Map构造器模式 map builder pattern

<dependency>
    <groupId>com.google.guava</groupId>
    <artifactId>guava</artifactId>
    <version>20.0</version>
</dependency>

   ImmutableMap<String,Object> jsonObject = ImmutableMap.<String,Object>builder()
                .put("duration",duration)
                .put("uuid",uuid)
                .put("meta",MediaService.toJsonObject(meta))
                .build();