问题
I cannot import JSONObject, I thought this was something that came with java and an external jar is not needed, why is it saying it cannot find it?
回答1:
I thought this was something that came with java and an external jar is not needed
No - JsonObject is only in JavaEE. JSONObject isn't included in JavaSE, it needs an external library. You can find it on github. However, if you use JavaEE, it is included.
If you are using gradle, add the following to your build.gradle file (available in maven central):
dependencies {
compile "org.json:json:20171018"
}
回答2:
You need to use the following library in Java SE: https://jsonp.java.net/
The JSR 353: Java API for JSON Processing is only in Java EE by default, not in Java SE.
来源：https://stackoverflow.com/questions/26439675/jsonobject-cannot-be-resolved-to-a-type