Struts2上传下载

程序员文章站 2023-01-28 13:56:34

jsp页面

jsp页面
<body>
<s:fielderror></s:fielderror>
<s:form action="uploaduploadaction" enctype="multipart/form-data"
   theme="simple">
    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.day_of_month) == cal
    .get(gregoriancalendar.day_of_month);
if (isenddayofmonth_old && !isenddayofmonth_new) {
   cal.set(gregoriancalendar.date, cal
     .getactualmaximum(gregoriancalendar.day_of_month));
}
return cal.gettime();
}

public static date addday(date mydate, int amount) {
calendar cal = calendar.getinstance();
cal.settime(mydate);
cal.add(calendar.day_of_month, amount);
return cal.gettime();
}

public static date addminute(date mydate, int amount) {
calendar cal = calendar.getinstance();
cal.settime(mydate);
int minute = 0;
amount = -(amount);

if (amount > 60) {

int hour = (int) amount / 60;

if (hour * 60 > amount) {
minute = hour * 60 - amount;

cal.add(calendar.hour_of_day, -hour);
cal.add(calendar.minute, minute);

} else if (hour * 60 < amount) {

    minute = amount - hour * 60;
    cal.add(calendar.hour_of_day, -hour);
    cal.add(calendar.minute, -minute);

   } else {
    cal.add(calendar.hour_of_day, -hour);
   }

} else {

cal.add(calendar.minute, -amount);
}
return cal.gettime();
}

public static date addyear(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.year, amount);
boolean isenddayofmonth_new = cal
    .getactualmaximum(gregoriancalendar.day_of_month) == cal
    .get(gregoriancalendar.day_of_month);
if (isenddayofmonth_old && !isenddayofmonth_new) {
   cal.set(gregoriancalendar.date, cal
     .getactualmaximum(gregoriancalendar.day_of_month));
}
return cal.gettime();
}

public static int getweekday(date mydate) {
gregoriancalendar cal = new gregoriancalendar();
cal.settime(mydate);
return cal.get(gregoriancalendar.day_of_week);
}

public static int getconvertweekday(date mydate) {
int day = getweekday(mydate);
int result = day - 1;
if (result == 0)
result = 7;
return result;
}

public static int gettimefromdate(date mydate) {
simpledateformat sdf = new simpledateformat("hhmmss");
int result = integer.parseint(sdf.format(mydate));
return result;
}

public static long getdaysbetweendate(date startdate, date enddate) {
calendar cal = calendar.getinstance();
cal.settime(startdate);
cal.set(calendar.hour, 0);
cal.set(calendar.minute, 0);
cal.set(calendar.second, 0);
cal.set(calendar.millisecond, 0);
startdate = cal.gettime();
cal.settime(enddate);
cal.set(calendar.hour, 0);
cal.set(calendar.minute, 0);
cal.set(calendar.second, 0);
cal.set(calendar.millisecond, 0);
return (cal.gettime().gettime() - startdate.gettime()) / 86400000;

}

public static string strdatetime(string str) {
string idate = "";
if (str != null) {
   string[] date = str.split("-");
   if (date.length >= 3) {
    idate = date[0] + "." + date[1] + "." + date[2];
   } else {
    idate = str;
   }
}
return idate;
}

public static string strdotdatetime(string str) {
string idate = "";
if (str != null) {
   string data0 = null;
   string[] date = str.split("-");
   if (date.length >= 3) {
    if (date[0] != null) {
     data0 = date[0].substring(2, 4);
    }
    idate = data0 + "." + date[1] + "." + date[2];
   } else {
    idate = str;
   }
}
return idate;
}

public static string bakdatetime(string str) {
string idate = "";
if (str != null) {
   int l1 = str.indexof(".");
   string d1 = str.substring(0, l1);
   string s1 = str.substring(l1 + 1);
   int l2 = s1.indexof(".");
   string d2 = s1.substring(0, l2);
   string d3 = s1.substring(l2 + 1);
   idate = d1 + "-" + d2 + "-" + d3;
}
return idate;
}

public static string strshortdatetime(string str) {
string idate = "";
if (str != null) {
   string[] date = str.split("-");
   if (date.length >= 3) {
    idate = date[0] + "." + date[1] + "." + date[2];
   } else {
    idate = str;
   }
   if (idate != null && idate.length() > 9) {
    idate = idate.substring(0, 10);

}
}
return idate;
}

public static int getbetweendaynumber(string datea, string dateb) {
long daynumber = 0;
long day = 24l * 60l * 60l * 1000l;
simpledateformat df = new simpledateformat("yyyy-mm-dd");
try {
   java.util.date d1 = df.parse(datea);
   java.util.date d2 = df.parse(dateb);
   daynumber = (d2.gettime() - d1.gettime()) / day;
} catch (exception e) {
   e.printstacktrace();
}
return (int) daynumber;
}

public static void main(string[] args) {
system.out.println(nowdate());
}
}
messagefile.properties

struts.messages.error.file.too.large=\u6587\u4ef6\u8fc7\u5927
struts.messages.error.content.type.not.allowed=\u6587\u4ef6\u7c7b\u578b\u4e0d\u4e00\u81f4

struts.xml

<?xml version="1.0" encoding="utf-8" ?>
<!doctype struts public "-//apache software foundation//dtd struts configuration 2.1//en" "">
<struts>

<constant name="struts.custom.i18n.resources" value="messagefile"></constant>
<package name="hyl" extends="struts-default">

<action name="*uploadaction" class="com.hyl.action.uploadaction"
   method="{1}">
   <result name="success">/ok.</result>
   <result name="input">/index.jsp</result>
   <interceptor-ref name="fileupload">
    <param name="allowedtypes">image/jpeg</param>
    <param name="maximumsize">102400</param>
   </interceptor-ref>
   
   <interceptor-ref name="defaultstack"></interceptor-ref>
</action>

<action name="downloadaction" class="com.hyl.action.downloadaction">
   <result name="success" type="stream">
    
    <param name="contenttype">image/jpeg</param>
    
    <param name="inputname">download</param>
    <param name="contentdisposition">filename="${picname}"</param>
    <param name="buffersize">1024</param>
   </result>
</action>

</package>

</struts>

作者：hyljava

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