這是我參與8月更文挑戰的第4天,活動詳情查看:8月更文挑戰java
前言:基本上每一個項目,都會有個上傳文件、頭像這樣的需求,文件能夠存儲在阿里雲、騰訊雲、七牛雲這樣的對象存儲服務上,可是使用這些都不能白嫖,這就讓人很難受啊。而後就找到了這個Minio,感受仍是很爽的,所有由本身掌控。代碼中附帶詳細解釋,不懂的也能夠留言或私信,會及時做出回覆!web
封面地點:
湖南省永州市藍山縣舜河村spring
做者:
用心笑*👩數據庫
minio介紹: MinIO是根據GNU Affero通用公共許可證v3.0發佈的高性能對象存儲。apache
minio特色:api
你們都使用過雲存儲,minio其實也差很少,只是能夠更加的方便。tomcat
別看我寫這麼多代碼,其實邏輯很是簡單,你們安裝好minio,直接CV大法就能跑了。😀👨💻springboot
對了,若是你須要找一個判斷文件類型的工具類,此文也涵蓋了。🙆♂️服務器
環境準備markdown
項目結構
只要搭建好minio服務後,項目編碼實際上特別簡單。
我想這個你們都會哈
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.5.2</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<dependencies>
<!--此處我用的最近更新的minio jar包-->
<dependency>
<groupId>io.minio</groupId>
<artifactId>minio</artifactId>
<version>8.2.1</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-configuration-processor</artifactId>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-lang3</artifactId>
</dependency>
<dependency>
<groupId>cn.hutool</groupId>
<artifactId>hutool-all</artifactId>
<version>5.6.5</version>
</dependency>
<!--爲了兼容性 我用的是jdk11-->
<dependency>
<groupId>javax.xml.bind</groupId>
<artifactId>jaxb-api</artifactId>
<version>2.3.0</version>
</dependency>
<dependency>
<groupId>com.sun.xml.bind</groupId>
<artifactId>jaxb-impl</artifactId>
<version>2.3.0</version>
</dependency>
<dependency>
<groupId>com.sun.xml.bind</groupId>
<artifactId>jaxb-core</artifactId>
<version>2.3.0</version>
</dependency>
<dependency>
<groupId>javax.activation</groupId>
<artifactId>activation</artifactId>
<version>1.1.1</version>
</dependency>
</dependencies>
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spring:
profiles:
active: prod
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server:
port: 8085
spring:
application:
name: springboot-minio
minio:
endpoint: http://IP地址 :9000
port: 9000
accessKey: 登陸帳號
secretKey: 登陸密碼
secure: false
bucket-name: commons # 桶名 我這是給出了一個默認桶名
image-size: 10485760 # 我在這裏設定了 圖片文件的最大大小
file-size: 1073741824 # 此處是設定了文件的最大大小
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你們隨本身習慣哈。(🐕保命)
存在於config包下,此類的主要做用就是與配置文件進行綁定,方便注入以及後期維護。
import io.minio.MinioClient;
import lombok.Data;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
/** * @author crush */
@Data
@Configuration
@ConfigurationProperties(prefix = "minio")
public class MinioProperties {
/** * 是一個URL,域名,IPv4或者IPv6地址") */
private String endpoint;
/** * //"TCP/IP端口號" */
private Integer port;
/** * //"accessKey相似於用戶ID,用於惟一標識你的帳戶" */
private String accessKey;
/** * //"secretKey是你帳戶的密碼" */
private String secretKey;
/** * //"若是是true,則用的是https而不是http,默認值是true" */
private boolean secure;
/** * //"默認存儲桶" */
private String bucketName;
/** * 圖片的最大大小 */
private long imageSize;
/** * 其餘文件的最大大小 */
private long fileSize;
/** * 官網給出的 構造方法,我只是去爬了一下官網 (狗頭保命) * 此類是 客戶端進行操做的類 */
@Bean
public MinioClient minioClient() {
MinioClient minioClient =
MinioClient.builder()
.credentials(accessKey, secretKey)
.endpoint(endpoint,port,secure)
.build();
return minioClient;
}
}
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FileTypeUtils :是我結合Hutool 工具包 再次封裝的一個工具類,爲了方便調用的返回數據。
本身以爲仍是挺實用的(👩🚀🤱)
MinioUtil:是對minioClient操做的再一次封裝。
我是將文件分了大類,而後再根據準確的文件後綴名選擇文件保存方式。
import cn.hutool.core.io.FileTypeUtil;
import org.springframework.web.multipart.MultipartFile;
import java.io.IOException;
import java.io.InputStream;
/** * @Author: crush * @Date: 2021-07-25 22:26 * version 1.0 */
public class FileTypeUtils {
private final static String IMAGE_TYPE = "image/";
private final static String AUDIO_TYPE = "audio/";
private final static String VIDEO_TYPE = "video/";
private final static String APPLICATION_TYPE = "application/";
private final static String TXT_TYPE = "text/";
public static String getFileType(MultipartFile multipartFile) {
InputStream inputStream = null;
String type = null;
try {
inputStream = multipartFile.getInputStream();
type = FileTypeUtil.getType(inputStream);
System.out.println(type);
if (type.equalsIgnoreCase("JPG") || type.equalsIgnoreCase("JPEG")
|| type.equalsIgnoreCase("GIF") || type.equalsIgnoreCase("PNG")
|| type.equalsIgnoreCase("BMP") || type.equalsIgnoreCase("PCX")
|| type.equalsIgnoreCase("TGA") || type.equalsIgnoreCase("PSD")
|| type.equalsIgnoreCase("TIFF")) {
return IMAGE_TYPE+type;
}
if (type.equalsIgnoreCase("mp3") || type.equalsIgnoreCase("OGG")
|| type.equalsIgnoreCase("WAV") || type.equalsIgnoreCase("REAL")
|| type.equalsIgnoreCase("APE") || type.equalsIgnoreCase("MODULE")
|| type.equalsIgnoreCase("MIDI") || type.equalsIgnoreCase("VQF")
|| type.equalsIgnoreCase("CD")) {
return AUDIO_TYPE+type;
}
if (type.equalsIgnoreCase("mp4") || type.equalsIgnoreCase("avi")
|| type.equalsIgnoreCase("MPEG-1") || type.equalsIgnoreCase("RM")
|| type.equalsIgnoreCase("ASF") || type.equalsIgnoreCase("WMV")
|| type.equalsIgnoreCase("qlv") || type.equalsIgnoreCase("MPEG-2")
|| type.equalsIgnoreCase("MPEG4") || type.equalsIgnoreCase("mov")
|| type.equalsIgnoreCase("3gp")) {
return VIDEO_TYPE+type;
}
if (type.equalsIgnoreCase("doc") || type.equalsIgnoreCase("docx")
|| type.equalsIgnoreCase("ppt") || type.equalsIgnoreCase("pptx")
|| type.equalsIgnoreCase("xls") || type.equalsIgnoreCase("xlsx")
|| type.equalsIgnoreCase("zip")||type.equalsIgnoreCase("jar")) {
return APPLICATION_TYPE+type;
}
if (type.equalsIgnoreCase("txt")) {
return TXT_TYPE+type;
}
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
}
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這個就比較多了,畢竟是對minioClient 的再次封裝。代碼簡單,你莫慌,直接CV 完慢慢看🧜♂️
import java.io.ByteArrayInputStream;
import java.io.InputStream;
import java.nio.charset.StandardCharsets;
import java.util.ArrayList;
import java.util.LinkedList;
import java.util.List;
import java.util.concurrent.TimeUnit;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import com.crush.minio.config.MinioProperties;
import io.minio.*;
import io.minio.http.Method;
import io.minio.messages.DeleteObject;
import org.apache.commons.lang3.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import org.springframework.web.multipart.MultipartFile;
import io.minio.errors.ErrorResponseException;
import io.minio.messages.Bucket;
import io.minio.messages.DeleteError;
import io.minio.messages.Item;
import lombok.SneakyThrows;
/** * @Author crush * @Date 2021/7/25 11:43 */
@Component
public class MinioUtil {
private final MinioClient minioClient;
private final MinioProperties minioProperties;
public MinioUtil(MinioClient minioClient, MinioProperties minioProperties) {
this.minioClient = minioClient;
this.minioProperties = minioProperties;
}
/** * 檢查存儲桶是否存在 * * @param bucketName 存儲桶名稱 * @return */
@SneakyThrows
public boolean bucketExists(String bucketName) {
boolean found =
minioClient.bucketExists(BucketExistsArgs.builder().bucket(bucketName).build());
if (found) {
System.out.println(bucketName + " exists");
} else {
System.out.println(bucketName + " does not exist");
}
return found;
}
/** * 建立存儲桶 * * @param bucketName 存儲桶名稱 */
@SneakyThrows
public boolean makeBucket(String bucketName) {
boolean flag = bucketExists(bucketName);
if (!flag) {
minioClient.makeBucket(
MakeBucketArgs.builder()
.bucket(bucketName)
.build());
return true;
} else {
return false;
}
}
/** * 列出全部存儲桶名稱 * * @return */
@SneakyThrows
public List<String> listBucketNames() {
List<Bucket> bucketList = listBuckets();
List<String> bucketListName = new ArrayList<>();
for (Bucket bucket : bucketList) {
bucketListName.add(bucket.name());
}
return bucketListName;
}
/** * 列出全部存儲桶 * * @return */
@SneakyThrows
public List<Bucket> listBuckets() {
return minioClient.listBuckets();
}
/** * 刪除存儲桶 * * @param bucketName 存儲桶名稱 * @return */
@SneakyThrows
public boolean removeBucket(String bucketName) {
boolean flag = bucketExists(bucketName);
if (flag) {
Iterable<Result<Item>> myObjects = listObjects(bucketName);
for (Result<Item> result : myObjects) {
Item item = result.get();
// 有對象文件,則刪除失敗
if (item.size() > 0) {
return false;
}
}
// 刪除存儲桶,注意,只有存儲桶爲空時才能刪除成功。
minioClient.removeBucket(RemoveBucketArgs.builder().bucket(bucketName).build());
flag = bucketExists(bucketName);
if (!flag) {
return true;
}
}
return false;
}
/** * 列出存儲桶中的全部對象名稱 * * @param bucketName 存儲桶名稱 * @return */
@SneakyThrows
public List<String> listObjectNames(String bucketName) {
List<String> listObjectNames = new ArrayList<>();
boolean flag = bucketExists(bucketName);
if (flag) {
Iterable<Result<Item>> myObjects = listObjects(bucketName);
for (Result<Item> result : myObjects) {
Item item = result.get();
listObjectNames.add(item.objectName());
}
}else{
listObjectNames.add("存儲桶不存在");
}
return listObjectNames;
}
/** * 列出存儲桶中的全部對象 * * @param bucketName 存儲桶名稱 * @return */
@SneakyThrows
public Iterable<Result<Item>> listObjects(String bucketName) {
boolean flag = bucketExists(bucketName);
if (flag) {
return minioClient.listObjects(
ListObjectsArgs.builder().bucket(bucketName).build());
}
return null;
}
/** * 文件上傳 * * @param bucketName * @param multipartFile */
@SneakyThrows
public void putObject(String bucketName, MultipartFile multipartFile, String filename, String fileType) {
InputStream inputStream = new ByteArrayInputStream(multipartFile.getBytes());
minioClient.putObject(
PutObjectArgs.builder().bucket(bucketName).object(filename).stream(
inputStream, -1, minioProperties.getFileSize())
.contentType(fileType)
.build());
}
/** * 文件訪問路徑 * * @param bucketName 存儲桶名稱 * @param objectName 存儲桶裏的對象名稱 * @return */
@SneakyThrows
public String getObjectUrl(String bucketName, String objectName) {
boolean flag = bucketExists(bucketName);
String url = "";
if (flag) {
url = minioClient.getPresignedObjectUrl(
GetPresignedObjectUrlArgs.builder()
.method(Method.GET)
.bucket(bucketName)
.object(objectName)
.expiry(2, TimeUnit.MINUTES)
.build());
System.out.println(url);
}
return url;
}
/** * 刪除一個對象 * * @param bucketName 存儲桶名稱 * @param objectName 存儲桶裏的對象名稱 */
@SneakyThrows
public boolean removeObject(String bucketName, String objectName) {
boolean flag = bucketExists(bucketName);
if (flag) {
minioClient.removeObject(
RemoveObjectArgs.builder().bucket(bucketName).object(objectName).build());
return true;
}
return false;
}
/** * 以流的形式獲取一個文件對象 * * @param bucketName 存儲桶名稱 * @param objectName 存儲桶裏的對象名稱 * @return */
@SneakyThrows
public InputStream getObject(String bucketName, String objectName) {
boolean flag = bucketExists(bucketName);
if (flag) {
StatObjectResponse statObject = statObject(bucketName, objectName);
if (statObject != null && statObject.size() > 0) {
InputStream stream =
minioClient.getObject(
GetObjectArgs.builder()
.bucket(bucketName)
.object(objectName)
.build());
return stream;
}
}
return null;
}
/** * 獲取對象的元數據 * * @param bucketName 存儲桶名稱 * @param objectName 存儲桶裏的對象名稱 * @return */
@SneakyThrows
public StatObjectResponse statObject(String bucketName, String objectName) {
boolean flag = bucketExists(bucketName);
if (flag) {
StatObjectResponse stat =
minioClient.statObject(
StatObjectArgs.builder().bucket(bucketName).object(objectName).build());
return stat;
}
return null;
}
/** * 刪除指定桶的多個文件對象,返回刪除錯誤的對象列表,所有刪除成功,返回空列表 * * @param bucketName 存儲桶名稱 * @param objectNames 含有要刪除的多個object名稱的迭代器對象 * @return */
@SneakyThrows
public boolean removeObject(String bucketName, List<String> objectNames) {
boolean flag = bucketExists(bucketName);
if (flag) {
List<DeleteObject> objects = new LinkedList<>();
for (int i = 0; i < objectNames.size(); i++) {
objects.add(new DeleteObject(objectNames.get(i)));
}
Iterable<Result<DeleteError>> results =
minioClient.removeObjects(
RemoveObjectsArgs.builder().bucket(bucketName).objects(objects).build());
for (Result<DeleteError> result : results) {
DeleteError error = result.get();
System.out.println(
"Error in deleting object " + error.objectName() + "; " + error.message());
return false;
}
}
return true;
}
/** * 以流的形式獲取一個文件對象(斷點下載) * * @param bucketName 存儲桶名稱 * @param objectName 存儲桶裏的對象名稱 * @param offset 起始字節的位置 * @param length 要讀取的長度 (可選,若是無值則表明讀到文件結尾) * @return */
@SneakyThrows
public InputStream getObject(String bucketName, String objectName, long offset, Long length) {
boolean flag = bucketExists(bucketName);
if (flag) {
StatObjectResponse statObject = statObject(bucketName, objectName);
if (statObject != null && statObject.size() > 0) {
InputStream stream =
minioClient.getObject(
GetObjectArgs.builder()
.bucket(bucketName)
.object(objectName)
.offset(offset)
.length(length)
.build());
return stream;
}
}
return null;
}
/** * 經過InputStream上傳對象 * * @param bucketName 存儲桶名稱 * @param objectName 存儲桶裏的對象名稱 * @param inputStream 要上傳的流 * @param contentType 要上傳的文件類型 MimeTypeUtils.IMAGE_JPEG_VALUE * @return */
@SneakyThrows
public boolean putObject(String bucketName, String objectName, InputStream inputStream,String contentType) {
boolean flag = bucketExists(bucketName);
if (flag) {
minioClient.putObject(
PutObjectArgs.builder().bucket(bucketName).object(objectName).stream(
inputStream, -1, minioProperties.getFileSize())
.contentType(contentType)
.build());
StatObjectResponse statObject = statObject(bucketName, objectName);
if (statObject != null && statObject.size() > 0) {
return true;
}
}
return false;
}
}
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import io.minio.messages.Bucket;
import org.springframework.web.multipart.MultipartFile;
import java.io.InputStream;
import java.util.List;
/** * @Author crush * @Date 2021/7/25 9:58 * @Description: MinioService */
public interface MinioService {
/** * 判斷 bucket是否存在 * * @param bucketName * @return */
boolean bucketExists(String bucketName);
/** * 建立 bucket * * @param bucketName */
void makeBucket(String bucketName);
/** * 列出全部存儲桶名稱 * @return */
List<String> listBucketName();
/** * 列出全部存儲桶 信息 * * @return */
List<Bucket> listBuckets();
/** * 根據桶名刪除桶 * @param bucketName */
boolean removeBucket(String bucketName);
/** * 列出存儲桶中的全部對象名稱 * @param bucketName * @return */
List<String> listObjectNames(String bucketName);
/** * 文件上傳 * * @param multipartFile * @param bucketName */
String putObject( MultipartFile multipartFile, String bucketName,String fileType);
/** * 文件流下載 * @param bucketName * @param objectName * @return */
InputStream downloadObject(String bucketName, String objectName);
/** * 刪除文件 * @param bucketName * @param objectName */
boolean removeObject(String bucketName, String objectName);
/** * 批量刪除文件 * @param bucketName * @param objectNameList * @return */
boolean removeListObject(String bucketName, List<String> objectNameList);
/** * 獲取文件路徑 * @param bucketName * @param objectName * @return */
String getObjectUrl(String bucketName,String objectName);
}
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import com.crush.minio.config.MinioProperties;
import com.crush.minio.service.MinioService;
import com.crush.minio.utils.MinioUtil;
import io.minio.MinioClient;
import io.minio.messages.Bucket;
import org.apache.commons.lang3.StringUtils;
import org.springframework.stereotype.Service;
import org.springframework.web.multipart.MultipartFile;
import java.io.InputStream;
import java.util.List;
import java.util.UUID;
/** * @Author crush * @Date 2021/7/25 9:58 * @Description: MinioServiceImpl */
@Service
public class MinioServiceImpl implements MinioService {
private final MinioUtil minioUtil;
private final MinioClient minioClient;
private final MinioProperties minioProperties;
public MinioServiceImpl(MinioUtil minioUtil, MinioClient minioClient, MinioProperties minioProperties) {
this.minioUtil = minioUtil;
this.minioClient = minioClient;
this.minioProperties = minioProperties;
}
@Override
public boolean bucketExists(String bucketName) {
return minioUtil.bucketExists(bucketName);
}
@Override
public void makeBucket(String bucketName) {
minioUtil.makeBucket(bucketName);
}
@Override
public List<String> listBucketName() {
return minioUtil.listBucketNames();
}
@Override
public List<Bucket> listBuckets() {
return minioUtil.listBuckets();
}
@Override
public boolean removeBucket(String bucketName) {
return minioUtil.removeBucket(bucketName);
}
@Override
public List<String> listObjectNames(String bucketName) {
return minioUtil.listObjectNames(bucketName);
}
@Override
public String putObject(MultipartFile file, String bucketName,String fileType) {
try {
bucketName = StringUtils.isNotBlank(bucketName) ? bucketName : minioProperties.getBucketName();
if (!this.bucketExists(bucketName)) {
this.makeBucket(bucketName);
}
String fileName = file.getOriginalFilename();
String objectName = UUID.randomUUID().toString().replaceAll("-", "")
+ fileName.substring(fileName.lastIndexOf("."));
minioUtil.putObject(bucketName, file, objectName,fileType);
return minioProperties.getEndpoint()+"/"+bucketName+"/"+objectName;
} catch (Exception e) {
e.printStackTrace();
return "上傳失敗";
}
}
@Override
public InputStream downloadObject(String bucketName, String objectName) {
return minioUtil.getObject(bucketName,objectName);
}
@Override
public boolean removeObject(String bucketName, String objectName) {
return minioUtil.removeObject(bucketName, objectName);
}
@Override
public boolean removeListObject(String bucketName, List<String> objectNameList) {
return minioUtil.removeObject(bucketName,objectNameList);
}
@Override
public String getObjectUrl(String bucketName,String objectName) {
return minioUtil.getObjectUrl(bucketName, objectName);
}
}
複製代碼
import com.crush.minio.service.MinioService;
import com.crush.minio.utils.FileTypeUtils;
import org.apache.tomcat.util.http.fileupload.IOUtils;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.multipart.MultipartFile;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.InputStream;
import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
/** * @author crush */
@RequestMapping("/minio")
@RestController
public class MinioController {
private final MinioService minioService;
public MinioController(MinioService minioService) {
this.minioService = minioService;
}
@PostMapping("/upload")
public String uploadFile(MultipartFile file, String bucketName) {
String fileType = FileTypeUtils.getFileType(file);
if (fileType != null) {
return minioService.putObject(file, bucketName, fileType);
}
return "不支持的文件格式。請確認格式,從新上傳!!!";
}
@PostMapping("/addBucket/{bucketName}")
public String addBucket(@PathVariable String bucketName) {
minioService.makeBucket(bucketName);
return "建立成功!!!";
}
@GetMapping("/show/{bucketName}")
public List<String> show(@PathVariable String bucketName) {
return minioService.listObjectNames(bucketName);
}
@GetMapping("/showBucketName")
public List<String> showBucketName() {
return minioService.listBucketName();
}
@GetMapping("/showListObjectNameAndDownloadUrl/{bucketName}")
public Map<String, String> showListObjectNameAndDownloadUrl(@PathVariable String bucketName) {
Map<String, String> map = new HashMap<>();
List<String> listObjectNames = minioService.listObjectNames(bucketName);
String url = "localhost:8085/minio/download/" + bucketName + "/";
listObjectNames.forEach(System.out::println);
for (int i = 0; i <listObjectNames.size() ; i++) {
map.put(listObjectNames.get(i),url+listObjectNames.get(i));
}
return map;
}
@DeleteMapping("/removeBucket/{bucketName}")
public String delBucketName(@PathVariable String bucketName) {
return minioService.removeBucket(bucketName) == true ? "刪除成功" : "刪除失敗";
}
@DeleteMapping("/removeObject/{bucketName}/{objectName}")
public String delObject(@PathVariable("bucketName") String bucketName, @PathVariable("objectName") String objectName) {
return minioService.removeObject(bucketName, objectName) == true ? "刪除成功" : "刪除失敗";
}
@DeleteMapping("/removeListObject/{bucketName}")
public String delListObject(@PathVariable("bucketName") String bucketName, @RequestBody List<String> objectNameList) {
return minioService.removeListObject(bucketName, objectNameList) == true ? "刪除成功" : "刪除失敗";
}
@RequestMapping("/download/{bucketName}/{objectName}")
public void download(HttpServletResponse response, @PathVariable("bucketName") String bucketName, @PathVariable("objectName") String objectName) {
InputStream in = null;
try {
in = minioService.downloadObject(bucketName, objectName);
response.setHeader("Content-Disposition", "attachment;filename="
+ URLEncoder.encode(objectName, "UTF-8"));
response.setCharacterEncoding("UTF-8");
//將字節從InputStream複製到OutputStream 。
IOUtils.copy(in, response.getOutputStream());
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} finally {
if (in != null) {
try {
in.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
}
複製代碼
主啓動沒啥要改的,直接跑就歐克拉
莫慌,居然帶你們作了,確定是要帶你們看看測試結果的。
👇
我目前Minio 的所含有的桶
在可視化平臺上也能夠看到已經上傳成功了。
這個就是文件下載接口。
其餘的沒有一一測試,可是方法命名應該能夠給予你提示。
如若遇到錯誤或疑惑之處,請留言或私信,會及時給予回覆。
Java這條路啊,真是越往前越卷啊。🛌