错误:

Exception in thread "main" java.lang.UnsupportedClassVersionError: org/dom4j/DocumentException : Unsupported major.minor version 52.0

at java.lang.ClassLoader.defineClass1(Native Method)

at java.lang.ClassLoader.defineClass(Unknown Source)

at java.security.SecureClassLoader.defineClass(Unknown Source)

at java.net.URLClassLoader.defineClass(Unknown Source)

at java.net.URLClassLoader.access$100(Unknown Source)

at java.net.URLClassLoader$1.run(Unknown Source)

at java.net.URLClassLoader$1.run(Unknown Source)

at java.security.AccessController.doPrivileged(Native Method)

at java.net.URLClassLoader.findClass(Unknown Source)

at java.lang.ClassLoader.loadClass(Unknown Source)

at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)

at java.lang.ClassLoader.loadClass(Unknown Source)

at java.lang.Class.getDeclaredMethods0(Native Method)

at java.lang.Class.privateGetDeclaredMethods(Unknown Source)

at java.lang.Class.getMethod0(Unknown Source)

at java.lang.Class.getMethod(Unknown Source)

at sun.launcher.LauncherHelper.getMainMethod(Unknown Source)

at sun.launcher.LauncherHelper.checkAndLoadMain(Unknown Source)

代码：

package com.imooc.dom4j;

import java.util.List;

import org.dom4j.Document;

import org.dom4j.DocumentException;

import org.dom4j.Element;

import org.dom4j.io.SAXReader;

public class HrReader {

public void readXml(){

String file="C:/Users/Administrator/Desktop/web/xml/src/hr.xml";

//SAXReader类是读取XML文件的核心类，用于解析XML以“树”的形式保存在内存中

SAXReader reader=new SAXReader();

try {

Document document=reader.read(file);

//获取XML文档的根节点，即hr标签

Element root=document.getRootElement();

//elements方法用于获得指定的标签集合

List<Element> employees=root.elements("employee");

for(Element employee:employees){

//element方法用于获取唯一的子节点对象

Element name=employee.element("name");

//getTEXT()方法用于获取标签文本值

String empName=name.getText();

System.out.println(empName);

}

} catch (DocumentException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

}

public static void main(String[] args) {

HrReader reader=new HrReader();

reader.readXml();

}

}