servlet如何处理html form表单上传文件的同时传入的参数

之前从来没有用servlet处理过，毕竟现在都多数用的struts2或者spring mvc，很少用原生态的servlet写了

最近做一个企业认证平台，交给我了，嗯，正好巩固下之前的知识。废话不多说。

我本人的用的maven 需要用的jar如下：

<dependency>
<groupId>commons-fileupload</groupId>
<artifactId>commons-fileupload</artifactId>
<version>1.3.2</version>
</dependency>
<dependency>
<groupId>commons-io</groupId>
<artifactId>commons-io</artifactId>
<version>2.5</version>
</dependency>

关键代码

Object registerMobilePhone = request.getSession().getAttribute("registerMobilePhone");
if (registerMobilePhone == null) {
response.sendRedirect("register_first.html?code=000");// 用户验证已过期
return;
}
RegisterService registerService = new RegisterService();
Companyregister companyregister = new Companyregister();
// 检测是否为多媒体上传
if (!ServletFileUpload.isMultipartContent(request)) {
// 如果不是则停止
PrintWriter writer = response.getWriter();
writer.println("Error: 表单必须包含 enctype=multipart/form-data");
writer.flush();
return;
}
// 配置上传参数
DiskFileItemFactory factory = new DiskFileItemFactory();
// 设置内存临界值 - 超过后将产生临时文件并存储于临时目录中
factory.setSizeThreshold(MEMORY_THRESHOLD);
// 设置临时存储目录
factory.setRepository(new File(System.getProperty("java.io.tmpdir")));

ServletFileUpload upload = new ServletFileUpload(factory);
upload.setHeaderEncoding("UTF-8");
// 设置最大文件上传值
upload.setFileSizeMax(MAX_FILE_SIZE);

// 设置最大请求值 (包含文件和表单数据)
upload.setSizeMax(MAX_REQUEST_SIZE);

// 构造临时路径来存储上传的文件
// 这个路径相对当前应用的目录
String uploadPath = getServletContext().getRealPath("./") + File.separator + UPLOAD_DIRECTORY;
// 如果目录不存在则创建
File uploadDir = new File(uploadPath);
if (!uploadDir.exists()) {
uploadDir.mkdir();
}
try {
// 解析请求的内容提取文件数据
List<FileItem> formItems = upload.parseRequest(request);
if (formItems != null && formItems.size() > 0) {
for (FileItem item : formItems) {
log.info("参数名" + item.getFieldName());
// 处理不在表单中的字段
if (!item.isFormField() && item.getSize() != -1) {
String extName = getExtName(new File(item.getName()).getName(), '.');
String fileName = (String) registerMobilePhone;
if (item.getFieldName().equals("otherfile")) {
fileName += "otherfile" + extName;
companyregister.setOtherfilepath(fileName);
} else if (item.getFieldName().equals("organizationcodefile")) {
fileName += "organizationcodefile" + extName;
companyregister.setOrganizationcodefilepath(fileName);
} else {
fileName += "bussreglicensefile" + extName;
companyregister.setOrganizationcodefilepath(fileName);
}
String filePath = uploadPath + File.separator + fileName;
File storeFile = new File(filePath);
log.info("filePath》》" + filePath);
// 保存文件到硬盘
item.write(storeFile);
log.info("fileName 》》" + fileName);
} else {
if (!StringUtil.isEmpty(item.getString())) {
try {
if ("enterprisescale".equals(item.getFieldName())) {
ReflectionUtils.setFieldValue(companyregister, item.getFieldName(),
Integer.valueOf(item.getString()));
} else {
ReflectionUtils.setFieldValue(companyregister, item.getFieldName(),
new String(item.getString().getBytes("ISO-8859-1"), "UTF-8"));
}

} catch (Exception e) {
log.error("赋值参数出错", e);
}
} else {
log.info("参数名" + item.getFieldName() + item.getString());
}

}
}
}
registerService.insert(companyregister);
registerService = null;
companyregister = null;
response.sendRedirect("register_three.html");
} catch (Exception ex) {
log.error("提交企业资料出错", ex);
}