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
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts-config PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 1.2//EN" "http://struts./dtds/struts-config_1_2.dtd">
<struts-config>
<data-sources />
<form-beans >
<form-bean name="uploadForm" type="com.hywavesoft.struts.upload.UploadForm" />
</form-beans>
<global-exceptions />
<global-forwards />
<action-mappings >
<action
attribute="uploadForm"
input="/upload/upload.jsp"
name="uploadForm"
path="/upload"
scope="request"
type="com.hywavesoft.struts.upload.UploadAction">
<forward name="success" path="/upload/success.jsp" />
</action>
</action-mappings>
<message-resources parameter="com.hywavesoft.struts.ApplicationResources" />
</struts-config>
Upload.jsp
<%@ page language="java"%>
<%@ taglib uri="http://jakarta./struts/tags-bean" prefix="bean"%>
<%@ taglib uri="http://jakarta./struts/tags-html" prefix="html"%>
<html>
<head>
<title>JSP for uploadForm form</title>
</head>
<body>
<html:form action="/upload" method="post" enctype="multipart/form-data">
theFile : <html:file property="theFile"/><html:errors property="theFile"/><br/>
<html:submit/><html:cancel/>
<html:hidden property="command" value="save"/>
</html:form>
</body>
</html>
Success.jsp
<%@ page language="java"%>
<%@ taglib uri="http://struts./tags-bean" prefix="bean" %>
<%@ taglib uri="http://struts./tags-html" prefix="html" %>
<%@ taglib uri="http://struts./tags-logic" prefix="logic" %>
<%@ taglib uri="http://struts./tags-tiles" prefix="tiles" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html:html locale="true">
<head>
<html:base />
<title>success.jsp</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
</head>
<body>
<h1>Upload File Successful !</h1><hr>
</body>
</html:html>