不通过修改代码可以调用不同方法的三种方式

  String path = JsoupDemo1.class.getClassLoader().getResource("com/mujiachao/xml/dtd/student.xml").getPath();
        Document document = Jsoup.parse(new File(path), "utf-8");
        Elements name = document.getElementsByTag("name");
        for (Element element : name) {
            System.out.println(element.text());
        }

package com.mujiachao;

import com.mujiachao.fanshe.Demo5;
import com.mujiachao.xml.jsoup.JsoupDemo1;
import com.mujiachao.zhujie.MyZhuJie2;
import org.jsoup.Jsoup;
import org.jsoup.nodes.Document;
import org.jsoup.nodes.Element;
import org.jsoup.select.Elements;

import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.Properties;
@MyZhuJie2(classname = "com.mujiachao.fanshe.Monkey",pathname = "climb")
public class sanzhongfangshi {
    public static void main(String[] args) throws IOException, ClassNotFoundException, IllegalAccessException, InstantiationException, NoSuchMethodException, InvocationTargetException {
        //第一种  通过配置文件
        Properties properties = new Properties();
        ClassLoader classLoader = Demo5.class.getClassLoader();
        InputStream resourceAsStream = classLoader.getResourceAsStream("com/mujiachao/pro.properties");
        properties.load(resourceAsStream);
        String className = properties.getProperty("className");
        String methodName = properties.getProperty("methodName");
        Class aClass = Class.forName(className);
        Object o = aClass.newInstance();
        Method method = aClass.getMethod(methodName);
        method.invoke(o);
        //第二种通过反射
        MyZhuJie2 annotation = sanzhongfangshi.class.getAnnotation(MyZhuJie2.class);
        String classname = annotation.classname();
        String pathname = annotation.pathname();
        Class aClass1 = Class.forName(className);
        Object o1 = aClass1.newInstance();
        Method method1 = aClass.getMethod(methodName);
        method1.invoke(o1);
        //第三种通过xml jsoup解析器
        String path = JsoupDemo1.class.getClassLoader().getResource("com/mujiachao/xml/dtd/student.xml").getPath();
        Document document = Jsoup.parse(new File(path), "utf-8");
        Elements name = document.getElementsByTag("name");
        for (Element element : name) {
            System.out.println(element.text());
        }
    }
}