java.util.regex.Matcher#appendReplacement ( )源码实例Demo

private static Octets str2Oct(String str)
{
	String matchStr = "";
	try
	{
		Matcher mat = s_patHex.matcher(str);
		if (!mat.find())
			return Octets.wrap(str.getBytes(s_cs88591));
		StringBuilder sb = new StringBuilder(str.length());
		do
		{
			matchStr = mat.group(1);
			mat.appendReplacement(sb, Matcher.quoteReplacement(String.valueOf((char)(Integer.parseInt(matchStr, 16)))));
		}
		while (mat.find());
		return Octets.wrap(mat.appendTail(sb).toString().getBytes(s_cs88591));
	}
	catch (RuntimeException e)
	{
		System.err.println("ERROR: parse failed: '" + matchStr + "' in '" + str + '\'');
		throw e;
	}
}
 

/**
 * Retrieves a value from the current stash.
 * The stash contains fields eventually extracted from previous responses that can be reused
 * as arguments for following requests (e.g. scroll_id)
 */
public Object getValue(String key) throws IOException {
    if (key.charAt(0) == '$' && key.charAt(1) != '{') {
        return unstash(key.substring(1));
    }
    Matcher matcher = EXTENDED_KEY.matcher(key);
    /*
     * String*Buffer* because that is what the Matcher API takes. In modern versions of java the uncontended synchronization is very,
     * very cheap so that should not be a problem.
     */
    StringBuffer result = new StringBuffer(key.length());
    if (false == matcher.find()) {
        throw new IllegalArgumentException("Doesn't contain any stash keys [" + key + "]");
    }
    do {
        matcher.appendReplacement(result, Matcher.quoteReplacement(unstash(matcher.group(1)).toString()));
    } while (matcher.find());
    matcher.appendTail(result);
    return result.toString();
}
 

/**
 * 执行interpolation(变量插入)。
 * 
 * @param expression 含有变量的表达式字符串。表达式中的变量名也可以用<code>{}</code>括起来。
 * @param params 变量集。变量名可以包含<code>.</code>、<code>_</code>字符。
 * @return 完成interpolation后的字符串。 如：<code><pre>xxx${name}zzz -> xxxjerryzzz</pre></code>（其中变量name="jerry"）
 * @throws IllegalStateException 表达式字符串中使用到的变量 在变量集中没有
 */
// FIMXE 抛出IllegalStateException异常，是否合适？！
public static String interpolate(String expression, Map<String, String> params) {
    if (expression == null || expression.length() == 0) {
        throw new IllegalArgumentException("glob pattern is empty!");
    }
    if (expression.indexOf('$') < 0) {
        return expression;
    }
    Matcher matcher = VARIABLE_PATTERN.matcher(expression);
    StringBuffer sb = new StringBuffer();
    while (matcher.find()) { // 逐个匹配
        String key = matcher.group(1);
        String value = params == null ? null: params.get(key);
        if (value == null) {
        	value = "";
        }
        matcher.appendReplacement(sb, value);
    }
    matcher.appendTail(sb);
    return sb.toString();
}
 

private String substitute(String input, Mapper mapper) {
	StringBuffer buffer = new StringBuffer();
	for (String find : correction.keySet()) {
		Pattern pattern = Pattern.compile(find, CASE_INSENSITIVE
				| UNICODE_CASE);
		Matcher matcher = pattern.matcher(input);
		String replace = correction.get(find);

		mapper.prepare(input, find, replace);
		while (!matcher.hitEnd() && matcher.find()) {
			mapper.update(matcher.start() + 1);
			matcher.appendReplacement(buffer, replace);
		}

		matcher.appendTail(buffer);
		input = buffer.toString();
		buffer.delete(0, buffer.length());
	}

	return input;
}
 

private String computeReplacementString(Pattern pattern, String originalText, String replacementText,
        String lineDelimiter) throws PatternSyntaxException {
    if (pattern != null) {
        try {
            replacementText = PatternConstructor.interpretReplaceEscapes(replacementText, originalText,
                    lineDelimiter);

            Matcher matcher = pattern.matcher(originalText);
            StringBuffer sb = new StringBuffer();
            matcher.reset();
            if (matcher.find()) {
                matcher.appendReplacement(sb, replacementText);
            } else {
                return null;
            }
            matcher.appendTail(sb);
            return sb.toString();
        } catch (IndexOutOfBoundsException ex) {
            throw new PatternSyntaxException(ex.getLocalizedMessage(), replacementText, -1);
        }
    }
    return replacementText;
}
 

public static String urlDecode(String encoded, String encoding) {
    try {
        Matcher m = RE_URL_ENCODED_CHARS.matcher(encoded);
        StringBuffer sb = new StringBuffer(encoded.length());
        while (m.find()) {
            String chars = m.group(0);
            m.appendReplacement(sb, new String(parseBytes(chars), encoding));
        }
        m.appendTail(sb);
        return sb.toString();
    } catch (UnsupportedEncodingException e) {
        throw new MisconfigurationException("core.UNSUPPORTED_ENCODING", encoding, e);
    }
}
 

static String compile(String binaryRegex) {
    Matcher matcher = HEX_VALUE.matcher(binaryRegex);
    StringBuffer sb = new StringBuffer();
    while (matcher.find()) {
        String value = matcher.group();
        if (!value.startsWith(ESCAPED_ESCAPE_CHAR)) {
            value = convertByte(value.substring(2));
        }
        matcher.appendReplacement(sb, value);
    }
    matcher.appendTail(sb);
    return sb.toString();
}
 

/**
 * Substitute property values in BalloonStyle text template
 *
 * @param template text template
 * @param placemark placemark to get property values from
 * @return string with property values substituted
 */
public static String substituteProperties(String template, KmlPlacemark placemark) {
    StringBuffer sb = new StringBuffer();
    Pattern pattern = Pattern.compile("\\$\\[(.+?)]");
    Matcher matcher = pattern.matcher(template);
    while (matcher.find()) {
        String property = matcher.group(1);
        String value = placemark.getProperty(property);
        if (value != null) {
            matcher.appendReplacement(sb, value);
        }
    }
    matcher.appendTail(sb);
    return sb.toString();
}
 

/**
 * Utility method to replace all occurrences given by the specific backreference with its uppercased form, and
 * remove all other backreferences. <p> The Java {@link Pattern regular expression processing} does not use the
 * preprocessing directives <code>\l</code>, <code>&#92;u</code>, <code>\L</code>, and <code>\U</code>. If so, such
 * directives could be used in the replacement string to uppercase or lowercase the backreferences. For example,
 * <code>\L1</code> would lowercase the first backreference, and <code>&#92;u3</code> would uppercase the 3rd
 * backreference. </p>
 *
 * @return the input string with the appropriate characters converted to upper-case
 */
protected static String replaceAllWithUppercase( String input, String regex, int groupNumberToUppercase ) {
    Pattern underscoreAndDotPattern = Pattern.compile( regex );
    Matcher matcher = underscoreAndDotPattern.matcher( input );
    StringBuffer sb = new StringBuffer();
    while ( matcher.find() ) {
        matcher.appendReplacement( sb, matcher.group( groupNumberToUppercase ).toUpperCase() );
    }
    matcher.appendTail( sb );
    return sb.toString();
}
 

/**
 * Xóa nội dung của String defStr theo Pattern pat
 * @param defStr
 * @param pat
 * @return
 */
public static StringBuffer removePatternContents(String defStr, Pattern pat) {
	Matcher mat = pat.matcher(defStr);
	StringBuffer sb = new StringBuffer();
	while (mat.find()) {
		mat.appendReplacement(sb, " ");
	}
	mat.appendTail(sb);
	return sb;
}
 

/**
 * 驼峰转下划线,效率比上面高
 * @param str
 * @return
 */
public static String humpToLine2(String str) {
    Matcher matcher = humpPattern.matcher(str);
    StringBuffer sb = new StringBuffer();
    while (matcher.find()) {
        matcher.appendReplacement(sb, "_" + matcher.group(0).toLowerCase());
    }
    matcher.appendTail(sb);
    return sb.toString();
}
 

/**
 * Utility method that finds all occurrences of variable references and
 * replaces them with their values.
 * Values are taken from <code>varMap</code> and escaped. If they are
 * not present there, system properties are queried. If not found there
 * the variable reference is replaced with the same string with special
 * characters escaped.
 * 
 * @param value String value where the variables have to be replaced with values
 * @param varMap mapping of variable names to their values
 * @return String where the all the replacement was done
 */
public static String doSub(String value, Map<String, String> varMap) {
    try {
        Matcher matcher = pattern.matcher(value);
        boolean result = matcher.find();
        if (result) {
            StringBuffer sb = new StringBuffer(value.length() * 2);
            do {
                String key = matcher.group(1);
                String replacement = varMap.get(key);
                if (replacement == null) {
                    replacement = System.getProperty(key);
                    if (replacement != null) {
                        replacement = escapePath(replacement);
                    } else {
                        replacement = "\\$\\{" + key + "\\}"; // NOI18N
                    }
                } else {
                    replacement = escapePath(replacement);
                }
                matcher.appendReplacement(sb, replacement);
                result = matcher.find();
            } while (result);
            matcher.appendTail(sb);
            value = sb.toString();
        }
    } catch (Exception ex) {
        Logger.getLogger("glassfish").log(Level.INFO, ex.getLocalizedMessage(), ex); // NOI18N
    }
    return value;
}
 

@Override
public String expandMacro(String queryString) {
    count = 0;
    Matcher matcher = macroPattern.matcher(queryString);
    StringBuffer sb = new StringBuffer();
    while (matcher.find()) {
        matcher.appendReplacement(sb, doExpand(matcher.group(1)));
    }
    matcher.appendTail(sb);
    return sb.toString();
}
 

private String resolveKey(String key) {
	Matcher matcher = PATTERN.matcher(key);
	StringBuffer sb = new StringBuffer();
	while (matcher.find()) {
		matcher.appendReplacement(sb, matcher.group(1).toUpperCase());
	}
	matcher.appendTail(sb);
	return sb.toString();
}
 

/**
 * Expand variables such as "{nms}" and "{obc}" to their corresponding packages.
 *
 * @param name - the full name of the class.
 * @return The expanded string.
 */
private static String expandVariables(String name) {
    StringBuffer output = new StringBuffer();
    Matcher matcher = MATCH_VARIABLE.matcher(name);

    while (matcher.find()) {
        String variable = matcher.group(1);
        String replacement;

        // Expand all detected variables
        if ("nms".equalsIgnoreCase(variable)) {
            replacement = NMS_PREFIX;
        } else if ("obc".equalsIgnoreCase(variable)) {
            replacement = OBC_PREFIX;
        } else if ("version".equalsIgnoreCase(variable)) {
            replacement = VERSION;
        } else {
            throw new IllegalArgumentException("Unknown variable: " + variable);
        }

        // Assume the expanded variables are all packages, and append a dot
        if (!replacement.isEmpty() && matcher.end() < name.length() && name.charAt(matcher.end()) != '.') {
            replacement += ".";
        }
        matcher.appendReplacement(output, Matcher.quoteReplacement(replacement));
    }

    matcher.appendTail(output);
    return output.toString();
}
 

public static String parse ( String input ) {
	
	Pattern pattern = Pattern.compile( "\\{([^\\}]+)\\}", Pattern.CASE_INSENSITIVE  );
	Matcher matcher = pattern.matcher(input);
	
	PathFormat.currentDate = new Date();
	
	StringBuffer sb = new StringBuffer();
	
	while ( matcher.find() ) {
		
		matcher.appendReplacement(sb, PathFormat.getString( matcher.group( 1 ) ) );
		
	}
	
	matcher.appendTail(sb);
	
	return sb.toString();
}
 

/** Normalizes all dates in a String 
 * Note: If you bugfix something in this version, 
 * please check for applying the same fix at the position change tracking function below */
public static String normalize(CharSequence s, Language language) {

  Pattern monthPattern;
  String[] months = null;
  if (language.equals(Language.ENGLISH)) {
    months = MONTHS_EN;
    monthPattern = monthPatternEn;
  } else if (language.equals(Language.GERMAN)) {
    months = MONTHS_DE;
    monthPattern = monthPatternDe;
  } else if (language.equals(Language.SPANISH)) {
    months = MONTHS_ES;
    monthPattern = monthPatternEs;
  } else if (language.equals(Language.FRENCH)) {
    months = MONTHS_FR;
    monthPattern = monthPatternFr;
  } else if (language.equals(Language.ITALIAN)) {
    months = MONTHS_IT;
    monthPattern = monthPatternIt;
  } else {
    throw new IllegalArgumentException("Unsupported language: " + language);
  }

  // If it does not contain years or months, return it unchanged
  if (!monthPattern.matcher(s).find() && !yearPattern.matcher(s).find()) return (s.toString());

  StringBuffer in = new StringBuffer((int) (s.length() * 1.1));

  // Replace all the months
  Matcher m = monthPattern.matcher(s);
  while (m.find()) {
    int monthNum = D.indexOf(m.group().substring(0, 3), (Object[]) months);
    if (monthNum == -1) monthNum = D.indexOf(m.group().substring(0, 4), (Object[]) months);
    monthNum++; // convert from 0-based to 1-based
    m.appendReplacement(in, "MONTH" + (monthNum / 10) + (monthNum % 10));
  }
  m.appendTail(in);
  StringBuffer out = new StringBuffer((int) (in.length() * 1.1));

  // Apply the patterns
  for (FindReplace p : patterns) {
    m = p.pattern.matcher(in);
    if (m.find()) {
      out.setLength(0);
      do {
        m.appendReplacement(out, p.replacement);
      } while (m.find());
      m.appendTail(out);
      StringBuffer temp = out;
      out = in;
      in = temp;
    }

  }

  m = Pattern.compile("&DEC(\\d++)").matcher(in);
  if (m.find()) {
    out.setLength(0);
    do {
      m.appendReplacement(out, "" + (Integer.parseInt(m.group(1)) - 1));
    } while (m.find());
    m.appendTail(out);
    in = null;
    return (out.toString());
  }
  out = null;
  return (in.toString());
}
 

public void doFilter(final ServletRequest req, final ServletResponse resp, final FilterChain chain) throws IOException, ServletException
{
  final String uri = ((HttpServletRequest) req).getRequestURI();
  if (uri.matches(".*/ProjectForge.*.html") == false) {
    chain.doFilter(req, resp);
    return;
  }
  final PrintWriter out = resp.getWriter();
  final CharResponseWrapper wrapper = new CharResponseWrapper((HttpServletResponse) resp);
  chain.doFilter(req, wrapper);
  final CharArrayWriter caw = new CharArrayWriter();
  final String tutorialUrl = ((HttpServletResponse) resp).encodeURL(WicketUtils.getAbsoluteUrl("/wa/tutorial"));
  final String regexp = "(\\{actionLink\\|)([a-zA-Z0-9]*)\\|([a-zA-Z0-9_\\-]*)(\\})([^\\{]*)(\\{/actionLink\\})";
  final Pattern p = Pattern.compile(regexp, Pattern.MULTILINE | Pattern.DOTALL); // Compiles regular expression into Pattern.
  final Matcher m = p.matcher(wrapper.toString());
  final StringBuffer buf = new StringBuffer();
  // final String html = m.replaceAll(tutorialUrl + "/Hurzel");
  try {
    while (m.find() == true) {
      int i = 2;
      if (m.groupCount() != 6) {
        buf.append("{actionLink syntax error: " + m.groupCount() + ".}");
        continue;
      }
      // {actionLink|createUser|linda}create{/actionLink}
      m.appendReplacement(buf, "<a target=\"tutorial\" href=\"");
      buf.append(tutorialUrl);
      final String type = m.group(i++); // createUser
      if (type == null) {
        buf.append("\">create</a>");
        continue;
      }
      buf.append("?type=").append(type).append("&ref=");
      final String ref = m.group(i++);
      if (ref == null) {
        buf.append("\">create</a>");
        continue;
      }
      buf.append(ref).append("\"><img src=\"images/actionlink_add.png\" style=\"vertical-align:middle;border:none;\" />");
      i++; // }
      final String label = m.group(i++);
      if (label == null) {
        buf.append("\">create</a>");
        continue;
      }
      buf.append(label);
      buf.append("</a>");
    }
    m.appendTail(buf);
  } catch (final Exception ex) {
    log.error(ex.getMessage(), ex);
  }

  // html = html.replace("{actionLink}", tutorialUrl);
  // <link url="{actionLink}?type=createUser&amp;ref=linda" target="tutorial">create</link>
  caw.write(buf.toString());
  // caw.write(wrapper.toString().substring(0, wrapper.toString().indexOf("</body>") - 1));
  // caw.write("<p>\n<center>" + messages.getString("Visitor") + "<font color='red'>" + counter.getCounter() + "</font></center>");
  // caw.write("\n</body></html>");
  resp.setContentLength(caw.toString().length());
  out.write(caw.toString());
  out.close();
}
 

/**
 * Resolves hyperlink placeholders to URLs in a Flash variable.
 * 
 * @param text the text in which hyperlink placeholders are to be replaced
 * @param element the print element where hyperlink parameters will be looked for
 * @param linkProducer the hyperlink producer which transforms hyperlink
 * objects to String URLs
 * @return the text with hyperlink placeholders replaced by URLs
 * @see #makeLinkPlaceholder(String)
 */
public static String resolveLinks(String text,
		JRGenericPrintElement element,
		JRHyperlinkProducer linkProducer,
		boolean prepareForSerialization)
{
	Matcher matcher = LINK_PATTERN.matcher(text);
	StringBuffer xml = new StringBuffer();
	List<HyperlinkData> hyperlinksData = new ArrayList<HyperlinkData>();

	while (matcher.find())
	{
		String paramName = matcher.group(LINK_PARAM_NAME_GROUP);
		JRPrintHyperlink hyperlink = 
			(JRPrintHyperlink) element.getParameterValue(paramName);
		
		String replacement;
		if (hyperlink == null)
		{
			if (log.isWarnEnabled())
			{
				log.warn("Hyperlink parameter " + paramName 
						+ " not found in element");
			}
			
			replacement = null;
		}
		else
		{
			replacement = linkProducer.getHyperlink(hyperlink);
			if (prepareForSerialization) {
				String id = String.valueOf(hyperlink.hashCode() & 0x7FFFFFFF);

				HyperlinkData hyperlinkData = new HyperlinkData();
				hyperlinkData.setId(id);
				hyperlinkData.setHref(replacement);
				hyperlinkData.setHyperlink(hyperlink);
				hyperlinkData.setSelector("._jrHyperLink." + hyperlink.getLinkType());
				replacement = "jrhl-" + id + ";" + hyperlink.getLinkType();

				hyperlinksData.add(hyperlinkData);
			}
		}
		
		if (replacement == null)
		{
			replacement = "";
		}
		else
		{
			try
			{
				if (!prepareForSerialization) {
					replacement = URLEncoder.encode(replacement, "UTF-8");
				}
			}
			catch (UnsupportedEncodingException e)
			{
				throw new JRRuntimeException(e);
			}
		}
		
		matcher.appendReplacement(xml, replacement);
	}
	matcher.appendTail(xml);

	if (hyperlinksData.size() > 0) {
		element.setParameterValue("hyperlinksData", hyperlinksData);
	}
	
	return xml.toString();

}
 

/**
 * Adds a comma-separated list of the short {@code Class} names of the
 * method argument types to the output. For example, if a method has signature
 * {@code put(java.lang.String, java.lang.Object)} then the value returned
 * will be {@code String, Object}.
 * @param methodInvocation the {@code MethodInvocation} being logged.
 * Arguments will be retrieved from the corresponding {@code Method}.
 * @param matcher the {@code Matcher} containing the state of the output
 * @param output the {@code StringBuffer} containing the output
 */
private void appendArgumentTypes(MethodInvocation methodInvocation, Matcher matcher, StringBuffer output) {
	Class<?>[] argumentTypes = methodInvocation.getMethod().getParameterTypes();
	String[] argumentTypeShortNames = new String[argumentTypes.length];
	for (int i = 0; i < argumentTypeShortNames.length; i++) {
		argumentTypeShortNames[i] = ClassUtils.getShortName(argumentTypes[i]);
	}
	matcher.appendReplacement(output,
			Matcher.quoteReplacement(StringUtils.arrayToCommaDelimitedString(argumentTypeShortNames)));
}