package com.iailab.framework.common.util.json.databind; import com.fasterxml.jackson.core.JsonGenerator; import com.fasterxml.jackson.databind.SerializerProvider; import com.fasterxml.jackson.databind.annotation.JacksonStdImpl; import java.io.IOException; /** * Long 序列化规则 * * 会将超长 long 值转换为 string,解决前端 JavaScript 最大安全整数是 2^53-1 的问题 * * @author 星语 */ @JacksonStdImpl public class NumberSerializer extends com.fasterxml.jackson.databind.ser.std.NumberSerializer { private static final long MAX_SAFE_INTEGER = 9007199254740991L; private static final long MIN_SAFE_INTEGER = -9007199254740991L; public static final NumberSerializer INSTANCE = new NumberSerializer(Number.class); public NumberSerializer(Class rawType) { super(rawType); } @Override public void serialize(Number value, JsonGenerator gen, SerializerProvider serializers) throws IOException { // 超出范围 序列化位字符串 if (value.longValue() > MIN_SAFE_INTEGER && value.longValue() < MAX_SAFE_INTEGER) { super.serialize(value, gen, serializers); } else { gen.writeString(value.toString()); } } }