jsp编辑头像

<form action="upload_avatar.jsp" method="post" enctype="multipart/form-data">
    <input type="file" name="avatar" accept="image/*" required>
    <button type="submit">上传头像</button>
</form>

<%@ page import="java.io.*, java.util.*, javax.servlet.http.*, javax.servlet.annotation.*, javax.servlet.ServletException" %>
<%@ page import="org.apache.commons.fileupload.*, org.apache.commons.fileupload.disk.*, org.apache.commons.fileupload.servlet.*" %>
<%@ page import="org.apache.commons.io.output.*" %>

<%
    boolean isMultipart = ServletFileUpload.isMultipartContent(request);
    if (!isMultipart) {
        out.println("表单不是multipart/form-data类型");
        return;
    }

    // 创建文件项目工厂
    DiskFileItemFactory factory = new DiskFileItemFactory();
    // 创建文件上传处理器
    ServletFileUpload upload = new ServletFileUpload(factory);

    try {
        List<FileItem> items = upload.parseRequest(request);
        for (FileItem item : items) {
            if (!item.isFormField()) {
                String fileName = item.getName();
                String filePath = getServletContext().getRealPath("/") + "uploads/" + fileName;
                File uploadedFile = new File(filePath);
                item.write(uploadedFile);

                // 假设用户ID为1，将头像路径保存到数据库
                saveAvatarToDatabase(1, filePath);

                out.println("头像上传成功！");
            }
        }
    } catch (Exception ex) {
        out.println("上传失败：" + ex.getMessage());
    }
%>

<%!
    private void saveAvatarToDatabase(int userId, String avatarPath) {
        // 这里应该有数据库操作的代码，例如使用JDBC或ORM框架
        // 示例：假设有一个User类和一个UserDAO类来处理数据库交互
        User user = new User();
        user.setId(userId);
        user.setAvatarPath(avatarPath);
        UserDAO.update(user);
    }
%>