The LINE Messaging API SDK for Java makes it easy to develop bots using LINE Messaging API, and you can create a sample bot within minutes.

See the official API documentation for more information.

• English: https://developers.line.biz/en/docs/messaging-api/overview/
• Japanese: https://developers.line.biz/ja/docs/messaging-api/overview/

This library requires Java 8 or later.

We've uploaded this library to the Maven Central Repository. You can install the modules using Maven or Gradle.

http://search.maven.org/#search%7Cga%7C1%7Cg%3A%22com.linecorp.bot%22

This project contains the following modules:

• line-bot-api-client: API client library for the Messaging API
• line-bot-model: Model classes for the Messaging API
• line-bot-servlet: Java servlet utilities for bot servers
• line-bot-spring-boot: Spring Boot auto configuration library for bot servers

This project contains the following sample projects:

• sample-spring-boot-echo: A simple echo server.
• sample-spring-boot-kitchensink: Full featured sample code.

The line-bot-spring-boot module lets you build a bot application as a Spring Boot application.

/*
 * Copyright 2016 LINE Corporation
 *
 * LINE Corporation licenses this file to you 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:
 *
 *   http://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 com.example.bot.spring.echo;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

import com.linecorp.bot.model.event.Event;
import com.linecorp.bot.model.event.MessageEvent;
import com.linecorp.bot.model.event.message.TextMessageContent;
import com.linecorp.bot.model.message.TextMessage;
import com.linecorp.bot.spring.boot.annotation.EventMapping;
import com.linecorp.bot.spring.boot.annotation.LineMessageHandler;

@SpringBootApplication
@LineMessageHandler
public class EchoApplication {
    public static void main(String[] args) {
        SpringApplication.run(EchoApplication.class, args);
    }

    @EventMapping
    public TextMessage handleTextMessageEvent(MessageEvent<TextMessageContent> event) {
        System.out.println("event: " + event);
        return new TextMessage(event.getMessage().getText());
    }

    @EventMapping
    public void handleDefaultMessageEvent(Event event) {
        System.out.println("event: " + event);
    }
}

You can use LineMessagingServiceBuilder to configure a proxy server. It accepts your own OkHttpBuilder instance.

Note: You don't need to use an add-on like Fixie to have static IP addresses for proxy servers. You can make API calls without entering IP addresses on the server IP whitelist.

FAQ: https://developers.line.biz/en/faq/

Community Q&A: https://www.line-community.me/questions

News: https://developers.line.biz/en/news/

Twitter: @LINE_DEV

This project respects semantic versioning.

See http://semver.org/.

This library provides the Spring Boot binding. And there are some incompatible changes between Spring Boot 2.x and 3.x. As a result, line-bot-sdk-java maintainers maintain two maintenance lines until the end of the life of Spring Boot 2.x.

• line-bot-sdk-java 6.x supports Spring Boot 3.x and Jakarta EE, Java 17+(Branch: master).
• line-bot-sdk-java 5.x supports Spring Boot 2.x and Java EE, Java 8+(branch: maint/5.x).

Spring Boot 2.x is scheduled for retirement on 2023/11/18. This means that line-bot-sdk-java 5.x will be retired on 2023/11/18. https://endoflife.date/spring-boot

We will add new features to line-bot-sdk-java 6.x. But if you send us a backport patch for maint/5.x branch, we might apply it :)

Please check CONTRIBUTING before making a contribution.

Copyright (C) 2016 LINE Corp.

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

   http://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.