我如何用数组中的值替换字符串中的字符或字符串的所有实例?
例如
String testString = "The ? ? was ? his ?";
String[] values = new String[]{"brown", "dog", "eating", "food"};
String needle = "?";
String result = replaceNeedlesWithValues(testString,needle,values);
//result = "The brown dog was eating his food";
方法签名
public String replaceNeedlesWithValues(String subject, String needle, String[] values){
//code
return result;
}
答案 0 :(得分:8)
使用String.format
:
public static String replaceNeedlesWithValues(String subject, String needle, String[] values) {
return String.format(subject.replace("%", "%%")
.replace(needle, "%s"),
values);
}
: - )
当然,您可能只想直接使用String.format
:
String.format("The %s %s was %s his %s", "brown", "dog", "eating", "food");
// => "The brown dog was eating his food"
答案 1 :(得分:1)
如果您的字符串包含需要替换的模式,则可以在Matcher类中使用appendReplacement方法。
例如:
StringBuffer sb = new StringBuffer();
String[] tokens = {"first","plane tickets","friends"};
String text = "This is my 1 opportunity to buy 2 for my 3";
Pattern p = Pattern.compile("\\d");
Matcher m = p.matcher(text);
for(int i=0; m.find(); i++) {
m.appendReplacement(sb, tokens[i]);
}
m.appendTail(sb);