博客 - 一个简单的java调用DeepSeek示例

1、添加pom依赖

<dependency>
    <groupId>com.alibaba</groupId>
    <artifactId>fastjson</artifactId>
    <version>1.2.83</version>
</dependency>
<dependency>
    <groupId>com.squareup.okhttp3</groupId>
    <artifactId>okhttp</artifactId>
    <version>3.14.9</version>
</dependency>

import java.io.IOException;
import java.util.concurrent.TimeUnit;
import com.alibaba.fastjson.JSONObject;
import okhttp3.MediaType;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.RequestBody;
import okhttp3.Response;
import okhttp3.ResponseBody;
/**
 * 
 * @author wst 2025年3月5日 上午11:28:15
 *
 */
public class DeepSeekApp {
    private static final String API_URL = "https://api.deepseek.com/chat/completions";
    private static final String API_KEY = "key **************";
    public static void main(String[] args) throws IOException {
        // 报文体
        DeepSeekChatBody deepSeekChatBody = new DeepSeekChatBody();
        DeepSeekMessage message = new DeepSeekMessage();
        message.setContent("你是谁");
        DeepSeekMessage[] messages = new DeepSeekMessage[] { message };
        deepSeekChatBody.setMessages(messages);
        String requestBody = JSONObject.toJSONString(deepSeekChatBody);
        System.out.println("报文:" + requestBody);
        // 请求
        OkHttpClient client = new OkHttpClient()
                .newBuilder() // -
                .connectTimeout(60, TimeUnit.SECONDS) // -
                .readTimeout(120, TimeUnit.SECONDS) // -
                .writeTimeout(120, TimeUnit.SECONDS) // -
                .build();
        MediaType mediaType = MediaType.parse("application/json");
        RequestBody reqBody = RequestBody.create(mediaType, requestBody);
        Request request = new Request.Builder()
                .url(API_URL).method("POST", reqBody) // -
                .addHeader("Content-Type", "application/json") // -
                .addHeader("Accept", "application/json") // 
                .addHeader("Authorization", "Bearer " + API_KEY).build();
        Response response = client.newCall(request).execute();
        System.out.println(response.code());
        System.out.println(response.message());
        ResponseBody respBody = response.body();
        // 解析
        String bodyStr = respBody.string();
        System.out.println("响应:" + bodyStr);
        JSONObject jobj = JSONObject.parseObject(bodyStr);
        Object[] choices = jobj.getObject("choices", Object[].class);
        String content = JSONObject.parseObject(choices[0].toString()) // -
                .getJSONObject("message").getString("content");
        System.out.println("回答:" + content);
    }
}

import java.util.HashMap;
import java.util.Map;
/**
 * 
 * @author wst 2025年3月5日 上午11:28:11
 *
 */
public class DeepSeekChatBody {
    private String model = "deepseek-chat";
    private int frequency_penalty = 0;
    private int max_tokens = 2048;
    private int presence_penalty = 0;
    private Map<String, String> response_format = new HashMap<String, String>();
    private Object stop = null;
    private boolean stream = false;
    private Object stream_options = null;
    private int temperature = 1;
    private int top_p = 1;
    private Object tools = null;
    private String tool_choice = "none";
    private boolean logprobs = false;
    private Object top_logprobs = null;
    /**
     * 发送的消息数组
     */
    private DeepSeekMessage[] messages;
    public DeepSeekChatBody() {
        super();
        response_format.put("type", "text");
    }
    public String getModel() {
        return model;
    }
    public void setModel(String model) {
        this.model = model;
    }
    public DeepSeekMessage[] getMessages() {
        return messages;
    }
    public void setMessages(DeepSeekMessage[] messages) {
        this.messages = messages;
    }
    public int getFrequency_penalty() {
        return frequency_penalty;
    }
    public void setFrequency_penalty(int frequency_penalty) {
        this.frequency_penalty = frequency_penalty;
    }
    public int getMax_tokens() {
        return max_tokens;
    }
    public void setMax_tokens(int max_tokens) {
        this.max_tokens = max_tokens;
    }
    public int getPresence_penalty() {
        return presence_penalty;
    }
    public void setPresence_penalty(int presence_penalty) {
        this.presence_penalty = presence_penalty;
    }
    public Map<String, String> getResponse_format() {
        return response_format;
    }
    public void setResponse_format(Map<String, String> response_format) {
        this.response_format = response_format;
    }
    public Object getStop() {
        return stop;
    }
    public void setStop(Object stop) {
        this.stop = stop;
    }
    public boolean isStream() {
        return stream;
    }
    public void setStream(boolean stream) {
        this.stream = stream;
    }
    public Object getStream_options() {
        return stream_options;
    }
    public void setStream_options(Object stream_options) {
        this.stream_options = stream_options;
    }
    public int getTemperature() {
        return temperature;
    }
    public void setTemperature(int temperature) {
        this.temperature = temperature;
    }
    public int getTop_p() {
        return top_p;
    }
    public void setTop_p(int top_p) {
        this.top_p = top_p;
    }
    public Object getTools() {
        return tools;
    }
    public void setTools(Object tools) {
        this.tools = tools;
    }
    public String getTool_choice() {
        return tool_choice;
    }
    public void setTool_choice(String tool_choice) {
        this.tool_choice = tool_choice;
    }
    public boolean isLogprobs() {
        return logprobs;
    }
    public void setLogprobs(boolean logprobs) {
        this.logprobs = logprobs;
    }
    public Object getTop_logprobs() {
        return top_logprobs;
    }
    public void setTop_logprobs(Object top_logprobs) {
        this.top_logprobs = top_logprobs;
    }
}

/**
 * 
 * @author wst 2025年3月5日 上午11:29:15
 *
 */
public class DeepSeekMessage {
    private String role = "system";
    private String content;
    public String getRole() {
        return role;
    }
    public void setRole(String role) {
        this.role = role;
    }
    public String getContent() {
        return content;
    }
    public void setContent(String content) {
        this.content = content;
    }
}