Jackson中反序列化json字符串时key的格式调整

最新推荐文章于 2024-07-23 04:10:31 发布

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最新推荐文章于 2024-07-23 04:10:31 发布

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分类专栏： Java 文章标签： json java jvm

本文链接：https://blog.youkuaiyun.com/qq_16733389/article/details/129182734

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PropertyNamingStrategy.KEBAB_CASE

package com.llq;

import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.PropertyNamingStrategy;

import java.util.HashMap;

class TestClass {

    public static void main(String[] args) throws JsonProcessingException {
        ObjectMapper mapper = new ObjectMapper();
        mapper.setPropertyNamingStrategy(PropertyNamingStrategy.KEBAB_CASE);
        HashMap<Object, Object> map = new HashMap<>();
        map.put("data-key", "123");
        String value = mapper.writerWithDefaultPrettyPrinter().writeValueAsString(map);
        A a = mapper.readValue(value, A.class);
        System.out.println(a);
    }
}

class A {
    private String dataKey;

    public String getDataKey() {
        return dataKey;
    }

    public void setDataKey(String dataKey) {
        this.dataKey = dataKey;
    }

    @Override
    public String toString() {
        return "A{" +
                "dataKey='" + dataKey + '\'' +
                '}';
    }
}

运行结果：
在这里插入图片描述
PropertyNamingStrategy.SNAKE_CASE

package com.llq;

import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.PropertyNamingStrategy;

import java.util.HashMap;

class TestClass {

    public static void main(String[] args) throws JsonProcessingException {
        ObjectMapper mapper = new ObjectMapper();
        mapper.setPropertyNamingStrategy(PropertyNamingStrategy.SNAKE_CASE);
        HashMap<Object, Object> map = new HashMap<>();
        map.put("data_key", "123");
        String value = mapper.writerWithDefaultPrettyPrinter().writeValueAsString(map);
        A a = mapper.readValue(value, A.class);
        System.out.println(a);
    }
}

class A {
    private String dataKey;

    public String getDataKey() {
        return dataKey;
    }

    public void setDataKey(String dataKey) {
        this.dataKey = dataKey;
    }

    @Override
    public String toString() {
        return "A{" +
                "dataKey='" + dataKey + '\'' +
                '}';
    }
}