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
  *   *
  */
 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));
     }
 }