如何使用fileupload工具来实现文件上传
1。需要两个夹包文件:
commons-fileupload-1.2.1.jar、
commons-io-1.4.jar
2。页面文件上传
<form action="upload" method="post" enctype="multipart/form-data"> file:<input type="file" name="file" /><br/> username:<input type="text" name="username"/><br/> <input type="submit" value="submit"/> </form> </body>
3.servlet处理页面请求;
package org.yinhe.servlet; import java.io.File; import java.io.IOException; 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; @SuppressWarnings("serial") public class UpLoadServlet extends HttpServlet { @SuppressWarnings("unchecked") public void service(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { DiskFileItemFactory factory = new DiskFileItemFactory(); ServletFileUpload upload = new ServletFileUpload(factory); try { FileItem item = null; List<FileItem> items = upload.parseRequest(request); for (int i = 0; i < items.size(); i++) { item = items.get(i); if(item.isFormField()){ //如果是普通的控件 String fileName = item.getFieldName(); String username = item.getString(); System.out.println(fileName + ":" + username); }else{ //如果是文件上传的控件,一般我们需要将 //其内容转化为一个文件,并保存到服务器上面。 //item.getName()返回的文件名:某些操作系统 //,返回的文件名包含了路径,有一些不包含。 String name = item.getName(); String name2 = name.substring(name.lastIndexOf("/")+1); System.out.println("name:"+name2); //获取保存文件的路径 //getRealPath:返回服务器的某个目录的绝对路径。 String path = this.getServletContext().getRealPath("upload"); System.out.println("path:" + path); item.write(new File(path+"/" + name2)); } } } catch (Exception e) { throw new ServletException(e.getMessage()); } response.sendRedirect("sucess.jsp"); } }
- commons-io-1.4.jar (106.5 KB)
- 下载次数: 2
- commons-fileupload-1.2.1.jar (56.4 KB)
- 下载次数: 2