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Java SE practice - to resolve dom4j, reflected Exercises
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Preface: for dom4j, reflecting the use of a comprehensive exercise.
First, write an XML file
<?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>
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Second, the import jar package
under the new project lib folder, copy dom4j jar package to resolve the path, right-click on the jar package BuildPath-> Add to buildpath
Third, code implementation
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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