5.2SpringMVC的文件上传

一.spring中的配置:

在dispatcher-servlet.xml中配置

<!-- 文件上传 -->
    <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
        <property name="maxUploadSize" value="10485760"/> <!-- 10m -->
        <property name="maxInMemorySize" value="4096" />
        <property name="defaultEncoding" value="UTF-8"></property>
    </bean>

二.FTPUtil

package cn.firstpro.util;

import com.sun.net.httpserver.Authenticator;
import org.apache.commons.net.ftp.FTPClient;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.util.List;

/**
 * @Author LiuHe
 * @Date 2017/11/14 13:18
 */
public class FTPUtil {

    private static final Logger logger = LoggerFactory.getLogger(FTPUtil.class);

    private static String ftpip = PropertiesUtil.getProperty("ftp.server.ip");
    private static String ftpUser = PropertiesUtil.getProperty("ftp.user");
    private static String ftpPass = PropertiesUtil.getProperty("ftp.pass");


    public FTPUtil(String ip, int port, String user, String pwd) {
        this.ip = ip;
        this.port = port;
        this.user = user;
        this.pwd = pwd;
    }
    public static boolean uploadFile(List<File> fileList) throws IOException {
        FTPUtil ftpUtil = new FTPUtil(ftpip,21,ftpUser,ftpPass);
        logger.info("开始连接ftp服务器");
        boolean result = ftpUtil.uploadFile("img",fileList);
        logger.info("结束上传,上传结果:{}");
        return result;
    }
    private boolean uploadFile(String remotePath,List<File> fileList) throws IOException {
        boolean uploaded = true;
        FileInputStream fis = null;
        //连接FTP服务器
        if (connectServer(this.getIp(),this.port,this.user,this.pwd)) {
            //更改工作目录
            try {
                ftpClient.changeWorkingDirectory(remotePath);
                //设置缓冲区
                ftpClient.setBufferSize(1024);
                //设置encoding
                ftpClient.setControlEncoding("UTP-8");
                //设置文件类型,这里设置成二进制的文件类型,防止乱码问题
                ftpClient.setFileType(FTPClient.BINARY_FILE_TYPE);
                //打开本地的被动模式
                ftpClient.enterLocalPassiveMode();
                for (File fileItem : fileList) {
                    fis = new FileInputStream(fileItem);
                    ftpClient.storeFile(fileItem.getName(),fis);
                }


            } catch (IOException e) {
                logger.error("上传文件异常",e);
                uploaded = false;
                e.printStackTrace();
            }finally {
                fis.close();
                ftpClient.disconnect();
            }
        }
        return uploaded;
    }
    //连接FTP服务器
    private boolean connectServer(String ip, int port, String user, String pwd) {
        boolean isSuccess = false;
        ftpClient = new FTPClient();
        try {
            ftpClient.connect(ip);
            isSuccess = ftpClient.login(user,pwd);
        } catch (IOException e) {
            logger.error("连接FTP服务器异常",e);
            e.printStackTrace();
        }
        return isSuccess;
    }

    private String ip;
    private int port;
    private String user;
    private String pwd;
    private FTPClient ftpClient;

    public String getIp() {
        return ip;
    }

    public void setIp(String ip) {
        this.ip = ip;
    }

    public int getPort() {
        return port;
    }

    public void setPort(int port) {
        this.port = port;
    }

    public String getPwd() {
        return pwd;
    }

    public void setPwd(String pwd) {
        this.pwd = pwd;
    }

    public FTPClient getFtpClient() {
        return ftpClient;
    }

    public void setFtpClient(FTPClient ftpClient) {
        this.ftpClient = ftpClient;
    }
}

三.上传实现

package cn.firstpro.service.impl;

import cn.firstpro.service.IFileService;
import cn.firstpro.util.FTPUtil;
import com.google.common.collect.Lists;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Service;
import org.springframework.web.multipart.MultipartFile;

import java.io.File;
import java.io.IOException;
import java.util.UUID;

/**
 * @Author LiuHe
 * @Date 2017/11/14 11:46
 */
@Service
public class FileServiceImpl implements IFileService {

    //生成日志
    Logger logger = LoggerFactory.getLogger(FileServiceImpl.class);

    public String upload(MultipartFile file, String path) {
        //拿到原始文件名
        String fileName = file.getOriginalFilename();
        //获取扩展名
        String fileExtensionName = fileName.substring(fileName.lastIndexOf(".")+1);
        //上传文件的名字
        String uploadFileName = UUID.randomUUID().toString() + "." + fileExtensionName;
        logger.info("开始上传文件,上传文件的文件名:{},上传的路径:{},新文件名:{}",fileName,path,uploadFileName);
        File fileDir = new File(path);
        if (!fileDir.exists()){
            //赋予可写权限
            fileDir.setWritable(true);
            //mkdir()是创建一级,而mkdirs()可以直接创建多级目录
            fileDir.mkdirs();
        }
        File targetFile = new File(path,uploadFileName);
        try {
            file.transferTo(targetFile);
            //文件已经上传成功
            // 将targetFile上传到我们的FTP服务器上
            FTPUtil.uploadFile(Lists.newArrayList(targetFile));
            //已经上传到ftp服务器
            // 上传完之后,删除upload下面的文件,这个文件夹可以留着
            targetFile.delete();
        } catch (IOException e) {
            logger.error("上传文件异常",e);
            return null;
        }
        return targetFile.getName();
    }
}