Question

我正在一个项目中，我需要比较2个CSV的相等性。它在每个CSV中只有一行，具有多列，并以不同的形式报告列名称和值的差异。例如：

CSV 1 : 
Name   Roll No  Dept
Brij   1        IT

CSV 2 :
Name   Roll No  Dept
Brij   2        IT

I need to report the diff as 
Roll No 1 does not match Roll No 2 i.e. Col name and value in both csvs

My work till now : 
@Test
    public void f() {
        try {
            FileReader reader1 = new FileReader(
                    new File(System.getProperty("user.dir") + "\\src\\test\\resources\\csvFile\\Reader.csv"));
            FileReader reader2 = new FileReader(
                    new File(System.getProperty("user.dir") + "\\src\\test\\resources\\csvFile\\Reader - Copy.csv"));

            CSVReader csvReader1 = new CSVReader(reader1);
            CSVReader csvReader2 = new CSVReader(reader2);
            String[] nextRecordReader1;
            String[] nextRecordReader2;
            // we are going to read data line by line
            while ((nextRecordReader1 = csvReader1.readNext()) != null
                    && (nextRecordReader2 = csvReader2.readNext()) != null) {
                checkEquality(nextRecordReader1, nextRecordReader2);
            }

        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }

    public void checkEquality(String[] s1, String[] s2) {
        if (s1 == s2) {}

        if (s1 == null || s2 == null) {}

        int n = s1.length;
        if (n != s2.length) {}

        for (int i = 0; i < n; i++) {
            if (!s1[i].trim().equals(s2[i].trim())) {
                System.out.println(s1[i] + " is not equal to " + s2[i]);
            }
        }

    }

这给了我以下结果： 1不等于2

我无法提及列名。我该怎么办？

Answer 1

public void checkEquality(String[] s1, String[] s2) {
        if (s1 == s2) {}

        if (s1 == null || s2 == null) {}

        String[] headers= new String[]{"Name","Roll No","Dept"};
        int n = s1.length;
        if (n != s2.length) {}

        for (int i = 0; i < n; i++) {
            if (!s1[i].trim().equals(s2[i].trim())) {
                System.out.println(headers[i]+" "+s1[i] + " is not equal to " headers[i]+"  "+ s2[i]);
            }
        }

    }

您需要一个用于保存列标题的集合，并使用该集合基于索引获取标题。

Answer 2

    enter code here


public class SampleTest {
    int rowCountCounter;
    String[] headers1;
    String[] headers2;

    @Test
    public void f() {
        try {
            FileReader reader1 = new FileReader(
                    new File(System.getProperty("user.dir") + "\\src\\test\\resources\\csvFile\\Reader.csv"));
            FileReader reader2 = new FileReader(
                    new File(System.getProperty("user.dir") + "\\src\\test\\resources\\csvFile\\Reader - Copy.csv"));

            CSVReader csvReader1 = new CSVReader(reader1);
            CSVReader csvReader2 = new CSVReader(reader2);
            String[] nextRecordReader1;
            String[] nextRecordReader2;
            rowCountCounter=0;
            // we are going to read data line by line
            while ((nextRecordReader1 = csvReader1.readNext()) != null
                    && (nextRecordReader2 = csvReader2.readNext()) != null) {
                if(rowCountCounter==0) {
                    headers1=nextRecordReader1;
                    headers2=nextRecordReader2;
                }
                checkEquality(nextRecordReader1, nextRecordReader2);
                rowCountCounter++;
            }

        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }

    public void checkEquality(String[] s1, String[] s2) {
        if (s1 == s2) {}

        if (s1 == null || s2 == null) {}

        int n = s1.length;
        if (n != s2.length) {
            System.out.println("Header in CSV1 " + n + " is not equal to header in CSV2 " + s2.length);
        }
        boolean headerFlag=true;
        for (int i = 0; i < n; i++) {
            if(rowCountCounter==0) {
                if (!s1[i].trim().equals(s2[i].trim())) {
                    System.out.println("CSV1 header "+s1[i] + " is not equal to CSV2 header " + s2[i]);
                    headerFlag=false;
                }
            }else {
                if (!s1[i].trim().equals(s2[i].trim())) {
                    System.out.println("CSV1 "+headers1[i] +" cellvalue "+" \"" +s1[i] +"\"" +" is not equal to CSV2 " + headers2[i]+" value \""+s2[i]+"\"");
                    headerFlag=false;
                }
//              else {
//                  System.out.println("CSV data is equal");
//              }

            }

        }
        if(headerFlag==true && rowCountCounter==0) {
            System.out.println("CSV headers are equal.Below are the headers");
            for(int k=0;k<s1.length;k++) {
                System.out.print(s1[k]+" ");
            }
        }

        if(headerFlag==true && rowCountCounter!=0) {
            System.out.println("CSV data is equal.");
        }

    }
}

CSV与CSV比较实用程序

2 个答案: