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Spring MVC上传文件
==================
1 前端
表单提交方式必须为POST。
表单enctype属性为multipart/form-data。
/src/main/webapp/addBook.jsp：
...
...
...
...
2 实体类
自动填值的属性，其名称必须与表单项的name严格一致，不一致者手动填值。
/src/main/java/cn/tedu/springfile/pojo/Book.java：
public class Book {
private int id;
private String name; // <-Setter- form.name
private String author; // <-Setter- form.author
private double price; // <-Setter- form.price
private String cover;
public Book() {
}
public Book(int id, String name, String author, double price, String cover) {
this.id = id;
this.name = name;
this.author = author;
this.price = price;
this.cover = cover;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getAuthor() {
return author;
}
public void setAuthor(String author) {
this.author = author;
}
public double getPrice() {
return price;
}
public void setPrice(double price) {
this.price = price;
}
public String getCover() {
return cover;
}
public void setCover(String cover) {
this.cover = cover;
}
@Override
public String toString() {
return "Book{" +
"id=" + id +
", name='" + name + '\'' +
", author='" + author + '\'' +
", price=" + price +
", cover='" + cover + '\'' +
'}';
}
}
3 控制器
enctype属性为multipart/form-data的表单数据，如何传入控制器方法？
前端上传的文件如何接收？
- 添加依赖
/pom.xml：
commons-io
commons-io
2.4
commons-fileupload
commons-fileupload
1.4
- 添加组件
/src/main/resources/spring-servlet.xml：
...
...
- 接收文件
在/src/main/webapp/images目录下随便放个文件，以使该目录被部署。
/src/main/java/cn/tedu/springfile/controllers/BookController.java：
...
public class BookController {
...
public String addBook(Book book, MultipartFile image,
HttpServletRequest request) throws IOException {
...
// 原始文件名
String originalFilename = image.getOriginalFilename();
// 文件名后缀
String suffix = originalFilename.substring(
originalFilename.lastIndexOf("."));
// 文件名
String filename = System.currentTimeMillis() + suffix;
// 目录名
String dir = request.getServletContext().getRealPath("images");
// 存储路径
String filepath = dir + "/" + filename;
// 保存文件
image.transferTo(new File(filepath));
// 访问路径
String cover = "images/" + filename;
book.setCover(cover);
System.out.println("控制器> 封面：" + book.getCover());
...
}
...
}
例程：SpringFile