2006-08-21 20:05
UploadUitl.java
/**
* 这是一个辅助类，辅助完成上传功能。
* 可以选择将文件保存在数据库里或保存在文件系统上
* 并对文件的类型和大小进行了限制
*/
package com.hywavesoft.struts.commons;
import java.io.*;
public class UploadUtil {
private static final String DATABASE_DEST = "database";
private static final String FILE_DEST = "file";
private static final int MAX_SIZE = 1024 * 1024;
private static final String[] TYPES = { ".jpg", ".gif", ".zip", ".rar" };
public static void saveFile(String fileName, byte[] fileData, int size,
String dest) throws FileNotFoundException, IOException {
if (!checkSize(size)) {
throw new IOException(size + " is too large !");
}
if (!checkType(fileName)) {
throw new IOException("Unvaildate type !");
}
if (dest.equals(DATABASE_DEST)) {
saveToDb(fileName, fileData);
}
if (dest.equals(FILE_DEST)) {
saveToFile(fileName, fileData);
}
}
private static void saveToDb(String fileName, byte[] fileData) {
}
private static void saveToFile(String fileName, byte[] fileData)
throws FileNotFoundException, IOException {
OutputStream o = new FileOutputStream(fileName);
o.write(fileData);
o.close();
}
public static void delFile(String fileName, String dest)
throws NullPointerException, SecurityException {
if (dest.equals(DATABASE_DEST)) {
delFromDb(fileName);
}
if (dest.equals(FILE_DEST)) {
delFromFile(fileName);
}
}
private static void delFromDb(String fileName) {
}
private static void delFromFile(String fileName)
throws NullPointerException, SecurityException {
File file = new File(fileName);
if (file.exists())
file.delete();
}
private static boolean checkSize(int size) {
if (size > MAX_SIZE)
return false;
return true;
}
private static boolean checkType(String fileName) {
for (int i = 0; i < TYPES.length; i++) {
if (fileName.toLowerCase().endsWith(TYPES[i])) {
return true;
}
}
return false;
}
}
UploadAction.java
/**
* org.apache.struts.upload.FormFile是Struts处理文件上传的核心组件，提供了获得
* 上传文件元数据的方法。
*/
package com.hywavesoft.struts.upload;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.upload.FormFile;
import com.hywavesoft.struts.commons.UploadUtil;
public class UploadAction extends BaseAction {
public ActionForward execute(
ActionMapping mapping,
ActionForm form,
HttpServletRequest request,
HttpServletResponse response) throws Exception {
UploadForm uploadForm = (UploadForm) form;
FormFile file = uploadForm.getTheFile();
String contentType = file.getContentType();
String fileName = file.getFileName();
int fileSize = file.getFileSize();
byte[] fileDate = file.getFileData();
String command = request.getParameter("command");
if (command.equals(SAVE)){
UploadUtil.saveFile(getPath("fileUpload")+fileName
,fileDate,fileSize,FILE_DEST);
}
if (command.equals(DELETE)){
UploadUtil.delFile(fileName,FILE_DEST);
}
file.destroy();
return mapping.findForward("success");
}
}
BaseAction.java
package com.hywavesoft.struts.upload;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
public abstract class BaseAction extends Action {
protected static final String SAVE = "save";
protected static final String DELETE = "delete";
protected static final String DATABASE_DEST = "database";
protected static final String FILE_DEST = "file";
public abstract ActionForward execute(
ActionMapping mapping,
ActionForm form,
HttpServletRequest request,
HttpServletResponse response) throws Exception;
public String getPath(String filePath){
String path = getServlet().getServletContext().getRealPath(filePath) + "\\";
return path;
}
}
UploadForm.java
package com.hywavesoft.struts.upload;
import org.apache.struts.action.ActionForm;
import org.apache.struts.upload.FormFile;
public class UploadForm extends ActionForm {
private FormFile theFile;
public FormFile getTheFile() {
return theFile;
}
public void setTheFile(FormFile theFile) {
this.theFile = theFile;
}
}
Struts-config.xml










attribute="uploadForm"
input="/upload/upload.jsp"
name="uploadForm"
path="/upload"
scope="request"
type="com.hywavesoft.struts.upload.UploadAction">





Upload.jsp
<%@ page language="java"%>
<%@ taglib uri="http://jakarta.apache.org/struts/tags-bean" prefix="bean"%>
<%@ taglib uri="http://jakarta.apache.org/struts/tags-html" prefix="html"%>






theFile :






Success.jsp
<%@ page language="java"%>
<%@ taglib uri="http://struts.apache.org/tags-bean" prefix="bean" %>
<%@ taglib uri="http://struts.apache.org/tags-html" prefix="html" %>
<%@ taglib uri="http://struts.apache.org/tags-logic" prefix="logic" %>
<%@ taglib uri="http://struts.apache.org/tags-tiles" prefix="tiles" %>

Upload File Successful !

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