spring boot 2.0 与FASTDFS进行整合

只支持在spring-boot 2.0以及以上版本中使用

1.pom.xml 里引入FASTDFS的依赖，toobato与fastdfs作者一起，将fastdfs的功能进行了重构与简化

<!-- 高性能分布式文件服务器 -->
<dependency>
<groupId>com.github.tobato</groupId>
<artifactId>fastdfs-client</artifactId>
<version>1.26.2</version>
</dependency>
2.引入spring-test的依赖，里面有将可以将文件对象转换为MutipartFile的方法
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
</dependency>

3.创建一个FastdfsImporter 类（随便起名），在类里面1定义如下配置，就可以将作者的fastDFS中的bean进行引入

@Configuration
@Import(FdfsClientConfig.class)//@Import可以导入一个带有@configuration注解的类;
// 解决jmx重复注册bean的问题
@EnableMBeanExport(registration = RegistrationPolicy.IGNORE_EXISTING)
public class FastdfsImporter {
// 导入依赖组件
}

4.spring boot 配置文件中引入如下

fdfs.soTimeout=1501
fdfs.connectTimeout=601
#image size ，在方法中可以使用生成自定义的图片大小
fdfs.thumbImage.width=80
fdfs.thumbImage.height=80
# fastdfs address and port
fdfs.trackerList[0]=192.168.241.129:22122

5.接下来，提供给两个类，直接复制到自己的程序中，进行调用即可

----------------FastDFSClient----------------------直接用此类方法就可以将文件传入fastdfs图片服务器中

package com.project.util;

import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.nio.charset.Charset;

import org.apache.commons.io.FilenameUtils;
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 com.github.tobato.fastdfs.domain.StorePath;
import com.github.tobato.fastdfs.exception.FdfsUnsupportStorePathException;
import com.github.tobato.fastdfs.service.FastFileStorageClient;

@Component
public class FastDFSClient {

@Autowired
private FastFileStorageClient storageClient;

//    @Autowired
//    private AppConfig appConfig; // 项目参数配置

/**
* 上传文件
*
* @param file
* 文件对象
* @return 文件访问地址
* @throws IOException
*/
public String uploadFile(MultipartFile file) throws IOException {
StorePath storePath = storageClient.uploadFile(file.getInputStream(), file.getSize(),
FilenameUtils.getExtension(file.getOriginalFilename()), null);

return storePath.getPath();
}

public String uploadFile2(MultipartFile file) throws IOException {
StorePath storePath = storageClient.uploadImageAndCrtThumbImage(file.getInputStream(), file.getSize(),
FilenameUtils.getExtension(file.getOriginalFilename()), null);

return storePath.getPath();
}

public String uploadQRCode(MultipartFile file) throws IOException {
StorePath storePath = storageClient.uploadFile(file.getInputStream(), file.getSize(),
"png", null);

return storePath.getPath();
}

public String uploadFace(MultipartFile file) throws IOException {
StorePath storePath = storageClient.uploadImageAndCrtThumbImage(file.getInputStream(), file.getSize(),
"png", null);

return storePath.getPath();
}

public String uploadBase64(MultipartFile file) throws IOException {
StorePath storePath = storageClient.uploadImageAndCrtThumbImage(file.getInputStream(), file.getSize(),
"png", null);

return storePath.getPath();
}

/**
* 将一段字符串生成一个文件上传
*
* @param content
* 文件内容
* @param fileExtension
* @return
*/
public String uploadFile(String content, String fileExtension) {
byte[] buff = content.getBytes(Charset.forName("UTF-8"));
ByteArrayInputStream stream = new ByteArrayInputStream(buff);
StorePath storePath = storageClient.uploadFile(stream, buff.length, fileExtension, null);
return storePath.getPath();
}

// 封装图片完整URL地址
//    private String getResAccessUrl(StorePath storePath) {
//    String fileUrl = AppConstants.HTTP_PRODOCOL + appConfig.getResHost() + ":" + appConfig.getFdfsStoragePort()
//    + "/" + storePath.getFullPath();
//    return fileUrl;
//    }

/**
* 删除文件
*
* @param fileUrl
* 文件访问地址
* @return
*/
public void deleteFile(String fileUrl) {
if (StringUtils.isEmpty(fileUrl)) {
return;
}
try {
StorePath storePath = StorePath.praseFromUrl(fileUrl);
storageClient.deleteFile(storePath.getGroup(), storePath.getPath());
} catch (FdfsUnsupportStorePathException e) {
e.getMessage();
}
}
}

------------------ FileUtils----------提供了对文件操作，可以将file 对象转换为MutipartFile，base64字符串转换为文件(根据需要引入此类)

package com.project.util;

import java.io.BufferedOutputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.URL;

import org.springframework.mock.web.MockMultipartFile;
import org.springframework.stereotype.Service;
import org.springframework.util.Base64Utils;
import org.springframework.web.multipart.MultipartFile;

@Service
public class FileUtils {
/**
* 根据url拿取file
*
* @param url
* @param suffix
* 文件后缀名
*/
public static File createFileByUrl(String url, String suffix) {
byte[] byteFile = getImageFromNetByUrl(url);
if (byteFile != null) {
File file = getFileFromBytes(byteFile, suffix);
return file;
} else {
return null;
}
}

/**
* 根据地址获得数据的字节流
*
* @param strUrl
* 网络连接地址
* @return
*/
private static byte[] getImageFromNetByUrl(String strUrl) {
try {
URL url = new URL(strUrl);
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
conn.setRequestMethod("GET");
conn.setConnectTimeout(5 * 1000);
InputStream inStream = conn.getInputStream();// 通过输入流获取图片数据
byte[] btImg = readInputStream(inStream);// 得到图片的二进制数据
return btImg;
} catch (Exception e) {
e.printStackTrace();
}
return null;
}

/**
* 从输入流中获取数据
*
* @param inStream
* 输入流
* @return
* @throws Exception
*/
private static byte[] readInputStream(InputStream inStream) throws Exception {
ByteArrayOutputStream outStream = new ByteArrayOutputStream();
byte[] buffer = new byte[1024];
int len = 0;
while ((len = inStream.read(buffer)) != -1) {
outStream.write(buffer, 0, len);
}
inStream.close();
return outStream.toByteArray();
}

// 创建临时文件
private static File getFileFromBytes(byte[] b, String suffix) {
BufferedOutputStream stream = null;
File file = null;
try {
file = File.createTempFile("pattern", "." + suffix);
System.out.println("临时文件位置：" + file.getCanonicalPath());
FileOutputStream fstream = new FileOutputStream(file);
stream = new BufferedOutputStream(fstream);
stream.write(b);
} catch (Exception e) {
e.printStackTrace();
} finally {
if (stream != null) {
try {
stream.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
return file;
}

public static MultipartFile createImg(String url) {
try {
// File转换成MutipartFile
File file = FileUtils.createFileByUrl(url, "jpg");
FileInputStream inputStream = new FileInputStream(file);
MultipartFile multipartFile = new MockMultipartFile(file.getName(), inputStream);
return multipartFile;
} catch (IOException e) {
e.printStackTrace();
return null;
}
}

/////////使用spring-test/////////////////
public static MultipartFile fileToMultipart(String filePath) {
try {
// File转换成MutipartFile
File file = new File(filePath);
FileInputStream inputStream = new FileInputStream(file);
MultipartFile multipartFile = new MockMultipartFile(file.getName(), "png", "image/png", inputStream);
return multipartFile;
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
return null;
}
}

public static void main(String[] args) {
// WebFileUtils.createFileByUrl("http://122.152.205.72:88/group1/M00/00/01/CpoxxFr7oIaAZ0rOAAC0d3GKDio580.png",
// "png");
// WebFileUtils.createImg("http://122.152.205.72:88/group1/M00/00/01/CpoxxFr7oIaAZ0rOAAC0d3GKDio580.png");
}

public static boolean base64ToFile(String filePath, String base64Data) throws Exception {
String dataPrix = "";
String data = "";

if(base64Data == null || "".equals(base64Data)){
return false;
}else{
String [] d = base64Data.split("base64,");
if(d != null && d.length == 2){
dataPrix = d[0];
data = d[1];
}else{
return false;
}
}

// 因为BASE64Decoder的jar问题，此处使用spring框架提供的工具包
byte[] bs = Base64Utils.decodeFromString(data);
// 使用apache提供的工具类操作流
org.apache.commons.io.FileUtils.writeByteArrayToFile(new File(filePath), bs);

return true;
}
}