java.time.Matcher.appendReplacement(StringBuffer sb，String replacement)方法实现了附加和替换操作。
Matcher appendReplacement - 声明
public Matcher appendReplacement(StringBuffer sb, String replacement)
sb - 目标字符串缓冲区。
replacement - 替换字符串。
Matcher appendReplacement - 异常情况
IllegalStateException - 如果尚未尝试匹配，或者先前的匹配操作失败。
IllegalArgumentException - 如果替换字符串指向模式中不存在的命名捕获组。
IndexOutOfBoundsException - 如果替换字符串指向模式中不存在的捕获组。
Matcher appendReplacement - 示例
下面的示例显示java.time.Matcher.appendReplacement(StringBuffer sb，String replacement)方法的用法。
package com.learnfk;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class MatcherDemo {
private static String REGEX = "a*b";
private static String INPUT = "aabfooaabfooabfoob";
private static String REPLACE = "-";
public static void main(String[] args) {
Pattern pattern = Pattern.compile(REGEX);
</span><span class="com">//获取匹配器对象</span><span class="pln">
</span><span class="typ">Matcher</span><span class="pln"> matcher </span><span class="pun">=</span><span class="pln"> pattern</span><span class="pun">.</span><span class="pln">matcher</span><span class="pun">(</span><span class="pln">INPUT</span><span class="pun">);</span><span class="pln">
</span><span class="typ">StringBuffer</span><span class="pln"> buffer </span><span class="pun">=</span><span class="pln"> </span><span class="kwd">new</span><span class="pln"> </span><span class="typ">StringBuffer</span><span class="pun">();</span><span class="pln">
</span><span class="kwd">while</span><span class="pun">(</span><span class="pln">matcher</span><span class="pun">.</span><span class="pln">find</span><span class="pun">())</span><span class="pln"> </span><span class="pun">{</span><span class="pln">
matcher</span><span class="pun">.</span><span class="pln">appendReplacement</span><span class="pun">(</span><span class="pln">buffer</span><span class="pun">,</span><span class="pln"> REPLACE</span><span class="pun">);</span><span class="pln">
</span><span class="pun">}</span><span class="pln">
matcher</span><span class="pun">.</span><span class="pln">appendTail</span><span class="pun">(</span><span class="pln">buffer</span><span class="pun">);</span><span class="pln">
</span><span class="typ">System</span><span class="pun">.</span><span class="kwd">out</span><span class="pun">.</span><span class="pln">println</span><span class="pun">(</span><span class="pln">buffer</span><span class="pun">.</span><span class="pln">toString</span><span class="pun">());</span><span class="pln">
}
}
让无涯教程编译并运行以上程序，这将产生以下输出-
-foo-foo-foo-
