java中string类型转换成map

时间:2021-09-02 16:19:56

背景:有时候string类型的数据取出来是个很标准的key、value形式,通过Gson的可以直接转成map

使用方式:

     Gson gson = new Gson();
Map<String, Object> map = new HashMap<String, Object>();
map = gson.fromJson(jsonString, map.getClass());#关键
String goodsid=(String) map.get("goods_id");
System.out.println("map的值为:"+goodsid);

jsong数据为:

{"goods_id":"140861765","cat_id":"210","goods_sn":"171073501","goods_sn_back":"171073501","goods_upc":null,"goods_name":"Lace-Up Boxer Swimming Trunks"}

是个很标准的key,value形式,转换后,在使用map分得到key,打印的map为

java中string类型转换成map

Gson的另外一种写法

    public static Map<String, Object> json2map(String str_json) {
Map<String, Object> res = null;
try {
Gson gson = new Gson();
res = gson.fromJson(str_json, new TypeToken<Map<String, Object>>() {
}.getType());
} catch (JsonSyntaxException e) {
}
return res;
}

gson在mavent的配置

    <!-- 配置gson -->
<dependency>
<groupId>com.google.code.gson</groupId>
<artifactId>gson</artifactId>
<version>2.2.4</version>
</dependency>