代码语言：javascript复制青春如初春，如朝日，如百卉之萌动，如利刃之新发于硎，人生最宝贵之时期也。青年之于社会，犹新鲜活泼细胞之在身。——陈独秀 分享一下：
org.springframework.boot.convert.Delimiter的用法
/*
* Copyright 2012-2019 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.springframework.boot.convert;
import java.lang.annotation.Documented;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
/**
* Declares a field or method parameter should be converted to collection using the
* specified delimiter.
*
* @author Phillip Webb
* @since 2.0.0
*/
@Documented
@Retention(RetentionPolicy.RUNTIME)
@Target({ ElementType.METHOD, ElementType.FIELD, ElementType.PARAMETER, ElementType.ANNOTATION_TYPE })
public @interface Delimiter {
/**
* A delimiter value used to indicate that no delimiter is required and the result
* should be a single element containing the entire string.
*/
String NONE = "";
/**
* The delimiter to use or {@code NONE} if the entire contents should be treated as a
* single element.
* @return the delimiter
*/
String value();
}配置文件：application.properties
server.port=8172
app.items=item1;item2;item3使用：
代码语言：javascript复制package com.ruben.simpleweb;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.ApplicationArguments;
import org.springframework.boot.ApplicationRunner;
import org.springframework.boot.convert.Delimiter;
import org.springframework.stereotype.Component;
import java.util.List;
@Component
public class Startup implements ApplicationRunner {
@Value("${app.items}")
@Delimiter(";")
private List<String> items;
@Override
public void run(ApplicationArguments args) throws Exception {
items.forEach(System.out::println);
}
}可以看到，我们的items的值，使用了我们自定义的分隔符
当然除了用@Value，用新建properties类的方式也可以
