<%@ page contentType="text/htmlcharset=GBK" %>
<% session.removeAttribute("task")%>
<jsp:useBean id="task" scope="session" class="progress.TaskBean"/>
<% task.setRunning(true)%>
<% new Thread(task).start()%>
<jsp:forward page="status.jsp"/>
状态页面:status.jsp
<%@ page contentType="text/htmlcharset=GBK" %>
<jsp:useBean id="task" scope="session" class="progress.TaskBean"/>
<HTML>
<HEAD>
<TITLE>JSP进度条</TITLE>
<% if (task.isRunning()) { %>
<script type="" LANGUAGE="JavaScript">
setTimeout("location='status.jsp'", 1000)
</script>
<% } %>
</HEAD>
<bODY bgcolor="">
<H1 ALIGN="CENTER">JSP进度条</H1>
<H2 ALIGN="CENTER">
结果: <%= task.getResult() %><BR>
<% int percent = task.getPercent()%>
<%= percent %>%
</H2>
<TABLE WIDTH="60%" ALIGN="CENTER"
CELLPADDING=0 CELLSPACING=2>
<TR>
<% for (int i = 10i <= percenti += 10) { %>
<TD WIDTH="10%" height="10" BGCOLOR="red"></TD>
<% } %>
<% for (int i = 100i >percenti -= 10) { %>
<TD WIDTH="10%"></TD>
<% } %>
</TR>
</TABLE>
<TABLE WIDTH="100%" BORDER=0 CELLPADDING=0 CELLSPACING=0>
<TR>
<TD ALIGN="CENTER">
<% if (task.isRunning()) { %>
正在执行
<% } else { %>
<% if (task.isCompleted()) { %>
完成
<% } else if (!task.isStarted()) { %>
尚未开始
<% } else { %>
已停止
<% } %>
<% } %>
</TD>
</TR>
<TR>
<TD ALIGN="CENTER">
<BR>
<% if (task.isRunning()) { %>
<FORM METHOD="GET" ACTION="stop.jsp">
<INPUT TYPE="SUBMIT" ="停止">
</FORM>
<% } else { %>
<FORM METHOD="GET" ACTION="start.jsp">
<INPUT TYPE="SUBMIT" ="开始">
</FORM>
<% } %>
</TD>
</TR>
</TABLE>
</BODY></HTML>
停止页面:stop.jsp
<%@ page contentType="text/htmlcharset=GBK" %>
<jsp:useBean id="task" scope="session" class="progress.TaskBean"/>
<% task.setRunning(false)%>
<jsp:forward page="status.jsp"/>
业务逻辑bean:TaskBean.java
package progress
import java.io.Serializable
public class TaskBean
implements Runnable, Serializable {
private int counter
private int sum
private boolean started
private boolean running
private int sleep
public TaskBean() {
counter = 0
sum = 0
started = false
running = false
sleep = 100
}
protected void work() {
try {
Thread.sleep(sleep)
counter++
sum += counter
}
catch (InterruptedException e) {
setRunning(false)
}
}
public synchronized int getPercent() {
return counter
}
public synchronized boolean isStarted() {
return started
}
public synchronized boolean isCompleted() {
return counter == 100
}
public synchronized boolean isRunning() {
return running
}
public synchronized void setRunning(boolean running) {
this.running = running
if (running) {
started = true
}
}
public synchronized Object getResult() {
if (isCompleted()) {
return new Integer(sum)
}
else {
return null
}
}
public void run() {
try {
setRunning(true)
while (isRunning() &&!isCompleted()) {
work()
}
}
finally {
setRunning(false)
}
}
}
两部分：
POI解析Excel文件是否提供接口可以取得完成的进度（百分数），没有的话也可以弄个假的，处理中每N秒+1%，结束时直接设置为100%，N根据实际处理速度调整，免得最后超过100%...
页面有很多进度条实现，百度一下就有，需要传入进度数作为参数，来展现，自己百度一下：jsProgressBarHandler (Dynamic Javascript Progress。第一个就是。
