java 如何查看对象占内存大小

参考文档：

Java问题诊断和排查工具（查看JVM参数、内存使用情况及分析） | 二哥的Java进阶之路

https://www.cnblogs.com/vickwv/p/14978283.html

引用第三方类库

<dependency>
                <groupId>org.apache.lucene</groupId>
                <artifactId>lucene-core</artifactId>
                <version>4.0.0</version>
            </dependency>

System.out.println("orcSaveDto:" + orcSaveDto);
System.out.println("orcSaveDto size is " + RamUsageEstimator.shallowSizeOf(orcSaveDto));
System.out.println("orcSaveDto size is 1: " + RamUsageEstimator.humanReadableUnits(RamUsageEstimator.sizeOfObject(orcSaveDto)));
System.out.println("orcSaveDto size is 2: " + RamUsageEstimator.sizeOfObject(orcSaveDto));

如何计算一个对象的大小_ramusageestimator.humansizeof_小百菜的博客-CSDN博客