1. 依赖

<dependency>
    <groupId>org.apache.camel.springboot</groupId>
    <artifactId>camel-spring-boot-starter</artifactId>
    <version>3.4.2</version>
</dependency>
<dependency>
    <groupId>org.apache.camel</groupId>
    <artifactId>camel-ftp</artifactId>
    <version>3.4.2</version>
</dependency>
版本保持一致，可用最新版。

2. 配置文件

camel:
  springboot:
    main-run-controller: true
    
management:
  endpoint:
    camelroutes:
      enabled: true
      read-only: true

# delay=5s 间隔多少 ms 轮询一次
# readLock 读锁
# noop 如果 noop = true，Camel 也将设置 idempotent = true 以避免一遍又一遍地使用相同的文件
# recursive 是否遍历文件夹处理文件
ftp:
  server:
    info: ftp://ftpuser@172.16.113.128:21?password=123456&delay=5s&readLock=rename&ftpClient.controlEncoding=UTF-8&noop=true&recursive=true
  local:
    dir: file:D:/temp/ftp/

2.1 配置文档

3. 编写一个Component

继承RouteBuilder,实现configure方法。
设置数据源、目标，并且可以根据需要额外设置 过滤器Predicate和处理器Processor。

package com.example.goodsync.ftpdemo;
 
import org.apache.camel.LoggingLevel;
import org.apache.camel.builder.RouteBuilder;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Component;
 
/**
 * @className: DownloadRouteDemo
 * @description: DownloadRouteDemo
 */
@Component
public class DownloadRouteDemo extends RouteBuilder {
 
    private static Logger logger = LoggerFactory.getLogger(DownloadRouteDemo.class);
 
    @Value("${ftp.server.info}")
    private String ftpServer;
    @Value("${ftp.local.dir}")
    private String downloadLocation;
 
    @Autowired
    LocationFileProcessor locationFileProcessor;
    @Autowired
    FtpDownloadFileFilter ftpDownloadFileFilter;
 
    @Override
    public void configure() throws Exception {
        from(ftpServer)    //数据源
                .filter(ftpDownloadFileFilter) //过滤器
                .to(downloadLocation) //目标
                .log(LoggingLevel.INFO, logger, "Downloaded file ${file:name} complete.")
                .process(locationFileProcessor); //处理器
    }
}

4. 过滤器设置

过滤器设置，只处理.txt或者.json文件。上述代码中 filter 必须再to 前面才能生效。

package com.example.goodsync.ftpdemo;
 
import org.apache.camel.Exchange;
import org.apache.camel.Predicate;
import org.apache.camel.component.file.GenericFileMessage;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Component;
 
import java.io.RandomAccessFile;
 
 
/**
 * @className: FtpDownloadFileFilter
 * @description: FtpDownloadFileFilter
 */
 
@Component
public class FtpDownloadFileFilter implements Predicate {
    private static Logger logger = LoggerFactory.getLogger( FtpDownloadFileFilter.class );
 
    @Override
    public boolean matches(Exchange exchange) {
        boolean bMatches = true;
        GenericFileMessage<RandomAccessFile> inFileMessage = (GenericFileMessage<RandomAccessFile>) exchange.getIn();
        String fileName = inFileMessage.getGenericFile().getFileName();
        bMatches = fileName.endsWith(".txt") || fileName.endsWith(".json");
 
        logger.info("fileName:"+fileName+"matches:"+bMatches);
 
        return bMatches;
    }
}

5. 处理器

代码如下:

package com.example.goodsync.ftpdemo;
 
import org.apache.camel.Exchange;
import org.apache.camel.Processor;
import org.apache.camel.component.file.GenericFileMessage;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Component;
 
import java.io.RandomAccessFile;

/**
 * @className: LocationFileProcessor
 * @description: LocationFileProcessor
 */
@Component
public class LocationFileProcessor implements Processor {
 
    private static Logger logger = LoggerFactory.getLogger( LocationFileProcessor.class );
 
 
    @Value("${ftp.local.dir}")
    private String fileDir;
 
    @Autowired
    OrderService orderService;
 
    @Override
    public void process(Exchange exchange) throws Exception {
        GenericFileMessage<RandomAccessFile> inFileMessage = (GenericFileMessage<RandomAccessFile>) exchange.getIn();

        //文件名
        String fileName = inFileMessage.getGenericFile().getFileName();
        //文件的绝对路径
        logger.info(fileDir + fileName);
        //解析入库等操作
        orderService.process(fileDir + fileName);
 
    }
 
}

6. 定义一个OrderService

package com.example.goodsync.ftpdemo;
 
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Service;
 
/**
 * @className: OrderService
 * @description: OrderService
 */
@Service
public class OrderService {
    private static Logger logger = LoggerFactory.getLogger( OrderService.class );
    public void process(String path){
        logger.info("path:"+path);
    }
}

7. 问题

7.1 更多的文档信息移步官方文档

https://camel.apache.org/components/3.14.x/ftp-component.html#_endpoint_query_option_transferLoggingVerbose

7.2 出现“550 create directory operation failed”错误

原因是SELinux(Security-Enhanced Linux----是美国国家安全局对于强制访问控制的实现, 是Linux 上最杰出的新安全子系统.)安装机制搞的鬼.只要disable SELinux就可以了.
解决办法: 关闭SELinux

# vim /etc/selinux/config

将 SELINUX=XXX -->XXX 代表级别 改为 SELINUX=disabled
重启系统

7.3 文件名出现乱码

地址后面拼接 ftpClient.controlEncoding：配置 ftpClient 编码格式。 比如ftpClient.controlEncoding=UTF-8

标签：FTP,SpringBoot,camel,Camel,import,apache,org,logger,true
来源： https://www.cnblogs.com/equals/p/15827297.html