Lösung für chinesischen verstümmelten Code beim Schreiben von XML in Java

public String createXMLbyId(){
  
  Course c = courseService.getCourseById(17);
  
  try{
   //获取当前时间 （注意格式）
   SimpleDateFormat tempDate = new SimpleDateFormat("yyyy-MM-dd" + " " + "hh:mm:ss");
   String datetime = tempDate.format(new java.util.Date());
   
   FileOutputStream fo = new FileOutputStream("D:/Program Files/work space/sedu/WebRoot/static/apixml/qq.xml");


     PrintStream so = new PrintStream(fo,true,"utf-8");     //关键是这句：要用 带指定编码格式的 构造方法


   so.println("<?xml version=/"1.0/" encoding=/"utf-8/"?>");
   so.println("<root>");
   so.println("<version>1.0</version>");
   so.println("<datetime>"+datetime+"</datetime>");
   so.println("<company_id>SunLand</company_id>");
   so.println("<item_ids>");
   
   if(c!=null){
    so.println("<item>");
    so.println("<outer_id>"+c.getCourseId()+"</outer_id>");
    so.println("<title>"+c.getTitle()+"</title>");
    so.println("</item>");
   }
    so.println("</item_ids>");
    so.println("</root>");
    
    System.out.println("文件生成成功！");
    
 }catch(Exception e){
  e.printStackTrace();
  System.out.println("文件生成失败！");
 }
  
  return "fanfan";
 }