Java 解释工作正则表达式

找到此代码，如果包含双引号，则将CSV字段分隔开 但是我不太理解正则表达式中的模式匹配

如果有人能给我一个逐步解释这个表达式如何计算一个模式，我将不胜感激

"([^\"]*)"|(?<=,|^)([^,]*)(?:,|$)

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“（[^\“]*）”|（？我试图给你一些提示和所需的词汇，以便找到非常好的解释

“（[^\“]*）”|（？
“（[^\“]*）”|（？如果需要，可以链接到另一个答案，这比在没有任何参考的情况下复制整个答案更有用。
import java.util.ArrayList; 
import java.util.regex.Matcher; 
import java.util.regex.Pattern; 

public class CSVParser { 

    /* 
     * This Pattern will match on either quoted text or text between commas, including 
     * whitespace, and accounting for beginning and end of line. 
     */ 
    private final Pattern csvPattern = Pattern.compile("\"([^\"]*)\"|(?<=,|^)([^,]*)(?:,|$)");   
    private ArrayList<String> allMatches = null;         
    private Matcher matcher = null; 
    private String match = null; 
    private int size; 

    public CSVParser() {                 
        allMatches = new ArrayList<String>(); 
        matcher = null; 
        match = null; 
    } 

    public String[] parse(String csvLine) { 
        matcher = csvPattern.matcher(csvLine); 
        allMatches.clear(); 
        String match; 
        while (matcher.find()) { 
                match = matcher.group(1); 
                if (match!=null) { 
                        allMatches.add(match); 
                } 
                else { 
                        allMatches.add(matcher.group(2)); 
                } 
        } 

        size = allMatches.size();                
        if (size > 0) { 
                return allMatches.toArray(new String[size]); 
        } 
        else { 
                return new String[0]; 
        }                        
    }    

    public static void main(String[] args) {             
        String lineinput = "the quick,\"brown, fox jumps\",over,\"the\",,\"lazy dog\""; 

        CSVParser myCSV = new CSVParser(); 
        System.out.println("Testing CSVParser with: \n " + lineinput); 
        for (String s : myCSV.parse(lineinput)) { 
                System.out.println(s); 
        } 
    } 

} 

"([^\"]*)"|(?<=,|^)([^,])(?:,|$)

"([^\"]*)"|(?<=,|^)([^,]*)(?:,|$)

() capture group
(?:) non-capture group
[] any character within the bracket matches
\ escape character used to match operators aka "
(?<=) positive lookbehind (looks to see if the contained matches before the marker)
| either or operator (matches either side of the pipe)
^ beginning of line operator
* zero or more of the preceding character
$ or \z end of line operator