Jackson工具类
2022/4/7 23:49:54
本文主要是介绍Jackson工具类,对大家解决编程问题具有一定的参考价值,需要的程序猿们随着小编来一起学习吧!
package com.sasworld.util; import com.fasterxml.jackson.annotation.JsonInclude; import com.fasterxml.jackson.core.JsonParser; import com.fasterxml.jackson.databind.DeserializationFeature; import com.fasterxml.jackson.databind.JavaType; import com.fasterxml.jackson.databind.ObjectMapper; import java.io.IOException; import java.text.SimpleDateFormat; import java.util.List; public class JacksonUtil { static ObjectMapper objectMapper = new ObjectMapper(); static { // 忽略json串中多余的字段 objectMapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false); objectMapper.setDateFormat(new SimpleDateFormat("yyyy-MM-dd HH:mm:ss")); objectMapper.configure(JsonParser.Feature.ALLOW_COMMENTS, true); } public static <T> T parseObject(String json, Class<T> clazz) { try { return objectMapper.readerFor(clazz).readValue(json); } catch (IOException e) { throw new RuntimeException(e); } } public static String writeAsJsonString(Object object) { try { return objectMapper.writeValueAsString(object); } catch (IOException e) { throw new RuntimeException(e); } } public static <T> List<T> jsonString2List(String jsonString, Class<T> clazz) { try { JavaType javaType = getObjectiveJavaType(List.class, clazz); return objectMapper.readerFor(javaType).readValue(jsonString); } catch (IOException e) { throw new RuntimeException(e); } } /** * 对象转换为json字符串,忽略空值 */ public static String writeAsJsonStringIgnoreNull(Object object) { try { objectMapper.setSerializationInclusion(JsonInclude.Include.NON_NULL); return objectMapper.writeValueAsString(object); } catch (IOException e) { throw new RuntimeException(e); } } /** * 获取集合的JavaType * * @param collectionClass * @param elementClasses * @return */ public static JavaType getObjectiveJavaType(Class<?> collectionClass, Class<?>... elementClasses) { return objectMapper.getTypeFactory() .constructParametricType(collectionClass, elementClasses); } }
这篇关于Jackson工具类的文章就介绍到这儿,希望我们推荐的文章对大家有所帮助,也希望大家多多支持为之网!
- 2024-05-15PingCAP 黄东旭参与 CCF 秀湖会议,共探开源教育未来
- 2024-05-13PingCAP 戴涛:构建面向未来的金融核心系统
- 2024-05-09flutter3.x_macos桌面os实战
- 2024-05-09Rust中的并发性:Sync 和 Send Traits
- 2024-05-08使用Ollama和OpenWebUI在CPU上玩转Meta Llama3-8B
- 2024-05-08完工标准(DoD)与验收条件(AC)究竟有什么不同?
- 2024-05-084万 star 的 NocoDB 在 sealos 上一键起,轻松把数据库编程智能表格
- 2024-05-08Mac 版Stable Diffusion WebUI的安装
- 2024-05-08解锁CodeGeeX智能问答中3项独有的隐藏技能
- 2024-05-08RAG算法优化+新增代码仓库支持,CodeGeeX的@repo功能效果提升