fastDFS完成文件上传

搭建图片服务器完成文件上传:

1.Tracker集群

1.心跳检测机制
2.选举机制

2.Storage集群 + 分布式

集群: 多台服务器干同一件事(一个挂了不影响另一个)
分布式: 多台服务器共同完成一件事(一台服务器的内存不够, 用另外一台)

3.开发步骤

3.1 引入依赖

<dependency>
	<groupId>org.csource.fastdfsgroupId>
	<artifactId>fastdfsartifactId>
dependency>
<dependency>
	<groupId>commons-fileuploadgroupId>
	<artifactId>commons-fileuploadartifactId>
dependency>

3.2 fastDFS配置文件: fdfs_client.conf

# connect timeout in seconds
# default value is 30s
connect_timeout=30

# network timeout in seconds
# default value is 30s
network_timeout=60

# the base path to store log files
base_path=/home/fastdfs

# tracker_server can ocur more than once, and tracker_server format is
#  "host:port", host can be hostname or ip address
tracker_server=192.168.25.133:22122

#standard log level as syslog, case insensitive, value list:
### emerg for emergency
### alert
### crit for critical
### error
### warn for warning
### notice
### info
### debug
log_level=info

# if use connection pool
# default value is false
# since V4.05
use_connection_pool = false

# connections whose the idle time exceeds this time will be closed
# unit: second
# default value is 3600
# since V4.05
connection_pool_max_idle_time = 3600

# if load FastDFS parameters from tracker server
# since V4.05
# default value is false
load_fdfs_parameters_from_tracker=false

# if use storage ID instead of IP address
# same as tracker.conf
# valid only when load_fdfs_parameters_from_tracker is false
# default value is false
# since V4.05
use_storage_id = false

# specify storage ids filename, can use relative or absolute path
# same as tracker.conf
# valid only when load_fdfs_parameters_from_tracker is false
# since V4.05
storage_ids_filename = storage_ids.conf

#HTTP settings
http.tracker_server_port=80
#use "#include" directive to include HTTP other settiongs
##include http.conf

3.3 springmvc配置文件: springmvc.xml 重点配置多媒体解析器

<beans xmlns="http://www.springframework.org/schema/beans"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
	xmlns:p="http://www.springframework.org/schema/p"
	xmlns:context="http://www.springframework.org/schema/context"
	xmlns:dubbo="http://code.alibabatech.com/schema/dubbo" 
	xmlns:mvc="http://www.springframework.org/schema/mvc"
	xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd
        http://code.alibabatech.com/schema/dubbo http://code.alibabatech.com/schema/dubbo/dubbo.xsd
        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">
     
    <context:property-placeholder location="classpath:config/application.properties" />
	
	<mvc:annotation-driven>
	  <mvc:message-converters register-defaults="true">
	    <bean class="com.alibaba.fastjson.support.spring.FastJsonHttpMessageConverter">  
	      <property name="supportedMediaTypes" value="application/json"/>
	      <property name="features">
	        <array>
	          <value>WriteMapNullValuevalue>
	          <value>WriteDateUseDateFormatvalue>
	        array>
	      property>
	    bean>
	  mvc:message-converters>  
	mvc:annotation-driven>
	
	
	<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
		<property name="defaultEncoding" value="UTF-8">property>
		
		<property name="maxUploadSize" value="5242880">property>
	bean>
	
	
	<dubbo:application name="oranges-shop-web" />
	<dubbo:registry address="zookeeper://192.168.25.135:2181"/>
	<dubbo:annotation package="com.oranges.shop.controller" />  	
beans>

3.4 文件上传工具类: FastDFSClient.java

package util;

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:")) {
			conf = conf.replace("classpath:", this.getClass().getResource("/").getPath());
		}
		ClientGlobal.init(conf);
		trackerClient = new TrackerClient();
		trackerServer = trackerClient.getConnection();
		storageServer = null;
		storageClient = new StorageClient1(trackerServer, storageServer);
	}
	
	/**
	 * 上传文件方法
	 * 
Title: uploadFile
	 * 
Description: 
	 * @param fileName 文件全路径
	 * @param extName 文件扩展名，不包含（.）
	 * @param metas 文件扩展信息
	 * @return
	 * @throws Exception
	 */
	public String uploadFile(String fileName, String extName, NameValuePair[] metas) throws Exception {
		String result = storageClient.upload_file1(fileName, extName, metas);
		return result;
	}
	
	public String uploadFile(String fileName) throws Exception {
		return uploadFile(fileName, null, null);
	}
	
	public String uploadFile(String fileName, String extName) throws Exception {
		return uploadFile(fileName, extName, null);
	}
	
	/**
	 * 上传文件方法
	 * 
Title: uploadFile
	 * 
Description: 
	 * @param fileContent 文件的内容，字节数组
	 * @param extName 文件扩展名
	 * @param metas 文件扩展信息
	 * @return
	 * @throws Exception
	 */
	public String uploadFile(byte[] fileContent, String extName, NameValuePair[] metas) throws Exception {
		
		String result = storageClient.upload_file1(fileContent, extName, metas);
		return result;
	}
	
	public String uploadFile(byte[] fileContent) throws Exception {
		return uploadFile(fileContent, null, null);
	}
	
	public String uploadFile(byte[] fileContent, String extName) throws Exception {
		return uploadFile(fileContent, extName, null);
	}
}

3.5 文件上传代码实现: UploadController.java

package com.oranges.shop.controller;

import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;

import entity.Result;
import util.FastDFSClient;

@RestController
@RequestMapping("/upload")
public class UploadController {
	
	@Value("${FILE_SERVER_URL}")
	private String file_server_url;
	
	@RequestMapping("/uploadFile")
	public Result uploadFile(MultipartFile file){
		
		try {
			// 获得文件名:
			String fileName = file.getOriginalFilename();
			// 获得文件的扩展名:
			String extName = fileName.substring( fileName.lastIndexOf(".")+1 );
			// 创建工具类
			util.FastDFSClient client = new FastDFSClient("classpath:fastDFS/fdfs_client.conf");
			// 返回图片服务器的
			String path = client.uploadFile(file.getBytes(), extName); // group1/M00/
			// 图片服务器中文件的路径
			String url = file_server_url + path;
			
			return new Result(true, url);
		} catch (Exception e) {
			e.printStackTrace();
			return new Result(false, "上传失败！");
		}		
	}
}

3.6 前端代码

app.service("uploadService",function($http){
	
	this.uploadFile = function(){
		// 向后台传递数据: html5的特性
		var formData = new FormData();
		// 向formData中添加数据:
        // "file"与后台保持一致
        // file.files[0]: file前台上传的input的id
		formData.append("file",file.files[0]);
		
		return $http({
			method:'post',
			url:'../upload/uploadFile.do',
			data:formData,
            // 取消angularJS默认的提交json的方式
			headers:{'Content-Type':undefined} ,// Content-Type : text/html  text/plain
			// 将二进制文件序列化
            transformRequest: angular.identity
		});
	}
});