如果您正在使用 jsp 开发您的网站,这是最简单的解决方案首先要从用户那里获取输入,创建一个 html 或 jsp 页面,并在您的 jsp/html 页面中包含 tis 代码
首先下载
并通过右键单击您的项目然后选择构建路径然后添加 jar 文件将此 jar 添加到您的库中
`<form role="form" action="Upload.jsp" method="post"enctype="multipart/form-data">
<div class="btn btn-success btn-file">
<i class="fa fa-cloud-upload"></i>
Browse
<input type="file" name="file" />
</div>
<button type="submit" value="submit" name='submit'>submit</button>`
</form>
enctype="multipart/form-data" 是必须的
现在创建一个名为upload.jsp的jsp(您可以使用目标jsp将图像保存到任何名称的服务器,但请记住将该名称放入上面的代码中
<%@ page import="java.io.*,java.util.*, javax.servlet.*" %>
<%@ page import="javax.servlet.http.*" %>
<%@ page import="org.apache.commons.fileupload.*" %>
<%@ page import="org.apache.commons.fileupload.disk.*" %>
<%@ page import="org.apache.commons.fileupload.servlet.*" %>
<%@ page import="org.apache.commons.io.output.*" %>
<%
String userName = (String) session.getAttribute("User");
File file ;
int maxFileSize = 5000000 * 1024;
int maxMemSize = 5000000 * 1024;
ServletContext context = pageContext.getServletContext();
String filePath = context.getInitParameter("file-upload");
// Verify the content type
String contentType = request.getContentType();
if ((contentType.indexOf("multipart/form-data") >= 0)) {
DiskFileItemFactory factory = new DiskFileItemFactory();
// maximum size that will be stored in memory
factory.setSizeThreshold(maxMemSize);
// Location to save data that is larger than maxMemSize.
factory.setRepository(new File("C:\\Users\\"));
// Create a new file upload handler
ServletFileUpload upload = new ServletFileUpload(factory);
// maximum file size to be uploaded.
upload.setSizeMax( maxFileSize );
try{
// Parse the request to get file items.
List<FileItem> fileItems = upload.parseRequest(request);
// Process the uploaded file items
Iterator i = fileItems.iterator();
while ( i.hasNext () )
{
FileItem fi = (FileItem)i.next();
if ( !fi.isFormField () )
{
// Get the uploaded file parameters
String fieldName = fi.getFieldName();
String fileName = fi.getName();
boolean isInMemory = fi.isInMemory();
long sizeInBytes = fi.getSize();
// Write the file
if( fileName.lastIndexOf("\\") >= 0 ){
file = new File( filePath +
fileName.substring( fileName.lastIndexOf("\\"))) ;
}else{
file = new File( filePath +
fileName.substring(fileName.lastIndexOf("\\")+1)) ;
}
fi.write( file ) ;
request.setAttribute("Success", "Successfully Uploaded");
RequestDispatcher rd = request.getRequestDispatcher("/UploadFiles.jsp");
rd.forward(request, response);
}
}
}catch(Exception ex) {
System.out.println(ex);
}
}else{
request.setAttribute("Error", "Error!!");
RequestDispatcher rd =request.getRequestDispatcher("/UploadFiles.jsp");
rd.forward(request, response);
}
%>
请不要感到困惑,只需复制此代码,一旦您完成此操作,我相信您会了解代码
现在你要做的最后一点是在 web.xml 中添加一些东西,如果你没有这个文件,然后创建这个......
<context-param>
<description>Location to store uploaded file</description>
<param-name>file-upload</param-name>
<param-value>
C:\\Users\\
</param-value>
</context-param>
只需将上面的代码添加到 web.xml,您就可以根据需要更改上传图片的地址(为此更改参数值)
如果您遇到任何问题,请告诉我