Java SE练习

本文链接：https://blog.csdn.net/m0_37602117/article/details/78791742

前言：对dom4j、反射使用的一个综合练习。

一、编写XML文件

<?xml version="1.0" encoding="UTF-8"?>
<beans>
    <student className="cn.itcast.javaeevideoday02.Student">
        <name>张三</name>
        <age>18</age>
        <sex>男</sex>
    </student>
    <student className="cn.itcast.javaeevideoday02.Student">
        <name>李四</name>
        <age>20</age>
        <sex>男</sex>
    </student>
    <student className="cn.itcast.javaeevideoday02.Student">
        <name>王五</name>
        <age>22</age>
        <sex>男</sex>
    </student>
</beans>1
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二、导入jar包
在项目下新建lib文件夹，将dom4j解析jar包复制到该路径，点击jar包右键BuildPath–>Add to buildpath

三、代码实现

package cn.itcast.javaeevideoday02;

import java.lang.reflect.Array;
import java.lang.reflect.Constructor;
import java.util.ArrayList;
import java.util.List;

import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.Element;
import org.dom4j.io.SAXReader;

/**
 * 
 * @author 大家都说名字长不会被发现
 *
 */
public class SynthesisDemo {
    public static void main(String[] args) throws Exception {

        //创建SAXReader对象
        SAXReader reader = new SAXReader();
        //读取XML文件
        Document document = reader.read("bean.xml");

        //获取文件跟标签
        Element rootElement = document.getRootElement();

        //获取根标签下指定的所有子标签
        List<Element> elements = rootElement.elements();

        //创建集合对象
        ArrayList<Student> stuLists = new ArrayList<>();

        for (Element element : elements) {
            //获取标签属性值
            String className = element.attributeValue("className");
            //获取子标签文本
            String name = element.elementText("name");
            String age = element.elementText("age");
            String sex = element.elementText("sex");

            //获取字节码文件对象
            Class c = Class.forName(className);

            //获取对象满参构造
            Constructor constructor = c.getConstructor(String.class,int.class,String.class);
            Object student = constructor.newInstance(name,Integer.valueOf(age),sex);

            stuLists.add((Student)student);
        }
        System.out.println(stuLists);
    }
}
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Java SE练习 - 对dom4j解析、反射的综合练习