Question

我试图获取打印输出并将其存储到字符串数组中，以便将值写入CSV文件中。出现的问题是，当运行代码时，从100行打印，只存储最后一行：

public void organize(String line) throws IOException {
    CSVWriter writer = new CSVWriter(new FileWriter("out.csv"), '\t');

    String[] token = line.split(",");
    String[] DependencyItems = token[1].split(" ");
    List<String> entriesList;
    String[] entries;
    String row = "";

    for (int i = 0; i < DependencyItems.length; i++) {
            row = token[0] + "," + DependencyItems[i] + "," + token[2] + "," + token[3] + "," + token[5]+ "," + token[6]
            + "," + token[7]+ "," + token[8]+ "," + token[9] + "," + token[10] + "," + token[11] + "," + token[12]
            + "," + token[13] + "," + token[14] + "," + token[15] + "," + token[16]+ "," + token[17]
            + "," + token[18]+ "," + token[19]+ "," + token[20]+ "," + token[21] + "," + token[22]
            + "," + token[23]+ "," + token[24]+ "," + token[25]+ "," + token[26]+ "," + token[27]
            + "," + token[28]+ "," + token[29];
    }
    System.out.println(row);
    entriesList = Arrays.asList(row);
    entries = entriesList.toArray(new String[0]);
    writer.writeNext(entries);
    writer.close();
}

我做错了什么？

Answer 1

row = <big long string>

您总是重置row，然后循环后的所有内容只是使用行的最后一个值。如果要使用所有值，可能循环后的代码应该在循环中？至少看起来这两行属于循环。

System.out.println(row);
entriesList = Arrays.asList(row);

请注意，如果row的范围仅限于循环内部，那么这可能有助于识别此类问题，因为它在循环之外无效。

CSVWriter只在Java中写入最后一行

1 个答案: