电子商务技术基础第5章输入输出流.ppt

* import java.io.*; public class DemoFileRW{ public static void main(String args[ ]){ File file=new File(hello.txt); try{ FileWriter out=new FileWriter(file); out.write(欢迎Tom!!!); out.close(); FileReader in=new FileReader(file); char[] inchar=new char[100]; int len=in.read(inchar); String str=new String(inchar,0,len); System.out.println(str); in.close(); } catch(IOException e){ System.out.println(e); } } } * void write(String s,int off,int len) 把字符串s的一部分写入到目的地。 * import java.io.*; public class BufferedRWDemo { public static void main(String[] args) { try { BufferedReader bufReader = new BufferedReader( new InputStreamReader(System.in)); File outFile=new File(result.txt); BufferedWriter bufWriter = new BufferedWriter(new FileWriter(outFile)); String input = null; while(!(input = bufReader.readLine()).equals(quit)) { bufWriter.write(input); bufWriter.newLine(); } bufReader.close(); bufWriter.close(); } catch(ArrayIndexOutOfBoundsException e) { e.printStackTrace(); } catch(IOException e) { e.printStackTrace(); } } } * * /blog/static/382167972011669267672/ * /blog/static/382167972011669267672/ * import java.io.*; class Goods implements Serializable{ String name=null; double unitPrice; Goods(String name,double unitPrice){ =name; this.unitPrice=unitPrice; } public void setUnitPrice(double unitPrice){ this.unitPrice=unitPrice; } public void setName(String name){ =name; } public String getName(){ return name; } public double getUnitPrice(){ return unitPrice; } } public class DemoSerializable{ public static void main(String args[ ]){ Goods TV1=new Goods(Haier,3468); Goods TV2=new Goods(Samsung,3868); System.out.printf(\nTV1:%s,%f,TV1.getName(),TV1.getUnitPrice()); System.out.printf(\nTV2:%s,%f,TV2.getName(),TV2.getUnitPrice()); try{ FileOutputStream fileOut=new FileOutputStream(a.txt); ObjectOutputStream objectOut=new ObjectOutputStream(fil