通过java实现FastDFS的上传下载增删改查等操作

本次博客带大家来通过java来实现对分布式存储系统的上传下载增删改查等常见操作。
（1）下载fastdfs-client-java文件：fastdfs-client-java

（2）导入eclipse并且export成fastdfs_client.jar
这里写图片描述

(3)cmd下安装fastdfs_client.jar到mvn环境
pom.xml如下，主要是依赖包那一块，其他的是系统生成的

win+R
cmd
mvn install:install-file -DgroupId=org.csource -DartifactId=fastdfs-client-java -Dversion=5.0.4 -Dpackaging=jar -Dfile=C:\Users\administr\Desktop\fastdfs_client.jar

这里写图片描述

(4)新建一个项目maven的fastdfs-demo测试这个jar包的使用

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>

  <groupId>org.csource</groupId>
  <artifactId>fastdfs-client-java</artifactId>
  <version>1.27-SNAPSHOT</version>
  <name>fastdfs-client-java</name>
  <description>fastdfs client for java</description>
  <packaging>jar</packaging>

  <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
    <maven.test.failure.ignore>true</maven.test.failure.ignore>
    <maven.test.skip>true</maven.test.skip>
    <jdk.version>1.6</jdk.version>
  </properties>

  <build>
    <plugins>
      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-compiler-plugin</artifactId>
        <version>3.5.1</version>
        <configuration>
          <encoding>UTF-8</encoding>
          <source>${jdk.version}</source>
          <target>${jdk.version}</target>
        </configuration>
      </plugin>
    </plugins>
  </build>

</project>

(5)在src/main/resources中新建fdfs_client.conf文件，内容如下

connect_timeout = 2

network_timeout = 30

charset = UTF-8

http.tracker_http_port = 80

http.anti_steal_token = no

http.secret_key = FastDFS1234567890
#这个是我的tracerServer的ip,详细请参考我之前的搭建过程[FastDFS安装与配置](http://blog.csdn.net/mr_zhang2014/article/details/79007221)
tracker_server =192.168.50.203:22122

（6）
在src/main/java中创建TestFastDfs.java如下

package com.xj.fastdfs_demo;

import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.UUID;

import org.apache.commons.io.IOUtils;
import org.csource.common.MyException;
import org.csource.common.NameValuePair;
import org.csource.fastdfs.ClientGlobal;
import org.csource.fastdfs.FileInfo;
import org.csource.fastdfs.StorageClient;
import org.csource.fastdfs.StorageServer;
import org.csource.fastdfs.TrackerClient;
import org.csource.fastdfs.TrackerServer;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;

public class TestFastDfs {
     //刚刚的配置文件位置
    public String conf_filename = "D:\\MyProject\\fastdfs-demo\\src\\main\\resources\\fdfs_client.conf"; 

     //要上传的文件地址
    public String local_filename = "C:\\Users\\zxj\\Desktop\\新建文本.txt";

    @Before
    public void setUp() throws Exception {
    }

    @After
    public void tearDown() throws Exception {
    }

    @Test
    public void testUpload() {

        try { 
            ClientGlobal.init(conf_filename);

            TrackerClient tracker = new TrackerClient(); 
            TrackerServer trackerServer = tracker.getConnection(); 
            StorageServer storageServer = null;

            StorageClient storageClient = new StorageClient(trackerServer, storageServer); 
//          NameValuePair nvp = new NameValuePair("age", "18"); 
            NameValuePair nvp [] = new NameValuePair[]{ 
                    new NameValuePair("age", "18"), 
                    new NameValuePair("sex", "male") 
            }; 
            String fileIds[] = storageClient.upload_file(local_filename, "png", nvp);

            System.out.println(fileIds.length); 
            System.out.println("组名：" + fileIds[0]); 
            System.out.println("路径: " + fileIds[1]);

        } catch (FileNotFoundException e) { 
            e.printStackTrace(); 
        } catch (IOException e) { 
            e.printStackTrace(); 
        } catch (MyException e) { 
            e.printStackTrace(); 
        } 
    }


    public void testDownload() {
        try {

            ClientGlobal.init(conf_filename);

            TrackerClient tracker = new TrackerClient(); 
            TrackerServer trackerServer = tracker.getConnection(); 
            StorageServer storageServer = null;

            StorageClient storageClient = new StorageClient(trackerServer, storageServer); 
            byte[] b = storageClient.download_file("group1", "M00/00/00/wKgRcFV_08OAK_KCAAAA5fm_sy874.conf"); 
            System.out.println(b); 
            IOUtils.write(b, new FileOutputStream("D:/"+UUID.randomUUID().toString()+".conf"));
        } catch (Exception e) { 
            e.printStackTrace(); 
        } 
    }


    public void testGetFileInfo(){ 
        try { 
            ClientGlobal.init(conf_filename);

            TrackerClient tracker = new TrackerClient(); 
            TrackerServer trackerServer = tracker.getConnection(); 
            StorageServer storageServer = null;

            StorageClient storageClient = new StorageClient(trackerServer, storageServer); 
            FileInfo fi = storageClient.get_file_info("group1", "M00/00/00/wKgRcFV_08OAK_KCAAAA5fm_sy874.conf"); 
            System.out.println(fi.getSourceIpAddr()); 
            System.out.println(fi.getFileSize()); 
            System.out.println(fi.getCreateTimestamp()); 
            System.out.println(fi.getCrc32()); 
        } catch (Exception e) { 
            e.printStackTrace(); 
        } 
    } 


    public void testGetFileMate(){ 
        try { 
            ClientGlobal.init(conf_filename);

            TrackerClient tracker = new TrackerClient(); 
            TrackerServer trackerServer = tracker.getConnection(); 
            StorageServer storageServer = null;

            StorageClient storageClient = new StorageClient(trackerServer, 
                    storageServer); 
            NameValuePair nvps [] = storageClient.get_metadata("group1", "M00/00/00/wKgRcFV_08OAK_KCAAAA5fm_sy874.conf"); 
            for(NameValuePair nvp : nvps){ 
                System.out.println(nvp.getName() + ":" + nvp.getValue()); 
            } 
        } catch (Exception e) { 
            e.printStackTrace(); 
        } 
    } 


    public void testDelete(){ 
        try { 
            ClientGlobal.init(conf_filename);

            TrackerClient tracker = new TrackerClient(); 
            TrackerServer trackerServer = tracker.getConnection(); 
            StorageServer storageServer = null;

            StorageClient storageClient = new StorageClient(trackerServer, 
                    storageServer); 
            int i = storageClient.delete_file("group1", "M00/00/00/wKgRcFV_08OAK_KCAAAA5fm_sy874.conf"); 
            System.out.println( i==0 ? "删除成功" : "删除失败:"+i); 
        } catch (Exception e) { 
            e.printStackTrace(); 
        } 
    }
}

（7）验证工作
点击运行junit框架测试上传操作是否成功
这里写图片描述

此时已经上传成功，我们到存储节点slaver2查看文件验证

$# cd /home/sfs/fastdfs_storage/data/00/00

这里写图片描述
我们发现文件已经上传成功，表明java操作FastDFS成功，后面的下载和删除修改等操作都类似。

通过java实现FastDFS的上传下载增删改查等操作

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