Question

有一个错误，第3部分需要在另一条线上设置我无法找到我的错误。
我在哪里需要设置第3部分来解决这个问题？

import java.io.*;                      

public class javadruckdruckextended {

    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("Druckausgabe123.txt");
        BufferedWriter bw = new BufferedWriter (fw);
        String textnow = br.readLine ();
        String n = System.getProperty("line.separator");

        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 textreplacedfour = textreplacedthree.replace(".",","); // Um das "Dr." bei Friedbert Maas wegzusplitten. 

            String [] parts = textreplacedfour.split(",");

            /* Zur Fehlerkontrolle  
             *  if (parts.length<3) { System.out.println(textnow);}
             * else { 
             */      
             String Email = "@bogestra.de";                      
             String Zahlen = ";3";                                
             String part1 = parts[0];                           
             String part2 = parts[1];                  
             String part3 = parts[2];

             if (parts.length < 2){ 
                 String Sonderfalleins = part2 + Email + Zahlen + part1;
                 bw.write (Sonderfalleins);  
             } //close if
             else {
                 if  (parts.length > 3) {
                     String part4 = parts[3]; 
                     String Sonderfallzwei = part3 + "." + part4 + Email + Zahlen + part1;
                     bw.write (Sonderfallzwei);
                 } //close if
                 else {     
                     String part3zwei = parts[2]; //vielleicht Entfernung                           
                     String finished  = part3zwei + "." + part2 + Email + Zahlen + part1;
                     textnow = br.readLine();
                     bw.write(finished + n );
                     bw.flush();
                 } //close else 2       
             }//close else 1
         } //close while

         textnow = br.readLine();
         bw.flush();
         bw.close(); 
         br.close(); 

    } //close static void main String                                            
} //close class

Answer 1

这里的作业和长度检查明显无序：

    String part1 = parts[0];
    String part2 = parts[1];
    String part3 = parts[2];

    if (parts.length < 2) {
        String Sonderfalleins = part2 + Email + Zahlen + part1;
        bw.write(Sonderfalleins);
    } else {
        if (parts.length > 3) {
            String part4 = parts[3];
            String Sonderfallzwei = part3 + "." + part4 + Email + Zahlen + part1;
            bw.write(Sonderfallzwei);
        } //close if

也就是说，在检查实际存在之前，您正在引用parts[1]。如果parts.length < 2则parts[1]会抛出ArrayIndexOutOfBoundsException。 parts[3]也是如此。

这是一个可能的简单修复：

    String part1 = parts[0];

    if (parts.length < 2) {
        String part2 = parts[1];
        String Sonderfalleins = part2 + Email + Zahlen + part1;
        bw.write(Sonderfalleins);
    } else {
        if (parts.length > 3) {
            String part3 = parts[2];
            String part4 = parts[3];
            String Sonderfallzwei = part3 + "." + part4 + Email + Zahlen + part1;
            bw.write(Sonderfallzwei);
        } //close if

Java - csv读取和重写部分错误 - 在哪里设置cmd第3部分？

1 个答案: