1.maven 导入
<!-- https://mvnrepository.com/artifact/com.carrotsearch/java-sizeof -->
<dependency>
<groupId>com.carrotsearch</groupId>
<artifactId>java-sizeof</artifactId>
<version>0.0.5</version>
</dependency>
2.
BigDecimal b =BigDecimal.valueOf( RamUsageEstimator.sizeOf("要测量的对象"));
BigDecimal divide = b.divide(BigDecimal.valueOf(1024 * 1024));
log.info("DrivingController 数据大小:{} M", divide.toString());
3. 结果:
###|2022-05-10 00:02:02.776|http-nio-8089-exec-3|INFO|-|-|-|ac30e9740fd142a587efeb306e162151.236.16521121208490001|***|TestController--->数据大小:3.01990509033203125 M