如何使用regex java合并两个XML文件

Question

String stra = "<?xml version=\"1.0\"?><voic:SetVoicemail xmlns:voic=\"http://schemas.ericsson.com/ma/CA/VOICEMAILRFS/\"><voic:msisdn>14184400787</voic:msisdn><voic:imsi>302510200240231</voic:imsi></voic:SetVoicemail>";
String strb="<?xml version=\"1.0\"?><voic:SetVoicemail xmlns:voic=\"http://schemas.ericsson.com/ma/CA/VOICEMAILRFS/\"><line><action>add</action></line><line><action>update</action></line></voic:SetVoicemail>";

//create a pattern object
Pattern pattern = Pattern.compile("<voic:SetVoicemail>(.*)</voic:SetVoicemail>");
String combinedString="";
//create a matcher object
Matcher matcher = pattern.matcher(stra);

if( matcher.find() ) {
    combinedString=combinedString+matcher.group(1);
}
matcher = pattern.matcher(strb);
if( matcher.find() ) {
    combinedString=combinedString+matcher.group(1);
}
System.out.println(combinedString);

我正在尝试通过字符串将根数据合并为一个，但无法这样做。请帮助。

Answer 1

由于stra和strb均以开头，因此将找不到您的模式

<voic:SetVoicemail>

我假设您想要丢弃属性：voic。考虑以下代码：

String stra = "<?xml version=\"1.0\"?><voic:SetVoicemail xmlns:voic=\"http://schemas.ericsson.com/ma/CA/VOICEMAILRFS/\"><voic:msisdn>14184400787</voic:msisdn><voic:imsi>302510200240231</voic:imsi></voic:SetVoicemail>";
String strb="<?xml version=\"1.0\"?><voic:SetVoicemail xmlns:voic=\"http://schemas.ericsson.com/ma/CA/VOICEMAILRFS/\"><line><action>add</action></line><line><action>update</action></line></voic:SetVoicemail>";
StringBuilder sb = new StringBuilder(stra.length() + strb.length());
sb.append("<?xml version=\"1.0\"?><voic:SetVoicemail>");

Pattern pattern = Pattern.compile("<voic:SetVoicemail .+?>(.+)</voic:SetVoicemail>");
Matcher matcher = pattern.matcher(stra);
if (matcher.find()) {
    sb.append(matcher.group(1));
}
matcher = pattern.matcher(strb);
if (matcher.find()) {
    sb.append(matcher.group(1));
}
sb.append("</voic:SetVoicemail>");
System.out.println(sb);

运行上面的代码会产生以下输出：

<?xml version="1.0"?><voic:SetVoicemail><voic:msisdn>14184400787</voic:msisdn><voic:imsi>302510200240231</voic:imsi><line><action>add</action></line><line><action>update</action></line></voic:SetVoicemail>