Question

java 正则表达式替换字符

我想把"requirement":"lt","threshold_value":"300","alert_num":"1","unit":"s"
替换成"requirement":"lt","threshold_value":["300"],"alert_num":"1","unit":"s"
也有这种字符串"requirement":"lt","threshold_value":"300","200","alert_num":"1","unit":"s"
需要替换成"requirement":"lt","threshold_value":["300","200"],"alert_num":"1","unit":"s"
现在我代码是这样：
String srcString = "\"requirement\":\"lt\",\"threshold_value\":\"300\",\"alert_num\":\"1\",\"unit\":\"s\"";
System.out.println(srcString);
//String s = "11111111111111x\"123\"x111111111";
srcString= srcString.replaceAll("threshold_value\":\"*\"", "threshold_value\":[\"");
System.out.println(srcString);
替换出来是这样的"requirement":"lt","threshold_value":["300","alert_num":"1","unit":"s"
求解。。。要用replaceAll正则。。。。

Answer 1

(\"threshold_value\":)((?:,?\"\\d+\")+)
替换成
\\1[\\2]

追问

结果变成这样了"requirement":"lt",1[2],"alert_num":"1","unit":"s"
应该变成这样："requirement":"lt","threshold_value":["300"],"alert_num":"1","unit":"s"

追答

srcString.replaceAll("(\"threshold_value\":)((?:,?\"\\d+\")+)", "$1[$2]");

Answer 2

package zhidao;

public class Ex4_9
{
	public static void main ( String args[] )
	{
		String str1 = "\"requirement\":\"lt\",\"threshold_value\":\"300\",\"alert_num\":\"1\",\"unit\":\"s\"";
		String reg = "(\\:)((\"\\d+\",?)+)(,.*)";
		System.out.println (str1.replaceAll (reg, "$1[$2]$4"));
		
		String str2 = "\"requirement\":\"lt\",\"threshold_value\":\"300\",\"200\",\"alert_num\":\"1\",\"unit\":\"s\"";
		System.out.println (str2.replaceAll (reg, "$1[$2]$4"));
	}
}