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法律Java 中的 Matcher reset() 方法，附带示例
java.util.regex.Matcher 类表示一个用于执行各种匹配操作的引擎。该类没有任何构造方法， يمكنك使用 java.util.regex.Pattern 类的 matches() 方法创建/获取该类的对象。
此类（Matcher）的 reset() 方法会删除所有状态信息，并将字符序列重置为默认值，并将附加位置置零。
示例 1
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class Reset {
public static void main(String[] args) {
String str = "<p>This <b>is</b> an <b>example</b>HTML <b>script</b> where <b>every</b> alternative <b>word</b> is <b>bold</b></p>.";
//Regular expression to match contents of the bold tags
String regex = "<b>(\S+)</b>";
//Creating a pattern object
Pattern pattern = Pattern.compile(regex);
//Matching the compiled pattern in the String
Matcher matcher = pattern.matcher(str);
while (matcher.find()) {
System.out.println("State of the matcher: "+matcher.toMatchResult());
String result = matcher.group(1);
}
matcher = matcher.reset();
System.out.println("State of the matcher after resetting it: "+matcher.toMatchResult());
}
}输出
State of the matcher: java.util.regex.Matcher[pattern=<b>(\S+)</b> region=0,116 lastmatch=<b>is</b>] State of the matcher: java.util.regex.Matcher[pattern=<b>(\S+)</b> region=0,116 lastmatch=<b>example</b>] State of the matcher: java.util.regex.Matcher[pattern=<b>(\S+)</b> region=0,116 lastmatch=<b>script</b>] State of the matcher: java.util.regex.Matcher[pattern=<b>(\S+)</b> region=0,116 lastmatch=<b>every</b>] State of the matcher: java.util.regex.Matcher[pattern=<b>(\S+)</b> region=0,116 lastmatch=<b>>word</b>] State of the matcher: java.util.regex.Matcher[pattern=<b>(\S+)</b> region=0,116 lastmatch=<b>bold</b>] State of the matcher: java.util.regex.Matcher[pattern=<b>(\S+)</b> region=0,116 lastmatch=] State of the matcher after resetting it: java.util.regex.Matcher[pattern=<b>(\S+)</b> region=0,116 lastmatch=]
此方法的另一个变体接受一个字符串数据并使用此数据重置 Matcher。
示例 2
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class Reset {
public static void main(String[] args) {
String str = "<p>This <b>is</b> an <b>example</b> HTML <b>script</b> where <b>every</b> alternative <b>word</b> is <b>bold</b></p>.";
//Regular expression to match contents of the bold tags
String regex = "(\S+)";
//Creating a pattern object
Pattern pattern = Pattern.compile(regex);
//Matching the compiled pattern in the String
Matcher matcher = pattern.matcher(str);
while (matcher.find()) {
System.out.println("State of the matcher: "+matcher.toMatchResult());
String result = matcher.group(1);
}
matcher = matcher.reset("<b>this</b> is <b>new</b> string <b>after</b> reset");
while (matcher.find()) {
System.out.println("State of the matcher after resetting it: "+matcher.toMatchResult());
}
}
}输出
State of the matcher: java.util.regex.Matcher[pattern=<b>(\S+)</b> region=0,116 lastmatch=<b>is</b>] State of the matcher: java.util.regex.Matcher[pattern=<b>(\S+)</b> region=0,116 lastmatch=<b>example</b>] State of the matcher: java.util.regex.Matcher[pattern=<b>(\S+)</b> region=0,116 lastmatch=<b>script</b>] State of the matcher: java.util.regex.Matcher[pattern=<b>(\S+)</b> region=0,116 lastmatch=<b>every</b>] State of the matcher: java.util.regex.Matcher[pattern=<b>(\S+)</b> region=0,116 lastmatch=<b>word</b>] State of the matcher: java.util.regex.Matcher[pattern=<b>(\S+)</b> region=0,116 lastmatch=<b>bold</b>] State of the matcher after resetting it: java.util.regex.Matcher[pattern=<b>(\S+)</b> region=0,51 lastmatch=<b>this</b>] State of the matcher after resetting it: java.util.regex.Matcher[pattern=<b>(\S+)</b> region=0,51 lastmatch=<b>new</b>] State of the matcher after resetting it: java.util.regex.Matcher[pattern=<b>(\S+)</b> region=0,51 lastmatch=<b>after</b>]
更新于：20-Nov-2019
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