List和json数组的转换（赋源代码）

public class a11111111 {
    
    //参数obj可以是 json对象，字符串， list
    public  static void fun(Object obj){
         JSONArray data = JSONArray.fromObject(obj);    
         for(int i=0;i<data.size();i++){
              JSONObject jobj =  (JSONObject) data.get(i);
              System.out.println(jobj);
              /**
               *{"aid":3201,"name":"品牌","cid":"1351"}
                {"aid":7716,"name":"类型","cid":"1351"}
                {"aid":8668,"name":"价格","cid":"1351"}
               */        
             String name = (String)jobj.get("name");
             System.out.println(name); //  品牌  类型    价格
         } 
      } 
    
    
     public static void main(String[] args) { 
     　 //制作string
 　　　　//String list = request.getParameter("json"); 
        String str9 = " [{"aid":3201,"name":"品牌","cid":"1351"}, {"aid":7716,"name":"类型","cid":"1351"},  {"aid":8668,"name":"价格","cid":"1351"}] " ;
        fun(str9);
    
        // 制作一个list
         List<Object> list90 = new ArrayList<Object>();
         JSONArray data = JSONArray.fromObject(str9);    
         for(int i=0;i<data.size();i++){
              JSONObject jobj =  (JSONObject) data.get(i);
              list90.add(jobj); // 将一个json数组转成list
              /**
               *{"aid":3201,"name":"品牌","cid":"1351"}
                {"aid":7716,"name":"类型","cid":"1351"}
                {"aid":8668,"name":"价格","cid":"1351"}
               */        
         } 
        
         fun(list90);  //调用的2个函数结果都是一样的，一样的
         
         String str_0 = list90.toString();
         fun(str_0);  //结果都是一样的
             
     } }