Java - 读取Excel csv并打印它们 - changed- new

Question

有人能告诉我Eclipse为什么会给我错误：

Exception in thread "main" java.io.IOException: Stream closed
at java.io.BufferedWriter.ensureOpen(Unknown Source)
at java.io.BufferedWriter.write(Unknown Source)
at java.io.Writer.write(Unknown Source)
at javadruckdruck.main(javadruckdruck.java:52)

我无法得到它。我证明它十次，但它不起作用。

import java.io.*;                      


public class javadruckdruck {

    public static void main(String[] args)   throws IOException
    {



        //scanning
        FileReader       fr = new FileReader ("fax_user.csv")     ;
        BufferedReader   br = new BufferedReader (fr)             ;
        FileWriter       fw = new FileWriter("Druckausgabe.txt")  ;
        BufferedWriter   bw = new BufferedWriter (fw)             ;
        String textnow      = br.readLine ()                      ;
    //  bw.write (Email);
    //  bw.close();

        while (textnow !=null) {


        //Umlaute gegen ae,oe,ue tauschen
        String text = textnow                                     ; 

        String textXreplaced   = text                             ;
        textXreplaced          = text.replace ("ä","ae")          ;
        String textXXreplaced  = textXreplaced                    ;
        textXXreplaced         = textXreplaced.replace ("ü","ue") ;
        String textXXXreplaced = textXXreplaced                   ;
        textXXXreplaced        = textXXreplaced.replace ("ö","oe");
        String textXXXXreplaced= textXXXreplaced.replace("ß","ss");
        textXXXXreplaced       = textXXXreplaced                  ;

        //Text umformatieren, splitten, E-Mail, Nummer anhängen
        String textreplaced = textXXXXreplaced.replace(" ", "")   ;
        String textreplacedtwo = textreplaced.replace("\"","")    ;
        String textreplacedthree = textreplacedtwo.replace(";","");
        String [] parts     = textreplacedthree.split("[,]")      ;
        String part1        = parts[0]                            ;
        String part2        = parts[1]                            ;
        String part3        = parts[2]                            ;
        String Email        = "@bogestra.de"                      ;
        String Zahlen       = ";3"                                ;
        String finished     = part3 + "." + part2 + Email + Zahlen + part1;
        textnow             = br.readLine ()                      ;

        bw.write (finished);
        bw.close();     



        //System Ausgabe      
        //System.out.println(part3 + "." + part2 + Email + Zahlen + part1 );


    }





        br.close();

    }


    }

Answer 1

你在循环中关闭了bw。你应该把这条线移到循环之外：

  public static void main(String[] args)   throws IOException
    {



        //scanning
        FileReader       fr = new FileReader ("fax_user.csv")     ;
        BufferedReader   br = new BufferedReader (fr)             ;
        FileWriter       fw = new FileWriter("Druckausgabe.txt")  ;
        BufferedWriter   bw = new BufferedWriter (fw)             ;
        String textnow      = br.readLine ()                      ;
    //  bw.write (Email);
    //  bw.close();

        while (textnow !=null) {


        //Umlaute gegen ae,oe,ue tauschen
        String text = textnow                                     ; 

        String textXreplaced   = text                             ;
        textXreplaced          = text.replace ("ä","ae")          ;
        String textXXreplaced  = textXreplaced                    ;
        textXXreplaced         = textXreplaced.replace ("ü","ue") ;
        String textXXXreplaced = textXXreplaced                   ;
        textXXXreplaced        = textXXreplaced.replace ("ö","oe");
        String textXXXXreplaced= textXXXreplaced.replace("ß","ss");
        textXXXXreplaced       = textXXXreplaced                  ;

        //Text umformatieren, splitten, E-Mail, Nummer anhängen
        String textreplaced = textXXXXreplaced.replace(" ", "")   ;
        String textreplacedtwo = textreplaced.replace("\"","")    ;
        String textreplacedthree = textreplacedtwo.replace(";","");
        String [] parts     = textreplacedthree.split("[,]")      ;
        String part1        = parts[0]                            ;
        String part2        = parts[1]                            ;
        String part3        = parts[2]                            ;
        String Email        = "@bogestra.de"                      ;
        String Zahlen       = ";3"                                ;
        String finished     = part3 + "." + part2 + Email + Zahlen + part1;
        textnow             = br.readLine ()                      ;

        bw.write (finished);



        //System Ausgabe      
        //System.out.println(part3 + "." + part2 + Email + Zahlen + part1 );


    }
        bw.close();     




        br.close();

    }