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feilong is a suite of core and expanded libraries that include utility classes, http, excel,cvs, io classes, and much much more.
/*
* Copyright (C) 2008 feilong
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.feilong.json.processor;
import static com.feilong.core.DatePattern.COMMON_DATE_AND_TIME;
import java.util.Date;
import com.feilong.core.date.DateUtil;
import com.feilong.lib.json.JsonConfig;
import com.feilong.lib.json.processors.JsonValueProcessor;
/**
* 时间转换日期值处理器实现.
*
*
* {@link Date}日期json value处理器.
*
*
*
* 如果不使用这个处理器,对于 Date格式输出成json,在date to json的时候,会解析Date 的每个字段属性,比如month,year,day等:
*
*
* 示例:
*
*
*
*
* User user = new User("feilong1", 24);
* user.setDate(toDate("2016-08-15 13:30:00", COMMON_DATE_AND_TIME));
*
* JavaToJsonConfig javaToJsonConfig = new JavaToJsonConfig();
* javaToJsonConfig.setIncludes("date");
*
* LOGGER.debug(JsonUtil.format(user, javaToJsonConfig));
*
*
* 返回:
*
*
* {"date": {"date": 15}}
*
*
*
* 可以看出,这个日期输出并不是我们期望看到的结果
*
*
*
*
*
* 此时,你可以使用该处理器,做自定义解析
*
*
* 示例:
*
*
*
*
* User user = new User("feilong1", 24);
* user.setDate(toDate("2016-08-15 13:30:00", COMMON_DATE_AND_TIME));
*
* Map{@code } propertyNameAndJsonValueProcessorMap = new HashMap{@code <>}();
* propertyNameAndJsonValueProcessorMap.put("date", DateJsonValueProcessor.DEFAULT_INSTANCE);
*
* JavaToJsonConfig javaToJsonConfig = new JavaToJsonConfig();
* javaToJsonConfig.setPropertyNameAndJsonValueProcessorMap(propertyNameAndJsonValueProcessorMap);
* javaToJsonConfig.setIncludes("date");
*
* LOGGER.debug(JsonUtil.format(user, javaToJsonConfig));
*
*
* 返回:
*
*
* {"date": "2016-08-15 13:30:00"}
*
*
*
*
*
* 为了简化操作,{@link com.feilong.json.builder.JsonConfigBuilder#buildDefaultJavaToJsonConfig() feilong json} 内置了
* yyyy-MM-dd HH:mm:ss
,如果你想输出成其他的日期格式,也可以使用这个类来提前渲染:
*
*
* 示例:
*
*
*
*
* 比如想转成 yyyy-MM-dd HH:mm:ss.SSS
格式:
*
*
*
* User user = new User("feilong1", 24);
* user.setDate(toDate("2016-08-15", COMMON_DATE));
*
* Map{@code } propertyNameAndJsonValueProcessorMap = new HashMap{@code <>}();
* propertyNameAndJsonValueProcessorMap.put("date", new DateJsonValueProcessor(COMMON_DATE_AND_TIME_WITH_MILLISECOND));
*
* JavaToJsonConfig javaToJsonConfig = new JavaToJsonConfig();
* javaToJsonConfig.setPropertyNameAndJsonValueProcessorMap(propertyNameAndJsonValueProcessorMap);
* javaToJsonConfig.setIncludes("date");
*
* LOGGER.debug(JsonUtil.format(user, javaToJsonConfig));
*
*
* 返回:
*
*
* {"date": "2016-08-15 00:00:00.000"}
*
*
*
*
* @author feilong
* @since 1.0.5
*/
public class DateJsonValueProcessor extends AbstractJsonValueProcessor{
/**
* 默认Singleton instance.
*
* @since 1.9.4
*/
public static final JsonValueProcessor DEFAULT_INSTANCE = new DateJsonValueProcessor(COMMON_DATE_AND_TIME);
/** The date pattern. */
private String datePattern = COMMON_DATE_AND_TIME;
//---------------------------------------------------------------
/**
* The Constructor.
*
* @param datePattern
* 你可以使用 {@link com.feilong.core.DatePattern}
*/
public DateJsonValueProcessor(String datePattern){
this.datePattern = datePattern;
}
/*
* (non-Javadoc)
*
* @see com.feilong.tools.jsonlib.processor.AbstractJsonValueProcessor#processValue(java.lang.Object, net.sf.json.JsonConfig)
*/
@Override
protected Object processValue(Object value,JsonConfig jsonConfig){
if (null == value){
return null;
}
return value instanceof Date ? DateUtil.toString((Date) value, datePattern) : value.toString();
}
}