json

最新推荐文章于 2025-09-11 10:39:32 发布

转载最新推荐文章于 2025-09-11 10:39:32 发布 · 51 阅读

0 ·

CC 4.0 BY-SA版权

原文链接：http://www.cnblogs.com/xjatj/p/9578126.html

文章标签：

#json #java

本文介绍了一个用于Java项目的JSON处理工具类，包括对象转JSON字符串、JSON字符串转对象、JSON字符串转Map等功能，并提供了示例代码及所需依赖。

import com.fasterxml.jackson.databind.ObjectMapper;

import java.io.IOException;
import java.util.List;
import java.util.Map;

public class JsonUtils {

    private  static  ObjectMapper objectMapper = new ObjectMapper();
    public static String object2Json(Object obj){
        if (obj == null) {
            return "";
        }
        String result = null;
        try {
            result = objectMapper.writeValueAsString(obj);
        } catch (IOException e) {
            e.printStackTrace();
        }
        return result;
    }
    
    public static Map<?, ?> jsonToMap(String json){
        return json2Object(json, Map.class);
    }
    
    public static <T> T json2Object(String json, Class<T> cls){
        T result = null;
        try {
            result =  objectMapper.readValue(json, cls);
        } catch (IOException e) {
            e.printStackTrace();
        }
        
        return result;
    }
    
    public static <T> T conveterObject(Object srcObject, Class<T> destObjectType) {
        String jsonContent = object2Json(srcObject);
        return json2Object(jsonContent, destObjectType);
    }
    
    public static <T> List<T> fromJsonList(String json, Class<T> clazz) throws IOException {
        return objectMapper.readValue(json,objectMapper.getTypeFactory().constructCollectionType(List.class, clazz));
    }

}

<!-- JSON版本管理 -->
<dependency>
   <groupId>com.fasterxml.jackson.core</groupId>
   <artifactId>jackson-databind</artifactId>
   <version>2.4.2</version>
</dependency>

转载于:https://www.cnblogs.com/xjatj/p/9578126.html