Question

我有以下字符串：

String str1 = "could be";
String str2 = "bigger";

并希望转换此字符串：

String toConvert = "I ||am|| a ||small|| string.";

进入这一个：

"I could be a bigger string."

我怎么能用Java做到这一点？

Answer 1

来自comment：

但如果我不知道分隔符之间的文字？

所以听起来替换值是位置。

最好的方法是使用正则表达式appendReplacement循环：

public static String replace(String input, String... values) {
    StringBuffer buf = new StringBuffer();
    Matcher m = Pattern.compile("\\|{2}(.*?)\\|{2}").matcher(input);
    for (int i = 0; m.find(); i++)
        m.appendReplacement(buf, (i < values.length ? values[i] : m.group(1)));
    return m.appendTail(buf).toString();
}

测试

String toConvert = "I ||am|| a ||small|| string.";
System.out.println(replace(toConvert, "could be")); // "small" is retained without markers
System.out.println(replace(toConvert, "could be", "bigger"));
System.out.println(replace(toConvert, "could be", "bigger", "better")); // "better" is ignored

输出

I could be a small string.
I could be a bigger string.
I could be a bigger string.

在Java中替换分隔符之间的多个子字符串

1 个答案: