struts2 + spring action中文件上传和下载
文件上传：
1、保存到Tomcat中
public String uploadFile() throws Exception{
String abslutePath = ServletActionContext.getServletContext().getRealPath(savePath); //读取struts配置文件中的路径
File targetPath = new File(abslutePath);
if(!targetPath.exists()){
targetPath.mkdirs();
}
String newFileName = createFileName();
String targetFile = abslutePath + "\\" + newFileName;
FileInputStream fis = new FileInputStream(headicon);
FileOutputStream fos = new FileOutputStream(targetFile);
byte[] bytes = new byte[1024];
int n;
while((n=fis.read(bytes)) != -1){
fos.write(bytes, 0, n);
}
fis.close();
fos.close();
user.setHeadicon(savePath+"/"+newFileName);
getResponse().setContentType("text/html;charset=UTF-8");
getResponse().setCharacterEncoding("UTF-8");
java.io.PrintWriter out = getResponse().getWriter();
out.println("<script language='javascript'>");
out.println("window.alert('修改成功！');");
out.println("window.location.href = 'individualCenterAction_load.action';");
out.println("</script>");
out.flush();
out.close();
return null;
}
private String createFileName(){
String extension = headiconFileName.substring(headiconFileName.lastIndexOf("."));
return user.getLoginname()+extension;
}
2、保存到本地磁盘中（推荐此种做法）
public String uploadFile() throws Exception{
File targetPath = new File(savePath);
if(!targetPath.exists()){
targetPath.mkdirs();
}
FileInputStream fi = new FileInputStream(headicon);
FileOutputStream fo = new FileOutputStream(targetPath+"\\"+createFileName());
byte[] bytes = new byte[1024];
int n = -1;
while((n = fi.read(bytes)) != -1){
fo.write(bytes,0,n);
}
fi.close();
fo.close();
getRequest().setAttribute("tips", "true");
return load();
}
private String createFileName(){
String extension = headiconFileName.substring(headiconFileName.lastIndexOf("."));
return user.getLoginname()+extension;
}
文件下载：
public String downloadFile() throws IOException{
HttpServletResponse response = getResponse();
String photoPath = savePath+"\\"+user.getHeadicon();
File file = new File(photoPath);
// 取得文件名。
String filename = file.getName();
// 取得文件的后缀名。
//String ext = filename.substring(filename.lastIndexOf(".") + 1).toUpperCase();
// 以流的形式下载文件。
InputStream fis = new BufferedInputStream(new FileInputStream(file));
byte[] buffer = new byte[fis.available()];
fis.read(buffer);
fis.close();
// 清空response
response.reset();
// 设置response的Header
response.addHeader("Content-Disposition", "attachment;filename=" + new String(filename.getBytes("utf-8"),"ISO-8859-1"));
response.addHeader("Content-Length", "" + file.length());
OutputStream toClient = new BufferedOutputStream(response.getOutputStream());
response.setContentType("image/gif");
toClient.write(buffer);
toClient.flush();
toClient.close();
return null;
}
补充（未完善）：
public void test() {
File file = new File();
Date uplodDate = new Date();
String year = new SimpleDateFormat("yyyy").format(uploadDate);
String month = new SimpleDateFormat("MM").format(uploadDate);
String day = new SimpleDateFormat("dd").format(day);
file.getName();
File newFile = new File(uploadPath + "\\" + year + "\\" + month + "\\" + day + "\\" + file.getName());
FileWriter fw = new FileWriter(newFile);
FileReader fr = new FileReader(file);
BufferedReader br = new BufferedReader(fr);
String str = null;
while ((str = br.readLine()) != null) {
fw.write(str);
}
uploadPath
}
show{
}
校验补充：
//剔除两边空格
function trim(str){
var regLeft = /^\s+/;
var regRight = /\s+$/;
return str.replace(regLeft,"").replace(regRight,"");
}
function checkForm(){
var uploadFile = document.getElementById("upload").value;
if(trim(uploadFile).length == 0){
if(!confirm("确定不更新头像图片？")){
return false;
}
}
//判断是否是图片 - strFilter必须是小写列举
var alltypes = ".gif";
var objtype = uploadFile.substring(uploadFile.lastIndexOf(".")).toLowerCase();
if(alltypes.indexOf(objtype) < 0){
alert("请选择gif格式文件！");
return false;
}
return true;
}
input type="file" name="headicon" id="upload"/>