Linux下FastDFS安装（4）Java代码内使用

一.添加依赖

1.下载依赖

下载地址:https://github.com/happyfish100/fastdfs-client-java

2.安装依赖

将项目导入到 IDE 中,或者直接使用 maven 指令将依赖安装到仓库中

3.项目中添加依赖

<dependency>
   <groupId>org.csource</groupId>
   <artifactId>fastdfs-client-java</artifactId>
   <version>1.27-SNAPSHOT</version>
</dependency>

4.配置文件

4.1 conf 格式

connect_timeout = 2
network_timeout = 30
charset = UTF-8
http.tracker_http_port = 80
http.anti_steal_token = no
http.secret_key = FastDFS1234567890
​
tracker_server = 10.0.11.247:22122
tracker_server = 10.0.11.248:22122
tracker_server = 10.0.11.249:22122
#注1：tracker_server指向您自己IP地址和端口，1-n个
#注2：除了tracker_server，其它配置项都是可选的

4.2 properties 格式

fastdfs.connect_timeout_in_seconds = 5
fastdfs.network_timeout_in_seconds = 30
fastdfs.charset = UTF-8
fastdfs.http_anti_steal_token = false
fastdfs.http_secret_key = FastDFS1234567890
fastdfs.http_tracker_http_port = 80
​
fastdfs.tracker_servers = 10.0.11.201:22122,10.0.11.202:22122,10.0.11.203:22122
#注1：properties 配置文件中属性名跟 conf 配置文件不尽相同，并且统一加前缀"fastdfs."，便于整合到用户项目配置文件
#注2：fastdfs.tracker_servers 配置项不能重复属性名，多个 tracker_server 用逗号","隔开
#注3：除了fastdfs.tracker_servers，其它配置项都是可选的

5.加载配置示例(后面用)

//加载原 conf 格式文件配置：
ClientGlobal.init("fdfs_client.conf");
ClientGlobal.init("config/fdfs_client.conf");
ClientGlobal.init("/opt/fdfs_client.conf");
ClientGlobal.init("C:\\Users\\Kam\\config\\fdfs_client.conf");

//加载 properties 格式文件配置：
ClientGlobal.initByProperties("fastdfs-client.properties");
ClientGlobal.initByProperties("config/fastdfs-client.properties");
ClientGlobal.initByProperties("/opt/fastdfs-client.properties");
ClientGlobal.initByProperties("C:\\Users\\Kam\\config\\fastdfs-client.properties");

//加载 Properties 对象配置：
Properties props = new Properties();
props.put(ClientGlobal.PROP_KEY_TRACKER_SERVERS, "10.0.11.101:22122,10.0.11.102:22122");
ClientGlobal.initByProperties(props);
​
//加载 trackerServers 字符串配置：
String trackerServers = "10.0.11.101:22122,10.0.11.102:22122";
ClientGlobal.initByTrackers(trackerServers);

6.检查加载配置结果：

System.out.println("ClientGlobal.configInfo(): " + ClientGlobal.configInfo());
​
ClientGlobal.configInfo(): {
 g_connect_timeout(ms) = 5000
 g_network_timeout(ms) = 30000
 g_charset = UTF-8
 g_anti_steal_token = false
 g_secret_key = FastDFS1234567890
 g_tracker_http_port = 80
 trackerServers = 10.0.11.101:22122,10.0.11.102:22122
}

二. 测试方式演示

1.直接测试

@Test
public void test1() throws Exception {
//加载配置文件,需要告诉它向导服务器在哪
ClientGlobal.init("/home/Kam/workspace/testfastdfs/src/main/resources/server.conf");
//创建客户端
TrackerClient trackerClient=new TrackerClient();
TrackerServer trackerServer = trackerClient.getConnection();
StorageServer server=null;
StorageClient storageClient=new StorageClient(trackerServer, server);
String[] strings = storageClient.upload_file("/home/img/12333.jpg", "jpg", null);//参数1 文件路径,参数2 文件的扩展名,参数3文件的元数据
for (String string : strings) {
System.err.println(string);//返回的结果就是整个地址,不包括域名 ip
}
// group1/M00/00/00/rBFdZ1oU8z2AAKfLABx_3eMqYVk200.jpg
}

2.封装简单工具类

/**
工具类中只封装了部分方法,更多方法请自己封装
*/
public class FastDFSClient {
private TrackerClient trackerClient;
private TrackerServer trackerServer;
private StorageClient1 storageClient;
private StorageServer storageServer;

public FastDFSClient(String conf) throws Exception {
if (conf.startsWith("classpath")) {//如果配置文件是 classpath 开头的,则代表是在类路径中,去掉 classpath: 然后拼接类路径
conf=conf.replace("classpath:", getClass().getResource("/").getPath());
}
ClientGlobal.init(conf);//加载路径
trackerClient=new TrackerClient();
trackerServer=trackerClient.getConnection();
storageClient=new StorageClient1(trackerServer, storageServer);
}
/**
上传文件,参数是文件的路径,后缀名和元数据
*/
public String  upload_file(String fileName,String ext_name,NameValuePair[] pairs) throws Exception {
return storageClient.upload_file1(fileName, ext_name, pairs);
}

public String upload_file(String fileName)  throws Exception{
return upload_file(fileName, null, null);
}


public String upload_file(String fileName,String ext_name)  throws Exception{
return upload_file(fileName, ext_name, null);
}

public String upload_file(String fileName,NameValuePair[] pairs)  throws Exception{
return upload_file(fileName, null, pairs);
}
/**
上传二进制数据,需要将文件先转换为二进制
*/
public String upload_file(byte[]source,String ext_name,NameValuePair[] pairs) throws Exception{
return storageClient.upload_file1(source, ext_name, pairs);
}
}

3. 测试工具类

@Test
public void test2()  throws Exception{
FastDFSClient fastDFSClient =new FastDFSClient("/home/Kam/workspace/testfastdfs/src/main/resources/server.conf");
String upload_file = fastDFSClient.upload_file("/home/img/12333.jpg");
System.err.println(upload_file);
}

三. SpringMvc 中使用

环境配置和前面四步一致
代码

@Controller
public class FileUploadController {
/**
* MultipartFile的形参的名字和form表单中文件的域name一致
* @param file
* @return
*/
@ResponseBody
@RequestMapping(value="/upload",produces= {"text/plain;charset=utf-8"})
public String upLoad(MultipartFile file) {
String path=null;
Map<String, Object> map=new HashMap<>();//用于返回 json 数据的map 对象
try {
//file是用户上传的文件
//需要将文件转存到文件服务器
//file.transferTo(dest); 存储到本地文件
/*file.getOriginalFilename()
file.getName()*/
FastDFSClient fastDFSClient=new FastDFSClient("classpath:server.conf");//此处应当注入对象过来
path= fastDFSClient.upload_file(file.getBytes(), "jpg", null);
map.put("error", 0);//设置返回内容
map.put("url", "http://met.onlykam.jin/"+path);
} catch (Exception e) {
map.put("error", 1);
map.put("message", "Hello Kugou");
e.printStackTrace();
}
return JsonUtils.objectToJson(map);//将数据转成 json 数据返回,此处可以自己写或者直接返回map
}
}