package cn.com.jsoft.utils; import java.util.regex.Matcher; import java.util.regex.Pattern; public class PassHtmlUtils { private final static String regxpForHtml = "<([^>]*)>"; // 过滤所有以<开头以>结尾的标签 private final static String regxpForImgTag = "<]*)\\s<\\s*img\\s+([^>]*)\\s*>"; // 找出IMG标签 private final static String regxpForImaTagSrcAttrib = "src=\"([^\"]+)\""; // 找出IMG标签的SRC属性 /** * * 基本功能:替换标记以正常显示 * <p> * * @param input * @return String */ public String replaceTag(String input) { if (!hasSpecialChars(input)) { return input; } StringBuffer filtered = new StringBuffer(input.length()); char c; for (int i = 0; i <= input.length() - 1; i++) { c = input.charAt(i); switch (c) { case '<': filtered.append("<"); break; case '>': filtered.append(">"); break; case '"': filtered.append("""); break; case '&': filtered.append("&"); break; default: filtered.append(c); } } return (filtered.toString()); } /** * * 基本功能:判断标记是否存在 * <p> * * @param input * @return boolean */ public boolean hasSpecialChars(String input) { boolean flag = false; if ((input != null) && (input.length() > 0)) { char c; for (int i = 0; i <= input.length() - 1; i++) { c = input.charAt(i); switch (c) { case '>': flag = true; break; case '<': flag = true; break; case '"': flag = true; break; case '&': flag = true; break; } } } return flag; } /** * * 基本功能:过滤所有以"<"开头以">"结尾的标签 * <p> * * @param str * @return String */ public static String filterHtml(String str) { Pattern pattern = Pattern.compile(regxpForHtml); Matcher matcher = pattern.matcher(str); StringBuffer sb = new StringBuffer(); boolean result1 = matcher.find(); while (result1) { matcher.appendReplacement(sb, ""); result1 = matcher.find(); } matcher.appendTail(sb); return sb.toString(); } /** * * 基本功能:过滤指定标签 * <p> * * @param str * @param tag * 指定标签 * @return String */ public static String fiterHtmlTag(String str, String tag) { String regxp = "<\\s*" + tag + "]*)\\s<\\s+([^>]*)\\s*>"; Pattern pattern = Pattern.compile(regxp); Matcher matcher = pattern.matcher(str); StringBuffer sb = new StringBuffer(); boolean result1 = matcher.find(); while (result1) { matcher.appendReplacement(sb, ""); result1 = matcher.find(); } matcher.appendTail(sb); return sb.toString(); } /** * * 基本功能:替换指定的标签 * <p> * * @param str * @param beforeTag * 要替换的标签 * @param tagAttrib * 要替换的标签属性值 * @param startTag * 新标签开始标记 * @param endTag * 新标签结束标记 * @return String * @如:替换img标签的src属性值为[img]属性值[/img] */ public static String replaceHtmlTag(String str, String beforeTag, String tagAttrib, String startTag, String endTag) { String regxpForTag = "<\\s*" + beforeTag + "]*)\\s<\\s+([^>]*)\\s*>"; String regxpForTagAttrib = tagAttrib + "=\"([^\"]+)\""; Pattern patternForTag = Pattern.compile(regxpForTag); Pattern patternForAttrib = Pattern.compile(regxpForTagAttrib); Matcher matcherForTag = patternForTag.matcher(str); StringBuffer sb = new StringBuffer(); boolean result = matcherForTag.find(); while (result) { StringBuffer sbreplace = new StringBuffer(); Matcher matcherForAttrib = patternForAttrib.matcher(matcherForTag .group(1)); if (matcherForAttrib.find()) { matcherForAttrib.appendReplacement(sbreplace, startTag + matcherForAttrib.group(1) + endTag); } matcherForTag.appendReplacement(sb, sbreplace.toString()); result = matcherForTag.find(); } matcherForTag.appendTail(sb); return sb.toString(); } public static void main(String[] args) { System.out.println(filterHtml("<p style='TEXT-JUSTIFY: inter-ideograph; TEXT-ALIGN: left; LINE-HEIGHT: 150%; MARGIN: 6pt 0cm; FONT-FAMILY: 'Calibri','sans-serif'; FONT-SIZE: 10.5pt' align='left'></p><p>对于安卓4.0系统,使用电量控制窗口小部件可以轻松控制当前不用的功能,从而延长手机电池使用时间。默认情况下,这个窗口小部件显示在最左侧的主屏幕中。当该窗口小部件中显示了您觉得用不着的功能时,就可以关闭这些功能,从而延长电池使用时间。<br>如果当前的所有主屏幕中都没有电量控制窗口小部件,请执行以下步骤添加该窗口小部件:<br>1.转至【所有应用】屏幕,触摸【窗口小部件】标签。 </p><p>2.滑动手指浏览窗口小部件,从中找出【电量控制】,然后触摸并按住该窗口小部件。</p><p></p><p style='TEXT-ALIGN: center'><span style='LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; COLOR: black'><img src='E:/resource/images/uploadfile/20130516133022937001.gif' border='0'></span></p>")); } }