Day14_04_FastDFS上传文件的Java代码实现

谁借莪１个温暖的怀抱￠ 2024-02-19 20:16 22阅读 0赞

## 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 ####

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

#### 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<String, Object> 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);
        }
    }