java占位符替换五种方式小结

String TEMPLATE = "姓名：${name!}，年龄：${age!}，手机号：${phone!}";

private static final Map<String, String> ARGS = new HashMap<String, String>() {{
        put("name", "张三");
        put("phone", "10086");
        put("age", "21");
    }};

String replace(String text, String searchString, String replacement);

String remark = TEMPLATE;
for (Map.Entry<String, String> entry : ARGS.entrySet()) {
    remark = StringUtils.replace(remark, "${" + entry.getKey() + "!}", entry.getValue());
}
System.out.println(remark);

Pattern TEMPLATE_ARG_PATTERN = Pattern.compile("\\$\\{(.+?)!}"); // ${param!}
Matcher m = TEMPLATE_ARG_PATTERN.matcher(TEMPLATE);
StringBuffer sb = new StringBuffer();
while (m.find()) {
    String arg = m.group(1);
    String replaceStr = ARGS.get(arg);
    m.appendReplacement(sb, replaceStr != null ? replaceStr : "");
}
m.appendTail(sb);
System.out.println(sb.toString());

public <V> StringSubstitutor(Map<String, V> valueMap);
public <V> StringSubstitutor(Map<String, V> valueMap, String prefix, String suffix);

StringSubstitutor sub = new StringSubstitutor(ARGS,"${","!}");
System.out.println(sub.replace(TEMPLATE));

String template = "Hello, my home is {0} and I am {1} years old.";
Object[] replageArgs ={"Alice",25};
String message = MessageFormat.format(template, replageArgs);

String template = "Hello, my name is %s and I am %d years old.";
Object[] replageArgs ={"Alice",25};

String message = String.format(template, replageArgs);
System.out.println(message); // 输出：Hello, my name is Alice and I am 25 years old.