图片上传示例：
@Slf4j
public class ImageUpload {
public void saveImage(String base64Url) throws BusinessException {
MultipartFile multipartFile = null;
try {
String[] baseStrs = base64Url.split(",");
byte[] b = new byte[0];
b = Base64.decodeBase64(baseStrs[1]);
for (int i = 0; i < b.length; ++i) {
if (b[i] < 0) {//调整异常数据
b[i] += 256;
}
}
multipartFile = new BASE64DecodedMultipartFile(b, baseStrs[0]);
//设置图片存储路径
File imagePath = new File("E:/images/meeting/file");
if (!imagePath.exists()) {
imagePath.mkdirs();
}
String name = UUID.randomUUID().toString().replaceAll("-", "").toUpperCase();
File imageFile = new File(imagePath, name);
if (imageFile.exists()) {
imageFile.delete();
}
multipartFile.transferTo(imageFile);
} catch (Exception e) {
log.info(e.getMessage());
e.printStackTrace();
}
}
}
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在application.properties中设置图片访问的路径：
spring.mvc.static-path-pattern=http://ip:post/images/**
spring.resources.static-locations=file:图片真正存储的路径filepath
文件上传示例：
配置文件上传的大小：spring.servlet.multipart.maxFileSize=2MB
编码：
spring.http.encoding.charset=UTF-8
spring.http.encoding.enabled=true
spring.http.encoding.force=true
public boolean getSuffixs(String suffixName) {
String suffix = ".doc/.docx/.pdf";
HashSet suffixs = new HashSet();
String[] strs = suffix.split("/");
for (String str : strs) {
if (!suffixs.contains(str)) {
suffixs.add(str);
}
}
if (!suffixs.contains(suffixName)) {
return false;
}
return true;
}
public String fileUpload(@RequestParam("file") MultipartFile file) {
String filePath = "E:/images/meeting/file/";
try {
if (file.isEmpty()) {
return "文件为空";
}
// 获取文件名
String fileName = new String(file.getOriginalFilename());
log.info("上传的文件名为：" + fileName);
// 获取文件的后缀名
String suffixName = fileName.substring(fileName.lastIndexOf("."));
log.info("文件的后缀名为：" + suffixName);
String str = ".doc/.docx/.pdf";
if (!getSuffixs(suffixName)) {
return "文件格式不正确，允许上传的文件格式有：";
}
// 设置文件存储路径
String name = UUID.randomUUID().toString().replaceAll("-", "").toUpperCase();
String path = filePath+ name;
File dest = new File(path, fileName);
// 检测是否存在目录
if (!dest.getParentFile().exists()) {
dest.getParentFile().mkdirs();// 新建文件夹
}
file.transferTo(dest);// 文件写入
String fileDownLoadPath = "http://localhost:8080/file/download/" + name + "/" + fileName;
return fileDownLoadPath;
} catch (IllegalStateException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return "文件上传失败";
}
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文件下载示例：
public String downloadFile(@PathVariable String path, @PathVariable String fileName, HttpServletRequest request,
HttpServletResponse response) {
String filePath = "E:/images/meeting/file/";
// 设置文件名，根据业务需要替换成要下载的文件名
if (fileName != null) {
//设置文件路径
String realPath = filePath + path;
File file = new File(realPath, fileName);
//用于解决下载下来的文件名乱码问题
String userAgent = request.getHeader("User-Agent");
try {
if (userAgent.contains("MSIE") || userAgent.contains("Trident")) {
fileName = java.net.URLEncoder.encode(fileName, "UTF-8");
} else {
fileName = new String(fileName.getBytes("UTF-8"), "ISO-8859-1");
}
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
if (file.exists()) {
response.setContentType("application/force-download");// 设置强制下载不打开
response.addHeader("Content-Disposition", "attachment;fileName=" + fileName);// 设置文件名
byte[] buffer = new byte[1024];
FileInputStream fis = null;
BufferedInputStream bis = null;
try {
fis = new FileInputStream(file);
bis = new BufferedInputStream(fis);
OutputStream os = response.getOutputStream();
int i = bis.read(buffer);
while (i != -1) {
os.write(buffer, 0, i);
i = bis.read(buffer);
}
System.out.println("success");
} catch (Exception e) {
e.printStackTrace();
} finally {
if (bis != null) {
try {
bis.close();
} catch (IOException e) {
e.printStackTrace();
}
}
if (fis != null) {
try {
fis.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
}
return null;
}
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