java连接sftp服务器读取压缩包的文件（例：读取zip中的csv文件返回数组）

1.pom.xml引入jar包

<dependency>
     <groupId>com.jcraft</groupId>
      <artifactId>jsch</artifactId>
      <version>0.1.55</version>
</dependency>
<!--csv-->
<dependency>
    <groupId>com.opencsv</groupId>
    <artifactId>opencsv</artifactId>
    <version>4.4</version>
</dependency>

2.连接sftp服务器方法

    private static Session sshSession;

    /**
     * 连接sftp服务器
     * @param host  ftp地址
     * @param port  端口
     * @param userName 账号
     * @param password 密码
     * @return
     */
    public static ChannelSftp sftpConnection(String host,int port, String userName, String password){
        JSch jsch = new JSch();
        ChannelSftp channelSftp;
        try {
            jsch.getSession(userName, host, port);
            sshSession = jsch.getSession(userName, host, port);
            sshSession.setPassword(password);
            Properties properties = new Properties();
            properties.put("StrictHostKeyChecking", "no");
            sshSession.setConfig(properties);
            sshSession.connect();
            Channel channel = sshSession.openChannel("sftp");
            channel.connect();
            channelSftp = (ChannelSftp) channel;
        }catch (JSchException e){
            e.printStackTrace();
            throw new RRException("Sftp服务器登录异常!");
        }
        return channelSftp;
    }

3.断开sftp服务方法

     /**
     *@description 退出Sftp服务器登录
     *@return
     **/
    public static void sftpClose(ChannelSftp channelSftp){
        if (channelSftp != null) {
            if (channelSftp.isConnected()){
                channelSftp.disconnect();
            }
        }
    }

    /**
     * 关闭session
     */
    public static void sessionClose(){
        if (sshSession != null) {
            if (sshSession.isConnected()){
                sshSession.disconnect();
                sshSession = null;
            }
        }
    }

4.将一个IO流解析，转化数组形式的集合代码（csv格式）

  /**
     * sftp服务器
     * <b>将一个IO流解析，转化数组形式的集合<b>
     * csv文件解析
     * @param in
     *            文件inputStream流
     */
    public static List<String[]> sftpCsv(InputStream in) {
        List<String[]> csvList = new ArrayList<String[]>();
        if (null != in) {
            try {
                InputStreamReader is = new InputStreamReader(in, "UTF-8");
                CSVParser csvParser = new CSVParserBuilder().build();
                CSVReader reader = new CSVReaderBuilder(is).withCSVParser(csvParser).build();
                csvList = reader.readAll();
            }catch (UnsupportedEncodingException e){
                e.printStackTrace();
            }catch (IOException e) {
                e.printStackTrace();
            }
        }
        return csvList;
    }

5.读取压缩包zip中的文件

public static void main(String[] args) {
        ChannelSftp sftp = sftpConnection("118.*.*.*",22,"admin","password");
        String path = "/path/";
        String filename = "20200623.zip";
        try {
            if (path != null && !"".equals(path)) {
                sftp.cd(path);//进入所在路径
            }
            InputStream in = sftp.get(filename);
            ZipInputStream zin = new ZipInputStream(in);
            while((zin.getNextEntry())!=null){
                List<String[]> strings = sftpCsv(zin);
                for (String [] s:strings){
                    for (String ss :s){
                        System.out.print(ss+",");
                    }
                    System.out.println();
                }
                //也可以直接读取出来自己处理
                /*BufferedReader bufferedReader = new BufferedReader(
                        new InputStreamReader(zin));
                String line;
                while((line = bufferedReader.readLine())!= null){
                    System.out.println(line);
                }*/
            }
            in.close();
            sftpClose(sftp);
            sessionClose();

        }catch (Exception e){
           e.printStackTrace();
        }


    }