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Fastjson Feathure

时间:2015-06-09 17:00:36      阅读:836      评论:0      收藏:0      [点我收藏+]

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转载于:http://code.alibabatech.com/wiki/display/FastJSON/Serial+Features

Fastjson序列化时,可以指定序列化的特性,以满足不同的序列化需求。

SerialFeature类的定义

package com.alibaba.fastjson.serializer;
 
public enum SerializerFeature {
    QuoteFieldNames, UseSingleQuotes, WriteMapNullValue, WriteEnumUsingToString, UseISO8601DateFormat, SkipTransientField
}

使用举例

Date date = new Date(1308841916550L);
 
// 缺省输出
System.out.println(JSON.toJSONString(date)); // 1308841916550
 
// 使用特性 UseISO8601DateFormat
// "2011-06-23T23:11:56.550"
System.out.println(JSON.toJSONString(date, SerializerFeature.UseISO8601DateFormat));
 
// 组合两个Feature(UseISO8601DateFormat和UseSingleQuotes)输出日期
SerializerFeature[] features = {SerializerFeature.UseISO8601DateFormat, SerializerFeature.UseSingleQuotes };
System.out.println(JSON.toJSONString(date, features)); // ‘2011-06-23T23:11:56.550‘

详细说明表格

Featurs缺省值说明
QuoteFieldNames true 序列化输出字段,使用引号。例如:
QuoteFieldNames Feature Enabled:
{"id":123, "name":"张三", "age":23}

QuoteFieldNames Feature Disabled:

{id:123, name:"张三", age:23}
UseSingleQuotes false 使用单引号而不是双引号
UseSingleQuotes Feature Enabled:
{‘id‘:123, ‘name‘:‘张三‘, ‘age‘:23}

UseSingleQuotes Feature Disabled:

{"id":123, "name":"张三", "age":23}
WriteMapNullValue false 空值是否输出。大多数情况,值为null的属性输出是没有意义的,缺省这个特性是打开的。
WriteMapNullValue Feature Enabled:
{‘id‘:123, ‘name‘:‘张三‘, ‘age‘:23, birthday : null}

WriteMapNullValue Feature Disabled:

{"id":123, "name":"张三", "age":23}
WriteEnumUsingToString false Enum输出name()或者original
public static enum Type {
    Big, Medium, Small
}
 
System.out.println(JSON.toJSONString(Type.Big)); // 0
System.out.println(JSON.toJSONString(Type.Medium)); // 1
System.out.println(JSON.toJSONString(Type.Small)); // 2
 
System.out.println(JSON.toJSONString(Type.Big, SerializerFeature.WriteEnumUsingToString)); // "Big"
System.out.println(JSON.toJSONString(Type.Medium, SerializerFeature.WriteEnumUsingToString)); // "Medium"
System.out.println(JSON.toJSONString(Type.Small, SerializerFeature.WriteEnumUsingToString)); // "Small"
UseISO8601DateFormat false Date使用ISO8601格式输出
Date date = new Date(1308841916550L);
System.out.println(JSON.toJSONString(date)); // 1308841916550
 
// "2011-06-23T23:11:56.550"
System.out.println(JSON.toJSONString(date, SerializerFeature.UseISO8601DateFormat));
SkipTransientField true 如果是true,类中的Get方法对应的Field是transient,序列化时将会被忽略
WriteNullListAsEmpty false list字段如果为null,输出为[],而不是null
WriteNullNumberAsZero false 数值字段如果为null,输出为0,而不是null
WriteNullBooleanAsFalse false Boolean字段如果为null,输出为false,而不是null
WriteNullStringAsEmpty false 字符类型字段如果为null,输出为"",而不是null
SortField false 按字段名称排序后输出
WriteTabAsSpecial false 把\t做转义输出。
 

Fastjson Feathure

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原文地址:http://www.cnblogs.com/exmyth/p/4563741.html

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