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userpu
2025-12-17 19:47:14 +08:00
commit 0d15e20780
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42
langchain4j-ai-low-high-api/pom.xml Normal file
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<?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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>com.iwe3</groupId>
<artifactId>langchain4j-ai-java</artifactId>
<version>1.0-SNAPSHOT</version>
</parent>
<artifactId>langchain4j-ai-low-high-api</artifactId>
<properties>
<maven.compiler.source>17</maven.compiler.source>
<maven.compiler.target>17</maven.compiler.target>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>
<dependencies>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<!--导入低阶依赖-->
<dependency>
<groupId>dev.langchain4j</groupId>
<artifactId>langchain4j-open-ai-spring-boot-starter</artifactId>
<version>1.9.1-beta17</version>
</dependency>
<!--导入高阶依赖-->
<dependency>
<groupId>dev.langchain4j</groupId>
<artifactId>langchain4j-spring-boot-starter</artifactId>
<version>1.9.1-beta17</version>
</dependency>
</dependencies>
</project>

12
langchain4j-ai-low-high-api/src/main/java/com/iwe3/langchain4j/LowHighApplication.java Normal file
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package com.iwe3.langchain4j;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class LowHighApplication {
public static void main(String[] args) {
SpringApplication.run(LowHighApplication.class,args);
}
}

37
langchain4j-ai-low-high-api/src/main/java/com/iwe3/langchain4j/config/LLMConfig.java Normal file
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package com.iwe3.langchain4j.config;
import dev.langchain4j.model.chat.ChatModel;
import dev.langchain4j.model.openai.OpenAiChatModel;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
@Configuration
public class LLMConfig {
@Bean(name = "qwen")
public ChatModel chatModelQwen(){
/*大模型3件套：apikey ,model-name,base-url */
return OpenAiChatModel.builder()
.apiKey(System.getenv("DASH_SCOPE_API_KEY"))
.modelName("qwen-plus")
.baseUrl("https://dashscope.aliyuncs.com/compatible-mode/v1")
.build();
}
/**
* @Description:
* 知识出处，https://api-docs.deepseek.com/zh-cn/
*/
@Bean(name = "deepseek")
public ChatModel chatModelDeepSeek()
{
return
OpenAiChatModel.builder()
.apiKey(System.getenv("DEEP_SEEK_API_KEY"))
.modelName("deepseek-chat")
//.modelName("deepseek-reasoner")
.baseUrl("https://api.deepseek.com/v1")
.build();
}
}

21
langchain4j-ai-low-high-api/src/main/java/com/iwe3/langchain4j/controller/HighLevelController.java Normal file
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package com.iwe3.langchain4j.controller;
import com.iwe3.langchain4j.service.ChatAssistant;
import jakarta.annotation.Resource;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;
@RestController
public class HighLevelController {
@Resource
private ChatAssistant chatAssistant;
// http://localhost:9003/lc4j/boot/declarative?prompt=我是谁
@GetMapping(value = "/lc4j/boot/declarative")
public String declarative(@RequestParam(value = "prompt", defaultValue = "你是谁") String prompt)
{
return chatAssistant.chat(prompt);
}
}

41
langchain4j-ai-low-high-api/src/main/java/com/iwe3/langchain4j/controller/LowLevelController.java Normal file
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package com.iwe3.langchain4j.controller;
import dev.langchain4j.data.message.UserMessage;
import dev.langchain4j.model.chat.ChatModel;
import dev.langchain4j.model.chat.response.ChatResponse;
import dev.langchain4j.model.output.TokenUsage;
import jakarta.annotation.Resource;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;
@RestController
public class LowLevelController {
@Resource(name = "qwen")
private ChatModel chatModel;
// http://localhost:9003/lc4j/lowapi/api01?prompt=我是谁
@GetMapping(value = "/lc4j/lowapi/api01")
public String api01(@RequestParam(value = "prompt", defaultValue = "你是谁") String prompt)
{
return chatModel.chat(prompt);
}
// http://localhost:9003/lc4j/lowapi/api02?prompt=我是谁
@GetMapping(value = "/lc4j/lowapi/api02")
public String api02(@RequestParam(value = "prompt", defaultValue = "你是谁") String prompt)
{
ChatResponse chatResponse = chatModel.chat(UserMessage.from(prompt));
String result = chatResponse.aiMessage().text();
System.out.println("通过调用大模型返回结果："+result);
// Token 用量计算的底层api
TokenUsage tokenUsage = chatResponse.tokenUsage();
System.out.println("本次调用消耗的token："+tokenUsage);
result = result +"\t\n"+tokenUsage;
return result;
}
}

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langchain4j-ai-low-high-api/src/main/java/com/iwe3/langchain4j/service/ChatAssistant.java Normal file
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package com.iwe3.langchain4j.service;
import dev.langchain4j.service.spring.AiService;
import dev.langchain4j.service.spring.AiServiceWiringMode;
/**
* 知识出处:
* https://docs.langchain4j.dev/tutorials/spring-boot-integration/#spring-boot-starter-for-declarative-ai-services
*/
@AiService(wiringMode = AiServiceWiringMode.EXPLICIT
,chatModel = "qwen")
public interface ChatAssistant {
String chat(String prompt);
}

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langchain4j-ai-low-high-api/src/main/resources/application.yml Normal file
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server:
port: 9003
spring:
application:
name: langchain4j-ai-low-level