正则表达式删除 CSV 中双引号内的换行符答案

【问题标题】：Regex to remove line break within double quote in CSV正则表达式删除 CSV 中双引号内的换行符
【发布时间】：2020-08-15 01:58:58
【问题描述】：

您好，我有一个 csv 文件，其中有错误。所以我希望它用正则表达式更正，一些字段包含换行符，示例如下

"AHLR150","CDS","-1","MDCPBusinessRelationshipID",,,"Investigating","1600 Amphitheatre Pkwy

California",,"Mountain View",,"United States",,"California",,,"94043-1351","9958"

以上两行应该在一行

"AHLR150","CDS","-1","MDCPBusinessRelationshipID",,,"Investigating","1600 Amphitheatre PkwyCalifornia",,"Mountain View",,"United States",,"California",,,"94043-1351","9958"

我尝试使用下面的正则表达式，但它没有帮助我

%s/\\([^\"]\\)\\n/\\1/

【问题讨论】：

双引号内的换行符在 CSV 中是合法的（至少，在最常见的方言中，因为没有单一标准）。如果需要在字段中包含换行符，这是最常见的方式。只需将这些行粘贴在一起，您就是在破坏 Google 的地址。

标签： java regex string

【解决方案1】：

试试这个：

public static void main(String[] args) {
    String input = "\"AHLR150\",\"CDS\",\"-1\",\"MDCPBusinessRelationshipID\","
            + ",,\"Investigating\",\"1600 Amphitheatre Pkwy\n"
            + "California\",,\"Mountain View\",,\"United\n"
            + "States\",,\"California\",,,\"94043-1351\",\"9958\"\n";

    Matcher matcher = Pattern.compile("\"([^\"]*[\n\r].*?)\"").matcher(input);
    Pattern patternRemoveLineBreak = Pattern.compile("[\n\r]");

    String result = input;
    while(matcher.find()) {
        String quoteWithLineBreak = matcher.group(1);
        String quoteNoLineBreaks = patternRemoveLineBreak.matcher(quoteWithLineBreak).replaceAll(" ");
        result = result.replaceFirst(quoteWithLineBreak, quoteNoLineBreaks);
    }

    //Output
    System.out.println(result);
}

输出：

"AHLR150","CDS","-1","MDCPBusinessRelationshipID",,,"Investigating","1600 Amphitheatre Pkwy California",,"Mountain View",,"United States",,"California",,,"94043-1351","9958"

【讨论】：

【解决方案2】：

基于this，您可以尝试：

/\r?\n|\r/

我检查了here，似乎没问题

【讨论】：

他们只想删除引用字符串中的换行符，而不是所有个换行符。
@user12176589 它无法正常工作，因为我在您提供的链接中进行了检查，我只想删除双引号内的 \r\n