jackson进行json序列化和反序列化

最新推荐文章于 2024-03-15 23:22:49 发布

原创最新推荐文章于 2024-03-15 23:22:49 发布 · 341 阅读

0 ·

CC 4.0 BY-SA版权

本文介绍了一个基于Jackson库的工具类实现，该工具类提供了一系列用于JSON序列化和反序列化的便捷方法。通过实例展示了如何将Java对象转换为JSON字符串及如何从JSON字符串中读取Java对象。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

package com.csair.soc.aircrew.rostereditor.util;

import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.core.type.TypeReference;
import com.fasterxml.jackson.databind.DeserializationFeature;
import com.fasterxml.jackson.databind.ObjectMapper;

public abstract class JacksonUtil {
public static final ObjectMapper OM = new ObjectMapper();
static{
OM.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
}
public static <T> T getData(byte[] o) {
T data = null;
try {
data = OM.readValue((byte[]) o, new TypeReference<T>(){});
} catch (Exception e) {
e.printStackTrace();
}
return data;
}

public static <T> T getData(byte[] o,TypeReference<T> typeReference) {
T data = null;
try {
data = OM.readValue((byte[]) o, typeReference);
} catch (Exception e) {
e.printStackTrace();
}
return data;
}
public static byte[] toBytes(Object mb) {
byte[] bytes = null;
try {
bytes = OM.writeValueAsBytes(mb);
} catch (JsonProcessingException e) {
e.printStackTrace();
}
return bytes;
}
public static String toString(Object mb) {
String bytes = null;
try {
bytes = OM.writeValueAsString(mb);
} catch (JsonProcessingException e) {
e.printStackTrace();
}
return bytes;
}
public static <T> T getData(String jsonStr,TypeReference<T> typeReference) {
T data = null;
try {
data = OM.readValue(jsonStr, typeReference);
} catch (Exception e) {
e.printStackTrace();
}
return data;
}

}

jackson的pom依赖配置如下

<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>2.6.4</version>
</dependency>

user是个实体，进行json序列化

String str = JacksonUtil.toString(user);
System.out.println(str);

从json字符串反序列化获取实体

user = JacksonUtil.getData(str, new TypeReference<User>() {
});