文件上传

1.前端代码:
1.1表单上传一定要吧表单类型设置为:multipart/form-data, 并且提交方式设置为post

<form action="${pageContext.request.contextPath}/user/upload" method="post"
enctype="multipart/form-data">

1.2angularjs上传设置header属性headers:{'Content-Type':undefined},transforRequest属性transformRequest: angular.identity

app.service("uploadService",function($http){
	
	this.uploadFile = function(){
		// 向后台传递数据:
		var formData = new FormData();
		// 向formData中添加数据:
		formData.append("file",file.files[0]);
		
		return $http({
			method:'post',
			url:'../upload/uploadImg',
			data:formData,
			headers:{'Content-Type':undefined} ,// Content-Type : text/html  text/plain
			transformRequest: angular.identity
		});
	}
	
});

2.后端controller:
使用Multipartfile对象接收

@RequestMapping("/upload")
@RestController
public class UploadFileController {

    @Value("${FILE_SERVER_URL}")
    private String FILE_SERVER_URL;

    @RequestMapping("/uploadImg")
    public StatusResult uploadImg(MultipartFile file) {
        String conf = "classpath:fastDFS/fdfs_client.conf";
        StatusResult statusResult = new StatusResult();
        try {
            FastDFSClient fastDFSClient = new FastDFSClient(conf);
            // 上传至分布式系统,返回路径
            String filePath = fastDFSClient.uploadFile(file.getBytes(), file.getOriginalFilename());
            statusResult.setStatus(true);
            statusResult.setMessage(FILE_SERVER_URL + filePath);
        } catch (Exception e) {
            e.printStackTrace();
            System.out.println("文件上传失败");
            statusResult.setStatus(false);
            statusResult.setMessage("上传失败");
        }

        return statusResult;
    }
}

3.springmvc.xml配置多媒体解析器

	<!-- 配置多媒体解析器 -->
	<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
		<property name="defaultEncoding" value="UTF-8"></property>
		<!-- 设定文件上传的最大值5MB，5*1024*1024 -->
		<property name="maxUploadSize" value="5242880"></property>
	</bean>

4.fastDFS工具类

package com.itcast.core.utils;

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
	 * <p>Title: uploadFile</p>
	 * <p>Description: </p>
	 * @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
	 * <p>Title: uploadFile</p>
	 * <p>Description: </p>
	 * @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);
	}
}

5.fastDFS配置文件

# 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=192.168.200.128:22122

#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