字符串占位符替换

import org.springframework.util.PropertyPlaceholderHelper;

import java.util.Properties;

public class PlaceholderUtil {
    private static PropertyPlaceholderHelper helper = new PropertyPlaceholderHelper(
            "#{", "}", ":", false);

    public static String replacePlaceholders(String value, final Properties properties) {
       return helper.replacePlaceholders(value, properties);
    }

}

String time = String.format("%tc", date);

Object[] valueArr= {"aaa", 123};
MessageFormatter.arrayFormat("str {} int {}", valueArr).getMessage();

// {} 定位变量位置
// \{} 表示 跳过该对括号
// 前面再加 \ 则取消跳过