import java.util.Properties
import java.io.FileInputStream
//test.properties 里的内容为"ddd=5.6,1.2"
def loadProperties():Unit = {
val properties = new Properties()
val path = Thread.currentThread().getContextClassLoader.getResource("test.properties").getPath //文件要放到resource文件夹下
properties.load(new FileInputStream(path))
println(properties.getProperty("ddd"))//读取键为ddd的数据的值
println(properties.getProperty("ddd","没有值"))//如果ddd不存在,则返回第二个参数
properties.setProperty("ddd","123")//添加或修改属性值
}
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