Matcher用法

    String content=”全国人民都幸福”;

         StringBuffer resultBuffer = new StringBuffer();

            Pattern outerPattern = Pattern.compile(“全国|幸福”);

            Pattern innerPattern = Pattern.compile(“幸福”);

            Matcher outerMatcher = outerPattern.matcher(content);

            while(outerMatcher.find()){

                String innerContent = outerMatcher.group();

                StringBuffer innerBuffer = new StringBuffer();

                Matcher innerMatcher = innerPattern.matcher(innerContent);

                while(innerMatcher.find()){

                    innerMatcher.appendReplacement(innerBuffer, “不幸福”);

                }

                innerMatcher.appendTail(innerBuffer);

                outerMatcher.appendReplacement(resultBuffer, innerBuffer.toString());

            }

            outerMatcher.appendTail(resultBuffer);

            System.out.println(resultBuffer);

        }

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