Servlet：htm+javascript+css+servlet （ajax）实现上传（能显示进度条）
src/UploadStatus.java ，数据模型类[java]
package com.xieyuan;
public class UploadStatus {
private long bytesRead;
private long contentLength;
private int items;
private long startTime = System.currentTimeMillis();
public long getBytesRead() {
return bytesRead;
}
public void setBytesRead(long bytesRead) {
this.bytesRead = bytesRead;
}
public long getContentLength() {
return contentLength;
}
public void setContentLength(long contentLength) {
this.contentLength = contentLength;
}
public int getItems() {
return items;
}
public void setItems(int items) {
this.items = items;
}
public long getStartTime() {
return startTime;
}
public void setStartTime(long startTime) {
this.startTime = startTime;
}
}
src/UploadListener.java，继承自ProgressListener，当使用commons_uploadfile组件上传时，调用组件类的方法可添加上传监听，组件就会不断调用UploadListener的update方法
[java] view plaincopy
package com.xieyuan;
import org.apache.commons.fileupload.ProgressListener;
public class UploadListener implements ProgressListener {
private UploadStatus status;
public UploadListener(UploadStatus status) {
this.status = status;
}
public void update(long bytesRead, long contentLength, int items) {
status.setBytesRead(bytesRead);
status.setContentLength(contentLength);
status.setItems(items);
}
}
src/UploadServlet.java，该类doPost方法用于处理上传，index.jsp后台会使用XmlHttpRequest调用本Servlet的doGet方法，从session中获取最新的上传数据情况
[java]
package com.xieyuan;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.PrintWriter;
import java.util.List;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.sound.sampled.AudioFormat.Encoding;
import org.apache.commons.fileupload.DiskFileUpload;
import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;
public class UploadServlet extends HttpServlet {
//定义临时文件盒上传文件的存储路径
private File uploadTemp=null;
private File uploadPath=null;
/**
* Constructor of the object.
*/
public UploadServlet() {
super();
}
/**
* Destruction of the servlet. <br>
*/
public void destroy() {
super.destroy(); // Just puts "destroy" string in log
// Put your code here
}
/**
* The doGet method of the servlet. <br>
*
* This method is called when a form has its tag value method equals to get.
*
* @param request the request send by the client to the server
* @param response the response send by the server to the client
* @throws ServletException if an error occurred
* @throws IOException if an error occurred
*/
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
//禁用缓存,index.jsp后台会使用XmlHttpRequest调用本Servlet的doGet方法，从session中获取最新的上传数据情况
response.setHeader("Cache-Control", "no-store");
response.setHeader("Pragrma", "no-cache");
response.setDateHeader("Expires", 0);
response.setContentType("text/html;charset=utf-8");
UploadStatus status = (UploadStatus) request.getSession(true)
.getAttribute("uploadStatus");
if (status == null) {
response.getWriter().println("没有上传信息");
return;
}
long startTime = status.getStartTime();
long currentTime = System.current
补充：软件开发 , Java ,
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