String格式转换 --去符号

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本文详细介绍了一种使用Java进行CSV数据处理的方法，通过自定义的CSVUtil工具类实现数据的逗号分隔和行分隔，展示了如何将字符串数组转换为CSV格式的字符串，并通过实例演示了整个过程。

public static void main(String[] args) {
        String head = CSVUtil.joinByLineSeparator(Arrays.asList(CSVUtil.joinByCommas(new String[]{
                "1", "2", "3", "4"
        })));

        System.out.println("head = " + head);
        List<String> strings = Arrays.asList(CSVUtil.joinByCommas(new String[]{"1", "2", "3", "4"}));
        String string = strings.toString();
        System.out.println("string = " + string);
        System.out.println("STRINGS="+strings);
    }

在这里插入图片描述

  // 转换工具类
    static class CSVUtil {

        static String joinByCommas(String[] cols) {
            List<String> colList = Arrays.asList(cols);
            return joinByCommas(colList);
        }

        static String joinByCommas(List<String> colList) {

            return join(colList, ",");
        }

        static String joinByLineSeparator(String[] lines) {
            List<String> lineList = Arrays.asList(lines);
            return joinByLineSeparator(lineList);
        }

        static String joinByLineSeparator(List<String> lineList) {
            return join(lineList, System.getProperty("line.separator"));
        }

        static String join(List<String> strList, String separator) {
            if (CollectionUtils.isEmpty(strList)) {
                return "";
            } else if (strList.size() > 1) {
                String first = StringUtils.isNotEmpty(strList.get(0)) ? strList.get(0) : "";
                return first.concat(separator).concat(join(strList.subList(1, strList.size()), separator));
            } else {
                return strList.get(0);
            }
        }

    }