java 正则表达式 用法

import java.util.regex.*;//正则表达式 引用

//复杂的字符串
String input="{\"pbxToken\":\"1ja930jsdlij912h94hk5l35poeweer\"}"+"{\"LS_CallStatus_Event_Type\":\"\",\"callId\":\"1701843953.1377\",\"callStatus_memberType\":\"Inbound\",\"inbound\":{\"callpath\":\"1234\",\"channelid\":\"PJSIP/trunk-MNWG-endpoint-00000397\",\"from\":\"13941128270\",\"memberstatus\":\"ALERT\",\"to\":\"1234\",\"trunkname\":\"MNWG\"},\"statusEnum\":\"OneMember_inboundAlert_callpath\",\"timeMillis\":1701843898676}---inbound---{\"callpath\":\"1234\",\"channelid\":\"PJSIP/trunk-MNWG-endpoint-00000397\",\"from\":\"13941128270\",\"memberstatus\":\"ALERT\",\"to\":\"1234\",\"trunkname\":\"MNWG\"}";

//使用正则表达式提取电话号码
//电话号码为 不带小数点的数字
Pattern pattern = Pattern.compile("\"from\":\"(\\d+)\"");
Matcher matcher = pattern.matcher(input);
if (matcher.find()) {
    String phoneNumber = matcher.group(1);
    logger.debug("====电话号码：" + phoneNumber );
} else {
    logger.debug("==== " +"未找到电话号码" );
}

//callId为 带小数点的数字
Pattern patternCallId = Pattern.compile("\"callId\":\"(\\d+\\.\\d+)\"");
Matcher matcheCallId = patternCallId.matcher(input);
if (matcheCallId.find()) {
   String callId = matcheCallId.group(1);
   System.out.println("提取的callId是：" + callId);
} else {
   System.out.println("未找到callId");
}