java153-字符输出流

    import javax.imageio.IIOException;
    import java.io.*;
    import java.util.Date;
     
    //字符输入流
    public class FileManagerChar {
        public static void readCharFile(File file){
            FileReader fileReader=null;//文本输入流
            if(file.exists()){
                try {
                    fileReader = new FileReader( file );//基于目标存在的文本文档输出流
                    char[] chs=new char[50];//字符零时缓冲区
                    int count=0;//存储实际读取的字符数量
                    while((count=fileReader.read(chs,0,chs.length))!=-1){
                        String s=new String( chs,0,count );
                        System.out.println( s );
                    }
                }catch (IOException e){
                    e.printStackTrace();
                }finally {
                    try {
                        fileReader.close();
                    }catch(IOException e){
                        e.printStackTrace();
                    }
                }
            }
        }
        //使用文本缓冲流读取文件
        public static void useBufferReader(File file){
            FileReader read=null;//基于文件的普通输入流
            BufferedReader br=null;//基于某个reader建立的字符缓冲流
            if(file.exists()){
                try {
                    read=new FileReader( file );//基于文件建立普通文本输入流
                    br=new BufferedReader( read );//基于某个read建立文本缓冲流
                    char[] chs=new char[25];
                    int count=0;
                    while ((count=br.read(chs,0,chs.length))!=-1){
                        String s=new String( chs,0,count );
                        System.out.println( s );
                    }
                }catch (IOException e){
                    e.printStackTrace();
                }finally {
                    try {
                        br.close();
                        read.close();
                        System.out.println( "关闭成功" );
                    }catch (IOException e){
                        e.printStackTrace();
                    }
                }
     
            }
        }
        //字节输出流
        public static void binaryOutStream(String filePath){
            String str="start=E:\\BaiduNetdiskDownload\\baidu6\\1.mp4";
            byte[] bys=str.getBytes();//将字符串转换为字节数组
            OutputStream out=null;
            try {
                 out = new FileOutputStream( filePath);
                 out.write(bys);
            }catch (IOException e){
                e.printStackTrace();
            }finally {
                try {
                    out.close();
                    System.out.println( "资源关闭" );
                }catch (IOException e){
                    e.printStackTrace();
                }
            }
        }
        //使用字节缓冲输出流
        public static void useBufferedOutput(File file){
            OutputStream out=null;
            BufferedOutputStream bs=null;
            String str="日照香炉生紫烟,\n遥看瀑布挂前川。\n飞流直下三千尺,\n以适应河洛就停";
            byte[] bys=str.getBytes();
        if(file.exists()){
                try {
                    System.out.println( file.getAbsolutePath() );
                    out = new FileOutputStream( file.getAbsoluteFile()+"/李白诗.doc" );
                    bs=new BufferedOutputStream( out );//基于某个outputstream建立缓冲输出流
                    bs.write( bys ,0,bys.length);//写入目标文件
                }catch (IOException e){
                    e.printStackTrace();
                }finally {
                    try {
                        bs.close();
                        out.close();
                    }catch (IOException e) {
                        e.printStackTrace();
                    }
                }
            }
        }
        //字符输出流bufferwrite
        //file文件存储的目录
        //filename 文件名称
        //content 文件内容
        public static void useBufferedWriter(File fir,String fileName,String content){
            File file=null;
            Writer writer=null;
            BufferedWriter bw=null;
            if(fir.exists()){
                file=new File(fir,fileName );
                char chs[]=content.toCharArray();
                try {
                    writer=new FileWriter( file );
                    bw=new BufferedWriter( writer );//基于Writer实例创建字符缓冲流
                    bw.write(chs);//将char型数组所有内容写入到目标文件中
                }catch (IOException e){
                    e.printStackTrace();
                }finally {
                    try {
                        bw.close();
                        writer.close();
                    }catch (Exception e){
                        e.printStackTrace();
                    }
                }
     
            }else{
                //创建目录后写入内容
                System.out.println( "目标文件目录没找到" );
            }
        }
        public static void copyFile(File target,File dir){
            InputStream in=null;
            OutputStream out=null;
            File copyFile=null;//目标写的文件对象
            if(target.exists()){//判断目标文件是否存在
                if(!dir.exists()){
                    dir.mkdirs();//如果目标文件不存在，创建目录
                }
                try {
                    in = new FileInputStream( target );//基于文件建立输入流
                    String fileName=target.getName();//获取文件源名称
                    //避免文件重名
                    copyFile=new File(dir+"/"+new Date().getTime()+fileName);//基于目标写入文件对象
                    out=new FileOutputStream( copyFile );//基于目标文件建立输出流
                    byte[] bys=new byte[1024];//临时存储字节数据的缓冲区
                    int count=0;//记录读取内容的临时变量
                    while ((count=in.read(bys,0,bys.length))!=-1){
                        System.out.println( "文件赋值读写中，请稍后----" );
                        out.write( bys,0,count );//将临时缓冲区内容写入到目标文件中
                    }
                    System.out.println( "目标赋值完成" );
                }catch (IOException e){
                    e.printStackTrace();
                }finally {
                    try {
                        out.close();
                        in.close();
                    }catch (IOException e){
                        e.printStackTrace();
                    }
                }
            }
        }
        //emp序列化对象
        //target//序列化对象的目标文件
        //java序列化,将员工对象保存到文件中
        public static void javaSer(Employeee emp,File target){
            OutputStream out=null;
            ObjectOutputStream oos=null;//序列化输出流
            if(emp!=null){
                try {
                    out = new FileOutputStream( target );
                    oos = new ObjectOutputStream( out );
                    oos.writeObject( emp );//将序列化对象保存到文件中
                }catch (IOException e){
                    e.printStackTrace();
                }finally {
                    try {
                        oos.close();
                        out.close();
                    }catch (Exception e){
                        e.printStackTrace();
                    }
                }
            }
        }
        //反序列化
        public static Employeee deser(File target) {
            InputStream in = null;
            ObjectInputStream ois = null;
            Employeee emp = null;
            if (target.exists()) {
                try {
                    in = new FileInputStream( target );
                    ois = new ObjectInputStream( in );
                    //进行反序列化
                    Object obj = ois.readObject();
                    emp = obj != null ? (Employeee) obj : null;//如果不为空进行类型转换
                } catch (IOException e) {
                    e.printStackTrace();
                } catch (ClassNotFoundException e) {
                    e.printStackTrace();
                }finally {
                    try {
                        ois.close();
                        in.close();
                    }catch (IOException e){
                        e.printStackTrace();
                    }
                }
            }
            return emp;//返回对象
        }
    }

测试类

    import java.io.File;
     
    public class test98 {
        public static void main(String[] args){
            String content="哈哈哈哈哈，一种俺是个大国哈撒给";
            File fir=new File( "e:/files/" );
            String fileName="简介.txt";
            FileManagerChar.useBufferedWriter(fir,fileName,content );
        }
    }

运行结果