Gson转换时,Double转式化

 1 package com.mall.core;
 2 
 3 import java.lang.reflect.Type;
 4 import java.text.DecimalFormat;
 5 
 6 import com.google.gson.JsonElement;
 7 import com.google.gson.JsonPrimitive;
 8 import com.google.gson.JsonSerializationContext;
 9 import com.google.gson.JsonSerializer;
10 
11 /**
12  * Gson转换时,Double转式化
13  * 14  *
15  */
16 public class JsonDoubleSerializer implements JsonSerializer<Double> {
17     
18     private String doublePattern;
19     
20     public JsonDoubleSerializer(String doublePattern) {
21         this.doublePattern = doublePattern;
22     }
23         
24     public JsonElement serialize(Double arg0, Type arg1,
25             JsonSerializationContext arg2) {
26         return new JsonPrimitive(new DecimalFormat(doublePattern).format(arg0));
27     }
28 }