JSON -2024/11/2

JSON 本质就是一个字符串
JSON 串的键要求必须使用双引号括起来，而值根据要表示的类型确定
导入依赖

<!-- https://mvnrepository.com/artifact/taglibs/standard -->
        <dependency>
            <groupId>taglibs</groupId>
            <artifactId>standard</artifactId>
            <version>1.1.2</version>
        </dependency>

java和json之间的转换

//将java转化为json字符串
        User user = new User(1, "zhangsan", "123");
        String jsonString = JSON.toJSONString(user);
        System.out.println(jsonString);
        //将json字符串转为java
        User u = JSON.parseObject(jsonString, User.class);
        System.out.println(u);