JAVA 字符串替换占位符

JAVA 字符串替换占位符

1 MessageFormat.format()

1. code

public static void main(String[] args) {
	String a= "123";
	String b= "321";
	String c= "c";
	System.out.println(MessageFormat.format(" {0} {1} {2} {3}", a, b,"",c));
	System.out.println(MessageFormat.format(" ''{0}'' '{1}' {2} {3}", a, b,"",c));
}

2. 运行结果

 123 321  c
# '{1}'不转换
 'aaa' '{1}'  321 c

2 StrSubstitutor

1. 依赖包

        <dependency>
            <groupId>org.apache.commons</groupId>
            <artifactId>commons-lang3</artifactId>
            <version>3.7</version>
        </dependency>

2. code

public static void main(String[] args) {        
        Map map = new HashMap();
        map.put("code","123321");
        map.put("product","xxxaaa系统");
        String str1 = "您正在登录${product},验证码为：${code}，五分钟内有效，如非本人操作请忽略。";
        StrSubstitutor sb = new StrSubstitutor(map);
        String content = sb.replace(str1);
        System.out.println(content);
}

3. 输出

您正在登录xxxaaa系统,验证码为：123321，五分钟内有效，如非本人操作请忽略。

3. replace

public static void testReplace(String args[]) {
   String text = "hello {user}, welcome to {place}!";
   String user = "Lucy";
   String place = "China";

   String res = text.replace("{user}", user).replace("{place}", place);
   System.out.println(res);  // 输出   hello Lucy, welcome to China!
}