Day14_04_FastDFS上传文件的Java代码实现

04_FastDFS上传文件的Java代码实现 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

    org.csource
    fastdfs-client-java
    1.27-SNAPSHOT

4. 配置文件

1️⃣. conf配置文件

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

2️⃣. properties配置文件

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 配置文件不仅相同，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\\James\\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\\James\\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/jackiechan/文档/workspace/gp1701/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/jackiechan/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/jackiechan/文档/    workspace/gp1701/testfastdfs/src/main/resources/server.conf");
     String upload_file = fastDFSClient.upload_file("/home/jackiechan/   12333.jpg");
     System.err.println(upload_file);
}

三. SpringMVC 中使用

环境配置和前面四步一致.

1. 代码实现

@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;
        //用于返回 json 数据的map对象
        Map map=new HashMap();
        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://jiaoxue.chenjunbo.xin/"+path);
        } catch (Exception e) {
            map.put("error", 1);
            map.put("message", "发斯蒂芬斯蒂芬斯蒂芬");
            e.printStackTrace();
        }
        //将数据转成 json 数据返回,此处可以自己写或者直接返回map
        return JsonUtils.objectToJson(map);
    }
}