java 读取文本文件的乱码问题？？？

void readFile(String path) // 显示打开文件的内容
 {
   try
   {
   File file = new File(path);
      
       
   BufferedReader br = new BufferedReader(new InputStreamReader(
   new FileInputStream(file), "GBK"));// 编码转换
  
   int size = (int) file.length();
   int charRead = 0;
   char[] content = new char[size];
     
   while (br.ready())
   {
   charRead += br.read(content, charRead, size - charRead);
   }
   br.close();
   text.setText(new String(content, 0, charRead));
   } catch (IOException e)
   {
   System.out.println("读取文件出错");
   }
     }