CSV文件Uploader to Array

Question

我已创建此代码，但不知道为什么它不起作用。代码不会打印csvfile的所有行。

        try{
            File csvfile = new File(FullPath);
            FileInputStream csvStream = new FileInputStream(csvfile);
            BufferedReader in = new BufferedReader(new InputStreamReader(csvStream));
            String line;

            int iCount=0;
                    while ((line = in.readLine()) != null){
                        String[] RowData = line.split(",");
                        name[iCount] = RowData[0];
                        Toast.makeText(NewMessage.this, "CSV", 2000).show();
                        number[iCount] = RowData[1];
                        iCount++;

        }
                    in.close();
                    Toast.makeText(NewMessage.this, "CSV Has uploaded", 2000).show();
        }
        catch(Exception e)
        {
            e.printStackTrace();
        }

Answer 1

如果问题是没有打印文件的所有行，则在循环中覆盖数组。你应该编辑你的问题，因为数组正在运行，真正的问题是文件没有打印所有行。

以下是名称，数字格式的解决方案：

    import java.io.BufferedInputStream;
    import java.io.BufferedReader;
    import java.io.File;
    import java.io.FileInputStream;
    import java.io.IOException;
    import java.io.InputStream;
    import java.io.InputStreamReader;

    public class Teste {

        public static void main(String[] args) throws IOException {
            Teste x = new Teste();
            x.doTeste();
        }




        public void doTeste() throws IOException{
            String fileName = "D:\\Projetos\\Testes\\src\\teste.txt"; 
            BufferedReader in = null;
            try{

                File csvfile = new File(fileName);
                FileInputStream csvStream = new FileInputStream(csvfile);
                in = new BufferedReader(new InputStreamReader(csvStream));
                String line;
                String[] rowName = new String[(countLines(fileName)+1)];
                String[] rowNameData = new String[(countLines(fileName)+1)];

                int linha = 0;


                while ((line = in.readLine()) != null){
                    String[] array = line.split(",");
                    rowName[linha] = array[0];
                    rowNameData[linha] = array[1];
                    ++linha;
                }

                System.out.println("The rowName ARRAY");
                for (String s: rowName){
                    System.out.println(s);
                }

                System.out.println("The rowNameData ARRAY");
                for (String s: rowNameData){
                    System.out.println(s);
                }

            }
            catch(Exception e)
            {
                e.printStackTrace();
            }
            finally {
                in.close();
            }
        }

        public static int countLines(String filename) throws IOException {
            InputStream is = new BufferedInputStream(new FileInputStream(filename));
            try {
                byte[] c = new byte[1024];
                int count = 0;
                int readChars = 0;
                boolean empty = true;
                while ((readChars = is.read(c)) != -1) {
                    empty = false;
                    for (int i = 0; i < readChars; ++i) {
                        if (c[i] == '\n') {
                            ++count;
                        }
                    }
                }
                return (count == 0 && !empty) ? 1 : count;
            } finally {
                is.close();
            }
        }


    }

并在一行中输入名称，并在下一行编号：

    import java.io.BufferedInputStream;
    import java.io.BufferedReader;
    import java.io.File;
    import java.io.FileInputStream;
    import java.io.IOException;
    import java.io.InputStream;
    import java.io.InputStreamReader;

    public class Teste {

            public static void main(String[] args) throws IOException {
                Teste x = new Teste();
                x.doTeste();
            }




            public void doTeste() throws IOException{
                String fileName = "D:\\Projetos\\Testes\\src\\teste.txt"; 
                BufferedReader in = null;
                try{

                    File csvfile = new File(fileName);
                    FileInputStream csvStream = new FileInputStream(csvfile);
                    in = new BufferedReader(new InputStreamReader(csvStream));
                    String line;
                    String[] rowName = new String[(countLines(fileName)+1)/2];
                    String[] rowNameData = new String[(countLines(fileName)+1)/2];

                    int iCount=0;
                    int x = 0;
                    int y = 0;


                    while ((line = in.readLine()) != null){
                        if (iCount == 0 || iCount%2 == 0) {
                        rowName[x] = line;
                        ++x;
                        }
                        else {
                            rowNameData[y] = line; 
                            ++y;
                        }
                        iCount++;

                    }

                    System.out.println("The rowName ARRAY");
                    for (String s: rowName){
                        System.out.println(s);
                    }

                    System.out.println("The rowNameData ARRAY");
                    for (String s: rowNameData){
                        System.out.println(s);
                    }

                }
                catch(Exception e)
                {
                    e.printStackTrace();
                }
                finally {
                    in.close();
                }
            }

            public static int countLines(String filename) throws IOException {
                InputStream is = new BufferedInputStream(new FileInputStream(filename));
                try {
                    byte[] c = new byte[1024];
                    int count = 0;
                    int readChars = 0;
                    boolean empty = true;
                    while ((readChars = is.read(c)) != -1) {
                        empty = false;
                        for (int i = 0; i < readChars; ++i) {
                            if (c[i] == '\n') {
                                ++count;
                            }
                        }
                    }
                    return (count == 0 && !empty) ? 1 : count;
                } finally {
                    is.close();
                }
            }


        }