使用BASE64压缩byte[]到GSON

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/* * GOSN常用类 * To change this template, choose Tools | Templates * and open the template in the editor. */package cn.brtx.carsharing.tools;import com.google.gson.Gson;import com.google.gson.GsonBuilder;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;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 android.util.Base64;/** *toJson的相关方法 * @author Administrator */public class GSONTOOLS {    /**     * 获取GSON转换模式，默认日期格式为“yyyy-MM-dd HH:mm:ss”     * @return     */    public static Gson getGson() {        GsonBuilder builder = new GsonBuilder();        // 不转换没有 @Expose 注解的字段        builder.excludeFieldsWithoutExposeAnnotation();        builder.registerTypeAdapter(Timestamp.class, new TimestampTypeAdapter()).setDateFormat("yyyy-MM-dd HH:mm:ss").create();        builder.registerTypeHierarchyAdapter(byte[].class, new ByteArrayTypeAdapter()).create();        Gson gson = builder.create();        return gson;    }    /**     * 获取GSON转换模式，设置时间格式为dataFat     * @param dataFat 时间格式     * @return     */    public static Gson getGson(String dataFat) {        GsonBuilder builder = new GsonBuilder();        // 不转换没有 @Expose 注解的字段        builder.excludeFieldsWithoutExposeAnnotation();        builder.registerTypeAdapter(Timestamp.class, new TimestampTypeAdapter()).setDateFormat(dataFat).create();        builder.registerTypeHierarchyAdapter(byte[].class, new ByteArrayTypeAdapter()).create();        Gson gson = builder.create();        return gson;    }}/** * json包含日期类型的时候的处理方法 * @author Administrator */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);        }    }}class ByteArrayTypeAdapter implements JsonSerializer<byte[]>, JsonDeserializer<byte[]> {    public JsonElement serialize(byte[] src, Type typeOfSrc, JsonSerializationContext context) {        String base64 = Base64.encodeToString(src, 0, src.length,       Base64.DEFAULT);               return new JsonPrimitive(base64);    }    public byte[] deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context) throws JsonParseException {        if (!(json instanceof JsonPrimitive)) {            throw new JsonParseException("The date should be a string value");        }        try {            byte[] base64 = Base64.decode(json.getAsString(), Base64.DEFAULT);            return base64;        } catch (Exception ex) {        }        return null;    }}