前端代码
注意： enctype属性
<form action="tempServlet" method="post" enctype="multipart/form-data">
file:<input type="file" name="fileName"/>
<input type="submit" name="submit" value="submit"/>
</form>
后端代码
package com.imooc.servlet;
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.annotation.MultipartConfig;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.Part;
@WebServlet("/tempServlet")
@MultipartConfig // servlet用于文件上传的注解
public class TempServlet extends HttpServlet {
@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
doPost(req, resp);
}
@Override
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
// part代表上传的文件
Part part = request.getPart("fileName");
//获取文件名称，需要在请求头中获得字符串，在截取字符串获取
String header = part.getHeader("Content-Disposition");
String fileName = header.substring(header.indexOf("filename=\"") + 10, header.lastIndexOf("\""));
// 注意：part.getName()
//返回 <input type="file" name="fileName"/> 中的fileName，而不是上传的文件的名称
String path = super.getServletContext().getRealPath("/fileupload");
System.out.println("path---->"+path);
part.write(path+"/"+fileName);
}
}
