对日期的序列化:
一种方法是通过注解
Java代码
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@JSONField (format= "yyyy-MM-dd HH:mm:ss" ) public Date birthday; |
另一种是通过SerializeConfig:
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private static SerializeConfig mapping = new SerializeConfig(); private static String dateFormat; static { dateFormat = "yyyy-MM-dd HH:mm:ss" ; mapping.put(Date. class , new SimpleDateFormatSerializer(dateFormat)); } |
json字符串中使用单引号:
String text = JSON.toJSONString(object, SerializerFeature.UseSingleQuotes);
字段显示不同的key:
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public class User { @JSONField (name= "ID" ) public int getId() { ... } } User user = ...; JSON.toJSONString(user); // {"ID":001} |
自定义序列化代码示例:
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public class JsonUtil { private static SerializeConfig mapping = new SerializeConfig(); private static String dateFormat; static { dateFormat = "yyyy-MM-dd HH:mm:ss" ; } /** * 默认的处理时间 * * @param jsonText * @return */ public static String toJSON(Object jsonText) { return JSON.toJSONString(jsonText, SerializerFeature.WriteDateUseDateFormat); } /** * 自定义时间格式 * * @param jsonText * @return */ public static String toJSON(String dateFormat, String jsonText) { mapping.put(Date. class , new SimpleDateFormatSerializer(dateFormat)); return JSON.toJSONString(jsonText, mapping); } } |
自定义反序列化示例:
先自定义一个日期解析类:
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public class MyDateFormatDeserializer extends DateFormatDeserializer { private String myFormat; public MyDateFormatDeserializer(String myFormat) { super (); this .myFormat = myFormat; } @Override protected <Date> Date cast(DefaultJSONParser parser, Type clazz, Object fieldName, Object val) { if (myFormat == null ) { return null ; } if (val instanceof String) { String strVal = (String) val; if (strVal.length() == 0 ) { return null ; } try { return (Date) new SimpleDateFormat(myFormat).parse((String)val); } catch (ParseException e) { throw new JSONException( "parse error" ); } } throw new JSONException( "parse error" ); } }
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