使用java 程序创建格式为utf-8文件的方法(写入和读取json文件)

使用java 程序创建格式为utf-8文件的方法：
  
try{
            File file=new   File("C:/11.jsp");  
            OutputStream out=new FileOutputStream(file);
            BufferedWriter   rd   =   new BufferedWriter(new OutputStreamWriter(out,"utf-8"));
            rd.write("333333333333中国");
            rd.close();
            out.close();
        }catch(IOException e){
            e.printStackTrace();
        }

 

//判断文件是否存在

//(获取服务器的config下的路径)
File fileExit = new File(this.getClass().getClassLoader().getResource(path).toURI().getPath());
if(!fileExit.exists()){
return fileContent;
}

//(获取webroot下文件路径)

ServletContext sctx = ServletActionContext.getServletContext();
String path = sctx.getRealPath("/");// 服务器文件路径
File filePath=new File("uploadfiles/temp/"+"2016-11-09");//拼接文件路径

String fileContent = "";
InputStreamReader file = new InputStreamReader(
IGetEshopid.class.getClassLoader()
.getResourceAsStream(path), "UTF-8");
BufferedReader reader = new BufferedReader(file);

String tempString = null;
while ((tempString = reader.readLine()) != null) {
fileContent += tempString;
}
reader.close();
return fileContent;