[英]Looping values in JsonObject
我给了自己一个任务,可以在JsonObject内循环值; 例如,我希望我的json看起来像这样:
{
"cusEmail": "...",
"totalQuantity": 11,
"totalCost": 296.89,
"phoneNumber": "844 463 9211",
"address": "...",
"closeShop": "...",
"contact": "By email: and phone call::",
"status": "...",
"orderDate": "2017-15-12",
"deliveryDate": "2017-12-18",
"orderedItems": [
{
"name": "Blue Ribbon",
"manufacture": "Blue Ribbon Brown Plus Low Gi Bread 700g",
"price": 13.99,
"image": "data:image/jpeg;base64,..."
"count": 1
},
{
"name": "Cheese",
"manufacture": "Galbani Mozzarella Cheese 300g",
"price": 49.99,
"image": "data:image/octet-stream;base64,..."
"count": 1
}
]
}
而且我写了这个:
int cartSize = ShoppingCartController.getInstance().myProducts.size();
String[] nameString = new String[cartSize];
String[] imageString = new String[cartSize];
Integer[] qauntityInteger = new Integer[cartSize];
String[] manufactureString = new String[cartSize];
Double[] priceDouble = new Double[cartSize];
JsonObjectBuilder jsonObject = null;
for ( int i = 0; i < cartSize; i++ ){
Item myProducts = ShoppingCartController.getInstance().myProducts.get(i);
nameString[i] = myProducts.getName();
manufactureString[i] = myProducts.getManufacture();
priceDouble[i] = myProducts.getPrice();
imageString[i] = myProducts.getImage();
qauntityInteger[i] = myProducts.getQuantity();
jsonObject = Json.createObjectBuilder()
.add("name", nameString[i])
.add("manufacture", manufactureString[i])
.add("price", priceDouble[i])
.add("image", imageString[i])
.add("count", qauntityInteger[i]);
}
JsonObject jsonParams = Json.createObjectBuilder()
.add("cusEmail", email)
.add("totalQuantity", quantity)
.add("totalCost", totalCost)
.add("phoneNumber", phoneNumber)
.add("address", address)
.add("closeShop", closeShop)
.add("contact", contact)
.add("status", "ordered")
.add("orderDate", dateFormat.format(orderDate))
.add("deliveryDate", delDate)
.add("orderedItems", Json.createArrayBuilder()
.add(jsonObject))
.build();
当然的JSONObject将返回循环,这将被单独添加的最后一个对象。
如何循环并将所有对象添加到我的arrayBuilder中?
JSONObject cart = new JSONObject();
cart.put("cusEmail", email);
cart.put("totalQuantity", quantity);
cart.put("totalCost", totalCost);
cart.put("phoneNumber", phoneNumber);
cart.put("address", address);
cart.put("closeShop", closeShop);
cart.put("contact", contact);
cart.put("status", "ordered");
cart.put("orderDate", dateFormat.format(orderDate));
cart.put("deliveryDate", delDate);
JSONArray objects = new JSONArray();
JSONObject obj;
for (int i = 0; i < 5; i++) {
obj = new JSONObject();
obj.put("name", nameString[i]);
obj.put("manufacture", manufactureString[i]);
obj.put("price", priceDouble[i]);
obj.put("image", imageString[i]);
obj.put("count", qauntityInteger[i]);
objects.add(obj);
}
cart.put("orderedItems", objects);
您需要首先创建数组构建器,添加所有json对象,然后构建数组并将其添加到根对象:
JsonArrayBuilder array = Json.createArrayBuilder();
for ( int i = 0; i < cartSize; i++ ){
...
array.add(Json.createObjectBuilder()
.add("name", nameString[i])
.add("manufacture", manufactureString[i])
.add("price", priceDouble[i])
.add("image", imageString[i])
.add("count", qauntityInteger[i]));
}
JsonObject jsonParams = Json.createObjectBuilder()
.add("cusEmail", email)
.add("totalQuantity", quantity)
.add("totalCost", totalCost)
.add("phoneNumber", phoneNumber)
.add("address", address)
.add("closeShop", closeShop)
.add("contact", contact)
.add("status", "ordered")
.add("orderDate", dateFormat.format(orderDate))
.add("deliveryDate", delDate)
.add("orderedItems", array.build())
.build();
查看docs中的示例,您可以拥有一个JsonArrayBuilder ,可以在其中添加JsonObjects,例如:
JsonArrayBuilder arrayBuilder = Json.createArrayBuilder();
arrayBuilder.add(jsonObject);
然后,将数组添加到最终的JsonObject中,如下所示:
JsonObject jsonParams = Json.createObjectBuilder()
.add("cusEmail", email)
...
.add("orderedItems", arrayBuilder.build());
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