不是为了世界改变我们，而是世界不管变成什么样子，我们还是一样，保持最初的心。
文件上传
Servlet文件上传
引jar包
<!--文件上传的jar包-->
<dependency>
<groupId>commons-fileupload</groupId>
<artifactId>commons-fileupload</artifactId>
<version>1.3.1</version>
</dependency>
<dependency>
<groupId>commons-io</groupId>
<artifactId>commons-io</artifactId>
<version>1.4</version>
</dependency>
<!-- 包扫描器 --> <!-- multipartResolver 是定值 不能是其他-->
<context:component-scan base-package="cn.happy.controllerfileupload"></context:component-scan>
<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver"></bean>
<mvc:annotation-driven/>
@Controller
public class FirstController {
@RequestMapping("/first")
public String doFirst(MultipartFile upload, HttpSession session) {
//获取到用户上传的文件名称
String childpath = upload.getOriginalFilename();
//相对路径转换成绝对路径
String parenPath = session.getServletContext().getRealPath("/upload");
File filepath = new File(parenPath,childpath);
try {
upload.transferTo(filepath);
return "/WELCOME.jsp";
} catch (IOException e) {
e.printStackTrace();
return "/fileupload.jsp";
}
}
}
form要求
form要求：
<form method="post" enctype="multipart/form-data"> 多部分表单
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>文件上传</title>
</head>
<body>
<h2>文件上传</h2>
<form action="/first" method="post" enctype="multipart/form-data">
文件 <input type="file" name="upload"/>
<input type="submit">
</form>
</body>
</html>