SSM——SpringMVC笔记2

文件上传客户端三要素

• 表单项type=“file”
• 表单的提交方式是POST
• 表单的enctype属性是多部分表单形式，及enctype=“multipart/form-data”

单文件上传步骤

1. 导入fileupload和id坐标

			 <dependency>
             <groupId>commons-fileuploadgroupId>
             <artifactId>commons-fileuploadartifactId>
             <version>1.3.1version>
           dependency>
           <dependency>
             <groupId>commons-iogroupId>
             <artifactId>commons-ioartifactId>
             <version>2.6version>
           dependency>

2. 配置文件上传解析器 spring-mvc.xml

			 
           <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
               
               <property name="defaultEncoding" value="UTF-8"/>
               
               <property name="maxUploadSize" value="500000"/>
           bean>

3. 编写文件上传代码

 			<form action="${pageContext.request.contextPath}/user/quick10" method="post" enctype="multipart/form-data">
               名称<input type="text" name="username"><br>
               文件<input type="file" name="upload">
               <input type="submit" value="提交">
           form>

  		   @RequestMapping("/quick10")
           @ResponseBody
           public void save10(String username, MultipartFile upload) throws IOException {
     
               System.out.println(username);
               System.out.println(upload);
               //获取上传文件的名称
               String filename = upload.getOriginalFilename();
               //将文件上传到某个位置
               upload.transferTo(new File("G:\\upload\\"+filename));
           }