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3 years ago
134 changed files with 77 additions and 583 deletions
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package com.bnyer.img.config; |
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import com.bnyer.img.serializer.LongToStringSerializer; |
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import com.fasterxml.jackson.databind.DeserializationFeature; |
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import com.fasterxml.jackson.databind.ObjectMapper; |
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import com.fasterxml.jackson.databind.module.SimpleModule; |
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import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean; |
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import org.springframework.context.annotation.Bean; |
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import org.springframework.context.annotation.Configuration; |
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import org.springframework.context.annotation.Primary; |
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import org.springframework.http.converter.json.Jackson2ObjectMapperBuilder; |
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/** |
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* 解决雪花Id长度超过16位前端传入精度丢失的问题 |
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*/ |
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@Configuration |
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public class JsonConfig { |
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@Bean |
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@Primary |
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@ConditionalOnMissingBean(ObjectMapper.class) |
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public ObjectMapper jacksonObjectMapper(Jackson2ObjectMapperBuilder builder) |
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{ |
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ObjectMapper objectMapper = builder.createXmlMapper(false).build(); |
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// 全局配置序列化返回 JSON 处理
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SimpleModule simpleModule = new SimpleModule(); |
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//JSON Long ==> String
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//自定义字符串转化规则ToStringSerializer换成自定义的LongToStringSerializer
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simpleModule.addSerializer(Long.class, LongToStringSerializer.instance); |
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simpleModule.addSerializer(Long.TYPE, LongToStringSerializer.instance); |
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objectMapper.registerModule(simpleModule); |
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//参数在bean中没有的情况处理
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objectMapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false); |
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return objectMapper; |
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} |
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} |
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package com.bnyer.img.serializer; |
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import com.fasterxml.jackson.core.JsonGenerator; |
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import com.fasterxml.jackson.databind.JsonSerializer; |
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import com.fasterxml.jackson.databind.SerializerProvider; |
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import java.io.IOException; |
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public class LongToStringSerializer extends JsonSerializer<Long> { |
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public static final LongToStringSerializer instance = new LongToStringSerializer(); |
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@Override |
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public void serialize(Long id, JsonGenerator jsonGenerator, SerializerProvider serializerProvider) throws IOException { |
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if(id != null){ |
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//长度小于某个值的，还是保持long类型
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if(id < 10000000000000000L){ |
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jsonGenerator.writeNumber(id); |
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}else { |
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//长度超过某个值的，转化为字符串
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jsonGenerator.writeString(id.toString()); |
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} |
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} |
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} |
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} |
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