Java VCF 格式解析

  Java VCF 格式解析

vcf可以用记事本打开，格式如下：

BEGIN:VCARD
VERSION:2.1
N;CHARSET=UTF-8;ENCODING=QUOTED-PRINTABLE:=E5=BC=A0=E4=B8=89;;
FN;CHARSET=UTF-8;ENCODING=QUOTED-PRINTABLE:=E5=BC=A0=E4=B8=89
TEL;VOICE;PREF:1-370-000-0000
PHOTO;ENCODING=BASE64;PNG:iVBORw0KGgoAAAANSUhEUgAAAGAAAABgCAIAAABt+uBvAAAA。。。。

END:VCARD

java code：

import java.awt.image.BufferedImage;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import javax.imageio.ImageIO;
import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder;

public class VCFTest {
	public static void main(String[] args) {
		String name = "张三";
		VCFTest vt =new VCFTest();
		
		try {
			//将字符串转换成utf-8 quoted-printable 格式
			String str = vt.qpEncodeingUTF8(name);
			System.out.println(str);
			//将字符串utf-8 quoted-printable 格式 转换成正常格式
			str = vt.qpDecodingUTF8(str);
			System.out.println(str);
			
			String path ="d:\\aa.png";
			//将图片转换成base64格式字符
			//str = vt.BASE64Encodeing(path);
			//将base64格式字符转换成图片
			//vt.BASE64Decoding(str,"png", path);
			
		} catch (Exception e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}

	/**
	 * 编码 图片 转换为 BASE64 
	 * @param path 图片路径
	 * @return 转换后的字符串
	 * @throws Exception
	 */
	public String BASE64Encodeing(String path) throws Exception {
		BASE64Encoder encoder = new BASE64Encoder();
		File file = new File(path);
		FileInputStream fis = new FileInputStream(file);
		byte[] buffer = new byte[(int) file.length()];
		fis.read(buffer);
		return encoder.encode(buffer);
	}

	/**
	 * 解码 BASE64 保存为图片
	 * @param str 需要解码的字符串
	 * @param imgType 解码图片类型
	 * @param path 解码后图片保存的位置
	 * @return 解码是否完成
	 * @throws Exception
	 */
	public boolean BASE64Decoding(String str, String imgType, String path) throws Exception {
		BASE64Decoder decoder = new BASE64Decoder();
		byte[] ib = decoder.decodeBuffer(str);
		BufferedImage bi = ImageIO.read(new ByteArrayInputStream(ib));
		boolean isFinish = ImageIO.write(bi, imgType, new File(path));
		bi.flush();
		return isFinish;
	}

	/**
	 * 编码 UTF8 quoted-printable 
	 * @param str 需要编码的字符串
	 * @return 编码后的字符串
	 * @throws Exception
	 */
	public String qpEncodeingUTF8(String str) throws Exception {
		if (str != null) {
			char[] encode = str.toCharArray();
			StringBuffer sb = new StringBuffer();
			for (int i = 0; i < encode.length; i++) {
				if ((encode[i] >= '!') && (encode[i] <= '~')
						&& (encode[i] != '=') && (encode[i] != '\n')) {
					sb.append(encode[i]);
				} else if (encode[i] == '=') {
					sb.append("=3D");
				} else if (encode[i] == '\n') {
					sb.append("\n");
				} else {
					StringBuffer sbother = new StringBuffer();
					sbother.append(encode[i]);
					String ss = sbother.toString();
					byte[] buf = null;
					buf = ss.getBytes("utf-8");
					// UTF-8: buf.length == 3
					// GBK: buf.length == 2
					if (buf.length == 3) {
						for (int j = 0; j < buf.length; j++) {
							String s16 = String.valueOf(Integer
									.toHexString(buf[j]));
							char c16_6;
							char c16_7;
							if (s16.charAt(6) >= 97 && s16.charAt(6) <= 122) {
								c16_6 = (char) (s16.charAt(6) - 32);
							} else {
								c16_6 = s16.charAt(6);
							}
							if (s16.charAt(7) >= 97 && s16.charAt(7) <= 122) {
								c16_7 = (char) (s16.charAt(7) - 32);
							} else {
								c16_7 = s16.charAt(7);
							}
							sb.append("=" + c16_6 + c16_7);
						}
					}
				}
			}
			str = sb.toString();
		}
		return str;
	}

	/**
	 * 解码 UTF8 quoted-printable 
	 * @param str 需要解码的字符串
	 * @return 解码后的字符串
	 * @throws Exception
	 */
	public String qpDecodingUTF8(String str) throws Exception {
		if (str != null) {
			StringBuffer sb = new StringBuffer(str);
			for (int i = 0; i < sb.length(); i++) {
				if (sb.charAt(i) == '\n' && sb.charAt(i - 1) == '=') {
					sb.deleteCharAt(i - 1);
				}
			}
			str = sb.toString();
			byte[] bytes = str.getBytes("US-ASCII");
			for (int i = 0; i < bytes.length; i++) {
				byte b = bytes[i];
				if (b != 95) {
					bytes[i] = b;
				} else {
					bytes[i] = 32;
				}
			}
			if (bytes != null) {
				ByteArrayOutputStream buffer = new ByteArrayOutputStream();
				for (int i = 0; i < bytes.length; i++) {
					int b = bytes[i];
					if (b == '=') {
						try {
							int u = Character.digit((char) bytes[++i], 16);
							int l = Character.digit((char) bytes[++i], 16);
							if (u == -1 || l == -1) {
								continue;
							}
							buffer.write((char) ((u << 4) + l));
						} catch (ArrayIndexOutOfBoundsException e) {
							e.printStackTrace();
						}
					} else {
						buffer.write(b);
					}
				}
				str = new String(buffer.toByteArray(), "UTF-8");
			}
		}
		return str;
	}
}

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