通过构造函数实例化对象的方法
时间：2021-10-03 17:01:46 | 栏目：JavaScript代码 | 点击：次
如下所示：
/**
* Created by hunt on 2017/6/27.
* 测试的实体类
* @Data 编译后会自动生成set、get、无惨构造、equals、canEqual、hashCode、toString方法
*/
@Data
public class Person {
private String name;
private int age;
public Person(String name){
this.name = name;
}
public Person(int age){
this.age = age;
}
public Person(String name,int age){...}
}
import java.lang.reflect.Constructor;
/**
* Created by hunt on 2017/6/27.
*/
public class NewInstanceTest {
public static void main(String[] args) {
Class<Person> personClass = Person.class;
try {
Constructor<?> constructor = personClass.getConstructor(java.lang.String.class);
Person p = (Person) constructor.newInstance("hunt");
System.out.println(p);
} catch (Exception e) {
e.printStackTrace();
}
}
}
总结：通过class.getConstructor(parameterTypes)获得对应的构造器，然后通过constructor.newInstance(parameterTypes)实例化对象。