message.jsp的代碼如下：<\/p>
<%@ page language=\"java\" pageEncoding=\"UTF-8\"%>\n\n\n \n消息提示<\/title>\n <\/head>\n \n <body> <h1><a href="http://m.miracleart.cn/">国产av日韩一区二区三区精品,成人性爱视频在线观看,国产,欧美,日韩,一区,www.成色av久久成人,2222eeee成人天堂</a></h1>\n ${message}\n <\/body>\n<\/html><\/pre><p>2.2、處理文件上傳的Servlet<\/p><p>UploadHandleServlet的代碼如下：<\/p><pre class='brush:php;toolbar:false;'>package me.gacl.web.controller;\n\nimport java.io.File;\nimport java.io.FileOutputStream;\nimport java.io.IOException;\nimport java.io.InputStream;\nimport java.util.List;\nimport javax.servlet.ServletException;\nimport javax.servlet.http.HttpServlet;\nimport javax.servlet.http.HttpServletRequest;\nimport javax.servlet.http.HttpServletResponse;\nimport org.apache.commons.fileupload.FileItem;\nimport org.apache.commons.fileupload.disk.DiskFileItemFactory;\nimport org.apache.commons.fileupload.servlet.ServletFileUpload;\n\npublic class UploadHandleServlet extends HttpServlet {\n\n public void doGet(HttpServletRequest request, HttpServletResponse response)\n throws ServletException, IOException {\n \/\/得到上傳文件的保存目錄，將上傳的文件存放于WEB-INF目錄下，不允許外界直接訪問(wèn)，保證上傳文件的安全\n String savePath = this.getServletContext().getRealPath(\"\/WEB-INF\/upload\");\n File file = new File(savePath);\n \/\/判斷上傳文件的保存目錄是否存在\n if (!file.exists() && !file.isDirectory()) {\n System.out.println(savePath+\"目錄不存在，需要?jiǎng)?chuàng)建\");\n \/\/創(chuàng)建目錄\n file.mkdir();\n }\n \/\/消息提示\n String message = \"\";\n try{\n \/\/使用Apache文件上傳組件處理文件上傳步驟：\n \/\/1、創(chuàng)建一個(gè)DiskFileItemFactory工廠\n DiskFileItemFactory factory = new DiskFileItemFactory();\n \/\/2、創(chuàng)建一個(gè)文件上傳解析器\n ServletFileUpload upload = new ServletFileUpload(factory);\n \/\/解決上傳文件名的中文亂碼\n upload.setHeaderEncoding(\"UTF-8\"); \n \/\/3、判斷提交上來(lái)的數(shù)據(jù)是否是上傳表單的數(shù)據(jù)\n if(!ServletFileUpload.isMultipartContent(request)){\n \/\/按照傳統(tǒng)方式獲取數(shù)據(jù)\n return;\n }\n \/\/4、使用ServletFileUpload解析器解析上傳數(shù)據(jù)，解析結(jié)果返回的是一個(gè)List<FileItem>集合，每一個(gè)FileItem對(duì)應(yīng)一個(gè)Form表單的輸入項(xiàng)\n List<FileItem> list = upload.parseRequest(request);\n for(FileItem item : list){\n \/\/如果fileitem中封裝的是普通輸入項(xiàng)的數(shù)據(jù)\n if(item.isFormField()){\n String name = item.getFieldName();\n \/\/解決普通輸入項(xiàng)的數(shù)據(jù)的中文亂碼問(wèn)題\n String value = item.getString(\"UTF-8\");\n \/\/value = new String(value.getBytes(\"iso8859-1\"),\"UTF-8\");\n System.out.println(name + \"=\" + value);\n }else{\/\/如果fileitem中封裝的是上傳文件\n \/\/得到上傳的文件名稱，\n String filename = item.getName();\n System.out.println(filename);\n if(filename==null || filename.trim().equals(\"\")){\n continue;\n }\n \/\/注意：不同的瀏覽器提交的文件名是不一樣的，有些瀏覽器提交上來(lái)的文件名是帶有路徑的，如： c:\\a\\b\\1.txt，而有些只是單純的文件名，如：1.txt\n \/\/處理獲取到的上傳文件的文件名的路徑部分，只保留文件名部分\n filename = filename.substring(filename.lastIndexOf(\"\\\\\")+1);\n \/\/獲取item中的上傳文件的輸入流\n InputStream in = item.getInputStream();\n \/\/創(chuàng)建一個(gè)文件輸出流\n FileOutputStream out = new FileOutputStream(savePath + \"\\\\\" + filename);\n \/\/創(chuàng)建一個(gè)緩沖區(qū)\n byte buffer[] = new byte[1024];\n \/\/判斷輸入流中的數(shù)據(jù)是否已經(jīng)讀完的標(biāo)識(shí)\n int len = 0;\n \/\/循環(huán)將輸入流讀入到緩沖區(qū)當(dāng)中，(len=in.read(buffer))>0就表示in里面還有數(shù)據(jù)\n while((len=in.read(buffer))>0){\n \/\/使用FileOutputStream輸出流將緩沖區(qū)的數(shù)據(jù)寫(xiě)入到指定的目錄(savePath + \"\\\\\" + filename)當(dāng)中\(zhòng)n out.write(buffer, 0, len);\n }\n \/\/關(guān)閉輸入流\n in.close();\n \/\/關(guān)閉輸出流\n out.close();\n \/\/刪除處理文件上傳時(shí)生成的臨時(shí)文件\n item.delete();\n message = \"文件上傳成功！\";\n }\n }\n }catch (Exception e) {\n message= \"文件上傳失敗！\";\n e.printStackTrace();\n \n }\n request.setAttribute(\"message\",message);\n request.getRequestDispatcher(\"\/message.jsp\").forward(request, response);\n }\n\n public void doPost(HttpServletRequest request, HttpServletResponse response)\n throws ServletException, IOException {\n\n doGet(request, response);\n }\n}<\/pre><p>在Web.xml文件中注冊(cè)UploadHandleServlet<\/p><pre class='brush:php;toolbar:false;'><servlet>\n <servlet-name>UploadHandleServlet<\/servlet-name>\n <servlet-class>me.gacl.web.controller.UploadHandleServlet<\/servlet-class>\n<\/servlet>\n\n<servlet-mapping>\n <servlet-name>UploadHandleServlet<\/servlet-name>\n <url-pattern>\/servlet\/UploadHandleServlet<\/url-pattern>\n<\/servlet-mapping><\/pre><p>文件上傳成功之后，上傳的文件保存在了WEB-INF目錄下的upload目錄，如下圖所示：<\/p>\n<p><img src=\"https:\/\/img.php.cn\/upload\/image\/678\/158\/650\/1573530602598078.jpg\" title=\"1573530602598078.jpg\" alt=\"How to upload files in java\"><\/p>"} </script> <meta http-equiv="Cache-Control" content="no-transform" /> <meta http-equiv="Cache-Control" content="no-siteapp" /> <script>var V_PATH="/";window.onerror=function(){ return true; };</script> </head> <body data-commit-time="2023-12-28T14:50:12+08:00" class="editor_body body2_2"> <link rel="stylesheet" type="text/css" href="/static/csshw/stylehw.css"> <header> <div 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class="Article_Details_main1M"> <div id="377j5v51b" class="phpgenera_Details_mainL1"> <a href="http://m.miracleart.cn/" title="Home" class="phpgenera_Details_mainL1a">Home</a> <img src="/static/imghw/top_right.png" alt="" /> <a href="http://m.miracleart.cn/java/" class="phpgenera_Details_mainL1a">Java</a> <img src="/static/imghw/top_right.png" alt="" /> <a href="http://m.miracleart.cn/java/base/" class="phpgenera_Details_mainL1a">JavaBase</a> <img src="/static/imghw/top_right.png" alt="" /> <span>How to upload files in java</span> </div> <div id="377j5v51b" class="Articlelist_txts"> <div id="377j5v51b" class="Articlelist_txts_info"> <h1 class="Articlelist_txts_title">How to upload files in java</h1> <div id="377j5v51b" class="Articlelist_txts_info_head"> <div id="377j5v51b" class="author_info"> <a href="http://m.miracleart.cn/member/490068.html" class="author_avatar"> <img class="lazy" data-src="https://img.php.cn/upload/avatar/000/490/068/5d2bd4ed95560268.jpeg" src="/static/imghw/default1.png" alt="angryTom"> </a> <div id="377j5v51b" class="author_detail"> <a href="http://m.miracleart.cn/member/490068.html" class="author_name">angryTom</a> </div> </div> </div> <span id="377j5v51b" class="Articlelist_txts_time">Nov 12, 2019 am 11:57 AM</span> <div id="377j5v51b" class="Articlelist_txts_infos"> <span id="377j5v51b" class="Articlelist_txts_infoss on">java</span> <span id="377j5v51b" class="Articlelist_txts_infoss ">upload files</span> </div> </div> </div> <hr /> <div id="377j5v51b" class="article_main php-article"> <div id="377j5v51b" class="article-list-left detail-content-wrap content"> <ins class="adsbygoogle" style="display:block; text-align:center;" data-ad-layout="in-article" data-ad-format="fluid" data-ad-client="ca-pub-5902227090019525" data-ad-slot="3461856641"> </ins> <p>在Web應(yīng)用系統(tǒng)開(kāi)發(fā)中，文件上傳和下載功能是非常常用的功能，今天來(lái)講一下JavaWeb中的文件上傳功能的實(shí)現(xiàn)。</p> <p style="text-align: center;"><strong><img src="/static/imghw/default1.png" data-src="https://img.php.cn/upload/article/000/000/040/5dca2bf78a2aa477.jpg" class="lazy" alt="How to upload files in java" ></strong></p> <p><strong>java怎么上傳文件</strong></p> <p>對(duì)于文件上傳，瀏覽器在上傳的過(guò)程中是將文件以流的形式提交到服務(wù)器端的，如果直接使用Servlet獲取上傳文件的輸入流然后再解析里面的請(qǐng)求參數(shù)是比較麻煩，所以一般選擇采用apache的開(kāi)源工具common-fileupload這個(gè)文件上傳組件。這個(gè)common-fileupload上傳組件的jar包可以去apache官網(wǎng)上面下載，也可以在struts的lib文件夾下面找到，struts上傳的功能就是基于這個(gè)實(shí)現(xiàn)的。common-fileupload是依賴于common-io這個(gè)包的，所以還需要下載這個(gè)包。（推薦教程：<a href="http://m.miracleart.cn/java-article.html" target="_blank">java教程</a>）</p> <p><strong>一、開(kāi)發(fā)環(huán)境搭建</strong></p> <p>創(chuàng)建一個(gè)FileUploadAndDownLoad項(xiàng)目，加入Apache的commons-fileupload文件上傳組件的相關(guān)Jar包，如下圖所示：</p> <p><img src="/static/imghw/default1.png" data-src="https://img.php.cn/upload/image/722/419/214/1573530528206424.jpg" class="lazy" title="1573530528206424.jpg" alt="How to upload files in java"></p> <p><strong>二、實(shí)現(xiàn)文件上傳</strong></p> <p>2.1、文件上傳頁(yè)面和消息提示頁(yè)面</p> <p>upload.jsp頁(yè)面的代碼如下：</p><pre class='brush:php;toolbar:false;'><%@ page language="java" pageEncoding="UTF-8"%> <!DOCTYPE HTML> <html> <head> <title>文件上傳</title> </head> <body> <form action="${pageContext.request.contextPath}/servlet/UploadHandleServlet" enctype="multipart/form-data" method="post"> 上傳用戶：<input type="text" name="username"><br/> 上傳文件1：<input type="file" name="file1"><br/> 上傳文件2：<input type="file" name="file2"><br/> <input type="submit" value="提交"> </form> </body> </html></pre><p>message.jsp的代碼如下：</p><pre class='brush:php;toolbar:false;'><%@ page language="java" pageEncoding="UTF-8"%> <!DOCTYPE HTML> <html> <head> <title>消息提示</title> </head> <body> ${message} </body> </html></pre><p>2.2、處理文件上傳的Servlet</p><p>UploadHandleServlet的代碼如下：</p><pre class='brush:php;toolbar:false;'>package me.gacl.web.controller; import java.io.File; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStream; import java.util.List; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.apache.commons.fileupload.FileItem; import org.apache.commons.fileupload.disk.DiskFileItemFactory; import org.apache.commons.fileupload.servlet.ServletFileUpload; public class UploadHandleServlet extends HttpServlet { public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { //得到上傳文件的保存目錄，將上傳的文件存放于WEB-INF目錄下，不允許外界直接訪問(wèn)，保證上傳文件的安全 String savePath = this.getServletContext().getRealPath("/WEB-INF/upload"); File file = new File(savePath); //判斷上傳文件的保存目錄是否存在 if (!file.exists() && !file.isDirectory()) { System.out.println(savePath+"目錄不存在，需要?jiǎng)?chuàng)建"); //創(chuàng)建目錄 file.mkdir(); } //消息提示 String message = ""; try{ //使用Apache文件上傳組件處理文件上傳步驟： //1、創(chuàng)建一個(gè)DiskFileItemFactory工廠 DiskFileItemFactory factory = new DiskFileItemFactory(); //2、創(chuàng)建一個(gè)文件上傳解析器 ServletFileUpload upload = new ServletFileUpload(factory); //解決上傳文件名的中文亂碼 upload.setHeaderEncoding("UTF-8"); //3、判斷提交上來(lái)的數(shù)據(jù)是否是上傳表單的數(shù)據(jù) if(!ServletFileUpload.isMultipartContent(request)){ //按照傳統(tǒng)方式獲取數(shù)據(jù) return; } //4、使用ServletFileUpload解析器解析上傳數(shù)據(jù)，解析結(jié)果返回的是一個(gè)List<FileItem>集合，每一個(gè)FileItem對(duì)應(yīng)一個(gè)Form表單的輸入項(xiàng) List<FileItem> list = upload.parseRequest(request); for(FileItem item : list){ //如果fileitem中封裝的是普通輸入項(xiàng)的數(shù)據(jù) if(item.isFormField()){ String name = item.getFieldName(); //解決普通輸入項(xiàng)的數(shù)據(jù)的中文亂碼問(wèn)題 String value = item.getString("UTF-8"); //value = new String(value.getBytes("iso8859-1"),"UTF-8"); System.out.println(name + "=" + value); }else{//如果fileitem中封裝的是上傳文件 //得到上傳的文件名稱， String filename = item.getName(); System.out.println(filename); if(filename==null || filename.trim().equals("")){ continue; } //注意：不同的瀏覽器提交的文件名是不一樣的，有些瀏覽器提交上來(lái)的文件名是帶有路徑的，如： c:\a\b\1.txt，而有些只是單純的文件名，如：1.txt //處理獲取到的上傳文件的文件名的路徑部分，只保留文件名部分 filename = filename.substring(filename.lastIndexOf("\\")+1); //獲取item中的上傳文件的輸入流 InputStream in = item.getInputStream(); //創(chuàng)建一個(gè)文件輸出流 FileOutputStream out = new FileOutputStream(savePath + "\\" + filename); //創(chuàng)建一個(gè)緩沖區(qū) byte buffer[] = new byte[1024]; //判斷輸入流中的數(shù)據(jù)是否已經(jīng)讀完的標(biāo)識(shí) int len = 0; //循環(huán)將輸入流讀入到緩沖區(qū)當(dāng)中，(len=in.read(buffer))>0就表示in里面還有數(shù)據(jù) while((len=in.read(buffer))>0){ //使用FileOutputStream輸出流將緩沖區(qū)的數(shù)據(jù)寫(xiě)入到指定的目錄(savePath + "\\" + filename)當(dāng)中 out.write(buffer, 0, len); } //關(guān)閉輸入流 in.close(); //關(guān)閉輸出流 out.close(); //刪除處理文件上傳時(shí)生成的臨時(shí)文件 item.delete(); message = "文件上傳成功！"; } } }catch (Exception e) { message= "文件上傳失??！"; e.printStackTrace(); } request.setAttribute("message",message); request.getRequestDispatcher("/message.jsp").forward(request, response); } public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { doGet(request, response); } }</pre><p>在Web.xml文件中注冊(cè)UploadHandleServlet</p><pre class='brush:php;toolbar:false;'><servlet> <servlet-name>UploadHandleServlet</servlet-name> <servlet-class>me.gacl.web.controller.UploadHandleServlet</servlet-class> </servlet> <servlet-mapping> <servlet-name>UploadHandleServlet</servlet-name> <url-pattern>/servlet/UploadHandleServlet</url-pattern> </servlet-mapping></pre><p>文件上傳成功之后，上傳的文件保存在了WEB-INF目錄下的upload目錄，如下圖所示：</p> <p><img src="/static/imghw/default1.png" data-src="https://img.php.cn/upload/image/678/158/650/1573530602598078.jpg" class="lazy" title="1573530602598078.jpg" alt="How to upload files in java"></p><p>The above is the detailed content of How to upload files in java. 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Use Instant to be compatible with the old date types when necessary; date processing in modern Java should give priority to using java.timeAPI, which provides clear, immutable and linear</p> </div> <div id="377j5v51b" class="phphistorical_Version2_mids"> <a href="http://m.miracleart.cn/faq/1796857364.html" title="Comparing Java Frameworks: Spring Boot vs Quarkus vs Micronaut" class="phphistorical_Version2_mids_img"> <img onerror="this.onerror=''; this.src='/static/imghw/default1.png'" src="/static/imghw/default1.png" class="lazy" data-src="https://img.php.cn/upload/article/001/253/068/175428288147039.jpg?x-oss-process=image/resize,m_fill,h_207,w_330" alt="Comparing Java Frameworks: Spring Boot vs Quarkus vs Micronaut" /> </a> <a href="http://m.miracleart.cn/faq/1796857364.html" title="Comparing Java Frameworks: Spring Boot vs Quarkus vs Micronaut" class="phphistorical_Version2_mids_title">Comparing Java Frameworks: Spring Boot vs Quarkus vs Micronaut</a> <span id="377j5v51b" class="Articlelist_txts_time">Aug 04, 2025 pm 12:48 PM</span> <p class="Articlelist_txts_p">Pre-formanceTartuptimeMoryusage, Quarkusandmicronautleadduetocompile-Timeprocessingandgraalvsupport, Withquarkusoftenperforminglightbetterine ServerLess scenarios.2.Thyvelopecosyste,</p> </div> <div id="377j5v51b" class="phphistorical_Version2_mids"> <a href="http://m.miracleart.cn/faq/1796854044.html" title="Understanding Network Ports and Firewalls" class="phphistorical_Version2_mids_img"> <img onerror="this.onerror=''; this.src='/static/imghw/default1.png'" src="/static/imghw/default1.png" class="lazy" data-src="https://img.php.cn/upload/article/001/253/068/175400162186200.jpg?x-oss-process=image/resize,m_fill,h_207,w_330" alt="Understanding Network Ports and Firewalls" /> </a> <a href="http://m.miracleart.cn/faq/1796854044.html" title="Understanding Network Ports and Firewalls" class="phphistorical_Version2_mids_title">Understanding Network Ports and Firewalls</a> <span id="377j5v51b" class="Articlelist_txts_time">Aug 01, 2025 am 06:40 AM</span> <p class="Articlelist_txts_p">Networkportsandfirewallsworktogethertoenablecommunicationwhileensuringsecurity.1.Networkportsarevirtualendpointsnumbered0–65535,withwell-knownportslike80(HTTP),443(HTTPS),22(SSH),and25(SMTP)identifyingspecificservices.2.PortsoperateoverTCP(reliable,c</p> </div> <div id="377j5v51b" class="phphistorical_Version2_mids"> <a href="http://m.miracleart.cn/faq/1796855302.html" title="How does garbage collection work in Java?" class="phphistorical_Version2_mids_img"> <img onerror="this.onerror=''; this.src='/static/imghw/default1.png'" src="/static/imghw/default1.png" class="lazy" data-src="https://img.php.cn/upload/article/001/431/639/175411410168156.jpg?x-oss-process=image/resize,m_fill,h_207,w_330" alt="How does garbage collection work in Java?" /> </a> <a href="http://m.miracleart.cn/faq/1796855302.html" title="How does garbage collection work in Java?" class="phphistorical_Version2_mids_title">How does garbage collection work in Java?</a> <span id="377j5v51b" class="Articlelist_txts_time">Aug 02, 2025 pm 01:55 PM</span> <p class="Articlelist_txts_p">Java's garbage collection (GC) is a mechanism that automatically manages memory, which reduces the risk of memory leakage by reclaiming unreachable objects. 1.GC judges the accessibility of the object from the root object (such as stack variables, active threads, static fields, etc.), and unreachable objects are marked as garbage. 2. Based on the mark-clearing algorithm, mark all reachable objects and clear unmarked objects. 3. Adopt a generational collection strategy: the new generation (Eden, S0, S1) frequently executes MinorGC; the elderly performs less but takes longer to perform MajorGC; Metaspace stores class metadata. 4. JVM provides a variety of GC devices: SerialGC is suitable for small applications; ParallelGC improves throughput; CMS reduces</p> </div> <div id="377j5v51b" class="phphistorical_Version2_mids"> <a href="http://m.miracleart.cn/faq/1796856353.html" title="Comparing Java Build Tools: Maven vs. Gradle" class="phphistorical_Version2_mids_img"> <img onerror="this.onerror=''; this.src='/static/imghw/default1.png'" src="/static/imghw/default1.png" class="lazy" data-src="https://img.php.cn/upload/article/001/253/068/175419936190748.jpg?x-oss-process=image/resize,m_fill,h_207,w_330" alt="Comparing Java Build Tools: Maven vs. Gradle" /> </a> <a href="http://m.miracleart.cn/faq/1796856353.html" title="Comparing Java Build Tools: Maven vs. Gradle" class="phphistorical_Version2_mids_title">Comparing Java Build Tools: Maven vs. Gradle</a> <span id="377j5v51b" class="Articlelist_txts_time">Aug 03, 2025 pm 01:36 PM</span> <p class="Articlelist_txts_p">Gradleisthebetterchoiceformostnewprojectsduetoitssuperiorflexibility,performance,andmoderntoolingsupport.1.Gradle’sGroovy/KotlinDSLismoreconciseandexpressivethanMaven’sverboseXML.2.GradleoutperformsMaveninbuildspeedwithincrementalcompilation,buildcac</p> </div> <div id="377j5v51b" class="phphistorical_Version2_mids"> <a href="http://m.miracleart.cn/faq/1796854866.html" title="go by example defer statement explained" class="phphistorical_Version2_mids_img"> <img onerror="this.onerror=''; this.src='/static/imghw/default1.png'" src="/static/imghw/default1.png" class="lazy" data-src="https://img.php.cn/upload/article/001/431/639/175408716181970.jpg?x-oss-process=image/resize,m_fill,h_207,w_330" alt="go by example defer statement explained" /> </a> <a href="http://m.miracleart.cn/faq/1796854866.html" title="go by example defer statement explained" class="phphistorical_Version2_mids_title">go by example defer statement explained</a> <span id="377j5v51b" class="Articlelist_txts_time">Aug 02, 2025 am 06:26 AM</span> <p class="Articlelist_txts_p">defer is used to perform specified operations before the function returns, such as cleaning resources; parameters are evaluated immediately when defer, and the functions are executed in the order of last-in-first-out (LIFO); 1. Multiple defers are executed in reverse order of declarations; 2. Commonly used for secure cleaning such as file closing; 3. The named return value can be modified; 4. It will be executed even if panic occurs, suitable for recovery; 5. Avoid abuse of defer in loops to prevent resource leakage; correct use can improve code security and readability.</p> </div> <div id="377j5v51b" class="phphistorical_Version2_mids"> <a href="http://m.miracleart.cn/faq/1796856207.html" title="Using HTML `input` Types for User Data" class="phphistorical_Version2_mids_img"> <img onerror="this.onerror=''; this.src='/static/imghw/default1.png'" src="/static/imghw/default1.png" class="lazy" data-src="https://img.php.cn/upload/article/001/253/068/175419042277781.jpg?x-oss-process=image/resize,m_fill,h_207,w_330" alt="Using HTML `input` Types for User Data" /> </a> <a href="http://m.miracleart.cn/faq/1796856207.html" title="Using HTML `input` Types for User Data" class="phphistorical_Version2_mids_title">Using HTML `input` Types for User Data</a> <span id="377j5v51b" class="Articlelist_txts_time">Aug 03, 2025 am 11:07 AM</span> <p class="Articlelist_txts_p">Choosing the right HTMLinput type can improve data accuracy, enhance user experience, and improve usability. 1. Select the corresponding input types according to the data type, such as text, email, tel, number and date, which can automatically checksum and adapt to the keyboard; 2. Use HTML5 to add new types such as url, color, range and search, which can provide a more intuitive interaction method; 3. Use placeholder and required attributes to improve the efficiency and accuracy of form filling, but it should be noted that placeholder cannot replace label.</p> </div> </div> <a href="http://m.miracleart.cn/java/" class="phpgenera_Details_mainL4_botton"> <span>See all articles</span> <img src="/static/imghw/down_right.png" alt="" /> </a> </div> </div> </div> </main> <footer> <div id="377j5v51b" class="footer"> <div id="377j5v51b" class="footertop"> <img src="/static/imghw/logo.png" alt=""> <p>Public welfare online PHP training，Help PHP learners grow quickly！</p> </div> <div id="377j5v51b" class="footermid"> <a href="http://m.miracleart.cn/about/us.html">About us</a> <a href="http://m.miracleart.cn/about/disclaimer.html">Disclaimer</a> <a href="http://m.miracleart.cn/update/article_0_1.html">Sitemap</a> </div> <div id="377j5v51b" class="footerbottom"> <p> ? php.cn All rights reserved </p> </div> </div> </footer> <input type="hidden" id="verifycode" value="/captcha.html"> <link 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