当我想让我的程序能够使用GSON更改JSON文件中的值时，我正在对应用程序进行编程。例如，如果我有一个带键"totalRaffles":"0"之一的JSON文件，我希望能够将整数0更改为其他值。在这种情况下，这是我的JSON文件：
JSON文件：
{
"shoes": [
{
"shoeName": "Nike React Presto",
"shoePrice": "120",
"brand": "Nike",
"typeOfShoes": "Running",
"style": "Men's Shoe",
"colors": [
"Blue",
"Green",
"Pink",
"Aqua",
"Yellow"
],
"sizes": [
"4",
"4.5",
"5"
],
"description": "Inspired by the early 2000s original, the Nike Presto React puts an exaggerated spin on an unconventional icon. Nike React foam delivers an expressive look with a lightweight, bouncy feel and a whole lot of personality.",
"shipping": "0",
"tax": "0",
"subtotal": "0",
"review": "5",
"totalRaffles": "0",
"imageURLs": [
"https://c.static-nike.com/a/images/t_PDP_864_v1/f_auto,b_rgb:f5f5f5/zl49g5yxcibxdrsigngb/react-presto-mens-shoe-c4Rbf6.jpg",
"https://c.static-nike.com/a/images/t_prod_ss/w_960,c_limit,f_auto/jablbmfxdynwjvbgxzh1/nike-react-presto-brutal-honey-release-date.jpg",
"https://c.static-nike.com/a/images/t_prod_ss/w_960,c_limit,f_auto/jqzhsqisjcmbhozrwefr/nike-react-presto-brutal-honey-release-date.jpg",
"https://c.static-nike.com/a/images/t_prod_ss/w_960,c_limit,f_auto/tq0vsbg8yaa3ojia8fkx/nike-react-presto-brutal-honey-release-date.jpg"
],
"isSold": "false"
},
{
"shoeName": "Nike Air Zoom Pegasus 36 Trail",
"shoePrice": "130",
"brand": "Nike",
"typeOfShoes": "Running",
"style": "Women's Shoe",
"colors": [
"Yellow",
"Green",
"Aqua",
"Blue",
"Pink"
],
"sizes": [
"5",
"5.5",
"6"
],
"description": "An icon hits the paths less traveled in the Nike Air Zoom Pegasus 36 Trail. Perforated mesh upper offers breathable comfort, and double Zoom Air units cushion your stride. Outsole lugs optimize traction when running uphill.",
"shipping": "0",
"tax": "0",
"subtotal": "0",
"review": "0",
"totalRaffles": "0",
"imageURLs": [
"https://c.static-nike.com/a/images/t_PDP_864_v1/f_auto,b_rgb:f5f5f5/d6yfuqvqp7l6os3oswll/air-zoom-pegasus-36-trail-womens-running-shoe-vF7D4W.jpg",
"https://c.static-nike.com/a/images/t_PDP_864_v1/f_auto,b_rgb:f5f5f5,q_80/bnboer2ecdimuy693qw1/air-zoom-pegasus-36-trail-womens-running-shoe-vF7D4W.jpg",
"https://c.static-nike.com/a/images/t_PDP_864_v1/f_auto,b_rgb:f5f5f5,q_80/znolfda4rdgvxcaz1dpl/air-zoom-pegasus-36-trail-womens-running-shoe-vF7D4W.jpg",
"https://c.static-nike.com/a/images/t_PDP_864_v1/f_auto,b_rgb:f5f5f5,q_80/qutm7re9hzxoua97vund/air-zoom-pegasus-36-trail-womens-running-shoe-vF7D4W.jpg"
],
"isSold": "false"
},
{
"shoeName": "Nike Air Zoom Wildhorse 5",
"shoePrice": "110",
"brand": "Nike",
"typeOfShoes": "Running",
"style": "Men's Shoe",
"colors": [
"Pink",
"Aqua",
"Red",
"Black",
"Gray"
],
"sizes": [
"6",
"6.5",
"7",
"7.5",
"8"
],
"description": "Built specifically for trails, the Nike Air Zoom Wildhorse 5 keeps you galloping over rough terrain in breathable, multi-layer fabric. A rock plate helps shield your foot, while a Zoom Air heel unit cushions your stride on and off the path.",
"shipping": "0",
"tax": "0",
"subtotal": "0",
"review": "5",
"totalRaffles": "0",
"imageURLs": [
"https://c.static-nike.com/a/images/t_PDP_864_v1/f_auto,b_rgb:f5f5f5/podtc6tfkrrrdtm9br5k/air-zoom-wildhorse-5-mens-running-shoe-lMslPS.jpg",
"https://c.static-nike.com/a/images/t_PDP_864_v1/f_auto,b_rgb:f5f5f5,q_80/byjlvjfbmcvzq7vcieze/air-zoom-wildhorse-5-mens-running-shoe-lMslPS.jpg",
"https://c.static-nike.com/a/images/t_PDP_864_v1/f_auto,b_rgb:f5f5f5,q_80/r9jwzrbf0uxuspoorq6f/air-zoom-wildhorse-5-mens-running-shoe-lMslPS.jpg",
"https://c.static-nike.com/a/images/t_PDP_864_v1/f_auto,b_rgb:f5f5f5,q_80/cmbqldjtyaocthwmk8xl/air-zoom-wildhorse-5-mens-running-shoe-lMslPS.jpg"
],
"isSold": "false"
}
]
}
系统会为您提供鞋子索引（0、1或2），以确定您要更改哪个鞋子的totalRaffles密钥。
您将如何做？
答案 0 :(得分：1)
您需要将其解析为一个对象，编辑该对象中的字段，然后再次对其进行序列化
如果您需要进行许多更改，则应一次完成所有操作
解析对象时，最好创建一个简单的类来解析对象
对于第一个，类似：
public class Shoes {Shoe [] shoes;}
鞋子：
public class Shoe {
String shoeName;
String shoeSize;
int totalRaffles;
...
}
要进行编辑，请转至反序列化的结果，该结果将是Shoes对象
然后找到您需要编辑的那个
ShoesIntance.shoes[index].totalRaffles = 2;
使用gson序列化它，应该是它
答案 1 :(得分：0)
只需使用addProperty（key，value）函数，如果属性键已经存在，它将覆盖其值：）
例如，它将是：
yourGsonArray.get(index).getAsJsonObject().addProperty("totalRaffles", 1);