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package com.demo;import java.io.File;import java.io.FileNotFoundException;import java.io.FileOutputStream;import java.io.IOException;import java.io.InputStream;import org.apache.commons.io.FileUtils;import org.apache.commons.io.IOUtils;import com.aspose.pdf.Document;import com.aspose.pdf.HtmlSaveOptions;import com.aspose.pdf.HtmlSaveOptions.CssSavingInfo;import com.aspose.pdf.HtmlSaveOptions.CssSavingStrategy;import com.aspose.pdf.HtmlSaveOptions.CssUrlMakingStrategy;import com.aspose.pdf.HtmlSaveOptions.CssUrlRequestInfo;import com.aspose.pdf.HtmlSaveOptions.ResourceSavingStrategy;import com.aspose.pdf.License;import com.aspose.pdf.SaveOptions.ResourceSavingInfo;/** * * 由于ASPOSE比较吃内存,操作大一点的文件就会堆溢出,所以请先设置好java虚拟机参数:-Xms1024m -Xmx1024m(参kao值)<br> * * @author Spark * */public class TestPdf { private static InputStream license; private static InputStream pdf; /** * 获取license * * @return */ public static boolean getLicense() { boolean result = false; try { license = TestPdf.class.getClassLoader().getResourceAsStream("\\license.xml");// license路径 pdf = TestPdf.class.getClassLoader().getResourceAsStream("\\人人都是产品经理.pdf");// 原始pdf路径 License aposeLic = new License(); aposeLic.setLicense(license); result = true; } catch (Exception e) { e.printStackTrace(); } return result; } /** * * @param args */ public static void main(String[] args) { // 验证License if (!getLicense()) { return; } try { long old = System.currentTimeMillis(); Document pdfDocument = new Document(pdf); File file = new File("D:\\d\\test.html");// 输出路径 FileOutputStream fileOS = new FileOutputStream(file); HtmlSaveOptions options = new HtmlSaveOptions(); options.CustomResourceSavingStrategy = new ResourceSavingStrategy() { @Override public String invoke(ResourceSavingInfo arg0) { try { File file = new File("D:\\d\\"+arg0.SupposedFileName);// 输出路径 byte[] b =IOUtils.toByteArray(arg0.ContentStream.toInputStream()); FileOutputStream fileOS = new FileOutputStream(file); fileOS.write(b); } catch (FileNotFoundException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } return arg0.SupposedFileName; } }; options.CustomCssSavingStrategy = new CssSavingStrategy() { @Override public void invoke(CssSavingInfo arg0) { try { File file = new File(arg0.SupposedURL);// 输出路径 byte[] b =IOUtils.toByteArray(arg0.ContentStream.toInputStream()); FileOutputStream fileOS = new FileOutputStream(file); fileOS.write(b); } catch (FileNotFoundException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } }; options.CustomStrategyOfCssUrlCreation = new CssUrlMakingStrategy() { @Override public String invoke(CssUrlRequestInfo arg0) { return "D:\\d\\test.css"; } }; pdfDocument.save(fileOS, options); long now = System.currentTimeMillis(); System.out.println("共耗时:" + ((now - old) / 1000.0) + "秒\n\n" + "文件保存在:" + file.getPath()); } catch (Exception e) { e.printStackTrace(); } }}

The roles of HTML, CSS and JavaScript in web development are: 1. HTML is used to build web page structure; 2. CSS is used to beautify the appearance of web pages; 3. JavaScript is used to achieve dynamic interaction. Through tags, styles and scripts, these three together build the core functions of modern web pages.

Setting the lang attributes of a tag is a key step in optimizing web accessibility and SEO. 1) Set the lang attribute in the tag, such as. 2) In multilingual content, set lang attributes for different language parts, such as. 3) Use language codes that comply with ISO639-1 standards, such as "en", "fr", "zh", etc. Correctly setting the lang attribute can improve the accessibility of web pages and search engine rankings.

HTMLattributesareessentialforenhancingwebelements'functionalityandappearance.Theyaddinformationtodefinebehavior,appearance,andinteraction,makingwebsitesinteractive,responsive,andvisuallyappealing.Attributeslikesrc,href,class,type,anddisabledtransform

TocreatealistinHTML,useforunorderedlistsandfororderedlists:1)Forunorderedlists,wrapitemsinanduseforeachitem,renderingasabulletedlist.2)Fororderedlists,useandfornumberedlists,customizablewiththetypeattributefordifferentnumberingstyles.

HTML is used to build websites with clear structure. 1) Use tags such as, and define the website structure. 2) Examples show the structure of blogs and e-commerce websites. 3) Avoid common mistakes such as incorrect label nesting. 4) Optimize performance by reducing HTTP requests and using semantic tags.

ToinsertanimageintoanHTMLpage,usethetagwithsrcandaltattributes.1)UsealttextforaccessibilityandSEO.2)Implementsrcsetforresponsiveimages.3)Applylazyloadingwithloading="lazy"tooptimizeperformance.4)OptimizeimagesusingtoolslikeImageOptimtoreduc

The core purpose of HTML is to enable the browser to understand and display web content. 1. HTML defines the web page structure and content through tags, such as, to, etc. 2. HTML5 enhances multimedia support and introduces and tags. 3.HTML provides form elements to support user interaction. 4. Optimizing HTML code can improve web page performance, such as reducing HTTP requests and compressing HTML.

HTMLtagsareessentialforwebdevelopmentastheystructureandenhancewebpages.1)Theydefinelayout,semantics,andinteractivity.2)SemantictagsimproveaccessibilityandSEO.3)Properuseoftagscanoptimizeperformanceandensurecross-browsercompatibility.


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