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Java压缩html

發布時間：2025/3/15 java 20 豆豆

生活随笔收集整理的這篇文章主要介紹了 Java压缩html 小編覺得挺不錯的,現在分享給大家,幫大家做個參考.

從網上找的一段代碼，可以壓縮html,不過是java的，等不忙時，把它轉為C#的。

import java.io.StringReader;
import java.io.StringWriter;
import java.util.*;
import java.util.regex.*;

/*******************************************
?* 壓縮jsp,html中的代碼，去掉所有空白符、換行符
?* @author? bearrui(ak-47)
?* @version 0.1
?* @date???? 2010-5-13
?*******************************************/
public class HtmlCompressor {
?private static String tempPreBlock = "%%%HTMLCOMPRESS~PRE&&&";
?private static String tempTextAreaBlock = "%%%HTMLCOMPRESS~TEXTAREA&&&";
?private static String tempScriptBlock = "%%%HTMLCOMPRESS~SCRIPT&&&";
?private static String tempStyleBlock = "%%%HTMLCOMPRESS~STYLE&&&";
?private static String tempJspBlock = "%%%HTMLCOMPRESS~JSP&&&";
?
?private static Pattern commentPattern = Pattern.compile("", Pattern.DOTALL | Pattern.CASE_INSENSITIVE | Pattern.MULTILINE);
?private static Pattern itsPattern = Pattern.compile(">\\s+?<", Pattern.DOTALL | Pattern.CASE_INSENSITIVE | Pattern.MULTILINE);
?private static Pattern prePattern = Pattern.compile("<pre[^>]*?>.*?</pre>", Pattern.DOTALL | Pattern.CASE_INSENSITIVE | Pattern.MULTILINE);
?private static Pattern taPattern = Pattern.compile("<textarea[^>]*?>.*?</textarea>", Pattern.DOTALL | Pattern.CASE_INSENSITIVE | Pattern.MULTILINE);
?private static Pattern jspPattern = Pattern.compile("<%([^-@][\\w\\W]*?)%>", Pattern.DOTALL | Pattern.CASE_INSENSITIVE | Pattern.MULTILINE);
?// <script></script>
?private static Pattern scriptPattern = Pattern.compile("(?:<script\\s*>|<script type=['\"]text/javascript['\"]\\s*>)(.*?)</script>", Pattern.DOTALL | Pattern.CASE_INSENSITIVE | Pattern.MULTILINE);
?private static Pattern stylePattern = Pattern.compile("<style[^>()]*?>(.+)</style>", Pattern.DOTALL | Pattern.CASE_INSENSITIVE | Pattern.MULTILINE);

?// 單行注釋，
?private static Pattern signleCommentPattern = Pattern.compile("//.*");
?// 字符串匹配
?private static Pattern stringPattern = Pattern.compile("(\"[^\"\\n]*?\"|'[^'\\n]*?')");
?// trim去空格和換行符
?private static Pattern trimPattern = Pattern.compile("\\n\\s*",Pattern.MULTILINE);
?private static Pattern trimPattern2 = Pattern.compile("\\s*\\r",Pattern.MULTILINE);
?// 多行注釋
?private static Pattern multiCommentPattern = Pattern.compile("/\\*.*?\\*/", Pattern.DOTALL | Pattern.CASE_INSENSITIVE | Pattern.MULTILINE);

?private static String tempSingleCommentBlock = "%%%HTMLCOMPRESS~SINGLECOMMENT&&&";? // //占位符
?private static String tempMulitCommentBlock1 = "%%%HTMLCOMPRESS~MULITCOMMENT1&&&";? // /*占位符
?private static String tempMulitCommentBlock2 = "%%%HTMLCOMPRESS~MULITCOMMENT2&&&";? // */占位符
?
?
?public static String compress(String html) throws Exception {
??if(html == null || html.length() == 0) {
???return html;
??}
??
??List<String> preBlocks = new ArrayList<String>();
??List<String> taBlocks = new ArrayList<String>();
??List<String> scriptBlocks = new ArrayList<String>();
??List<String> styleBlocks = new ArrayList<String>();
??List<String> jspBlocks = new ArrayList<String>();
??
??String result = html;
??
??//preserve inline java code
??Matcher jspMatcher = jspPattern.matcher(result);
??while(jspMatcher.find()) {
???jspBlocks.add(jspMatcher.group(0));
??}
??result = jspMatcher.replaceAll(tempJspBlock);
??
??//preserve PRE tags
??Matcher preMatcher = prePattern.matcher(result);
??while(preMatcher.find()) {
???preBlocks.add(preMatcher.group(0));
??}
??result = preMatcher.replaceAll(tempPreBlock);
??
??//preserve TEXTAREA tags
??Matcher taMatcher = taPattern.matcher(result);
??while(taMatcher.find()) {
???taBlocks.add(taMatcher.group(0));
??}
??result = taMatcher.replaceAll(tempTextAreaBlock);
??
??//preserve SCRIPT tags
??Matcher scriptMatcher = scriptPattern.matcher(result);
??while(scriptMatcher.find()) {
???scriptBlocks.add(scriptMatcher.group(0));
??}
??result = scriptMatcher.replaceAll(tempScriptBlock);
??
??// don't process inline css
??Matcher styleMatcher = stylePattern.matcher(result);
??while(styleMatcher.find()) {
???styleBlocks.add(styleMatcher.group(0));
??}
??result = styleMatcher.replaceAll(tempStyleBlock);
??
??//process pure html
??result = processHtml(result);
??
??//process preserved blocks
??result = processPreBlocks(result, preBlocks);
??result = processTextareaBlocks(result, taBlocks);
??result = processScriptBlocks(result, scriptBlocks);
??result = processStyleBlocks(result, styleBlocks);
??result = processJspBlocks(result, jspBlocks);
??
??preBlocks = taBlocks = scriptBlocks = styleBlocks = jspBlocks = null;
??
??return result.trim();
?}
?
?private static String processHtml(String html) {
??String result = html;
??
??//remove comments
//??if(removeComments) {
???result = commentPattern.matcher(result).replaceAll("");
//??}
??
??//remove inter-tag spaces
//??if(removeIntertagSpaces) {
???result = itsPattern.matcher(result).replaceAll("><");
//??}
??
??//remove multi whitespace characters
//??if(removeMultiSpaces) {
???result = result.replaceAll("\\s{2,}"," ");
//??}
????
??return result;
?}
?
?private static String processJspBlocks(String html, List<String> blocks){
??String result = html;
??for(int i = 0; i < blocks.size(); i++) {
???blocks.set(i, compressJsp(blocks.get(i)));
??}
??//put preserved blocks back
??while(result.contains(tempJspBlock)) {
???result = result.replaceFirst(tempJspBlock, Matcher.quoteReplacement(blocks.remove(0)));
??}
??
??return result;
?}
?private static String processPreBlocks(String html, List<String> blocks) throws Exception {
??String result = html;
??
??//put preserved blocks back
??while(result.contains(tempPreBlock)) {
???result = result.replaceFirst(tempPreBlock, Matcher.quoteReplacement(blocks.remove(0)));
??}
??
??return result;
?}
?
?private static String processTextareaBlocks(String html, List<String> blocks) throws Exception {
??String result = html;
??
??//put preserved blocks back
??while(result.contains(tempTextAreaBlock)) {
???result = result.replaceFirst(tempTextAreaBlock, Matcher.quoteReplacement(blocks.remove(0)));
??}
??
??return result;
?}
?
?private static String processScriptBlocks(String html, List<String> blocks) throws Exception {
??String result = html;
??
//??if(compressJavaScript) {
???for(int i = 0; i < blocks.size(); i++) {
????blocks.set(i, compressJavaScript(blocks.get(i)));
???}
//??}
??
??//put preserved blocks back
??while(result.contains(tempScriptBlock)) {
???result = result.replaceFirst(tempScriptBlock, Matcher.quoteReplacement(blocks.remove(0)));
??}
??
??return result;
?}
?
?private static String processStyleBlocks(String html, List<String> blocks) throws Exception {
??String result = html;
??
//??if(compressCss) {
???for(int i = 0; i < blocks.size(); i++) {
????blocks.set(i, compressCssStyles(blocks.get(i)));
???}
//??}
??
??//put preserved blocks back
??while(result.contains(tempStyleBlock)) {
???result = result.replaceFirst(tempStyleBlock, Matcher.quoteReplacement(blocks.remove(0)));
??}
??
??return result;
?}
?
?private static String compressJsp(String source)? {
??//check if block is not empty
??Matcher jspMatcher = jspPattern.matcher(source);
??if(jspMatcher.find()) {
???String result = compressJspJs(jspMatcher.group(1));
???return (new StringBuilder(source.substring(0, jspMatcher.start(1))).append(result).append(source.substring(jspMatcher.end(1)))).toString();
??} else {
???return source;
??}
?}?
?private static String compressJavaScript(String source)? {
??//check if block is not empty
??Matcher scriptMatcher = scriptPattern.matcher(source);
??if(scriptMatcher.find()) {
???String result = compressJspJs(scriptMatcher.group(1));
???return (new StringBuilder(source.substring(0, scriptMatcher.start(1))).append(result).append(source.substring(scriptMatcher.end(1)))).toString();
??} else {
???return source;
??}
?}
??
?private static String compressCssStyles(String source)? {
??//check if block is not empty
??Matcher styleMatcher = stylePattern.matcher(source);
??if(styleMatcher.find()) {
???// 去掉注釋，換行
???String result= multiCommentPattern.matcher(styleMatcher.group(1)).replaceAll("");
???result = trimPattern.matcher(result).replaceAll("");
???result = trimPattern2.matcher(result).replaceAll("");
???return (new StringBuilder(source.substring(0, styleMatcher.start(1))).append(result).append(source.substring(styleMatcher.end(1)))).toString();
??} else {
???return source;
??}
?}
?
?private static String compressJspJs(String source){
??String result = source;
??// 因注釋符合有可能出現在字符串中，所以要先把字符串中的特殊符好去掉
??Matcher stringMatcher = stringPattern.matcher(result);
??while(stringMatcher.find()){
???String tmpStr = stringMatcher.group(0);
???
???if(tmpStr.indexOf("//") != -1 || tmpStr.indexOf("/*") != -1 || tmpStr.indexOf("*/") != -1){
????String blockStr = tmpStr.replaceAll("//", tempSingleCommentBlock).replaceAll("/\\*", tempMulitCommentBlock1)
????????.replaceAll("\\*/", tempMulitCommentBlock2);
????result = result.replace(tmpStr, blockStr);
???}
??}
??// 去掉注釋
??result = signleCommentPattern.matcher(result).replaceAll("");
??result = multiCommentPattern.matcher(result).replaceAll("");
??result = trimPattern2.matcher(result).replaceAll("");
??result = trimPattern.matcher(result).replaceAll(" ");
??// 恢復替換掉的字符串
??result = result.replaceAll(tempSingleCommentBlock, "//").replaceAll(tempMulitCommentBlock1, "/*")
????.replaceAll(tempMulitCommentBlock2, "*/");
??
??return result;
?}
}

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