文件的上传

//这个下载的程序需要一个jspsmartupload.jar包
package pro;

import javax.servlet.*;
import javax.servlet.http.*;
import javax.servlet.jsp.*;
import java.io.*;
import java.util.*;
import com.jspsmart.upload.*;

public class UploadServlet
extends HttpServlet {
private static final String CONTENT_TYPE = "text/html; charset=GBK";
//Initialize global variables
public void init() throws ServletException {
}

//Process the HTTP Post request
public void doPost(HttpServletRequest request, HttpServletResponse response) throws
ServletException, IOException {
response.setContentType(CONTENT_TYPE);
request.setCharacterEncoding("GBK");

SmartUpload mySmartUpload = new SmartUpload();
mySmartUpload.initialize(this.getServletConfig(), request, response);
mySmartUpload.setMaxFileSize(1024*1024);
try {
mySmartUpload.upload();
System.out.println("文件个数："+mySmartUpload.getFiles().getCount());
for (int i = 0; i < mySmartUpload.getFiles().getCount(); i++) {
com.jspsmart.upload.File myFile = mySmartUpload.getFiles().getFile(i);
if (!myFile.isMissing()) {//是否缺少

String myFileName = myFile.getFileName();
System.out.println("文件名字："+myFileName);
StringTokenizer st = new StringTokenizer(myFileName, ".");
String suffix = st.nextToken();
String ext = st.nextToken();
int fileSize = myFile.getSize();
System.out.println("文件大小："+fileSize);
System.out.println("文件名："+suffix);
System.out.println("后缀："+ext);
String path = getServletContext().getRealPath("/") + "upload\\";//这个很有用，以后用这个
String trace = path + myFileName;
System.out.println(trace);
myFile.saveAs(trace,mySmartUpload.SAVE_PHYSICAL);
}
}
}
catch (SmartUploadException ex) {
ex.printStackTrace();
}
catch (IOException ex) {
ex.printStackTrace();
}
catch (ServletException ex) {
ex.printStackTrace();
}

}

//Clean up resources
public void destroy() {
}
}