一、引入FTP包和连接池包
<!-- ftp连接start -->
<dependency>
<groupId>commons-net</groupId>
<artifactId>commons-net</artifactId>
<version>3.5</version>
</dependency>
<!-- ftp连接start -->
<!-- 自定义连接池 start-->
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-pool2</artifactId>
<version>2.5.0</version>
</dependency>
<!-- 自定义连接池 end-->
二、在项目根路径新建一个配置文件，把连接池配置属性和FTPClient属性配置在配置文件中，ftpClient.properties配置文件如下
#FTP连接池配置
#最大数
ftpClient_maxTotal=50
#最小空闲
ftpClient_minIdle=10
#最大空闲
ftpClient_maxIdle=100
#最大等待时间
ftpClient_maxWait=3000
#池对象耗尽之后是否阻塞,maxWait<0时一直等待
ftpClient_blockWhenExhausted=true
#取对象是验证
ftpClient_testOnBorrow=true
#回收验证
ftpClient_testOnReturn=true
#创建时验证
ftpClient_testOnCreate=true
#空闲验证
ftpClient_testWhileIdle=false
#后进先出
ftpClient_lifo=false
#FTP连接属性配置
#ip
ftpClient_host=192.168.158.98
#端口
ftpClient_port=21
#登录名
ftpClient_username=ftpadmin
#密码
ftpClient_pasword=eakom123456
#连接是否为主动模式
ftpClient_passiveMode=true
#编码
ftpClient_encoding=UTF-8
#超时时间
ftpClient_clientTimeout=600
#线程数
ftpClient_threaNum=1
#文件传送类型
#0=ASCII_FILE_TYPE（ASCII格式） 1=EBCDIC_FILE_TYPE 2=LOCAL_FILE_TYPE（二进制文件）
ftpClient_transferFileType=2
#是否重命名
ftpClient_renameUploaded=true
#重新连接时间
ftpClient_retryTimes=1200
#缓存大小
ftpClient_bufferSize=1024
#默认进入的路径
ftpClient_workingDirectory=/home/ftpadmin/
三、新建一个FTP客户端属性类
package com.eakom.common.util.ftpPool;
/**
* FTP属性相关的配置
* @author eakom
* @date 2018年1月11日
*/
public class FTPConfig{
private String host;
private int port;
private String username;
private String password;
private boolean passiveMode;
private String encoding;
private int clientTimeout;
private int threadNum;
private int transferFileType;
private boolean renameUploaded;
private int retryTimes;
private int bufferSize;
private String workingDirectory;
public String getWorkingDirectory() {
return workingDirectory;
}
public void setWorkingDirectory(String workingDirectory) {
this.workingDirectory = workingDirectory;
}
public int getBufferSize() {
return bufferSize;
}
public void setBufferSize(int bufferSize) {
this.bufferSize = bufferSize;
}
public String getHost() {
return host;
}
public void setHost(String host) {
this.host = host;
}
public int getPort() {
return port;
}
public void setPort(int port) {
this.port = port;
}
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public boolean getPassiveMode() {
return passiveMode;
}
public void setPassiveMode(boolean passiveMode) {
this.passiveMode = passiveMode;
}
public String getEncoding() {
return encoding;
}
public void setEncoding(String encoding) {
this.encoding = encoding;
}
public int getClientTimeout() {
return clientTimeout;
}
public void setClientTimeout(int clientTimeout) {
this.clientTimeout = clientTimeout;
}
public int getThreadNum() {
return threadNum;
}
public void setThreadNum(int threadNum) {
this.threadNum = threadNum;
}
public int getTransferFileType() {
return transferFileType;
}
public void setTransferFileType(int transferFileType) {
this.transferFileType = transferFileType;
}
public boolean isRenameUploaded() {
return renameUploaded;
}
public void setRenameUploaded(boolean renameUploaded) {
this.renameUploaded = renameUploaded;
}
public int getRetryTimes() {
return retryTimes;
}
public void setRetryTimes(int retryTimes) {
this.retryTimes = retryTimes;
}
}
类中的属性与配置文件ftpClient.properties中的属性相对应
四、新建一个FTP客户端工厂类，继承于commons-pool 包中的BasePooledObjectFactory类，并重写create()、 wrap(FTPClient ftpClient)、destroyObject(PooledObject p)和validateObject(PooledObject p)四个方法
package com.eakom.common.util.ftpPool;
import java.io.IOException;
import org.apache.commons.net.ftp.FTPClient;
import org.apache.commons.net.ftp.FTPReply;
import org.apache.commons.pool2.BasePooledObjectFactory;
import org.apache.commons.pool2.PooledObject;
import org.apache.commons.pool2.impl.DefaultPooledObject;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class FTPClientFactory extends BasePooledObjectFactory<FTPClient> {
private static Logger logger = LoggerFactory.getLogger(FTPClientFactory.class);
private FTPConfig ftpConfig;
public FTPClientFactory(FTPConfig ftpConfig) {
this.ftpConfig = ftpConfig;
}
/**
* 新建对象
*/
@Override
public FTPClient create() throws Exception {
FTPClient ftpClient = new FTPClient();
ftpClient.setConnectTimeout(ftpConfig.getClientTimeout());
try {
ftpClient.connect(ftpConfig.getHost(), ftpConfig.getPort());
int reply = ftpClient.getReplyCode();
if (!FTPReply.isPositiveCompletion(reply)) {
ftpClient.disconnect();
logger.error("FTPServer 拒绝连接");
return null;
}
boolean result = ftpClient.login(ftpConfig.getUsername(),ftpConfig.getPassword());
if (!result) {
logger.error("ftpClient登陆失败!");
throw new Exception("ftpClient登陆失败! userName:"+ ftpConfig.getUsername() + " ; password:"
+ ftpConfig.getPassword());
}
ftpClient.setFileType(ftpConfig.getTransferFileType());
ftpClient.setBufferSize(ftpConfig.getBufferSize());
ftpClient.setControlEncoding(ftpConfig.getEncoding());
if (ftpConfig.getPassiveMode()) {
ftpClient.enterLocalPassiveMode();
}
ftpClient.changeWorkingDirectory(ftpConfig.getWorkingDirectory());
} catch (IOException e) {
logger.error("FTP连接失败：", e);
}
return ftpClient;
}
@Override
public PooledObject<FTPClient> wrap(FTPClient ftpClient) {
return new DefaultPooledObject<FTPClient>(ftpClient);
}
/**
* 销毁对象
*/
@Override
public void destroyObject(PooledObject<FTPClient> p) throws Exception {
FTPClient ftpClient = p.getObject();
ftpClient.logout();
super.destroyObject(p);
}
/**
* 验证对象
*/
@Override
public boolean validateObject(PooledObject<FTPClient> p) {
FTPClient ftpClient = p.getObject();
boolean connect = false;
try {
connect = ftpClient.sendNoOp();
if(connect){
ftpClient.changeWorkingDirectory(ftpConfig.getWorkingDirectory());
}
} catch (IOException e) {
e.printStackTrace();
}
return connect;
}
}
五、新建FTP连接池类，连接池中有带有一个构造方法，连接器初始化时，自动新建commons-pool包中的GenericObjectPool类，初始化连接池；
package com.eakom.common.util.ftpPool;
import java.io.InputStream;
import java.util.Properties;
import org.apache.commons.net.ftp.FTPClient;
import org.apache.commons.pool2.impl.GenericObjectPool;
import org.apache.commons.pool2.impl.GenericObjectPoolConfig;
public class FTPClientPool{
private GenericObjectPool<FTPClient> ftpClientPool;
public FTPClientPool(InputStream in){
Properties pro = new Properties();
try {
pro.load(in);
} catch (Exception e) {
e.printStackTrace();
System.exit(-1);
}
// 初始化对象池配置
GenericObjectPoolConfig poolConfig = new GenericObjectPoolConfig();
poolConfig.setBlockWhenExhausted(Boolean.parseBoolean(pro.getProperty("ftpClient_blockWhenExhausted")));
poolConfig.setMaxWaitMillis(Long.parseLong(pro.getProperty("ftpClient_maxWait")));
poolConfig.setMinIdle(Integer.parseInt(pro.getProperty("ftpClient_minIdle")));
poolConfig.setMaxIdle(Integer.parseInt(pro.getProperty("ftpClient_maxIdle")));
poolConfig.setMaxTotal(Integer.parseInt(pro.getProperty("ftpClient_maxTotal")));
poolConfig.setTestOnBorrow(Boolean.parseBoolean(pro.getProperty("ftpClient_testOnBorrow")));
poolConfig.setTestOnReturn(Boolean.parseBoolean(pro.getProperty("ftpClient_testOnReturn")));
poolConfig.setTestOnCreate(Boolean.parseBoolean(pro.getProperty("ftpClient_testOnCreate")));
poolConfig.setTestWhileIdle(Boolean.parseBoolean(pro.getProperty("ftpClient_testWhileIdle")));
poolConfig.setLifo(Boolean.parseBoolean(pro.getProperty("ftpClient_lifo")));
FTPConfig ftpConfig=new FTPConfig();
ftpConfig.setHost(pro.getProperty("ftpClient_host"));
ftpConfig.setPort(Integer.parseInt(pro.getProperty("ftpClient_port")));
ftpConfig.setUsername(pro.getProperty("ftpClient_username"));
ftpConfig.setPassword(pro.getProperty("ftpClient_pasword"));
ftpConfig.setClientTimeout(Integer.parseInt(pro.getProperty("ftpClient_clientTimeout")));
ftpConfig.setEncoding(pro.getProperty("ftpClient_encoding"));
ftpConfig.setWorkingDirectory(pro.getProperty("ftpClient_workingDirectory"));
ftpConfig.setPassiveMode(Boolean.parseBoolean(pro.getProperty("ftpClient_passiveMode")));
ftpConfig.setRenameUploaded(Boolean.parseBoolean(pro.getProperty("ftpClient_renameUploaded")));
ftpConfig.setRetryTimes(Integer.parseInt(pro.getProperty("ftpClient_retryTimes")));
ftpConfig.setTransferFileType(Integer.parseInt(pro.getProperty("ftpClient_transferFileType")));
ftpConfig.setBufferSize(Integer.parseInt(pro.getProperty("ftpClient_bufferSize")));
// 初始化对象池
ftpClientPool = new GenericObjectPool<FTPClient>(new FTPClientFactory(ftpConfig), poolConfig);
}
public FTPClient borrowObject() throws Exception {
/* System.out.println("获取前");
System.out.println("活动"+ftpClientPool.getNumActive());
System.out.println("等待"+ftpClientPool.getNumWaiters());
System.out.println("----------");*/
return ftpClientPool.borrowObject();
}
public void returnObject(FTPClient ftpClient) {
/*System.out.println("归还前");
System.out.println("活动"+ftpClientPool.getNumActive());
System.out.println("等待"+ftpClientPool.getNumWaiters());
System.out.println("----------");*/
ftpClientPool.returnObject(ftpClient);
System.out.println("归还后");
System.out.println("活动"+ftpClientPool.getNumActive());
System.out.println("等待"+ftpClientPool.getNumWaiters());
System.out.println("----------");
}
}
六、测试连接池
同时启动多个线程，观察连接池内，FTPClient的数量的变化
package com.eakom.common.util.ftpPool;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.Date;
import org.apache.commons.net.ftp.FTPClient;
public class Ftp {
private static FTPClientPool ftpClientPool;
static{
// ftpClientPool=new FTPClientPool(Thread.currentThread().getContextClassLoader().getResourceAsStream("ftpClient.properties"));
ftpClientPool=new FTPClientPool(Ftp.class.getClassLoader().getResourceAsStream("ftpClient.properties"));
}
public static void main(String[] args) {
for(int i=0;i<50;i++){
Thread thread=new Thread(new Runnable() {
@Override
public void run() {
sendFile();
}
});
thread.start();
try {
thread.sleep(15);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
public static void sendFile(){
long start = System.currentTimeMillis();
InputStream inputStream = null;
FTPClient ftpClient = null;
try {
ftpClient = ftpClientPool.borrowObject();
} catch (Exception e) {
e.printStackTrace();
}
try {
String path="C:/Users/Administrator/Desktop/44/中文.txt";
File file = new File(path);
ftpClient.changeWorkingDirectory("/home/ftpadmin/aa");
inputStream = new FileInputStream(file);
String fileName =new Date().getSeconds()+new Date().getSeconds()+".txt";
boolean flag = ftpClient.storeFile(new String(fileName.getBytes("GBK"), "iso-8859-1") , inputStream);
long end = System.currentTimeMillis();
System.out.println("**********************************************"+flag);
long lo=end-start;
System.out.println("耗时："+lo);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}finally{
ftpClientPool.returnObject(ftpClient);
}
}
}
至此，FTPClient连接创建完成，如果问题，欢迎大家指正，谢谢!
