服務端檔案上傳步驟
1、導入上傳坐标 commons-fileupload與 commons-io
<!-- 檔案上傳坐标 -->
<dependency>
<groupId>commons-fileupload</groupId>
<artifactId>commons-fileupload</artifactId>
<version>1.4</version>
</dependency>
<dependency>
<groupId>commons-io</groupId>
<artifactId>commons-io</artifactId>
<version>2.6</version>
</dependency>
</dependencies>
2、spring-mvc.xml中配置檔案上傳解析器
<!-- 上傳解析器 -->
<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
<!-- 上傳檔案總大小 -->
<property name="maxUploadSize" value="5242800"/>
<!-- 上傳單個檔案的大小 -->
<property name="maxUploadSizePerFile" value="5242800"/>
<!-- 檔案編碼 -->
<property name="defaultEncoding" value="UTF-8"/>
</bean>
3、編寫檔案上傳代碼
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>檔案上傳</title>
</head>
<body>
<div>
<h3>單檔案上傳</h3>
<form action="${pageContext.request.contextPath}/user/quick15" method="post" enctype="multipart/form-data">
檔案名：<input type="text" name="username"/><br/>
檔案：<input type="file" name="fileUpload"/> <br/>
<input type="submit" value="送出"/>
</form>
</div>
<div>
<h3>多檔案上傳</h3>
<form action="${pageContext.request.contextPath}/user/quick16" method="post" enctype="multipart/form-data">
檔案名：<input type="text" name="username"/><br/>
檔案1：<input type="file" name="fileUploads"/> <br/>
檔案2： <input type="file" name="fileUploads"/> <br/>
檔案3： <input type="file" name="fileUploads"/> <br/>
檔案4： <input type="file" name="fileUploads"/> <br/>
<input type="submit" value="送出"/>
</form>
</div>
</body>
</html>
@RequestMapping(value = "/quick15", method = RequestMethod.POST)
@ResponseBody
public String Test15(String username, MultipartFile fileUpload) throws IOException {
System.out.println("檔案名稱：" + username);
String originalFilename = fileUpload.getOriginalFilename();
// 儲存檔案到指定路徑
fileUpload.transferTo(new File("G:\\Java\\" + originalFilename));
System.out.println("上傳檔案的名稱：" + originalFilename);
return originalFilename;
}
@RequestMapping(value = "/quick16", method = RequestMethod.POST)
@ResponseBody
public String Test16(String username, MultipartFile[] fileUploads) throws IOException {
System.out.println("檔案名稱：" + username);
for (MultipartFile file:
fileUploads) {
String originalFilename = file.getOriginalFilename();
// 儲存檔案到指定路徑
file.transferTo(new File("G:\\Java\\" + originalFilename));
System.out.println("上傳檔案的名稱：" + originalFilename);
}
return username;
}
用戶端檔案上傳要求
- 使用表單送出 指定表單項 type=“file”.
- 表單送出的方式必須采用 method=“POST”
- 表單的enctype(多部分/表單資料)屬性必須采用 enctype=“multipart/form-data”
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