使用 google gson 转换Timestamp或Date类型为JSON字符串.

转http://joesmart.iteye.com/blog/564633

gson lib 包为1.4版本.

创建类型适配类:

Timestamp类型适配类代码

import java.lang.reflect.Type;

import java.sql.Timestamp;

import java.text.DateFormat;

import java.text.ParseException;

import java.text.SimpleDateFormat;

import java.util.Date;

import com.google.gson.JsonDeserializationContext;

import com.google.gson.JsonDeserializer;

import com.google.gson.JsonElement;

import com.google.gson.JsonParseException;

import com.google.gson.JsonPrimitive;

import com.google.gson.JsonSerializationContext;

import com.google.gson.JsonSerializer;

public class TimestampTypeAdapter implements JsonSerializer<Timestamp>, JsonDeserializer<Timestamp>{

private final DateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");

public JsonElement serialize(Timestamp src, Type arg1, JsonSerializationContext arg2) {

String dateFormatAsString = format.format(new Date(src.getTime()));

return new JsonPrimitive(dateFormatAsString);

}

public Timestamp deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context) throws JsonParseException {

if (!(json instanceof JsonPrimitive)) {

throw new JsonParseException("The date should be a string value");

}

try {

Date date = format.parse(json.getAsString());

return new Timestamp(date.getTime());

} catch (ParseException e) {

throw new JsonParseException(e);

}

}

}

类型适配类
应用类型适配器 写道
Gson gson = new GsonBuilder().registerTypeAdapter(Timestamp.class,new TimestampTypeAdapter()).setDateFormat("yyyy-MM-dd HH:mm:ss").create();

String jsonString = gson.toJson(resourceInfo,ResourceGeoInfo.class);

输出结果
{"positionTime":"2010-01-07 10:57:27"}

Date 类型的时间转换第二种方式;
Gson gson = new GsonBuilder().setDateFormat("yyyy-MM-dd HH:mm:ss").create();

String jsonString = gson.toJson(new Date(System.currentTimeMillis()),Date.class);

System.out.println(jsonString);

输出结果:

"2010-01-07 12:24:34"