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JSP数据分页导出下载显示进度条样式

1、思路

分页数据查询，同时缓存设置进度（为当前取出数据点总数据比例）

2、界面进度条为异步请求缓存比例

3、代码

css:

body{
position:relative;
}
.mask{
position:absolute;
left:0px;
top:0px;
height:100%;
width:100%;
background-color: #eee;
display:none;
filter:alpha(opacity=50); /*IE滤镜，透明度50%*/
-moz-opacity:0.5; /*Firefox私有，透明度50%*/
opacity:0.9;/*其他，透明度50%*/
z-index:999;
}
.out{
margin:auto;
margin-top:20%;
text-align:center;
height:30px;
width:500px;
background-color: #fff;
border:1px solid red;
position:relative;
}
.in{
position:absolute;
left:-1px;
top:0px;
height:28px;
width:0px;
background-color: red;
}
.num{
position:absolute;
left:0px;
top:0px;
height:30px;
line-height:30px;
width:500px;
text-align:center;
position:relative;
}

js:

$(function(){
$(.donwload).click(function(){
var ulr = ----;
var key = new Date().getTime();
url+="?key="+key;
downloadFile(url);
process(key);
});
});
function downloadFile(url) {
try{
var elemIF = document.createElement("iframe")
elemIF.style.display = "none";
document.body.appendChild(elemIF);
elemIF.src = url;
}catch(e){
}
}
function process(key){
$.ajax({
type: 'GET',
url: ----------,
async:true,
success:function (data) {
if(data){
data = parseFloat(data).toFixed(2);
$(".in").css("width",(data/100*500)+"px");
$(".num").text(data+"%");
if(data >= 100){
setTimeout(function(){
$(".mask").hide();
}, 3000);
}else{
setTimeout(function(){
process(key);
}, 1000);
}
}
},
error:function () {
}
});
}

downaction

try{
redisTemplate.opsForValue().set("down_process_"+qm.getKey(),0.1);
int i = 0;
while(true){
qm.getPage().setNowPage(i++);
qm.getPage().setPageSize(100);
Page dbpage = 取当前页数据
List> list = (List>) dbpage.getResult();
if(list != null  list.size() > 0){
if(list.size()  100) {
redisTemplate.opsForValue().set("down_process_"+qm.getKey(), 100);
}else{
double process = i * 100.0 / dbpage.getTotalCount() * 100;
if(process  0.1)process=0.1d;
redisTemplate.opsForValue().set("down_process_"+qm.getKey(), process);
}
}
logger.info("-------value:" + redisTemplate.opsForValue().get("down_process_"+qm.getKey()));
if(list == null || list.size()  100) {
redisTemplate.opsForValue().set("down_process_"+qm.getKey(),100);
break;
}
logger.info("-------value:" + redisTemplate.opsForValue().get("down_process_"+qm.getKey()));
continue;
}
}catch(){
}finally{
redisTemplate.opsForValue().set("down_process_"+qm.getKey(),100);
redisTemplate.expire("down_process_"+qm.getKey(),5, TimeUnit.MINUTES);
}
public double process(HttpServletRequest request, HttpServletResponse response,@PathVariable(value ="key") String key) throws IOException {
Double process = 0.1d;
try{
int i = 0;
while(true) {
if(i>=2){
process = 100d;
break;
}
i++;
if (redisTemplate.opsForValue().get("down_process_"+key) == null) {
Thread.currentThread().sleep(1000l);
continue;
}else{
process = Double.valueOf(redisTemplate.opsForValue().get("down_process_"+key).toString());
break;
}
}
}catch (Exception e){
process = 0.1d;
e.printStackTrace();
}finally {
return process;
}
}

以上所述是小编给大家介绍的JSP数据分页导出下载显示进度条样式，希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对脚本之家网站的支持！

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