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"); } }