使用 SpringBoot 項目完成單個、多個文件的上傳處理,並將上傳的文件保存到指定目錄下。
代碼演示案例
全部的 HTML 頁面文件
index.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>選擇上傳文件類型</title>
</head>
<script language="javascript">
function single() {
document.form1.action = "/singlefile";
document.form1.submit();
}
function multi() {
document.form1.action = "/multifile";
document.form1.submit();
}
</script>
<body>
<form name="form1" method="post">
<input type="button" name="btn1" value="單個文件上傳" onclick="single();">
<input type="button" name="btn2" value="多個文件上傳" onclick="multi();">
</form>
</body>
</html>
multifile.html
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml" xmlns:th="http://www.thymeleaf.org">
<head>
<meta charset="UTF-8"/>
<title>多文件上傳</title>
</head>
<body>
<h1 th:inlines="text">多文件上傳</h1>
<form action="/multiFileUpload" method="post" enctype="multipart/form-data">
<p>選擇文件1: <input type="file" name="fileName"/></p>
<p>選擇文件2: <input type="file" name="fileName"/></p>
<p>選擇文件3: <input type="file" name="fileName"/></p>
<p><input type="submit" value="提交"/></p>
</form>
</body>
</html>
singlefile.html
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml" xmlns:th="http://www.thymeleaf.org">
<head>
<meta charset="UTF-8"/>
<title>單文件上傳</title>
</head>
<body>
<h1 th:inlines="text">單文件上傳</h1>
<form action="/singleFile" method="post" enctype="multipart/form-data">
<p>文件:<input type="file" name="head_img"/></p>
<p><input type="submit" value="上傳"/></p>
</form>
</body>
</html>
邏輯代碼
定義結果集
@Getter
@Setter
@ToString
public class Result implements Serializable {
private boolean flag; //是否成功
private Integer code; //返回碼
private String message;//返回信息
public Result(boolean flag, Integer code, String message) {
this.flag = flag;
this.code = code;
this.message = message;
}
}
定義錯誤碼
public class StatusCode {
public static final int OK = 2000; //成功
public static final int ERROR = 4000; //失敗
}
邏輯代碼
@Controller
@Slf4j
public class FileController {
@Value("${file.path}")
private String filePath;
// 獲取 singlefile.html 頁面
@RequestMapping(value = "/singlefile", method = RequestMethod.POST)
public String single() {
return "singlefile";
}
// 單文件上傳
@RequestMapping(value = "singleFile")
@ResponseBody
public Result uploadFile(@RequestParam("head_img") MultipartFile file, HttpServletRequest request) {
if (file.isEmpty()) {
return new Result(false, StatusCode.ERROR, "上傳的文件大小爲空,請檢查!!");
}
//獲取文件名稱、後綴名、大小
String fileName = file.getOriginalFilename();
String suffixName = fileName.substring(fileName.lastIndexOf("."));
long size = file.getSize();
log.info("上傳的文件名稱爲:[{}],文件後綴爲:[{}],文件大小爲:[{}]!!", fileName, suffixName, size);
// 存儲轉換後文件名稱
fileName = UUID.randomUUID() + suffixName;
log.info("轉換後的文件名爲:[{}]!!", fileName);
File dest = new File(filePath + fileName);
//判斷父目錄是否存在
if (!dest.getParentFile().exists()) {
dest.getParentFile().mkdir();
}
try {
file.transferTo(dest);
return new Result(true, StatusCode.OK, "上傳成功!!");
} catch (IOException e) {
log.error("上傳文件過程當中發生異常!", e);
}
return new Result(true, StatusCode.ERROR, "上傳失敗!!");
}
// 獲取 multifile.html 頁面
@RequestMapping("/multifile")
public String multi() {
return "multifile";
}
// 多文件上傳
@PostMapping(value = "multiFileUpload")
@ResponseBody
public Result multiFileUpload(HttpServletRequest request) {
List<MultipartFile> files = ((MultipartHttpServletRequest) request).getFiles("fileName");
for (MultipartFile file : files) {
if (file.isEmpty()) {
return new Result(false, StatusCode.ERROR, "上傳多個文件時,某個文件大小爲空,請檢查!!");
} else {
String fileName = file.getOriginalFilename();
String suffixName = fileName.substring(fileName.lastIndexOf("."));
long size = file.getSize();
log.info("上傳的文件名稱爲:[{}],文件後綴爲:[{}],文件大小爲:[{}]!!", fileName, suffixName, size);
fileName = UUID.randomUUID() + suffixName;
log.info("轉換後的文件名爲:[{}]!!", fileName);
File dest = new File(filePath + fileName);
if (!dest.getParentFile().exists()) {
dest.getParentFile().mkdir();
}
try {
file.transferTo(dest);
} catch (IOException e) {
log.error("上傳文件過程當中發生異常!!", e);
}
}
}
return new Result(true, StatusCode.OK, "上傳成功!!");
}
}
application.properties
# 端口
server.port=8082
# 配置單個文件、多個文件大小
spring.servlet.multipart.max-file-size=100MB
spring.servlet.multipart.max-request-size=100MB
# 文件上傳保存路徑
file.path=E:/test/
# 取消模板文件緩存
spring.thymeleaf.cache=false
文件 結構目錄