过了一个节回来Android Studio项目运行又编译不过了，报如下错误：
Unable to load class 'javax.xml.bind.JAXBException'
This is an unexpected error. Please file a bug containing the idea.log file
解决方法：
修改项目下的build.gradle版本号，将gradle版本升级到4.x.x
dependencies {
classpath 'com.android.tools.build:gradle:4.2.1'
// NOTE: Do not place your application dependencies here; they belong
// in the individual module build.gradle files
}
