html5实现多文件的上传示例代码
建站知识 2021-07-02 23:00www.168986.cn长沙网站建设
主要用到的是<input>的multiple属性
<input type="file" name="multipleFileUpload" multiple />
狼蚁网站SEO优化是页面的详细代码
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>Solution 4-5: Sending multiple files</title>
</head>
<body>
<form id="myForm"
action="http://10.10.25.31:8080/myupload/UploadPhotoServlet" ENCTYPE="multipart/form-data" METHOD="POST">
<input type="file" name="multipleFileUpload" multiple /> <input
type="submit" value="提交"> <input type="reset" value="重设">
</form>
</body>
</html>
java后台的详细代码
import java.io.File;
import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.List;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import .apache.mons.fileupload.FileItem;
import .apache.mons.fileupload.FileUploadException;
import .apache.mons.fileupload.disk.DiskFileItemFactory;
import .apache.mons.fileupload.servlet.ServletFileUpload;
/
Servlet implementation class UploadPhotoServlet
/
public class UploadPhotoServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
/
@see HttpServlet#HttpServlet()
/
public UploadPhotoServlet() {
super();
// TODO Auto-generated constructor stub
}
/
@see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
/
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
doPost(request,response);
}
/
@see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
/
@SuppressWarnings("unchecked")
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
String imagePath="c:\\uploadFile\\Image\\"+getEachDate()+"\\";//按日期生成文件夹
File uploadPath=new File(imagePath);
if(!uploadPath.exists()){
uploadPath.mkdirs();
}
File tmp=new File("c:\\tmp\\");
if(!tmp.exists()){
tmp.mkdirs();
}
DiskFileItemFactory factory=new DiskFileItemFactory ();//创建磁盘工厂
factory.setRepository(tmp);//设置文件缓存路径
factory.setSizeThreshold(10 1096 );//将文件保存在内存还是磁盘临时文件夹的默认临界值，值为10240，即10kb
ServletFileUpload sfu=new ServletFileUpload(factory);//创建处理工具
sfu.setSizeMax(1010241024);//服务器端可以接收的最大文件大小，-1表示无上限
String fileName=null;
try {
List<FileItem> list=sfu.parseRequest(request);//解析
if(list.size()<1){
return;
}
for(int j=0;j<list.size();j++){
FileItem item=list.get(j);
fileName=item.getName();
if(fileName.equals("")){
request.getRequestDispatcher("//visualizerPhoto.jsp").forward(request, response);
return;
}
int pos=fileName.lastIndexOf(".");//取图片文件格式
if(pos>0){
Date date=new Date();
fileName=imagePath+date.getTime()+fileName.substring(pos);
}
System.out.println("item:"+item);
item.write(new File(fileName));//写到磁盘
}
} catch (FileUploadException e) {
e.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
}
}
// 13-11-15
public static String getEachDate() {
Calendar cal = Calendar.getInstance();
cal.add(Calendar.DATE, 0);
String yesterday = new SimpleDateFormat("yyyy-MM-dd ").format(cal
.getTime());
String[] dates = yesterday.split("-");
String realDate = dates[0].substring(2, 4) + "-" + dates[1] + "-"
+ dates[2];
return realDate.trim();
}
}
狼蚁网站SEO优化是效果图
复制代码
代码如下:<input type="file" name="multipleFileUpload" multiple />
狼蚁网站SEO优化是页面的详细代码
复制代码
代码如下:<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>Solution 4-5: Sending multiple files</title>
</head>
<body>
<form id="myForm"
action="http://10.10.25.31:8080/myupload/UploadPhotoServlet" ENCTYPE="multipart/form-data" METHOD="POST">
<input type="file" name="multipleFileUpload" multiple /> <input
type="submit" value="提交"> <input type="reset" value="重设">
</form>
</body>
</html>
java后台的详细代码
复制代码
代码如下:import java.io.File;
import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.List;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import .apache.mons.fileupload.FileItem;
import .apache.mons.fileupload.FileUploadException;
import .apache.mons.fileupload.disk.DiskFileItemFactory;
import .apache.mons.fileupload.servlet.ServletFileUpload;
/
Servlet implementation class UploadPhotoServlet
/
public class UploadPhotoServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
/
@see HttpServlet#HttpServlet()
/
public UploadPhotoServlet() {
super();
// TODO Auto-generated constructor stub
}
/
@see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
/
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
doPost(request,response);
}
/
@see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
/
@SuppressWarnings("unchecked")
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
String imagePath="c:\\uploadFile\\Image\\"+getEachDate()+"\\";//按日期生成文件夹
File uploadPath=new File(imagePath);
if(!uploadPath.exists()){
uploadPath.mkdirs();
}
File tmp=new File("c:\\tmp\\");
if(!tmp.exists()){
tmp.mkdirs();
}
DiskFileItemFactory factory=new DiskFileItemFactory ();//创建磁盘工厂
factory.setRepository(tmp);//设置文件缓存路径
factory.setSizeThreshold(10 1096 );//将文件保存在内存还是磁盘临时文件夹的默认临界值，值为10240，即10kb
ServletFileUpload sfu=new ServletFileUpload(factory);//创建处理工具
sfu.setSizeMax(1010241024);//服务器端可以接收的最大文件大小，-1表示无上限
String fileName=null;
try {
List<FileItem> list=sfu.parseRequest(request);//解析
if(list.size()<1){
return;
}
for(int j=0;j<list.size();j++){
FileItem item=list.get(j);
fileName=item.getName();
if(fileName.equals("")){
request.getRequestDispatcher("//visualizerPhoto.jsp").forward(request, response);
return;
}
int pos=fileName.lastIndexOf(".");//取图片文件格式
if(pos>0){
Date date=new Date();
fileName=imagePath+date.getTime()+fileName.substring(pos);
}
System.out.println("item:"+item);
item.write(new File(fileName));//写到磁盘
}
} catch (FileUploadException e) {
e.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
}
}
// 13-11-15
public static String getEachDate() {
Calendar cal = Calendar.getInstance();
cal.add(Calendar.DATE, 0);
String yesterday = new SimpleDateFormat("yyyy-MM-dd ").format(cal
.getTime());
String[] dates = yesterday.split("-");
String realDate = dates[0].substring(2, 4) + "-" + dates[1] + "-"
+ dates[2];
return realDate.trim();
}
}
狼蚁网站SEO优化是效果图
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