Java：打印出用于调试的对象
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Java: Printing out an object for debugging
提问by Muhd
I would like an easy way to print out a java object, or to say it another way, serialize an object as a string. I would like to see the values of all variables contained within the object, and if there are more objects (like a list or whatever) it should print out the stuff in that object as well. Basically, it would be something like JSON encoding, but JSON doesn't support infinity, and I need to see if there is infinity or NaN in one of the double or float values.
我想要一种简单的方法来打印出一个 java 对象，或者换句话说，将一个对象序列化为一个字符串。我想查看对象中包含的所有变量的值，如果有更多对象（如列表或其他），它也应该打印出该对象中的内容。基本上，它类似于 JSON 编码，但 JSON 不支持无穷大，我需要查看 double 或 float 值之一中是否存在无穷大或 NaN。
How can I do this?
我怎样才能做到这一点？
回答by Daniel DiPaolo
You could use Gsonto serialize to JSON as it now supports NaN and +/- infinity
您可以使用Gson序列化为 JSON，因为它现在支持 NaN 和 +/- 无穷大
回答by lobster1234
More often than not ToStringBuilder.reflectionToString(Object)works great. It wont work when doing Maps though.
通常ToStringBuilder.reflectionToString(Object)效果很好。但是在做地图时它不会工作。
