Reflections

给我写信
GitHub

Java

1. 从string创建实例

下面用scala的代码来举例

package cn.gridx.scala.lang.reflections
/**
  * Created by tao on 1/4/17.
  * 利用反射创建一个cn.gridx.scala.lang.reflections.A实例
  * 并且创建时传入构造的参数
  * A是base的子类
  */
object NewInstance {
  def main(args: Array[String]): Unit = {
    val clz = Class.forName("cn.gridx.scala.lang.reflections.A")
    val con = clz.getConstructor(classOf[Map[String, String]])
    val obj = con.newInstance(Map("1" -> "100", "2" -> "200")).asInstanceOf[Base]
    obj.show()
  }
}
trait Base {
  def show(): Unit = ???
}
class A(attribute: Map[String, String]) extends Base {
  override
  def show(): Unit = {
    println(s"A: attribute = $attribute")
  }
}