search
HomeWeb Front-endJS TutorialDetailed explanation of the steps for uploading files and parameters using Ajax

这次给大家带来Ajax进行文件与参数上传步奏详解,Ajax进行文件与参数上传的注意事项有哪些,下面就是实战案例,一起来看一下。

文件上传

记得前一段时间,为了研究Ajax文件上传,找了很多资料,在网上看到的大部分是form表单的方式提交文件,对于Ajax方式提交文件并且也要提交表单中其他数据,发现提及的并不是很多,后来在同事的帮助下,使用ajaxfileupload最终完成了文件上传与其他提交的操作,现在分享给大家,希望大家能有有所帮助。

操作步骤:

1 导入jar包:

我们在使用文件上传时,需要使用到两个jar包,分别是commons-io与commons-fileupload,在这里我使用的两个版本分别是2.4与1.3.1版本的,需要使用JS文件与jar包最后会发给大家一个连接(如何失效请直接我给留言,我会及时更改,谢谢)。

2 修改配置文件

当我们导入的jar包是不够的,我们需要使用到这些jar包,由于我当时使用的是SSM框架,所以我是在application-content.xml中配置一下CommonsMultipartResolver,具体配置方法如下:

<bean> 
  <property> 
   <value>104857600</value> 
  </property> 
  <property> 
   <value>4096</value> 
  </property> 
 </bean>

3 JSP文件:

大家对form表单提交问价的方式很熟悉,但是我们有很多情况下并不能直接使用form表单方式直接提交。这时候我们就需要使用Ajax方式提交,Ajax有很多的好处,比如当我们不需要刷新页面获希望进行局部刷新的时候,我们就可以使用Ajax。下面是我的表单提交的JSP页面,其中包含JS的详细步骤和HTML文件:



nbsp;html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">


<meta>
<meta>
<meta>
<title>发布资讯</title>
 <script></script>
 <script></script>
 <script> 
 function save(){
  var typeId = $("#type_span_info").attr("data-id");
   if (typeof (typeId) == "undefined") {
   $("#type_p_info").show();
   return;
  } else {
   $("#type_p_info").hide();
  }
  var title = $("#title_input_info").val();
  var summary = $("#summary_input_info").val();
  var content = $("#content_textarea_info").val();
  $.ajaxFileUpload({
   url : "${ctx}/info/doUpload",
   secureuri : false,//是否需要安全协议
   fileElementId : &#39;file&#39;,
   type : &#39;POST&#39;, //文件提交的方式
   dataType : &#39;string&#39;,
   cache : false, //是否进行页面缓存
   async : true, // 是否同步提交
   success : function(data) { 
     $.ajax({
     url : &#39;${ctx}/info/addInfo?fileUrl=&#39;+data,
     type : &#39;post&#39;,
     data:{title:title,summary:summary,content:content,typeId:typeId},
     async : false,
     success : function(result) {
      if (result == 1) { 
       $("#del_prompt_p").text("添加成功");
       fnError3();
      } else if (result == 2) {
       $("#del_prompt_p").text("添加失败")
       fnError2();
      } else {
       $("#del_prompt_p").text("系统错误");
       fnError2();
      }
     } 
    }); 
   }
   });  
 }
 </script>


<p>
 <!--页面主体 start-->
 </p><p>
  </p><p>
   </p><p>
    </p><p>
     </p><p>
      </p><p></p>
     
     <p>
      </p><p>
       </p><p>
        </p><h3>
         <span>发布资讯</span>
        </h3>
       
       <p>
        </p>
                                                                                                                                                                                                                                                                                                                                                                                        

*标题

            
                         

                         

*摘要

            

*内容

            
            

*选择行业

            

请选择行业!

             

              请选择              

             

              

                   
  • 化工
  •                
  • 装备制造
  •                
  • 生物医药
  •                
  • 电子信息
  •                
  • 其他
  •               
                          
                                                      
        
               

        

         发布         

        

         取消         

                                    

上面的代码是我在项目实际开发的过程中所用的代码,具体的CSS文件与JS文件我已经删掉了,但是不会影响具体的操作,大家使用的时候只需要把其中的class文件删掉了就可以了。好了,我们在说一说上面的代码。首先为大家解释一下ctx的作用,在我们项目开发的过程中,我们要求必须使用绝对路径,所有{ctx}是我们封装好的一个东西,就是我们的服务器地址+端口号+项目名称。当我们使用的时候,只需要引用一下文件,就是上面直接使用的,当我们用的时候直接使用${ctx}就可以,大家在使用的时候就直接使用自己的本机地址端口号与项目名称就可以。后面的/resources/new_js/jquery.js就是我们要使用的jqery.js文件的存放地址。
其实在上面的Ajax的操作中,我相当于做了两次的Ajax的提价,但是在第一次提交的时候,后台给我们返回一个参数,就是我们的文件存放路径与文件名称,在第二次提交的时候,我们将这些参数与其他参数同时上传到后台,并将这些参数保存到数据库中,以便我们使用。

* 4 后台代码:

//文件上传
@RequestMapping(value = "/doUpload", method = RequestMethod.POST, produces = "text/html; charset=UTF-8")
@ResponseBody
 public String doUpload(HttpServletRequest request, HttpServletResponse response) throws IOException {
  List<string> fileNames = null;
  if (request instanceof MultipartHttpServletRequest) {
   // process the uploaded file
   logger.info("=====进入文件类型选择=====");
   fileNames = uploadAttachment(request, "file");
  }
  String url = "";
  if (fileNames.size() > 0) {
   for (int i = 0; i  uploadAttachment(HttpServletRequest request, String type) throws IOException {
  MultipartHttpServletRequest multipartRequest = (MultipartHttpServletRequest) request;
  List<multipartfile> files = multipartRequest.getFiles(type);
  logger.info("数据长度========>>>>>>>>>>" + files.size());
  Calendar now = Calendar.getInstance();
  int year = now.get(Calendar.YEAR);
  int month = now.get(Calendar.MONTH) + 1;
  String realPath = PropertiesUtil.getProperty("realPath");
  System.err.println("realpath=====>>>>>" + realPath);
  //String savePath = request.getSession().getServletContext().getRealPath("/") + "p_image\\" + type + "\\" + year+ "\\" + month + "\\";
  String savePath = "government"+ File.separator + "image"+ File.separator + year+ File.separator + month + File.separator;
  logger.info("保存路径=====>" + savePath);
  List<string> fileNames = new ArrayList<string>();
  for (MultipartFile multipartFile : files) {
   logger.info("--" + multipartFile.getOriginalFilename());
   String fileName = multipartFile.getOriginalFilename();
   String prefix = fileName.substring(fileName.lastIndexOf(".") + 1);
   String custName = "" + System.currentTimeMillis() + "." + prefix;
   if (UsedUtil.isNotNull(fileName)) {
    File targetFile = new File(realPath+savePath, custName);
    // fileName = year+"-"+month+"-"+fileName;
    if (!targetFile.exists()) {
     targetFile.mkdirs();
     multipartFile.transferTo(targetFile);
    }
    try {
    } catch (Exception e) {
     e.printStackTrace();
    }
    fileNames.add(savePath + custName);
   }
  }
  return fileNames;
 }
//添加咨询
@RequestMapping(value = "/addInfo", method = RequestMethod.POST)
@ResponseBody
 public Integer addInfo(HttpServletRequest request, HttpServletResponse response,
   @RequestParam String fileUrl) {
  InfoBean bean = new InfoBean();
  if(UsedUtil.isNotNull(fileUrl)){
   bean.setImagePath(fileUrl);
  }
  Map<string> paramMap = ControllerUtil.request2Map(request);
  bean.setTitle((String) paramMap.get("title"));
  bean.setSummary((String) paramMap.get("summary"));
  bean.setContent((String) paramMap.get("content"));
  bean.setTypeId((String)paramMap.get("typeId"));
  return infoService.insInfo(bean);
 }</string></string></string></multipartfile></string>

在上面的代码中我们可以看到,在文件第一次上传的过程中,我们首先进入到doUpload中,然后使用uploadAttachment工具类,并将文件上传到服务器中,在上传的过程中,我首先做了一个文件唯一名称的操作,就是获取当前时间的毫秒数,虽然不能绝对保证,但是到并发量小的时候可以保证不会造成文件名称重复。然后,我将文件上传的路径的上传地址写到了.properties中,这样的好处是当我们想更换文件上传的路径时,我们就可以直接修改.properties文件,而读取.properties文件的具体方式在我的另一篇文章中讲到。最后,我们在开发的过程中,文件保存一般是保存到文件服务器中,而文件服务器一般是在Linux中,而在不同的服务器中,路径是使用斜杠还是反斜杠是不同的,所有我在这里面使用了File.separator来代替,File.separator在不同的系统中可以自动生成斜杠获反斜杠。

相信看了本文案例你已经掌握了方法,更多精彩请关注php中文网其它相关文章!

推荐阅读:

异步的文件或图片上传ajax

Why garbled characters appear when ajax passes json

The above is the detailed content of Detailed explanation of the steps for uploading files and parameters using Ajax. For more information, please follow other related articles on the PHP Chinese website!

Statement
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
The Origins of JavaScript: Exploring Its Implementation LanguageThe Origins of JavaScript: Exploring Its Implementation LanguageApr 29, 2025 am 12:51 AM

JavaScript originated in 1995 and was created by Brandon Ike, and realized the language into C. 1.C language provides high performance and system-level programming capabilities for JavaScript. 2. JavaScript's memory management and performance optimization rely on C language. 3. The cross-platform feature of C language helps JavaScript run efficiently on different operating systems.

Behind the Scenes: What Language Powers JavaScript?Behind the Scenes: What Language Powers JavaScript?Apr 28, 2025 am 12:01 AM

JavaScript runs in browsers and Node.js environments and relies on the JavaScript engine to parse and execute code. 1) Generate abstract syntax tree (AST) in the parsing stage; 2) convert AST into bytecode or machine code in the compilation stage; 3) execute the compiled code in the execution stage.

The Future of Python and JavaScript: Trends and PredictionsThe Future of Python and JavaScript: Trends and PredictionsApr 27, 2025 am 12:21 AM

The future trends of Python and JavaScript include: 1. Python will consolidate its position in the fields of scientific computing and AI, 2. JavaScript will promote the development of web technology, 3. Cross-platform development will become a hot topic, and 4. Performance optimization will be the focus. Both will continue to expand application scenarios in their respective fields and make more breakthroughs in performance.

Python vs. JavaScript: Development Environments and ToolsPython vs. JavaScript: Development Environments and ToolsApr 26, 2025 am 12:09 AM

Both Python and JavaScript's choices in development environments are important. 1) Python's development environment includes PyCharm, JupyterNotebook and Anaconda, which are suitable for data science and rapid prototyping. 2) The development environment of JavaScript includes Node.js, VSCode and Webpack, which are suitable for front-end and back-end development. Choosing the right tools according to project needs can improve development efficiency and project success rate.

Is JavaScript Written in C? Examining the EvidenceIs JavaScript Written in C? Examining the EvidenceApr 25, 2025 am 12:15 AM

Yes, the engine core of JavaScript is written in C. 1) The C language provides efficient performance and underlying control, which is suitable for the development of JavaScript engine. 2) Taking the V8 engine as an example, its core is written in C, combining the efficiency and object-oriented characteristics of C. 3) The working principle of the JavaScript engine includes parsing, compiling and execution, and the C language plays a key role in these processes.

JavaScript's Role: Making the Web Interactive and DynamicJavaScript's Role: Making the Web Interactive and DynamicApr 24, 2025 am 12:12 AM

JavaScript is at the heart of modern websites because it enhances the interactivity and dynamicity of web pages. 1) It allows to change content without refreshing the page, 2) manipulate web pages through DOMAPI, 3) support complex interactive effects such as animation and drag-and-drop, 4) optimize performance and best practices to improve user experience.

C   and JavaScript: The Connection ExplainedC and JavaScript: The Connection ExplainedApr 23, 2025 am 12:07 AM

C and JavaScript achieve interoperability through WebAssembly. 1) C code is compiled into WebAssembly module and introduced into JavaScript environment to enhance computing power. 2) In game development, C handles physics engines and graphics rendering, and JavaScript is responsible for game logic and user interface.

From Websites to Apps: The Diverse Applications of JavaScriptFrom Websites to Apps: The Diverse Applications of JavaScriptApr 22, 2025 am 12:02 AM

JavaScript is widely used in websites, mobile applications, desktop applications and server-side programming. 1) In website development, JavaScript operates DOM together with HTML and CSS to achieve dynamic effects and supports frameworks such as jQuery and React. 2) Through ReactNative and Ionic, JavaScript is used to develop cross-platform mobile applications. 3) The Electron framework enables JavaScript to build desktop applications. 4) Node.js allows JavaScript to run on the server side and supports high concurrent requests.

See all articles

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

Video Face Swap

Video Face Swap

Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Tools

SublimeText3 Linux new version

SublimeText3 Linux new version

SublimeText3 Linux latest version

SecLists

SecLists

SecLists is the ultimate security tester's companion. It is a collection of various types of lists that are frequently used during security assessments, all in one place. SecLists helps make security testing more efficient and productive by conveniently providing all the lists a security tester might need. List types include usernames, passwords, URLs, fuzzing payloads, sensitive data patterns, web shells, and more. The tester can simply pull this repository onto a new test machine and he will have access to every type of list he needs.

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use

VSCode Windows 64-bit Download

VSCode Windows 64-bit Download

A free and powerful IDE editor launched by Microsoft

PhpStorm Mac version

PhpStorm Mac version

The latest (2018.2.1) professional PHP integrated development tool