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;
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另一种是通过SerializeConfig:
Java代码
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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}
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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:
Java代码
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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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