如何使用java向现有json文件添加新数据(整数)[已关闭]

2guxujil 于 2022-12-05 发布在 Java

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This is my JSON file(student.json)
{ "studentName": "steve", "studentLocation": [ { "locationArea": "us", "address": { "addressLine1": "xyz", "addressLine2": "abc" }, "locationCode": "123" } ], "startDate": "2023-01-05", "endDate": "2023-02-05" }
need to add new data in existing json file using java code
{ "studentName": "steve", "studentLocation": [ { "locationArea": "us", "address": { "addressLine1": "xyz", "addressLine2": "abc" }, "locationCode": "123" } ], "startDate": "2023-01-05", "endDate": "2023-02-05", "pincode": { ------>new line "pin": 123456 ------>integer value }
}

JSON

来源：https://stackoverflow.com/questions/74654833/how-to-add-a-new-datainteger-to-an-existing-json-file-using-java

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按热度按时间

dba5bblo1#

正确格式化您的代码。将您提供的Json放在代码标记中。下面介绍如何。

如果你想用java编辑一个Json文件，你应该使用一个库，比如gson。

<dependency>
  <groupId>com.google.code.gson</groupId>
  <artifactId>gson</artifactId>
  <version>2.10</version>
</dependency>

如果你使用gson，你可以这样做：

Gson gson = new Gson();
JsonElement element = gson.fromJson(new FileReader("path-to-your-file"))
element.getAsJsonObject().add("pin", new JsonPrimitive(123456))

切勿使用完整路径因为如果您移动项目或将项目交给其他人，完整路径可能不可靠。考虑查看this，以确保无论您的项目位于何处，始终可以找到您的文件。

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如何使用java向现有json文件添加新数据(整数)[已关闭]

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