视频（其他）下载+tomcat 配置编码+图片上传限制大小

视频下载：
前台 jsp
function downVideo(value,row,index){
return '<a href="<%=basePath%>admin/video/video!fileDown.ds?uname='+row.uname+'&filepath='+value+'">下载</a>';
}
后台java ：
action：
public void fileDown() {
FileUtil.download(filepath, getRequest().getParameter("uname")+filepath.substring(filepath.lastIndexOf("."),filepath.length()), getResponse());
}
FileUtil：
public static void download(String filepath, String filename, HttpServletResponse response) {
response.setContentType("application/x-download;charset=utf-8");
OutputStream outp = null;
FileInputStream in = null;
try {
response.addHeader("Content-Disposition", "attachment;filename="+new String(filename.getBytes("gbk"),"ISO-8859-1"));

in = new FileInputStream(ServletActionContext.getServletContext().getRealPath("/")+filepath);
outp = response.getOutputStream();
} catch (UnsupportedEncodingException e1) {
e1.printStackTrace();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
byte[] b = new byte[1024];
int i = 0;
try {
while ((i = in.read(b, 0, 1024)) != -1) {
outp.write(b, 0, i);
outp.flush();
}

} catch (IOException e) {
e.printStackTrace();
} finally {
if (in != null) {
try {
in.close();
} catch (IOException e) {
e.printStackTrace();
}
in = null;
}
if (outp != null) {
outp = null;
}
}
}

在tomcat servlet.xml里面 第69行加上 URIEncoding="UTF-8"
<Connector port="8080" protocol="HTTP/1.1"   URIEncoding="UTF-8"
connectionTimeout="20000"
redirectPort="8443" />

<form id="financialForm" action="<%=basePath%>riskcontrol/website/review_borrow!financialUplaod.ds"  method="post"  enctype="multipart/form-data" onsubmit="return checkusertype()" >
<input type="hidden" name="usreId" value="<%=_usreId%>" />
<input type="hidden" name="borrowId" value="<%=_borrowId%>" />
<input type="file" name="image" multiple="multiple" id="financialImages"/>
<input type="submit" value="开始上传"/>
</form>

<script type="text/javascript">

function checkusertype(){
var usertype="${login_session_key.userType}";
if(!(usertype==2||usertype==11)){
alert("只有财务风控或者 总部客服可以上传复审材料");
return false;
}else{
return submitFile();
}
}
function submitFile(){
var fileArr = document.getElementById("financialImages").files;
if(fileArr.length==0){
alert('请选择上传的图片!');
return false;
}
for( var i=0;i<fileArr.length;i++){
var imageName=fileArr[i].name;
var extStart=imageName.lastIndexOf(".");
var ext=imageName.substring(extStart,imageName.length).toUpperCase();
if(ext!=".PNG"&&ext!=".JPEG"&&ext!=".JPG"&&ext!=".BMP"){
alert("图片限于PNG,JPEG,JPG,BHMP格式");
return false;
}
var filesize = fileArr[i].size/1024;
if(parseInt(filesize)>300){
alert('图片不能大于300KB');
return false;
}
//  $('#financialForm').submit();
}
}
</script>