springmvc文件上传与下载.docx
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springmvc文件上传与下载
上传样式，中文文件名，文件名重复处理
1. [代码]action
packagecom.action;
importjava.io.File;
importjava.io.IOException;
importjava.util.HashMap;
importjava.util.Map;
importjavax.servlet.http.HttpServletRequest;
importjavax.servlet.http.HttpServletResponse;
importorg.springframework.stereotype.Controller;
importorg.springframework.web.bind.annotation.RequestMapping;
importorg.springframework.web.servlet.ModelAndView;
importcom.util.FileOperateUtil;
@Controller
@RequestMapping（value="fileOperate"）
publicclassFileOperateAction{
@RequestMapping（value="upload"）
publicStringupload（HttpServletRequestrequest）{
init（request）;
try{
FileOperateUtil.upload（request）;
request.setAttribute（"msg","ok"）;
request.setAttribute（"map",getMap（））;
}catch（Exceptione）{
e.printStackTrace（）;
}
return"redirect:
list";
}
@RequestMapping（value="list"）
publicModelAndViewlist（HttpServletRequestrequest）{
init（request）;
request.setAttribute（"map",getMap（））;
returnnewModelAndView（"fileOperate/list"）;
}
@RequestMapping（value="download"）
publicvoiddownload（HttpServletRequestrequest,HttpServletResponseresponse）{
init（request）;
try{
StringdownloadfFileName=request.getParameter（"filename"）;
downloadfFileName=newString（downloadfFileName.getBytes（"iso-8859-1"）,"utf-8"）;
StringfileName=downloadfFileName.substring（downloadfFileName.indexOf（"_"）+1）;
StringuserAgent=request.getHeader（"User-Agent"）;
byte[]bytes=userAgent.contains（"MSIE"）?
fileName.getBytes（）:
fileName.getBytes（"UTF-8"）;
fileName=newString（bytes,"ISO-8859-1"）;
response.setHeader（"Content-disposition",String.format（"attachment;filename=\"%s\"",fileName））;
FileOperateUtil.download（downloadfFileName,response.getOutputStream（））;
}catch（IOExceptione）{
e.printStackTrace（）;
}
}
privatevoidinit（HttpServletRequestrequest）{
if（FileOperateUtil.FILEDIR==null）{
FileOperateUtil.FILEDIR=request.getSession（）.getServletContext（）.getRealPath（"/"）+"file/";
}
}
privateMapgetMap（）{
Mapmap=newHashMap（）;
File[]files=newFile（FileOperateUtil.FILEDIR）.listFiles（）;
if（files!
=null）{
for（Filefile:
files）{
if（file.isDirectory（））{
File[]files2=file.listFiles（）;
if（files2!
=null）{
for（Filefile2:
files2）{
Stringname=file2.getName（）;
map.put（file2.getParentFile（）.getName（）+"/"+name,name.substring（name.lastIndexOf（"_"）+1））;
}
}
}
}
}
returnmap;
}
}
2. [代码]util
packagecom.util;
importjava.io.File;
importjava.io.FileInputStream;
importjava.io.FileNotFoundException;
importjava.io.FileOutputStream;
importjava.io.IOException;
importjava.io.InputStream;
importjava.io.OutputStream;
importjava.util.Date;
importjava.util.Iterator;
importjava.util.Map;
importjavax.servlet.ServletOutputStream;
importjavax.servlet.http.HttpServletRequest;
importorg.springframework.web.multipart.MultipartFile;
importorg.springframework.web.multipart.MultipartHttpServletRequest;
publicclassFileOperateUtil{
publicstaticStringFILEDIR=null;
/**
*上传
*@paramrequest
*@throwsIOException
*/
publicstaticvoidupload（HttpServletRequestrequest）throwsIOException{
MultipartHttpServletRequestmRequest=（MultipartHttpServletRequest）request;
MapfileMap=mRequest.getFileMap（）;
Filefile=newFile（FILEDIR）;
if（!
file.exists（））{
file.mkdir（）;
}
Iterator>it=fileMap.entrySet（）.iterator（）;
while（it.hasNext（））{
Map.Entryentry=it.next（）;
MultipartFilemFile=entry.getValue（）;
if（mFile.getSize（）!
=0&&!
"".equals（mFile.getName（）））{
write（mFile.getInputStream（）,newFileOutputStream（initFilePath（mFile.getOriginalFilename（））））;
}
}
}
privatestaticStringinitFilePath（Stringname）{
Stringdir=getFileDir（name）+"";
Filefile=newFile（FILEDIR+dir）;
if（!
file.exists（））{
file.mkdir（）;
}
Longnum=newDate（）.getTime（）;
Doubled=Math.random（）*num;
return（file.getPath（）+"/"+num+d.longValue（）+"_"+name）.replaceAll（"","-"）;
}
privatestaticintgetFileDir（Stringname）{
returnname.hashCode（）&0xf;
}
publicstaticvoiddownload（StringdownloadfFileName,ServletOutputStreamout）{
try{
FileInputStreamin=newFileInputStream（newFile（FILEDIR+"/"+downloadfFileName））;
write（in,out）;
}catch（FileNotFoundExceptione）{
try{
FileInputStreamin=newFileInputStream（newFile（FILEDIR+"/"
+newString（downloadfFileName.getBytes（"iso-8859-1"）,"utf-8"）））;
write（in,out）;
}catch（IOExceptione1）{
e1.printStackTrace（）;
}
}catch（IOExceptione）{
e.printStackTrace（）;
}
}
/**
*写入数据
*@paramin
*@paramout
*@throwsIOException
*/
publicstaticvoidwrite（InputStreamin,OutputStreamout）throwsIOException{
try{
byte[]buffer=newbyte[1024];
intbytesRead=-1;
while（（bytesRead=in.read（buffer））!
=-1）{
out.write（buffer,0,bytesRead）;
}
out.flush（）;
}finally{
try{
in.close（）;
}
catch（IOExceptionex）{
}
try{
out.close（）;
}
catch（IOExceptionex）{
}
}
}
}
3. [代码]springmvc-context.xml
xmlversion="1.0"encoding="UTF-8"?
>
//www.springframework.org/schema/beans"
xmlns:
xsi="http:
//www.w3.org/2001/XMLSchema-instance"
xmlns:
p="http:
//www.springframework.org/schema/p"
xmlns:
mvc="http:
//www.springframework.org/schema/mvc"
xmlns:
context="http:
//www.springframework.org/schema/context"
xsi:
schemaLocation="
http:
//www.springframework.org/schema/beans
http:
//www.springframework.org/schema/beans/spring-beans.xsd
http:
//www.springframework.org/schema/mvc
http:
//www.springframework.org/schema/mvc/spring-mvc.xsd
http:
//www.springframework.org/schema/context
http:
//www.springframework.org/schema/context/spring-context.xsd">
component-scanbase-package="com.action"/>
annotation-driven/>
defaultEncoding="UTF-8"/>
4. [代码]list.jsp
<%@pagelanguage="java"import="java.util.*"pageEncoding="UTF-8"contentType="text/html;charset=UTF-8" %>
<%@taglibprefix="c"uri="
<%
StringbasePath=request.getScheme（）+":
//"+request.getServerName（）+":
"+request.getServerPort（）+request.getContextPath（）+"/";
%>
DOCTYPEHTMLPUBLIC"-//W3C//DTDHTML4.01Transitional//EN">
list
a:
link{
text-decoration:
none;
}
a:
visited{
text-decoration:
none;
}
a:
hover{
color:
#999999;
text-decoration:
underline;
}
forEachitems="${map}"var="v">
fileOperate/download?
filename=${v.key}">${v.value}
forEach>
fileOperate/upload.jsp">上传文件
5. [代码]upload.jsp
<%@pagelanguage="java"import="java.util.*"pageEncoding="UTF-8"%>
<%
StringbasePath=request.getScheme（）+":
//"+request.getServerName（）+":
"+request.getServerPort（）+request.getContextPath（）+"/";
%>
DOCTYPEHTMLPUBLIC"-//W3C//DTDHTML4.01Transitional//EN">
upload
.input{
width:
80px;
height:
20px;
line-height:
20px;
background:
#0088ff;
text-align:
center;
display:
inline-block;
overflow:
hidden;
position:
relative;
text-decoration:
none;
top:
5px;
}
.input:
hover{
background:
#ff8800;
}
.file{
opacity:
0;
filter:
alpha（opacity= 0）;
font-size:
50px;
position:
absolute;
top:
0;
right:
0;
}
a:
link{
text-decoration:
none;
}
a:
visited{
text-decoration:
none;
}
a:
hover{
color:
#999999;
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