Java提取JSON数值时遇到数组集合时使用的K-V方式转换

Posted 2020-09-28 多弗朗明哥

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熊孩子新疆无花果成品268g\',\'itemType\': \'ZC\',\'barCode\': \'6924459400256\',\'shelfLife \': 0, \'itemCode\': \'xhzwhggcp_268\'},
{\'itemName\': \'2好孩子新疆无花果成品268g\',\'itemType\': \'ZC\',\'barCode\': \'6924459400256\',\'shelfLife \': 1, \'itemCode\': \'xhzwhggcp_268\'}]}}";
        //String s = "{\'request\': {\'enterpriseid\': 55,\'ownerCode\': \'SunEee01\',\'item\': [{\'itemName\': \'好孩子新疆无花果成品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);
                
            }
        }}