langchain4j整合springboot

1.搭建项目架子

配置文件

参考官网配置引入

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>3.5.0</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>

    <groupId>com.yd</groupId>
    <artifactId>langchain4j_springboot</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>langchain4j_springboot</name>
    <description>langchain4j_springboot</description>

    <properties>
        <java.version>17</java.version>
<!--        -->
        <langchain4j.version>1.0.0-beta1</langchain4j.version>
    </properties>
    <dependencies>
<!--        -->
        <dependency>
            <groupId>dev.langchain4j</groupId>
            <artifactId>langchain4j-community-dashscope-spring-boot-starter</artifactId>
            <version>${langchain4j.version}</version>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>


    </dependencies>
<!--    -->
    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>dev.langchain4j</groupId>
                <artifactId>langchain4j-community-bom</artifactId>
                <version>${langchain4j.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>


    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

server:
  port: 9090


langchain4j:
  community:
    dashscope:
      chat-model:
        api-key: xxx
        model: qwen-max

Controller测试

package com.yd.langchain4j_springboot;

import dev.langchain4j.community.model.dashscope.QwenChatModel;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;

@RestController
@RequestMapping("ai")
public class ChatController {
    @Autowired
    QwenChatModel qwenChatModel;
    @RequestMapping("/chat")
    public String test(@RequestParam(defaultValue="你是谁") String message){
        String chat=qwenChatModel.chat(message);
        return chat;
    }
    @RequestMapping("/a")
    public String test2(){
        String chat="a";
        return chat;
    }
}

测试结果

补充：

• 阿里云api注册以及使用：官网
• 两个报错
  网页漏看路径：Whitelabel Error Page This application has no explicit mapping for /error, so you are seeing this as a fallback. Mon Jun 16 23:09:14 CST 2025 There was an unexpected error (type=Not Found, status=404).
  环境配置版本问题
• Consider defining a bean of type 'dev.langchain4j.community.model.dashscope.QwenChatModel
• dev.langchain4j:langchain4j-community-dashscope-spring-boot-starter:jar:unknown was not found in https://maven.aliyun.com/nexus/content/groups/public/ during a previous attempt. This failure was cached in the local repository and resolution is not reattempted until the update interval of alimaven has elapsed or updates are forced