我试图使这项工作。
但仍然给我错误
我还是新手
我的 .jsp 文件
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Staff Page - Add Book</title>
</head>
<body>
<center>
<h2 style="text-align: center;">Return Book Form.</h2>
<form name="uForm" method="get" action="addbookServlet" enctype="multipart/form-data">
<table align="center" width="300px" style="background-color:#f5f5f5;border:1px solid #e5e5e5; padding:5px;">
<tr><td colspan=2 align="center" height="10px"></td></tr>
<tr>
<td><b>Book ID</b></td>
<td><input type="text" name="book_id" size="50"></td>
</tr>
<tr>
<td><b>Book Title</b></td>
<td><input type="text" name="book_title" size="50"></td>
</tr>
<tr>
<td><b>Book Author</b></td>
<td><input type="text" name="book_author" size="50"></td>
</tr>
<tr>
<td><b>Book Quantity</b></td>
<td><input type="text" name="book_quantity" size="50"></td>
</tr>
<tr>
<td><b>Book Location</b></td>
<td><input type="text" name="book_location" size="50"></td>
</tr>
<tr>
<td><b>Book Image</b></td>
<td><input type="file" name="book_image" accept="image/x-png, image/gif, image/jpeg" size="50"></td>
</tr>
<tr>
<td></td>
<td><input type="submit" class="g-button" value="Submit"></td>
</tr>
<tr><td colspan=2 align="center" height="10px"></td></tr>
</table>
</form>
</center>
</body>
</html>
我的 .java 文件
package caal;
import java.io.IOException;
import java.io.InputStream;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.SQLException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.Part;
import caal.DbConnection.*;
public class AddBook extends HttpServlet {
@Override
public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
//response.setContentType("text/html");
// PrintWriter out = response.getWriter();
Connection con = null; // connection to the database
String message = null; // message will be sent back to client
// Statement stmt;
String book_id = request.getParameter("book_id");
String book_title = request.getParameter("book_title");
String book_author = request.getParameter("book_author");
String book_quantity = request.getParameter("book_quantity");
String book_location = request.getParameter("book_location");
//String book_image = request.getParameter("book_image");
InputStream inputStream = null; // input stream of the upload file
// obtains the upload file part in this multipart request
Part filePart = request.getPart("book_image");
if (filePart != null) {
// prints out some information for debugging
System.out.println(filePart.getName());
System.out.println(filePart.getSize());
System.out.println(filePart.getContentType());
// obtains input stream of the upload file
inputStream = filePart.getInputStream();
}
try {
DriverManager.registerDriver(new com.mysql.jdbc.Driver());
con = DbConnection.getConn();
String query = "INSERT INTO booktable(bookId, bookTitle, bookAuthor, bookQuantity, bookLocation, bookimage) VALUES (?,?,?,?,?,?)";
System.out.println("query " + query);
PreparedStatement statement = con.prepareStatement(query);
statement.setString(1, book_id);
statement.setString(2, book_title);
statement.setString(3, book_author);
statement.setString(4, book_quantity);
statement.setString(5, book_location);
if (inputStream != null) {
// fetches input stream of the upload file for the blob column
statement.setBlob(6, inputStream);
}
//stmt = con.createStatement();
//stmt.executeUpdate(query);
response.sendRedirect("login.jsp");
con.close();
System.out.println("Disconnected from database");
} catch (Exception e) {
e.printStackTrace();
} finally {
if (con != null) {
// closes the database connection
try {
con.close();
} catch (SQLException ex) {
ex.printStackTrace();
}
}
// sets the message in request scope
request.setAttribute("Message", message);
// forwards to the message page
getServletContext().getRequestDispatcher("/Message.jsp").forward(request, response);
}
}
}
我的 web.xml 变成错误。如果我这样说
<!-- SERVLET FOR ADD BOOK -->
<servlet>
<servlet-name>addBookServlet</servlet-name>
<servlet-class>caal.AddBook</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>addBookServlet</servlet-name>
<url-pattern>/addbookServlet</url-pattern>
</servlet-mapping>
<multipart-config>
<location>/tmp</location>
<max-file-size>20848820</max-file-size>
<max-request-size>418018841</max-request-size>
<file-size-threshold>1048576</file-size-threshold>
</multipart-config>
错误是
Error occurred during deployment: Exception while deploying the app [fpx] : org.xml.sax.SAXParseException; lineNumber: 52; columnNumber: 23; Deployment descriptor file WEB-INF/web.xml in archive [web]. cvc-complex-type.2.4.a: Invalid content was found starting with element 'multipart-config'. One of '{"http://java.sun.com/xml/ns/j2ee":description, "http://java.sun.com/xml/ns/j2ee":display-name, "http://java.sun.com/xml/ns/j2ee":icon, "http://java.sun.com/xml/ns/j2ee":distributable, "http://java.sun.com/xml/ns/j2ee":context-param, "http://java.sun.com/xml/ns/j2ee":filter, "http://java.sun.com/xml/ns/j2ee":filter-mapping, "http://java.sun.com/xml/ns/j2ee":listener, "http://java.sun.com/xml/ns/j2ee":servlet, "http://java.sun.com/xml/ns/j2ee":servlet-mapping, "http://java.sun.com/xml/ns/j2ee":session-config, "http://java.sun.com/xml/ns/j2ee":mime-mapping, "http://java.sun.com/xml/ns/j2ee":welcome-file-list, "http://java.sun.com/xml/ns/j2ee":error-page, "http://java.sun.com/xml/ns/j2ee":jsp-config, "http://java.sun.com/xml/ns/j2ee":security-constraint, "http://java.sun.com/xml/ns/j2ee":login-config, "http://java.sun.com/xml/ns/j2ee":security-role, "http://java.sun.com/xml/ns/j2ee":env-entry, "http://java.sun.com/xml/ns/j2ee":ejb-ref, "http://java.sun.com/xml/ns/j2ee":ejb-local-ref, "http://java.sun.com/xml/ns/j2ee":service-ref, "http://java.sun.com/xml/ns/j2ee":resource-ref, "http://java.sun.com/xml/ns/j2ee":resource-env-ref, "http://java.sun.com/xml/ns/j2ee":message-destination-ref, "http://java.sun.com/xml/ns/j2ee":message-destination, "http://java.sun.com/xml/ns/j2ee":locale-encoding-mapping-list}' is expected.. Please see server.log for more details.
我也尝试过使用@MultipartConfig，但它仍然无法正常工作。我需要一些帮助 。