上篇博客我介绍了FastDFS的概念、原理以及安装步骤,这篇文章我们来聊一聊如何在java中使用FastDFSClient进行静态资源的上传。
1.开发环境
spring+springmvc+maven
2.首先在maven的pom.xml中引入依赖fastdfs-client的依赖
1 <dependency>
2 <groupId>org.csource</groupId>
3 <artifactId>fastdfs-client-java</artifactId>
4 <version>5.0.4</version>
5 </dependency>
3.接着我们来指定一个fastdfs-client.conf配置文件,里面内容如下:
tracker_server=host:port(这里指trackerServer服务器的ip和端口)
4.然后写一个单元测试类来测试服务
package com.hafiz.fastdfs;
import java.io.FileNotFoundException;
import java.io.IOException;
import org.csource.common.MyException;
import org.csource.fastdfs.ClientGlobal;
import org.csource.fastdfs.StorageClient;
import org.csource.fastdfs.StorageServer;
import org.csource.fastdfs.TrackerClient;
import org.csource.fastdfs.TrackerServer;
import org.junit.Test;
import com.taotao.common.utils.FastDFSClient;
public class FastdfsTest {
private static final String CONFIGLOCATION = "D:\\fastdfs_client.conf";
@Test
public void testUploadImg () {
try {
// 初始化全局配置。加载client配置文件
ClientGlobal.init(CONFIGLOCATION);
// 创建一个TrackerClient对象
TrackerClient trackerClient = new TrackerClient();
// 创建一个TrackerServer对象
TrackerServer trackerServer = trackerClient.getConnection();
// 声明一个StorageServer对象并初始为null
StorageServer storageServer = null;
// 获得StorageClient对象
StorageClient storageClient = new StorageClient(trackerServer, storageServer);
// 直接调用StorageClient对象方法上传文件即可
String[] result = storageClient.upload_file("D:\\Documents\\Downloads\\高圆圆2.jpg", "jpg", null);
for(String item : result) {
System.out.println(item);
}
trackerServer.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} catch (MyException e) {
e.printStackTrace();
}
}
@Test
public void fastDfsClientTest() {
try {
FastDFSClient client = new FastDFSClient(CONFIGLOCATION);
String imgUrl = client.uploadFile("D:\\Documents\\Downloads\\高圆圆1.jpg", "jpg", null);
System.out.println(imgUrl);
} catch (Exception e) {
e.printStackTrace();
}
}
}
5.为了以后在项目中使用方便,我们不能每次都写这么一大串东西,所以我们来对该客户端进行以下封装:
package com.hafiz.common.utils;
import org.csource.common.NameValuePair;
import org.csource.fastdfs.ClientGlobal;
import org.csource.fastdfs.StorageClient1;
import org.csource.fastdfs.StorageServer;
import org.csource.fastdfs.TrackerClient;
import org.csource.fastdfs.TrackerServer;
public class FastDFSClient {
private TrackerClient trackerClient = null;
private TrackerServer trackerServer = null;
private StorageServer storageServer = null;
private StorageClient1 storageClient = null;
public FastDFSClient(String conf) throws Exception {
if (conf.contains("classpath:")) {
String url = this.getClass().getResource("/").getPath();
url = url.substring(1);
conf = conf.replace("classpath:", url);
}
ClientGlobal.init(conf);
trackerClient = new TrackerClient();
trackerServer = trackerClient.getConnection();
storageServer = null;
storageClient = new StorageClient1(trackerServer, storageServer);
}
public String uploadFile(String fileName, String extName, NameValuePair[] metas) throws Exception {
return storageClient.upload_file1(fileName, extName, metas);
}
public String uploadFile(String fileName, String extName) throws Exception {
return storageClient.upload_file1(fileName, extName, null);
}
public String uploadFile(String fileName) throws Exception {
return storageClient.upload_file1(fileName, null, null);
}
public String uploadFile(byte[] fileContent, String extName, NameValuePair[] metas) throws Exception {
return storageClient.upload_file1(fileContent, extName, metas);
}
public String uploadFile(byte[] fileContent, String extName) throws Exception {
return storageClient.upload_file1(fileContent, extName, null);
}
public String uploadFile(byte[] fileContent) throws Exception {
return storageClient.upload_file1(fileContent, null, null);
}
}
通过以上的步骤,我们就完成在java中使用fastdfs客户端进行静态资源上传的功能,这里面我们得到一个最重要的思想就是:DRY(Don't Repeat Yourself!),要有封装的思想。