简单的解决了读取前判断TXT的编码问题……

// 显示打开文件的内容void readFile(String path){try{File file = new File(path);InputStream fs = new FileInputStream(file);BufferedReader br ;// byte[] buffer = new byte[fs.available()];byte[] buffer = new byte[3];fs.read(buffer);fs.close();String str = "";int size = (int) file.length();int charRead = 0;char[] content = new char[size];// byte[] content = new byte[size];//判断文件的编码if (buffer[0] == -17 && buffer[1] == -69 && buffer[2] == -65){br = new BufferedReader(new InputStreamReader(new FileInputStream(file), "utf-8"));// 编码转换while (br.ready()){charRead += br.read(content, charRead, size - charRead);}br.close();str = new String(content, 0, charRead);text.setText(str);} else{br = new BufferedReader(new InputStreamReader(new FileInputStream(file), "gbk"));// 编码转换while (br.ready()){charRead += br.read(content, charRead, size - charRead);}br.close();str = new String(content, 0, charRead);text.setText(str);}} catch (IOException e){System.out.println("读取文件出错");}}