servlet+jquery实现文件上传进度条示例代码

this.fileUploadInfo.setTotalSize(totalSize);
this.fileUploadInfo.setUploadSize(uploadSize);

}

}

上传文件的一些信息

FileUploadInfo.java

package com.fei.util; 
public class FileUploadInfo { 
  private final int K = 1024; 
  private final int M = K * 1024; 
  /**
   * 总大小
   */
  private long totalSize;
  /**
   * 开始上传时间
   */
  private long startTime = System.currentTimeMillis();
  /**
   * 已上传多少
   */
  private long uploadSize; 
  /**
   * 上传速度(K/S)
   */
  public double getUploadSpeed_K(){
    long currentTime = System.currentTimeMillis();
    long usedTime = currentTime - startTime;
    if(usedTime == 0.0){
      return 0.0;
    }
    return getUploadSize_K()/usedTime*1000d;
  }
  /**
   * 获取已上传百分比
   * @return
   */
  public double getUploadPercent(){
    return (getUploadSize()*1.00/getTotalSize())*100d;
  }
  /**
   * 剩余时间(s)
   * @return
   */
  public double getRemainTime(){
    double speedKB = getUploadSpeed_K();
    if(speedKB<= 0.00){
      return -1d;
    }
    return (getTotalSize_K() - getUploadSize_K())/speedKB;
  }
  /**
   * 已上传时间
   * @return
   */
  public double getUseTime(){
    return (System.currentTimeMillis() - startTime)/1000d;
  } 
  public long getTotalSize() {
    return totalSize;
  } 
  public double getTotalSize_K(){
    return getTotalSize()*1.0/K;
  } 
  public double getTotalSize_M(){
    return getTotalSize()*1.0/M;
  } 
  public long getUploadSize() {
    return uploadSize;
  } 
  public double getUploadSize_K(){
    return getUploadSize()/K;
  } 
  public double getUploadSize_M(){
    return getUploadSize()/M;
  } 
  public void setTotalSize(long totalSize) {
    this.totalSize = totalSize;
  } 
  public void setUploadSize(long uploadSize) {
    this.uploadSize = uploadSize;
  } 
  private String double2String(double d){
    return String.format("%.2f", d);
  } 
  public String toString(){
    return "{"+
        "'totalSize':'"+double2String(getTotalSize_M())+"M',"+
        "'uploadSize':'"+double2String(getUploadSize_M())+"M',"+
        "'uploadSpeed':'"+double2String(getUploadSpeed_K())+"KB/s',"+
        "'uploadPrecent':'"+double2String(getUploadPercent())+"',"+
        "'remainTime':'"+(getRemainTime()<0?"未知":double2String(getRemainTime()))+"s"+"',"+
        "'useTime':'"+double2String(getUseTime())+"s' "+
        "}";
  }
}

读取文件上传进度的servlet

UploadFileProgressServlet.java