java io类

1）读写文本文件

public void writefile(String str, String path) {
		File file;
		FileOutputStream out;
		try {
			// 创建文件
			file = new File(path);
			file.createNewFile();
			// 打开文件file的OutputStream
			out = new FileOutputStream(file);
			String infoToWrite = str;
			// 将字符串转换成byte数组写入文件
			out.write(infoToWrite.getBytes());
			// 关闭文件file的OutputStream
			out.close();
		} catch (IOException e) {
		}
	}

	public String getinfo(String path) {
		File file;
		String str = "";
		FileInputStream in;
		try {
			// 打开文件file的InputStream
			file = new File(path);
			in = new FileInputStream(file);
			// 将文件内容全部读入到byte数组
			int length = (int) file.length();
			byte[] temp = new byte[length];
			in.read(temp, 0, length);
			// 将byte数组用UTF-8编码并存入display字符串中
			str = EncodingUtils.getString(temp, "UTF-8");
			// 关闭文件file的InputStream
			in.close();
		} catch (IOException e) {
		}
		return str;
	}