客户端
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
<form action="UploadFile" enctype="multipart/form-data" method="post">
文件上传：<input type="file" name="file"><br>
<button type="submit">上传</button>
</form>
</body>
</html>
服务端
依赖servlet3.0以上版本
@WebServlet("/UploadFile")
@MultipartConfig
public class UploadFile extends HttpServlet {
private static final long serialVersionUID = 1L;
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
//获取输入字节流
request.setCharacterEncoding("UTF-8");
Part part = request.getPart("file");
InputStream input = part.getInputStream();
BufferedInputStream bis = new BufferedInputStream(input);
//判断目录是否存在
String path = request.getServletContext().getRealPath("/files");
File dir = new File(path);
if(!dir.exists()) {
dir.mkdirs();
}
//把文件保存到服务器
String fileName = part.getSubmittedFileName();
StringBuffer filePath = new StringBuffer(path).append("\\").append(fileName);
OutputStream output = new FileOutputStream(filePath.toString());
byte[] bytes = new byte[bis.available()];
bis.read(bytes);
output.write(bytes);
bis.close();
output.flush();
output.close();
System.out.println("上传成功");
response.setCharacterEncoding("UTF-8");
PrintWriter writer = response.getWriter();
writer.append("上传成功");
writer.flush();
writer.close();
}
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
doGet(request, response);
}
}
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