Struts2上传下载

JSP页面
<body>
<s:fielderror></s:fielderror>
<s:form action="uploadUploadAction" enctype="multipart/form-data"
   theme="易做图">
    用户名：<s:textfield name="userName" />
   <br />
    密码： <s:textfield name="userPwd" />
   <br />
   <input type="file" name="file" />
   <br />
   <s:submit value="提交"></s:submit>
</s:form>
<br />
下载<a href="DownLoadAction">开始.gif</a>
</body>
UploadAction

package com.hyl.action;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import org.apache.struts2.ServletActionContext;
import com.hyl.util.DateUtil;
import com.opensymphony.xwork2.ActionSupport;

public class UploadAction extends ActionSupport {
private File file;
private String fileFileName;
private String fileContentType;
private String userName;
private String userPwd;

public String upload() throws IOException {
String path = ServletActionContext.getRequest().getRealPath("/upload");
// System.out.println(path);

InputStream is = new FileInputStream(file);
String date = DateUtil.mailDate(new java.util.Date());
// 截取的文件扩展名
String fileExtenName = fileFileName
.substring(fileFileName.indexOf('.'));
// System.out.println("截取的文件扩展名"+fileName);

File serverFile = new File(path, date + fileExtenName);

OutputStream os = new FileOutputStream(serverFile);

byte[] b = new byte[1024];

int length = 0;

while ((length = is.read(b)) > 0) {
os.write(b);

}
os.close();
is.close();
return SUCCESS;
}

public File getFile() {
return file;
}

public void setFile(File file) {
this.file = file;
}

public String getFileFileName() {
return fileFileName;
}

public void setFileFileName(String fileFileName) {
this.fileFileName = fileFileName;
}

public String getFileContentType() {
return fileContentType;
}

public void setFileContentType(String fileContentType) {
this.fileContentType = fileContentType;
}

public String getUserName() {
return userName;
}

public void setUserName(String userName) {
this.userName = userName;
}

public String getUserPwd() {
return userPwd;
}

public void setUserPwd(String userPwd) {
this.userPwd = userPwd;
}

}
DownLoadAction

package com.hyl.action;

import java.io.InputStream;
import java.io.UnsupportedEncodingException;
import org.apache.struts2.ServletActionContext;
import com.opensymphony.xwork2.ActionSupport;

public class DownLoadAction extends ActionSupport {
//下面以中文名文件实例
//此处文件名称由用户输入，此处也是动态传参的过程
private String picName = "开始.gif";

public InputStream getDownLoad() throws UnsupportedEncodingException {
//此处做一个中间变量，当重新编码后就无法识别中文名了
String rourseName=picName;
//将源文件的中文名重新编码，目的值让Struts的配置文件中能识别到，呈现给用户看
picName=new String(picName.getBytes(),"iso-8859-1");

System.out.println("/upload/"+rourseName);

return ServletActionContext.getServletContext().getResourceAsStream(
"/upload/"+rourseName);

}

public String execute() throws Exception {

return super.execute();
}

public String getPicName() {
return picName;
}

public void setPicName(String picName) {
this.picName = picName;
}

}
DateUtil

package com.hyl.util;

import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.GregorianCalendar;

public class DateUtil {

public static String dateTimeChange(Date source) {
SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
String changeTime = format.format(source);
return changeTime;
}

public static String shortDate(Date aDate) {
SimpleDateFormat formatter = new SimpleDateFormat("MM/dd/yyyy");
return formatter.format(aDate);
}

public static String nowDate() {
String iDate = "";
SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd");
String str = formatter.format(new Date());
String[] date = str.split("-");
if (date.length >= 3) {
iDate = date[0] + "/" + date[1] + "/" + date[2] + "";
} else {
iDate = str;
}
return iDate;
}

public static String mailDate(Date aDate) {
SimpleDateFormat formatter = new SimpleDateFormat("yyyyMMddHHmmssSSS");
return formatter.format(aDate);
}

public static String dateParser(Date aDate) {
SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd");
return formatter.format(aDate);
}

public static Date parser(String strDate) {
;
strDate = strDate.replace("/", "-");
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
try {
return sdf.parse(strDate);
} catch (Exception e) {
return null;
}
}

public static Date parser(String strDate, String formatter) {
SimpleDateFormat sdf = new SimpleDateFormat(formatter);
try {
return sdf.parse(strDate);
} catch (Exception e) {
return null;
}
}

public static String parser(Date date, String formatter) {
SimpleDateFormat sdf = new SimpleDateFormat(formatter);
try {
return sdf.format(date);
} catch (Exception e) {
return null;
}
}

public static Date addMonth(Date myDate, int amount) {
GregorianCalendar cal = new GregorianCalendar();
cal.setTime(myDate);
boolean isEndDayOfMonth_old = cal
    .getActualMaximum(GregorianCalendar.DAY_OF_MONTH) == cal
    .get(GregorianCalendar.DAY_OF_MONTH);
cal.add(GregorianCalendar.MONTH, amount);
boolean isEndDayOfMonth_new = cal
    .getActualMaximum(GregorianCalendar.DA

补充：Web开发 , Jsp ,