你好 运行出错不知道怎么解决？

package com.imooc.dom4j;

import java.io.File;
import java.io.FileOutputStream;
import java.io.OutputStreamWriter;
import java.io.Writer;

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

public class HrWriter {
	public static void writeXml() {
		File file=new File("C:\\eclipse2\\1.xml\\bin\\Hr.xml");
		SAXReader reader=new SAXReader();
		try {
			Document doc=reader.read(file);
			Element root=doc.getRootElement();
			Element employee=root.addElement("employee");
			employee.addAttribute("no", "13");
			employee.addElement("name").setText("Demon");
			employee.addElement("age").setText("23");
			employee.addElement("salary").setText("8000");
			Element department=employee.addElement("department");
			department.addElement("dname").setText("人事部");
			department.addElement("address").setText("西湖区");
			Writer writer=new OutputStreamWriter(new FileOutputStream(file),"UTF-8");
			doc.write(writer);
			writer.close();
		} catch (Exception e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		
	}
	public static void main(String[] args) {
		writeXml();
	}
}

<?xml version="1.0" encoding="UTF-8"?>
<!-- 人力资源管理系统 -->
<hr xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="Hr.xsd">
	<employee no="11">
		<name>小明</name>
		<age>22</age>
		<salary>3000</salary>
		<department>
			<dname>前端</dname>
			<address>西湖区</address>
		</department>
	</employee>
	
	<employee no="12">
		<name>小强</name>
		<age>25</age>
		<salary>80000</salary>
		<department>
			<dname>全栈</dname>
			<address>西湖区</address>
		</department>
	</employee>
</hr>

org.dom4j.DocumentException: 2 字节的 UTF-8 序列的字节 2 无效。

at org.dom4j.io.SAXReader.read(SAXReader.java:464)

at org.dom4j.io.SAXReader.read(SAXReader.java:246)

at com.imooc.dom4j.HrWriter.writeXml(HrWriter.java:17)

at com.imooc.dom4j.HrWriter.main(HrWriter.java:37)