龍行天下

這個問題讓我郁悶了兩三天時間,最后才發現問題是在JSP端? <html:form action="/uploadsAction"? enctype="multipart/form-data"? >
標簽如果少了"? enctype="multipart/form-data" ?服務器就會報錯,
下面把代碼貼出來.

JSP端
?<html:errors />
????????? <html:form action="/uploadsAction"? enctype="multipart/form-data"? >
??????????? <html:file property="theFile" />?
???????????? <html:radio property="upType" value="a" />CSVFileReader
???????????? <html:radio property="upType" value="b" />FileUp??????
??????????? <html:submit value="OK"? />
????????? </html:form>
FormBean中將屬性定義為FormFile,geter seter 方法依舊.
Action 中的代碼如下:實現將圖片上傳至UPLOAD文件夾內 如果文件大于20K或是寬＆高超過規定范圍的,會重新勾畫.實現對上傳圖片的控制.
當然這只是測試Action沒有跳轉頁面..

package upload;

import org.apache.struts.action.ActionMapping;
import org.apache.struts.action.ActionForm;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.Action;
import org.apache.struts.upload.*;
import java.io.IOException;
import java.awt.Image;
import java.awt.image.BufferedImage;
import com.sun.image.codec.jpeg.JPEGImageEncoder;
import com.sun.image.codec.jpeg.JPEGCodec;

import java.io.File;
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.FileOutputStream;

public class UploadAction extends Action {
??? public ActionForward execute(ActionMapping actionMapping,
???????????????????????????????? ActionForm actionForm,
???????????????????????????????? HttpServletRequest servletRequest,
???????????????????????????????? HttpServletResponse servletResponse)throws Exception {
??????? System.out.println("asdasdasdasdasdasd");
??????? UploadForm uploadForm = (UploadForm) actionForm;
??????? FormFile pic =? uploadForm.getPic();
??????? String picname = pic.getFileName();
??????? String uploadFileName = servletRequest.getSession()
??????????????????????????????? .getServletContext()
??????????????????????????????? .getRealPath("upload")+"\\"+picname;
??????? File upliadFile = new File(uploadFileName);
??????? BufferedInputStream bis = null;
??????? Image image = null;
??????? BufferedOutputStream bos = null;
??????? try{
??????? if(pic.getFileSize()<2*1024*1024){
??????? bis = new BufferedInputStream(pic.getInputStream());
??????? image = javax.imageio.ImageIO.read(bis);
??????? int width = image.getWidth(null);
??????? int height = image.getHeight(null);
??????? int w = 160;
??????? int h = 120;
??????? if(width>w||height>h){
??????? BufferedImage bi = new BufferedImage(w,h,
???????????????????????????????????????????? BufferedImage.TYPE_INT_RGB);
??????? bi.getGraphics().drawImage(image,0,0,w,h,null);
??????? bos = new BufferedOutputStream(new FileOutputStream(
???????upliadFile));
??????? JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(bos);
?????encoder.encode(bi);
??????? System.out.println(width * height);
??????? }else{
??????? bos = new BufferedOutputStream(new FileOutputStream(upliadFile));
??????? byte[] date = new byte[5*1024];
??????? int len = bis.read(date);
??????? while (len!=-1){
??????????? bos.write(date);
??????????? len = bis.read(date);
??????? }
??????? }
??????? }
???????????? return actionMapping.findForward("ok");
??????? }catch(Exception e){
??????? e.printStackTrace();
??? } finally {
??????? try {
??????????? if (bis != null)
??????????????? bis.close();
??????? } catch (IOException e1) {

??????????? e1.printStackTrace();
??????? }
??????? try {
??????????? if (bos != null)
??????????????? bos.close();
??????? } catch (IOException e2) {

??????????? e2.printStackTrace();
??????? }
??? }

??????? return actionMapping.findForward("ok");
??? }
}