1 /**
2 * Created by hunt on 2017/6/27.
3 * 测试的实体类
4 * @Data 编译后会自动生成set、get、无惨构造、equals、canEqual、hashCode、toString方法
5 */
6 @Data
7 public class Person {
8 private String name;
9 private int age;
10 public Person(String name){
11 this.name = name;
12 }
13 public Person(int age){
14 this.age = age;
15 }
16 public Person(String name,int age){...}
17
18 }
1 import java.lang.reflect.Constructor;
2
3 /**
4 * Created by hunt on 2017/6/27.
5 */
6 public class NewInstanceTest {
7 public static void main(String[] args) {
8 Class<Person> personClass = Person.class;
9 try {
10 Constructor<?> constructor = personClass.getConstructor(java.lang.String.class);
11 Person p = (Person) constructor.newInstance("hunt");
12 System.out.println(p);
13 } catch (Exception e) {
14 e.printStackTrace();
15 }
16 }
17 }
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。