直接使用FormData提交文件悄顷圆的话,不带参数可以用下面的方法:乎茄
FormData的数据会自动组织成multipart/form-data形式的,因此不需要JQuery进行转化了,因此contentType,processData为false。
但是上面这种方法不适合带参数的,如果上传还要求带上参数的话,可以使用如下方法:
这种方法带上参数了,而文件的参数名为<input type="file"启塌 name="file">中定义的name名,要修改参数名只需要在这里name名。
ajax的表单提交只能提交data数据到后台,没法实现file文件的上传还有展示进度功能,这里用到form.js的插件来实现,搭配css样式简单易上手,而且高大上,推荐使用。
需要解释下我的结构, #upload-input-file 的input标签是真实的文件上传按钮,包裹form标签后可以实现上传功能, #upload-input-btn 的button标签是展示给用户的按钮,因为需要样式的美化。上传完成生成的文件名将会显示在 .upload-file-result 里面, .progress 是进度条的位置,先让他隐藏加上 hidden 的class, .progress-bar 是进度条的主体, .progress-bar-status 是进度条的文本提醒。
去掉hidden的class,看到的效果是这样的
[图片上传失败...(image-2c700a-1548557865446)]
将上传事件绑定在file的input里面,绑定方式就随意了。
var progress = $(".progress-bar"), status = $(".progress-bar-status"), percentVal = '0%'//上传步骤 $("#myupload").ajaxSubmit({ url: uploadUrl, type: "POST", dataType: 'json', beforeSend: function () { $(".progress").removeClass("hidden")progress.width(percentVal)status.html(percentVal)}, uploadProgress: function (event, position, total, percentComplete) { percentVal = percentComplete + '盯州%'progress.width(percentVal)status.html(percentVal)console.log(percentVal, position, total)}, success: function (result) { percentVal = '100%'链则旁progress.width(percentVal)status.html(percentVal)//获取上传文件信息 uploadFileResult.push(result)// console.log(uploadFileResult)$("棚橡.upload-file-result").html(result.name)$("#upload-input-file").val('')}, error: function (XMLHttpRequest, textStatus, errorThrown) { console.log(errorThrown)$(".upload-file-result").empty()} })
[图片上传失败...(image-3d6ae0-1548557865446)]
[图片上传失败...(image-9f0adf-1548557865446)]
更多用法可以 参考官网
/* jQuery实现文件上传,参考例子如下:package com.kinth.hddpt.file.action 源渗
import java.io.File
import java.io.FileNotFoundException
import java.io.FileOutputStream
import java.io.IOException
import java.io.InputStream
import java.io.OutputStream
import java.util.ArrayList
import java.util.Calendar
import java.util.Enumeration
import java.util.Hashtable
import java.util.List
import javax.servlet.http.HttpServletRequest
import javax.servlet.http.HttpServletResponse
import net.sf.json.JSONArray
import org.apache.commons.logging.Log
import org.apache.commons.logging.LogFactory
import org.apache.struts.action.ActionForm
import org.apache.struts.action.ActionForward
import org.apache.struts.action.ActionMapping
import org.apache.struts.upload.FormFile
import org.hibernate.criterion.MatchMode
import org.hibernate.criterion.Order
import org.hibernate.criterion.Restrictions
import com.gdcn.bpaf.common.base.search.MyCriteria
import com.gdcn.bpaf.common.base.search.MyCriteriaFactory
import com.gdcn.bpaf.common.base.service.BaseService
import com.gdcn.bpaf.common.helper.PagerList
import com.gdcn.bpaf.common.helper.WebHelper
import com.gdcn.bpaf.common.taglib.SplitPage 链陪
import com.gdcn.bpaf.security.model.LogonVO
import com.gdcn.components.appauth.common.helper.DictionaryHelper
import com.kinth.common.base.action.BaseAction
import com.kinth.hddpt.file.action.form.FileCatalogForm
import com.kinth.hddpt.file.model.FileCatalog
import com.kinth.hddpt.file.service.FileCatalogService
import com.kinth.hddpt.file.util.MyZTreeNode
/**
* <p> 棚裂蠢
* description: “文件上传的Struts层请求处理类”
* </p>
* @date : 2013-1-14
*/
public class FileCatalogAction extends BaseAction<FileCatalog> {
@SuppressWarnings("unused")
private static Log log = LogFactory.getLog(FileCatalogAction.class) // 日志记录
private FileCatalogService fileCatalogService
// 删除记录的同时删除相应文件
public ActionForward fileDelete(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response)
throws Exception {
String[] id = request.getParameterValues("resourceId")
if (id != null && id[0].contains(",")) {
id = id[0].split(",")
}
String[] fileUrls = new String[id.length]
for (int j = 0 j < id.length j++) {
fileUrls[j] = fileCatalogService.findObject(id[j]).getFileUrl()
if (!isEmpty(fileUrls[j])) {
// 如果该文件夹不存在则创建一个uptext文件夹
File fileup = new File(fileUrls[j])
if (fileup.exists() || fileup != null) {
fileup.delete()
}
}
fileCatalogService.deleteObject(id[j])
}
setAllActionInfos(request)
return list(mapping, form, request, response)
}
@Override
public ActionForward save(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response)
throws Exception {
String id = request.getParameter("resourceId")
Boolean fileFlag = Boolean.valueOf(request.getParameter("fileFlag"))
if(fileFlag != null && fileFlag == true){
return super.save(mapping, form, request, response)
}else{
String fileUrl = this.fileUpload(form, request, id, fileFlag)
response.setContentType("text/html")
response.setCharacterEncoding("GBK")
response.setHeader("Charset", "GBK")
response.setHeader("Cache-Control", "no-cache")
response.getWriter().write(fileUrl)
response.getWriter().flush()
}
return null
}
@SuppressWarnings("unchecked")
public String fileUpload(ActionForm form,HttpServletRequest request,String id,Boolean fileFlag) throws FileNotFoundException, IOException{
request.setCharacterEncoding("GBK")
String basePath = getServlet().getServletConfig().getServletContext().getRealPath("")+"/"
String filePath = "uploads/" // 获取项目根路径
/*注释部分对应jquery upload uploadify插件的后台代码,只是还存在编码问题,默认为utf-8
String savePath = getServlet().getServletConfig().getServletContext().getRealPath("") // 获取项目根路径
savePath = savePath + "\\uploads\\"
//读取上传来的文件信息
Hashtable<String, FormFile> fileHashtable = form.getMultipartRequestHandler().getFileElements()
Enumeration<String> enumeration = fileHashtable.keys()
enumeration.hasMoreElements()
String key = (String) enumeration.nextElement()
FormFile formFile = (FormFile)fileHashtable.get(key)
String filename = formFile.getFileName().trim() //文件名
filename = new EncodeChange().changeCode(filename)
String filetype = filename.substring(filename.lastIndexOf(".") + 1)//文件类型
savePath = savePath+filetype+"\\"
System.out.println("path:"+savePath)
String realPath = savePath + filename //真实文件路径
//如果该文件夹不存在则创建一个文件夹
File fileup = new File(savePath)
if(!fileup.exists()||fileup==null){
fileup.mkdirs()
}
if (!filename.equals("")) {
// 在这里上传文件
InputStream is = formFile.getInputStream()
OutputStream os = new FileOutputStream(realPath)
int bytesRead = 0
byte[] buffer = new byte[8192]
while ((bytesRead = is.read(buffer, 0, 8192)) != -1) {
os.write(buffer, 0, bytesRead)
}
os.close()
is.close()
//如果是修改 *** 作,则删除原来的文件
String id = request.getParameter("resourceId")
if (!isEmpty(id)) {
FileCatalog fileCatalog = fileCatalogService.findObject(id)
String fileUrl = fileCatalog.getFileUrl()
if (!isEmpty(fileUrl)) {
File filedel = new File(fileUrl)
if(filedel.exists()||filedel!=null){
filedel.delete()
}
}
request.setAttribute("entity", fileCatalog)
}
response.getWriter().print(realPath)// 向页面端返回结果信息
}*/
// 读取上传来的文件信息
Hashtable<String, FormFile> fileHashtable = form.getMultipartRequestHandler().getFileElements()
Enumeration<String> enumeration = fileHashtable.keys()
enumeration.hasMoreElements()
String key = (String) enumeration.nextElement()
FormFile formFile = (FormFile) fileHashtable.get(key)
String filename = formFile.getFileName().trim() // 文件名
String filetype = filename.substring(filename.lastIndexOf(".") + 1)// 文件类型
Integer fileSize = formFile.getFileSize()
filePath += Calendar.getInstance().get(Calendar.YEAR)+"/"+filetype+"/"
String realPath = basePath+filePath+filename // 真实文件路径
if (!filename.equals("")) {
// 如果是修改 *** 作,则删除原来的文件
if (!isEmpty(id)) {
FileCatalog fileCatalog = fileCatalogService.findObject(id)
String fileUrl = fileCatalog.getFileUrl()
if (!isEmpty(fileUrl)) {
fileUrl = basePath + fileUrl
File filedel = new File(fileUrl)
if (filedel.exists() || filedel != null) {
filedel.delete()
}
}
request.setAttribute("entity", fileCatalog)
}
// 如果该文件夹不存在则创建一个文件夹
File fileup = new File(basePath+filePath)
if (!fileup.exists() || fileup == null) {
fileup.mkdirs()
}
// 在这里上传文件
InputStream is = formFile.getInputStream()
OutputStream os = new FileOutputStream(realPath)
int bytesRead = 0
byte[] buffer = new byte[8192]
while ((bytesRead = is.read(buffer, 0, 8192)) != -1) {
os.write(buffer, 0, bytesRead)
}
os.close()
is.close()
}
filePath += filename
String result = "{\"fileName\":\""+filename+"\",\"fileType\":\""+filetype+"\",\"fileSize\":"+fileSize+",\"fileUrl\":\""+filePath+"\"}"
return result
}
public FileCatalogService getFileCatalogService() {
return fileCatalogService
}
public void setFileCatalogService(FileCatalogService fileCatalogService) {
this.fileCatalogService = fileCatalogService
}
}
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