JSON 模式到 Javascript 类型对象

使用 JSON 模式将数据转换为 JavaScript 类型对象是在开发过程中经常遇到的任务之一。JSON（JavaScript Object Notation）是一种轻量级的数据交换格式，常用于前后端数据传输和存储。在JavaScript中，可以通过将JSON字符串解析为对象，或者将对象转换为JSON字符串来实现数据的传输和处理。

const personJSON = '{"name": "John", "age": 30, "city": "New York"}';
const personObj = JSON.parse(personJSON);
console.log(personObj);

{ name: 'John', age: 30, city: 'New York' }

const personObj = { name: 'John', age: 30, city: 'New York' };
const personJSON = JSON.stringify(personObj);
console.log(personJSON);

{"name":"John","age":30,"city":"New York"}

json
{
  "type": "object",
  "properties": {
    "name": { "type": "string" },
    "age": { "type": "number", "minimum": 0 },
    "city": { "type": "string" }
  },
  "required": ["name", "age"]
}

javascript
const Ajv = require('ajv');
const ajv = new Ajv();
const validate = ajv.compile(personSchema);
const personObj = {
  name: 'John',
  age: 30,
  city: 'New York'
};
const isValid = validate(personObj);
console.log(isValid); // true

javascript
const Ajv = require('ajv');
const ajv = new Ajv();
// 定义JSON模式
const personSchema = {
  type: 'object',
  properties: {
    name: { type: 'string' },
    age: { type: 'number', minimum: 0 },
    city: { type: 'string' }
  },
  required: ['name', 'age']
};
// 将JSON字符串解析为JavaScript对象
const personJSON = '{"name": "John", "age": 30, "city": "New York"}';
const personObj = JSON.parse(personJSON);
// 验证数据有效性
const validate = ajv.compile(personSchema);
const isValid = validate(personObj);
// 输出结果
console.log(personObj);
console.log(isValid);