如何从JSON流中删除特殊字符,以便我可以使用gson API将JSON对象转换为JAVA对象? [英] How to remove special characters from JSON stream, so that I can use gson API to convert JSON objects to JAVA objects?
问题描述
我正尝试使用Google gson API将JSON对象序列化为java对象。
我需要从序列化中删除这个流中的特殊字符。
我该如何做到这一点?
这是我从请求中获得的JSON对象:
{color:北极白,imageUrl:http://www.xyz.com/images/z/1/7/8/8/2/1/1788212-p-DETAILED.jpg styleId: 1788212, originalPrice: $ 64.95, 价格: $ 64.95, PRODUCTURL: http://www.xyz.com/product/7515478/color/51609,然而,当我尝试使用Google的gson API将其反序列化为JAVA对象时,它需要没有任何特殊字符的JSON对象,因此它遇到'$'和'%'时会引发异常。如何在不影响其他json对象的情况下摆脱这些字符,即将json结果作为字符串获取。
完美如预期。不需要从JSON流中移除这些特殊字符以将其转换为Java对象。
请看下面的示例代码:
BufferedReader阅读器= new BufferedReader(new FileReader(new File(json.txt)));
MyJSONObject data = new Gson()。fromJson(reader,MyJSONObject.class);
System.out.println(new GsonBuilder()。setPrettyPrinting()。create()。toJson(data));
class MyJSONObject {
private String color;
private String imageUrl;
private String styleId;
private String originalPrice;
私人字符串价格;
private String productUrl;
私人字符串percentOff;
// getter& setter
}
输出:(由于受到StackOverflow的限制,我从输出中删除了URL网站)
{
color:Arctic White,
styleId:1788212 ,
originalPrice:$ 64.95,
price:$ 64.95,
percentOff:0%
}
您可以使用 JsonDeserializer 按照您的需要对其进行反序列化。
我已经发布了一个示例代码。找到它这里
编辑
是使用 JsonDeserializer
的示例代码。
示例代码:
BufferedReader reader = new BufferedReader(new FileReader(new File(resources / json29.txt)));
class MyJSONObject {
private String color;
private String imageUrl;
private String styleId;
私人双原创价格;
私人双重价格;
private String productUrl;
private double percentOff;
// getter& setter
}
class MyJSONObjectDeserializer实现了JsonDeserializer< MyJSONObject> {
$ b $ @Override
public MyJSONObject deserialize(final JsonElement json,final Type typeOfT,$ b $ final JsonDeserializationContext context)throws JsonParseException {
JsonObject jsonObject = json .getAsJsonObject();
MyJSONObject myJSONObject = new MyJSONObject();
myJSONObject.setColor(jsonObject.get(color)。getAsString());
myJSONObject.setImageUrl(jsonObject.get(imageUrl)。getAsString());
myJSONObject.setStyleId(jsonObject.get(styleId)。getAsString());
myJSONObject.setProductUrl(jsonObject.get(productUrl)。getAsString());
尝试{
String price = jsonObject.get(price)。getAsString();
String originalPrice = jsonObject.get(originalPrice)。getAsString();
String percentOff = jsonObject.get(percentOff)。getAsString();
myJSONObject.setPrice(Double.valueOf(price.substring(1)));
myJSONObject.setOriginalPrice(Double.valueOf(originalPrice.substring(1)));
myJSONObject.setPercentOff(Double.valueOf(percentOff.substring(0,
percentOff.length() - 1)));
} catch(NumberFormatException e){
e.printStackTrace();
}
返回myJSONObject;
$ b $ MyJSONObject data = new GsonBuilder()
.registerTypeAdapter(MyJSONObject.class,new MyJSONObjectDeserializer())。create()
。 fromJson(reader,MyJSONObject.class);
System.out.println(new GsonBuilder()。setPrettyPrinting()。create()。toJson(data));
I am trying to use Google gson API to serialize JSON objects to java objects. I need to remove special characters from this stream for the serialization. How do I achieve this?
This is the JSON object I get from the request:
{"color":"Arctic White","imageUrl":"http://www.xyz.com/images/z/1/7/8/8/2/1/1788212-p-DETAILED.jpg","styleId":"1788212","originalPrice":"$64.95","price":"$64.95","productUrl":"http://www.xyz.com/product/7515478/color/51609","percentOff":"0%"}
However, when I try to use Google's gson API to deserialize it to JAVA object- it needs JSON object without any special characters and hence it throws an exception when it encounters '$' and '%'. How can I get rid of these characters without affecting rest of the json object i.e. json result obtained as a string.
It works perfectly as expected. There is no need to remove these special characters from JSON stream to convert it into Java object.
Please have a look at below sample code:
BufferedReader reader = new BufferedReader(new FileReader(new File("json.txt")));
MyJSONObject data = new Gson().fromJson(reader, MyJSONObject.class);
System.out.println(new GsonBuilder().setPrettyPrinting().create().toJson(data));
class MyJSONObject {
private String color;
private String imageUrl;
private String styleId;
private String originalPrice;
private String price;
private String productUrl;
private String percentOff;
// getter & setter
}
output: (I have deleted URLs from the output due to constrain of StackOverflow site)
{
"color": "Arctic White",
"styleId": "1788212",
"originalPrice": "$64.95",
"price": "$64.95",
"percentOff": "0%"
}
You can try with JsonDeserializer to deserializer it as per your need.
I have already posted a sample code on it. Find it HERE
EDIT
Here is the sample code using JsonDeserializer
.
Sample code :
BufferedReader reader = new BufferedReader(new FileReader(new File("resources/json29.txt")));
class MyJSONObject {
private String color;
private String imageUrl;
private String styleId;
private double originalPrice;
private double price;
private String productUrl;
private double percentOff;
// getter & setter
}
class MyJSONObjectDeserializer implements JsonDeserializer<MyJSONObject> {
@Override
public MyJSONObject deserialize(final JsonElement json, final Type typeOfT,
final JsonDeserializationContext context) throws JsonParseException {
JsonObject jsonObject = json.getAsJsonObject();
MyJSONObject myJSONObject = new MyJSONObject();
myJSONObject.setColor(jsonObject.get("color").getAsString());
myJSONObject.setImageUrl(jsonObject.get("imageUrl").getAsString());
myJSONObject.setStyleId(jsonObject.get("styleId").getAsString());
myJSONObject.setProductUrl(jsonObject.get("productUrl").getAsString());
try {
String price = jsonObject.get("price").getAsString();
String originalPrice = jsonObject.get("originalPrice").getAsString();
String percentOff = jsonObject.get("percentOff").getAsString();
myJSONObject.setPrice(Double.valueOf(price.substring(1)));
myJSONObject.setOriginalPrice(Double.valueOf(originalPrice.substring(1)));
myJSONObject.setPercentOff(Double.valueOf(percentOff.substring(0,
percentOff.length() - 1)));
} catch (NumberFormatException e) {
e.printStackTrace();
}
return myJSONObject;
}
}
MyJSONObject data = new GsonBuilder()
.registerTypeAdapter(MyJSONObject.class, new MyJSONObjectDeserializer()).create()
.fromJson(reader, MyJSONObject.class);
System.out.println(new GsonBuilder().setPrettyPrinting().create().toJson(data));
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