java - 如何在 java 编程中模板化 json

Question

我的用例是我有一个 json 文件，但我只需要将其中的几个共享给客户。示例:考虑如下所示的源 json 文件。

{
    "name": "XYZ",
    "age": 24,
    "education": {
        "college": "ppppp",
        "study": "b.tech",
        "grade": 6.8
    },
    "friends": ["kkkk",
    "bbbbbbbbbbb",
    "jjjjjj"],
    "dob":"01-08-1990"
}

对于客户端 1，我必须共享以下输出

{
    "personalInfo": {
        "name": "XYZ",
        "age": 24,
        "friendsNames": ["kkkk","bbbbbbbbbbb","jjjjjj"]
    },
    "educationalInfo": {
        "college": "ppppp",
        "study": "b.tech",
        "grade": 6.8
    }
}

对于客户端 2，我必须共享以下输出

{
    "personalInformation": {
        "nameOfEmployee": "XYZ",
        "ageOfEmployee": 24
    },
    "educationalInformation": {
        "college": "ppppp",
        "study": "b.tech"
    }
}

对于其他客户端，用例也是相同的，我必须跳过一些键并为键指定不同的名称。如何通过某种配置动态地做到这一点。我使用 jsonPath 来实现这一点，但是很难从 json 对象中删除几个键。如有任何建议，我们将不胜感激。

Answer 1

使用JSON 路径 库，例如JayWay .这样，转换您的示例的模板将是:

客户1

{
    "personalInfo": {
        "name": "$.name",
        "age": "$.age",
        "friendsNames": "$.friends"
    },
    "educationalInfo": "$.education"
}

客户2

{
    "personalInformation": {
        "nameOfEmployee": "$.name",
        "ageOfEmployee": "$.age"
    },
    "educationalInformation": {
        "college": "$.education.college",
        "study": "$.education.study"
    }
}

你需要实现的是模板遍历。大约20行代码；或者 40 如果您还需要转换列表元素，例如:

{
    "friends": [ "$.friends[?(@ =~ /.{5,}/)]", {
        "name": "@",
        "since": "$.dob"
    } ]
}

这会导致:

{
    "friends": [ {
        "name": "bbbbbbbbbbb",
        "since": "01-08-1990"
    }, {
        "name": "jjjjjj",
        "since": "01-08-1990"
    } ]
}