Gson转换时,Double转式化

package com.mall.core;

import java.lang.reflect.Type;
import java.text.DecimalFormat;

import com.google.gson.JsonElement;
import com.google.gson.JsonPrimitive;
import com.google.gson.JsonSerializationContext;
import com.google.gson.JsonSerializer;

/**
 * Gson转换时,Double转式化
 * 14  *
 */
public class JsonDoubleSerializer implements JsonSerializer<Double> {
    
    private String doublePattern;
    
    public JsonDoubleSerializer(String doublePattern) {
        this.doublePattern = doublePattern;
    }
        
    public JsonElement serialize(Double arg0, Type arg1,
            JsonSerializationContext arg2) {
        return new JsonPrimitive(new DecimalFormat(doublePattern).format(arg0));
    }
}