页面代码
后台servlet代码
<form id="upForm">
请选择文件:<input type="file" name="file1"><br /> 文件描述:
<textarea cols="70" rows="5" name="desc"></textarea>
<br /> <input type="button" id="btn" value="上传">
</form>
<script type="text/javascript">
Ext.onReady(function() {
Ext.MessageBox.alert("测试", "测试Ext是否运行");
Ext.get("btn").on("click", function() {
Ext.Ajax.request({
url : "FileUpServlet",
isUpload : true,
form : "upForm",
success : function(response) {
Ext.MessageBox.alert("上传成功", response.responseText);
}
});
});
});
</script>
后台servlet代码
public class FileUpServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
public FileUpServlet() {
super();
}
@Override
public void service(ServletRequest request, ServletResponse response)
throws ServletException, IOException {
request.setCharacterEncoding("utf-8");
response.setCharacterEncoding("utf-8");
response.setContentType("text/html;charset=utf-8");
ServletContext ctx = this.getServletContext();
String userFilePath = ctx.getRealPath("userFile");
DiskFileItemFactory factory = new DiskFileItemFactory();
factory.setSizeThreshold(1024 * 1024);
factory.setRepository(new File(userFilePath));
ServletFileUpload upload = new ServletFileUpload(factory);
upload.setSizeMax(10 * 1024 * 1024);
try {
List<FileItem> fileItems = upload.parseRequest((HttpServletRequest) request);
System.out.println(fileItems.size());
Iterator<FileItem> iter = fileItems.iterator();
while (iter.hasNext()) {
FileItem fi = iter.next();
if (fi.isFormField()) {
String fieldName = fi.getFieldName();
String fieldvalue = fi.getString();
System.out.println("name:" + fieldName);
System.out.println("value:" + fieldvalue);
} else {
String filePath = fi.getName();
if (filePath != null) {
System.out.println(filePath);
}
if (StringUtil.isBlank(filePath)) {
continue;
}
String extensionName = filePath.substring(
filePath.lastIndexOf("."), filePath.length());
// String contentType = fi.getContentType();
// boolean isInMemory = fi.isInMemory();
// long sizeInBytes = fi.getSize();
String url = userFilePath +"\\"+ StringUtil.getUUID()
+ extensionName;
File uploadedFile = new File(url);
if (!uploadedFile.exists()) {
uploadedFile.getParentFile().mkdirs();
}
fi.write(uploadedFile);
}
}
PrintWriter out = response.getWriter();
out.print("创建成功");
out.flush();
out.close();
} catch (Exception e) {
e.printStackTrace();
}
}
}