UTF-8 、Url 、 Unicode [Java]

Java实现Unicode与utf-8互转

// Unicode转中文
	public static String getUnicodeChina(String unicode) {
		/** 以 \ u 分割，因为java注释也能识别unicode，因此中间加了一个空格 */
		String[] strs = unicode.split("\\\\u");
		String returnStr = "";
		// 由于unicode字符串以 \ u 开头，因此分割出的第一个字符是""。
		for (int i = 1; i < strs.length; i++) {
			returnStr += (char) Integer.valueOf(strs[i], 16).intValue();
		}
		return returnStr;
	}

	// 中文转Unicode
	public static String getChinaUnicode(String china) {
		char[] chars = china.toCharArray();
		String returnStr = "";
		for (int i = 0; i < chars.length; i++) {
			returnStr += "\\u" + Integer.toString(chars[i], 16);
		}
		return returnStr;
	}

Java实现Url与utf-8互转
utf-8转Url

	public static String getFileUrlName(String agent, String filename)
			throws UnsupportedEncodingException {
		if (agent.contains("MSIE")) {
			filename = URLEncoder.encode(filename, "utf-8")
					.replaceAll("+", " ");
		} else if (agent.contains("Firefox")) {
			filename = "=?utf-8?B?"
					+ new BASE64Encoder().encode(filename.getBytes("utf-8"))
					+ "?=";
		} else {
			filename = URLEncoder.encode(filename, "utf-8");
		}
		return filename;
	}

Url转utf-8

public static String getFileChinaName(String agent, String filename)
			throws IOException {
		if (agent.contains("MSIE")) {
			filename = URLDecoder.decode(filename, "utf-8")
					.replaceAll("+", " ");
		} else if (agent.contains("Firefox")) {
			filename = "=?utf-8?B?"
					+ new String(new BASE64Decoder().decodeBuffer(filename),
							"utf-8") + "?=";
		} else {
			filename = URLDecoder.decode(filename, "utf-8");
		}
		return filename;
	}