自定义Jackson序列化 @JsonSerialize

秒速五厘米 2022-05-08 12:52 442阅读 0赞

自定义json序列化需要实现StdSerializer<T>或者JsonSerializer<T>。

我要序列化House这个类，加上注解，指定用于序列化的类

package com.xhx.json.entity;
    
    import com.fasterxml.jackson.annotation.JsonFormat;
    import com.fasterxml.jackson.databind.annotation.JsonSerialize;
    import com.xhx.json.serializers.HourseSerializer;
    
    import java.util.Date;
    
    @JsonSerialize(using = HourseSerializer.class)
    public class Hourse {
        private String location;
        private Date buildDate;
    
        public String getLocation() {
            return location;
        }
    
        public void setLocation(String location) {
            this.location = location;
        }
    
        public Date getBuildDate() {
            return buildDate;
        }
    
        public void setBuildDate(Date buildDate) {
            this.buildDate = buildDate;
        }
    }

package com.xhx.json.serializers;
    
    import com.fasterxml.jackson.core.JsonGenerator;
    import com.fasterxml.jackson.databind.SerializerProvider;
    import com.fasterxml.jackson.databind.ser.std.StdSerializer;
    import com.xhx.json.entity.Hourse;
    
    import java.io.IOException;
    
    public class HourseSerializer extends StdSerializer<Hourse> {
    
        public HourseSerializer(){
            super(Hourse.class);
        }
    
        protected HourseSerializer(Class<Hourse> t) {
            super(t);
        }
    
        @Override
        public void serialize(Hourse hourse, JsonGenerator generator, SerializerProvider provider) throws IOException {
            generator.writeStartObject();
            generator.writeFieldName("id");
            generator.writeString("自定义");
            generator.writeFieldName("location");
            generator.writeString(hourse.getLocation());
            generator.writeObjectField("buildDate",hourse.getBuildDate());
            generator.writeEndObject();
        }
    }

测试：

![70][]

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[70]: /images/20220508/724c31151e7b45ff8450d88ab8452992.png
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