Struts文件上传

产品图片上传与验证

最新推荐文章于 2025-04-24 15:59:51 发布

原创最新推荐文章于 2025-04-24 15:59:51 发布 · 128 阅读

0 ·

CC 4.0 BY-SA版权

文章标签：

#Struts #OS

<html>
<head>
<title>添加产品</title>
</head>
<html:errors property="error.add"/>
<html:errors property="error.type" />
<html:errors property="error.size" />
<body>
<html:form action="/addProduct.do?method=addProduct" method="post"
enctype="multipart/form-data" >
产品图片:<html:file property="file"></html:file>
<html:submit value="添加" />
</html:form>
</body>
</html>

---------------------------------------------------------------------
public ActionForward addProduct(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response) {
ProductForm productForm = (ProductForm) form;
Product product = productForm.getProduct();
FormFile file = productForm.getFile();
ActionErrors errors = new ActionErrors();
try {
// 设置只能上传图片类型的文件
if (!file.getContentType().equals("image/pjpeg")) {
errors.add("error.type",
new ActionMessage("你选择的文件类型错误!", false));
this.addErrors(request, errors);
return new ActionForward(mapping.getInput());
}
// 设置上传文件的大小
int maxFileSize = 3 * 1024 * 1024;
if (file.getFileSize() > maxFileSize) {
errors.add("error.size", new ActionMessage("你选择的文件过大!", false));
this.addErrors(request, errors);
return new ActionForward(mapping.getInput());
}
// 获得服务器存放上传文件的绝对路径
String dir = this.getServlet().getServletContext().getRealPath(
"images");
// 获得上传的文件名
String fileName = file.getFileName();
// 用当前时间作为上传的新文件名
String newFileName = DataDefine.getDateId()
+ fileName.substring(fileName.lastIndexOf("."));
// 存储到数据中图片的路径
String imagePath = "images" + "/" + newFileName;

public ActionForward addProduct(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response) {
ProductForm productForm = (ProductForm) form;
Product product = productForm.getProduct();
FormFile file = productForm.getFile();
ActionErrors errors = new ActionErrors();
try {
// 设置只能上传图片类型的文件
if (!file.getContentType().equals("image/pjpeg")) {
errors.add("error.type",
new ActionMessage("你选择的文件类型错误!", false));
this.addErrors(request, errors);
return new ActionForward(mapping.getInput());
}
// 设置上传文件的大小
int maxFileSize = 3 * 1024 * 1024;
if (file.getFileSize() > maxFileSize) {
errors.add("error.size", new ActionMessage("你选择的文件过大!", false));
this.addErrors(request, errors);
return new ActionForward(mapping.getInput());
}
// 获得服务器存放上传文件的绝对路径
String dir = this.getServlet().getServletContext().getRealPath(
"images");
// 获得上传的文件名
String fileName = file.getFileName();
// 用当前时间作为上传的新文件名
String newFileName = DataDefine.getDateId()
+ fileName.substring(fileName.lastIndexOf("."));
// 存储到数据中图片的路径
String imagePath = "images" + "/" + newFileName;

详细代码2：

Java代码
// 获得文件输入流
InputStream is = file.getInputStream();
// 创建文件输出流
OutputStream os = new FileOutputStream(dir + File.separator
+ newFileName);
byte[] buffer = new byte[1024];
int b = 0;
while ((b = is.read(buffer, 0, 1024)) != -1) {
os.write(buffer, 0, b);
}
// 添加至数据库
product.setImagePath(imagePath);
boolean isFlag = productBiz.addProduct(product);
if (!isFlag) {
errors.add("error.add", new ActionMessage("添加产品失败！", false));
this.addErrors(request, errors);
return new ActionForward(mapping.getInput());
}
request.setAttribute("message", "添加产品成功");
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} finally {
file.destroy();
}
return mapping.findForward("success");