import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.ArrayList;public class Demo1 {public static void main(String[] args) throws IOException {fangfa1();}private static void fangfa1() throws IOException {// TODO Auto-generated method stubFile file1 = new File("F:\\a.txt");File file2 = new File("F:\\b.txt");File file3 = new File("F:\\c.txt");FileInputStream filein1 = new FileInputStream(file1);FileInputStream filein2 = new FileInputStream(file2);FileOutputStream fileout3 = new FileOutputStream(file3);ArrayList<FileInputStream> list = new ArrayList<FileInputStream>();list.add(filein1);list.add(filein2);byte[] buf = new byte[1024];int content;for(int i = 0;i < list.size();i++) {FileInputStream filein = list.get(i);while((content = filein.read(buf))!=1) {fileout3.write(buf, 0, content);}filein.close();}fileout3.close();}
}

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.SequenceInputStream;
import java.util.ArrayList;public class Demo2 {public static void main(String[] args) throws IOException {fangfa1();}private static void fangfa1() throws IOException {// TODO Auto-generated method stubFile file1 = new File("F:\\a.txt");File file2 = new File("F:\\b.txt");File file3 = new File("F:\\c.txt");FileInputStream filein1 = new FileInputStream(file1);FileInputStream filein2 = new FileInputStream(file2);FileOutputStream fileout3 = new FileOutputStream(file3);SequenceInputStream sinput = new SequenceInputStream(filein1, filein2);byte[] buf = new byte[1024];int content;while((content = sinput.read(buf))!=1) {fileout3.write(buf, 0, content);}sinput.close();fileout3.close();}
}

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.SequenceInputStream;
import java.util.Enumeration;
import java.util.Vector;public class Demo3 {public static void main(String[] args) throws IOException {fangfa1();}private static void fangfa1() throws IOException {// TODO Auto-generated method stubFile file1 = new File("F:\\a.txt");File file2 = new File("F:\\b.txt");File file3 = new File("F:\\c.txt");File file4 = new File("F:\\d.txt");FileInputStream filein1 = new FileInputStream(file1);FileInputStream filein2 = new FileInputStream(file2);FileInputStream filein3 = new FileInputStream(file3);FileOutputStream fileout4 = new FileOutputStream(file4);Vector<FileInputStream> vector = new Vector<FileInputStream>();vector.add(filein1);vector.add(filein2);vector.add(filein3);Enumeration<FileInputStream> it = vector.elements();SequenceInputStream sinput = new SequenceInputStream(it);byte[] buf = new byte[1024];int content;while((content = sinput.read(buf))!=1) {fileout4.write(buf, 0, content);}sinput.close();fileout4.close();}
}

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.SequenceInputStream;
import java.util.Enumeration;
import java.util.Vector;public class Demo4 {public static void main(String[] args) throws IOException {//jianqie();//剪切hebing();//合并
    }public static void hebing() throws IOException{File dir = new File("F:\\music");Vector<FileInputStream> vector = new Vector<FileInputStream>();File[] files = dir.listFiles();for(File file : files){if(file.getName().endsWith(".mp3")){vector.add(new FileInputStream(file));}}Enumeration<FileInputStream> e = vector.elements();SequenceInputStream inputStream = new SequenceInputStream(e);FileOutputStream fileOutputStream = new FileOutputStream("F:\\合并.mp3");byte[] buf = new byte[1024];int length = 0 ; while((length =  inputStream.read(buf))!=-1){fileOutputStream.write(buf,0,length);}fileOutputStream.close();inputStream.close();}public static void jianqie() throws IOException{File file = new File("F:\\1.mp3");File dir = new File("F:\\music");FileInputStream fileInputStream = new FileInputStream(file);byte[] buf = new byte[1024*1024];int length = 0;for(int i = 0 ;  (length = fileInputStream.read(buf))!=-1 ; i++){FileOutputStream fileOutputStream =    new FileOutputStream(new File(dir,"part"+i+".mp3"));fileOutputStream.write(buf,0,length);fileOutputStream.close();}fileInputStream.close();}
}

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.ObjectInput;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.Serializable;class Address implements Serializable{String country; String city;public Address(String country,String city){this.country = country;this.city = city;}
}class User implements Serializable{String userName ;String password;transient int age;// transient 透明
    Address address ;public User(String userName , String passwrod) {this.userName = userName;this.password = passwrod;}public User(String userName , String passwrod,int age,Address address) {this.userName = userName;this.password = passwrod;this.age = age;this.address = address;}@Overridepublic String toString() {return "用户名："+this.userName+ " 密码："+ this.password+" 年龄："+this.age+" 地址："+this.address.city;}
}public class Demo5 {public static void main(String[] args) throws IOException, Exception {writeObj();//readObj();
    }//把文件中的对象信息读取出来public static void readObj() throws  IOException, ClassNotFoundException{//找到目标文件File file = new File("F:\\obj.txt");//建立数据的输入通道FileInputStream fileInputStream = new FileInputStream(file);//建立对象的输入流对象ObjectInputStream objectInputStream = new ObjectInputStream(fileInputStream);//读取对象信息User user = (User) objectInputStream.readObject(); System.out.println(user);}//定义方法把对象的信息写到硬盘上public static void writeObj() throws IOException{//把user对象的信息持久化存储。Address address = new Address("中国","广州");User user = new User("admin","123",15,address);//找到目标文件File file = new File("F:\\obj.txt");//建立数据输出流对象FileOutputStream fileOutputStream = new FileOutputStream(file);//建立对象的输出流对象ObjectOutputStream objectOutputStream = new ObjectOutputStream(fileOutputStream);//把对象写出
        objectOutputStream.writeObject(user);//关闭资源
        objectOutputStream.close();}
}