springboot annotation文件夹
时间: 2023-07-01 20:27:14 浏览: 57
在Spring Boot中,通常使用注解来配置应用程序。Annotation文件夹通常用于存放自定义注解类,以便在应用程序中进行复用。这些自定义注解可以用于控制器、服务、存储库等组件中,以提供更准确和明确的配置和功能。例如,您可以创建一个自定义注解来标记一个控制器方法,以便它只能由特定的用户角色访问。当您在应用程序中需要相同的功能时,只需在需要的地方使用该注解即可,这样可以减少代码的重复性,提高代码的可读性和可维护性。
相关问题
springboot 读取文件夹返回树给前端
可以使用递归的方式遍历文件夹,并将文件夹及其子文件夹信息封装成树形结构返回给前端。以下是一个示例代码:
```java
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import java.io.File;
import java.util.ArrayList;
import java.util.List;
@Controller
public class FileController {
@GetMapping("/tree")
@ResponseBody
public List<TreeNode> getFileTree() {
String rootPath = "D:/files"; // 文件夹根路径
File rootFile = new File(rootPath);
if (!rootFile.exists() || !rootFile.isDirectory()) {
return null;
}
TreeNode root = new TreeNode(rootFile.getName(), true);
buildFileTree(root, rootFile);
List<TreeNode> treeNodes = new ArrayList<>();
treeNodes.add(root);
return treeNodes;
}
private void buildFileTree(TreeNode parent, File parentFile) {
File[] files = parentFile.listFiles();
if (files != null && files.length > 0) {
for (File file : files) {
if (file.isDirectory()) {
TreeNode treeNode = new TreeNode(file.getName(), true);
parent.addChild(treeNode);
buildFileTree(treeNode, file);
} else {
TreeNode treeNode = new TreeNode(file.getName(), false);
parent.addChild(treeNode);
}
}
}
}
private static class TreeNode {
private String name;
private boolean directory;
private List<TreeNode> children;
public TreeNode(String name, boolean directory) {
this.name = name;
this.directory = directory;
}
public String getName() {
return name;
}
public boolean isDirectory() {
return directory;
}
public List<TreeNode> getChildren() {
return children;
}
public void addChild(TreeNode child) {
if (children == null) {
children = new ArrayList<>();
}
children.add(child);
}
}
}
```
通过访问 `/tree` 接口,可以获取文件夹树形结构的数据,前端可以根据这些数据进行展示。
帮我写一个springboot vue 文件夹打包下载本地静态资源的代码实现
好的,以下是代码实现:
前端代码:
```vue
<template>
<div>
<button @click="downloadFile">下载文件</button>
</div>
</template>
<script>
export default {
methods: {
downloadFile() {
window.open("/statics.zip");
},
},
};
</script>
```
后端代码:
```java
package com.example.demo.controller;
import org.springframework.boot.configurationprocessor.json.JSONException;
import org.springframework.boot.configurationprocessor.json.JSONObject;
import org.springframework.core.io.ClassPathResource;
import org.springframework.core.io.FileSystemResource;
import org.springframework.http.HttpHeaders;
import org.springframework.http.MediaType;
import org.springframework.http.ResponseEntity;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import java.io.*;
import java.util.zip.ZipEntry;
import java.util.zip.ZipOutputStream;
@Controller
public class FileDownloadController {
@GetMapping("/download/statics")
@ResponseBody
public ResponseEntity<byte[]> downloadStaticResources() throws IOException {
FileSystemResource fileSystemResource =
new FileSystemResource(compressStaticResources());
byte[] fileBytes = new byte[(int) fileSystemResource.getFile().length()];
FileInputStream inputStream = new FileInputStream(fileSystemResource.getFile());
inputStream.read(fileBytes);
HttpHeaders headers = new HttpHeaders();
headers.setContentType(MediaType.APPLICATION_OCTET_STREAM);
headers.setContentDispositionFormData("attachment", "statics.zip");
headers.setContentLength(fileBytes.length);
return ResponseEntity.ok().headers(headers).body(fileBytes);
}
private String compressStaticResources() {
String tempZipPath = System.getProperty("java.io.tmpdir")+"/statics.zip";
try (ZipOutputStream zos = new ZipOutputStream(new FileOutputStream(tempZipPath))) {
for (String staticsFolder : new String[]{"static", "public"}) {
try {
addFolderToZip(new ClassPathResource(staticsFolder).getFile(), staticsFolder, zos);
} catch (IOException e) {
e.printStackTrace();
}
}
return tempZipPath;
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return "";
}
private void addFolderToZip(File folder, String parentFolderName, ZipOutputStream zipOutputStream) throws IOException {
if (folder.isDirectory()) {
for (File file : folder.listFiles()) {
addFolderToZip(file, parentFolderName, zipOutputStream);
}
} else {
String name = folder.getName();
String path = folder.getPath().replace("\\", "/");
zipOutputStream.putNextEntry(new ZipEntry(path.substring(path.indexOf(parentFolderName), path.length())));
FileInputStream fileInputStream = new FileInputStream(folder);
byte[] bytes = new byte[1024];
int length;
while ((length = fileInputStream.read(bytes)) >= 0) {
zipOutputStream.write(bytes, 0, length);
}
fileInputStream.close();
}
}
}
```
这段代码使用了ZipOutputStream,将指定的静态资源文件夹进行了压缩,并通过@RepositoryRestController注解的Controller接口提供了下载静态资源文件的功能。
你可以在前端页面点击下载文件按钮,将会自动下载静态资源文件。同时,该代码也适用于任意SpringBoot+Vue项目。