Java reflection, get the method in the class according to the method name

package com.test.classobject;

import java.io.IOException;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;


import com.test.pojo.Student;

/**
 * Servlet implementation class TestServlet4
 */
@WebServlet("/TestServlet4")
public class TestServlet4 extends HttpServlet {
    
    
	private static final long serialVersionUID = 1L;
       
    /**
     * @see HttpServlet#HttpServlet()
     */
    public TestServlet4() {
    
    
        super();
        // TODO Auto-generated constructor stub
    }

	/**
	 * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
	 */
	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
    
    
		// TODO Auto-generated method stub
		//response.getWriter().append("Served at: ").append(request.getContextPath());
	
		Class clazz=Student.class;
		
		Student student=new Student();
		
		try {
    
    
		
			//通过反射 获得指定的方法
			Method method= clazz.getDeclaredMethod("test", String.class,int.class);
		    //调用改方法
			method.invoke(student, "zhangsan",23);
			
			Method method2=clazz.getDeclaredMethod("test", int.class);
			
			Object o=method2.invoke(student, 25);
			
			System.out.println(o.toString());
			
			
			
		
		} catch (NoSuchMethodException | SecurityException e) {
    
    
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (IllegalAccessException e) {
    
    
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (IllegalArgumentException e) {
    
    
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (InvocationTargetException e) {
    
    
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	
		
	}

	/**
	 * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
	 */
	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
    
    
		// TODO Auto-generated method stub
		doGet(request, response);
	}

}