java.lang.NoSuchMethodException: com.ruoyi.web.controller.test.bean.HeadTeacher

软件开发过程中使用Java反射机制时遇到了下面的问题

com.ruoyi.web.controller.test.bean.HeadTeacher@4b9af9a9
com.ruoyi.web.controller.test.bean.HeadTeacher@4b9af9a9
java.lang.NoSuchMethodException: com.ruoyi.web.controller.test.bean.HeadTeacher.<init>(java.lang.String, int)
   at java.lang.Class.getConstructor0(Class.java:3082)
   at java.lang.Class.getConstructor(Class.java:1825)
   at com.ruoyi.web.controller.test.ReflectionDemo.getInstance(ReflectionDemo.java:49)
   at com.ruoyi.web.controller.test.ReflectionDemo.main(ReflectionDemo.java:69)

代码如下：

package com.ruoyi.web.controller.test;import com.ruoyi.web.controller.test.bean.HeadTeacher;
import com.ruoyi.web.controller.test.bean.Student;
public class ReflectionDemo {/*** @param className* @param params     代表参数的值* @param paramsType 代表构造器参数的类型* @return*/public Object getInstance(String className, Object[] params, Class[] paramsType) {Object obj = null;Class clazz = null;try {//获取className字符串所代表的类的Class实例clazz = Class.forName(className);//使用clazz获取className所代表的类的构造器，然后使用newInstance方法获取这个类的实例obj = clazz.getConstructor(paramsType).newInstance(params);} catch (Exception e) {e.printStackTrace();}return obj;}public static void main(String[] args) {ReflectionDemo demo = new ReflectionDemo();/*** 测试带参数的方法*/Object obj = demo.getInstance("com.ruoyi.web.controller.test.bean.HeadTeacher",new Object[]{"王校长",50},new Class[]{String.class,Integer.TYPE});HeadTeacher ht = new HeadTeacher();System.out.println(ht);ht.setHtName("王本山");ht.setHtAge(48);System.out.println(ht);}
}

JavaBean对象代码：

package com.ruoyi.web.controller.test.bean;public class HeadTeacher {private String htName;private int htAge;public String getHtName() {return htName;}public void setHtName(String htName) {this.htName = htName;}public int getHtAge() {return htAge;}public void setHtAge(int htAge) {this.htAge = htAge;}public void sayHello() {System.out.println(this.htName + "\t" + this.htAge);}
}

反复分析给出的错误提示，发现实例化HeadTeacher对象时，该类中并不存在带参构造器，因此

bean对象中添加如下代码

public HeadTeacher(String name,int age){

this.htName= name;

this.htAge = age;

}