文件上传之Apache commons fileupload使用
Posted 人间烟火地三鲜
tags:
篇首语：本文由小常识网(cha138.com)小编为大家整理，主要介绍了文件上传之Apache commons fileupload使用相关的知识，希望对你有一定的参考价值。
后台servlet代码：
File file1 = null,file2=null;
String description1 = null,description2 = null;
response.setCharacterEncoding("UTF-8");
request.setCharacterEncoding("UTF-8");
response.setContentType("text/html");
PrintWriter out = response.getWriter();
DiskFileUpload diskFileUpload = new DiskFileUpload();
try{
List<FileItem> list = diskFileUpload.parseRequest(request);
out.println("下面开始遍历所有的FileItem<br/><br/>");
for(FileItem fileItem : list){
if(fileItem.isFormField()){
if("description1".equals(fileItem.getFieldName())){
out.println("遍历到description1 ... 现在description1是空-----批注1---<br/><br/>");
description1 = new String(fileItem.getString().getBytes(),"UTF-8");
}
if("description2".equals(fileItem.getFieldName())){
out.println("遍历到description2 ... 现在description2是空-----批注2---<br/><br/>");
description2 = new String(fileItem.getString().getBytes(),"UTF-8");
}
} else{
if("file1".equals(fileItem.getFieldName())){
File remoteFile = new File(new String(fileItem.getName().getBytes(),"UTF-8"));
out.println("已经检测到用户上传了文件1，并且已经遍历到file1...<br/>");
out.println("客户端文件位置："+remoteFile.getAbsolutePath()+"<br/><br/>");
/*将客户端路径放到session中*/
HttpSession session = request.getSession();
session.setAttribute("clientAddress", remoteFile.getAbsolutePath());
file1 = new File(this.getServletContext().getRealPath("attachment"),remoteFile.getName());
file1.getParentFile().mkdirs();
file1.createNewFile();
InputStream ins = fileItem.getInputStream();
OutputStream ous = new FileOutputStream(file1);
try{
byte[] buffer = new byte[1024];
int len = 0;
while((len = ins.read(buffer)) > -1)
ous.write(buffer,0,len);
out.println("已经保存文件到绝对路径——"+file1.getAbsolutePath()+"<br/><br/>");
/*将绝对路径放到session中*/
session.setAttribute("JueDuiAddress", file1.getAbsolutePath());
out.println("<img src="+file1.getAbsolutePath() +" alt=‘商务小人‘/><br/><br/>");
}finally{
ous.close();
ins.close();
}
}
if("file2".equals(fileItem.getFieldName())){
File remoteFile = new File(new String(fileItem.getName().getBytes(),"UTF-8"));
out.println("已经检测到用户上传了文件2，并且已经遍历到file2...<br/><br/>");
out.println("客户端文件位置："+remoteFile.getAbsolutePath()+"<br/><br/>");
HttpSession session = request.getSession();
session.setAttribute("clientAddress", remoteFile.getAbsolutePath());
file2 = new File(this.getServletContext().getRealPath("attachment"),remoteFile.getName());
file2.getParentFile().mkdirs();
file2.createNewFile();
InputStream ins = fileItem.getInputStream();
OutputStream ous = new FileOutputStream(file2);
try{
byte[] buffer = new byte[1024];
int len = 0;
while((len = ins.read(buffer)) > -1)
ous.write(buffer,0,len);
out.println("已经保存文件到绝对路径——"+file2.getAbsolutePath()+"<br/><br/>");
/*将绝对路径放到session中*/
session.setAttribute("JueDuiAddress", file2.getAbsolutePath());
}finally{
ous.close();
ins.close();
}
}
}
out.println("Request 解析完毕<br/><br/>");
}
}
前台jsp代码：
<form action="/login/UploadSer" method="post" enctype="multipart/form-data">
<div align="center">
<fieldset style="width:80%">
<legend>上传文件</legend><br/>
<div align="left">上传文件1</div>
<div align="left">
<input type="file" name="file1"/>
</div>
<div align="left">上传文件2</div>
<div align="left">
<input type="file" name="file2"/>
</div>
<div>
<div align=‘left‘>上传文件说明1</div>
<div align=‘left‘>
<input type="text" name="description1"/>
</div>
</div>
<div>
<div align=‘left‘>上传文件说明2</div>
<div align=‘left‘>
<input type="text" name="description2"/>
</div>
</div>
<div>
<div align=‘left‘>
<input type=‘submit‘ value="上传文件"/>
</div>
</div>
</fieldset>
</div>
</form>
运行结果截图：
以上是关于文件上传之Apache commons fileupload使用的主要内容，如果未能解决你的问题，请参考以下文章
文件上传之Apache commons fileupload使用