package book.io; 

import java.io.File; 
import java.io.FileOutputStream; 
import java.io.IOException; 
import java.io.OutputStream; 
import java.io.OutputStreamWriter; 
import java.io.PrintWriter; 
import java.io.Writer; 

/** *//** 
 * 多种方式写文件 
 * @author joe 
 * 
 */ 

public class WriteToFile ...{ 
    /** *//** 
     * 以字节为单位写文件。适合于写二进制文件，如图片等 
     * @param fileName    文件名 
     */ 
    public static void writeFileByBytes(String fileName) ...{ 
        File file = new File(fileName); 
        OutputStream out = null; 
        try ...{ 
            //打开文件输出流 
            out = new FileOutputStream(file); 
            String content = "文件内容： 1,The First line; 2,The second line."; 
            byte[] bytes = content.getBytes();    //读取输出流中的字节 
            out.write(bytes); 
            System.out.println("写文件" + file.getAbsolutePath() + "成功！"); 
        } catch (IOException e) ...{ 
            System.out.println("写文件" + file.getAbsolutePath() + "失败！"); 
            e.printStackTrace(); 
        } finally ...{ 
            if (out != null) ...{ 
                try ...{ 
                    out.close(); 
                } catch(IOException e1) ...{ 
                    e1.printStackTrace(); 
                } 
            } 
        } 
    } 
     
    /** *//** 
     * 以字符为单位写文件 
     * @param fileName    文件名 
     */ 
    public static void writeFileByChars(String fileName) ...{ 
        File file = new File(fileName); 
        Writer writer = null; 
        try ...{ 
            //打开文件输出流 
            writer = new OutputStreamWriter(new FileOutputStream(file)); 
            String counter = "文件内容  1,The First line; 2,The second line."; 
            writer.write(counter); 
            System.out.println("写文件 " + file.getAbsolutePath() + "成功！"); 
        } catch (IOException e) ...{ 
            System.out.println("写文件 " + file.getAbsolutePath() + "失败！"); 
            e.printStackTrace(); 
        } finally ...{ 
            if(writer != null) ...{ 
                try...{ 
                    writer.close(); 
                } catch (IOException e1) ...{ 
                    e1.printStackTrace(); 
                } 
            } 
        } 
    } 
     
    /** *//** 
     * 以行为单位写文件 
     * @param fileName    文件名 
     */ 
    public static void writeFileByLines(String fileName) ...{ 
        File file = new File(fileName); 
        PrintWriter writer = null; 
        try ...{ 
            writer = new PrintWriter(new FileOutputStream(file)); 
            writer.println("文件内容：");    //写字符串 
            //写入各种基本类型数据 
            writer.print(true); 
            writer.print(155); 
            writer.println();    //换行 
            writer.flush();    //写入文件 
            System.out.println("写文件 " + file.getAbsolutePath() + "成功！"); 
        } catch (IOException e) ...{ 
            System.out.println("写文件 " + file.getAbsolutePath() + "失败！"); 
            e.printStackTrace(); 
        } finally ...{ 
            if (writer != null) ...{ 
                writer.close();    //关闭输出文件流 
            } 
        } 
    } 
     
    public static void main(String[] args) ...{ 
        String fileName = "d:\work\temp\newTemp.txt"; 
        WriteToFile.writeFileByBytes(fileName); 
        fileName = "d:\work\temp\newTemp1.txt"; 
        WriteToFile.writeFileByChars(fileName); 
        fileName = "d:\work\temp\newTemp2.txt"; 
        WriteToFile.writeFileByLines(fileName); 
    } 

}