1 问题描述
服务执行时，读取 jar 所在目录的外部文件
2 解决方案
通过 ApplicationHome 获取 jar 所在目录路径
1
2
| ApplicationHome home = new ApplicationHome(TestSpringBootApplication.class);
String jarPath = home.getDir().toString();
|
3 案例
1）建立一个 Controller，响应更新所在目录路径
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
| @RestController
public class ActionController {
@RequestMapping("/dir")
public String updateDirMsg() {
ApplicationHome home = new ApplicationHome(TestSpringBootApplication.class);
String jarPath = home.getDir().toString();
try (BufferedWriter writer = new BufferedWriter(new FileWriter(jarPath + "/path.txt", true))) {
writer.write(LocalDateTime.now() + " :" + jarPath);
writer.newLine();
writer.flush();
} catch (IOException e) {
System.err.println("写入文件时发生错误: " + e.getMessage());
}
return jarPath;
}
}
|
2）更进一步，利用路径保存上传的文件
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
| @Controller
public class FileUploadController {
private static final String UPLOAD_ROOT_DIR = new ApplicationHome(TestSpringBootApplication.class).getDir().toString();
@PostMapping("/upload")
public ResponseEntity<String> uploadFile(@RequestParam("file") MultipartFile file) {
if (file.isEmpty()) {
return ResponseEntity.badRequest().body("上传的压缩包不能为空");
}
try {
Path targetPath = Paths.get(UPLOAD_ROOT_DIR, file.getOriginalFilename());
Files.createDirectories(targetPath.getParent());
file.transferTo(targetPath.toFile());
unzipFile(targetPath.toString(), UPLOAD_ROOT_DIR);
FileSystemResource fileSystemResource = new FileSystemResource(targetPath.toFile());
return ResponseEntity.ok().body(String.valueOf(fileSystemResource));
} catch (IOException e) {
e.printStackTrace();
return ResponseEntity.status(500).body("上传过程中发生错误：" + e.getMessage());
}
}
private void unzipFile(String zipFilePath, String destDir) throws IOException {
try (ZipInputStream zis = new ZipInputStream(new FileInputStream(zipFilePath))) {
ZipEntry entry = zis.getNextEntry();
while (entry != null) {
Path filePath = Paths.get(destDir, entry.getName());
if (!entry.isDirectory()) {
Files.createDirectories(filePath.getParent());
Files.copy(zis, filePath);
} else {
Files.createDirectories(filePath);
}
zis.closeEntry();
entry = zis.getNextEntry();
}
}
}
|
相应的前端案例代码
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
| <!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Upload Zip File</title>
<link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha1/dist/css/bootstrap.min.css" rel="stylesheet">
</head>
<body>
<div class="container mt-4">
<h2>Upload and Extract ZIP File</h2>
<form id="uploadForm" enctype="multipart/form-data">
<div class="mb-3">
<label for="zipFile" class="form-label">Select a ZIP file to upload:</label>
<input type="file" class="form-control" id="zipFile" name="file" accept=".zip">
</div>
<button type="submit" class="btn btn-primary" id="uploadButton">Upload & Extract</button>
</form>
<div id="responseMessage"></div>
</div>
<script>
document.addEventListener('DOMContentLoaded', function() {
const uploadForm = document.getElementById('uploadForm');
const zipFileInput = document.getElementById('zipFile');
const responseMessage = document.getElementById('responseMessage');
const uploadButton = document.getElementById('uploadButton');
uploadButton.addEventListener('click', function(event) {
event.preventDefault(); // 阻止表单默认提交行为
if (!zipFileInput.files.length) {
responseMessage.textContent = "Please select a ZIP file.";
return;
}
const formData = new FormData(uploadForm);
fetch('/upload', {
method: 'POST',
body: formData,
})
.then(response => response.text())
.then(data => {
responseMessage.textContent = data;
// 在这里可以添加跳转到查看解压后文件列表的逻辑
})
.catch(error => {
responseMessage.textContent = "An error occurred while uploading the file: " + error;
});
// 清空已选择的文件
zipFileInput.value = '';
});
});
</script>
</body>
</html>
|