JSONArray.toList(ents,Item.class);
for(Item x:ss){
//如果item里面还有List对象作为属性就使用1的方法,参见http://www.cnblogs.com/dflmg/p/6933811.html
System.out.println(x.getItemName());
}*/ String[] many = ent.split("\\},\\{"); if(many.length==1){
String one = many[0].substring(1,ent.length()-1); JSONObject joss = JSONObject.fromObject(one);
String itemName = joss.getString("itemName");
System.out.println(itemName); }else{
for(int i=0;i<many.length;i++){
if(i==0){
String frist = many[i].substring(1)+"}"; JSONObject joss = JSONObject.fromObject(frist);
String itemName = joss.getString("itemName");
System.out.println(itemName); }else if(i==many.length-1){
String middle = "{"+StringUtils.substringBefore(many[i], "]"); JSONObject joss = JSONObject.fromObject(middle);
String itemName = joss.getString("itemName");
System.out.println(itemName);
}else{
String last = "{"+many[i]+"}"; JSONObject joss = JSONObject.fromObject(last);
String itemName = joss.getString("itemName");
System.out.println(itemName); }
}}