Retrofit 简单使用方法

原创已于 2022-09-19 16:11:24 修改 · 248 阅读

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#retrofit #android #java

于 2022-09-19 15:57:31 首次发布

本文介绍如何在项目中集成Retrofit与OkHttp，包括添加Maven依赖、配置Retrofit客户端、创建请求接口及调用示例。通过具体代码演示了如何实现HTTP请求的发送与响应处理。

先要添加pom依赖

        <dependency>
            <groupId>com.squareup.retrofit2</groupId>
            <artifactId>retrofit</artifactId>
            <version>2.9.0</version>
        </dependency>
        <dependency>
            <groupId>com.squareup.retrofit2</groupId>
            <artifactId>converter-jackson</artifactId>
            <version>2.9.0</version>
        </dependency>
        <dependency>
            <groupId>com.squareup.retrofit2</groupId>
            <artifactId>converter-scalars</artifactId>
            <version>2.9.0</version>
        </dependency>
        <dependency>
            <groupId>com.squareup.okhttp3</groupId>
            <artifactId>logging-interceptor</artifactId>
            <version>3.14.9</version>
        </dependency>
        <dependency>
            <groupId>com.squareup.okhttp3</groupId>
            <artifactId>okhttp</artifactId>
            <version>3.14.9</version>
        </dependency>

添加RetrofitConfig

@Configuration
@Slf4j
public class RetrofitConfig {

    @Value("${retrofit.backendUrl:}")
    private String backendUrl  ;

    @Bean
    public BackendClient backendClient() {
        return this.build(backendUrl, BackendClient.class);
    }

    ;

    private OkHttpClient retrofitOkHttpClient;

    private <T> T build(String baseUrl, Class<T> type) {
        OkHttpClient client = getRetrofitOkHttpClient();
        Retrofit retrofit = new Retrofit.Builder()
                .baseUrl(baseUrl)
                .addConverterFactory(ScalarsConverterFactory.create())
                .addConverterFactory(JacksonConverterFactory.create((new ObjectMapper())
                        .registerModule((Module) new ParameterNamesModule())
                        .registerModule((Module) new Jdk8Module())
                        .registerModule((Module) new JavaTimeModule())))
                .client(client)
                .build();
        return retrofit.create(type);
    }

    private synchronized OkHttpClient getRetrofitOkHttpClient() {
        if (retrofitOkHttpClient == null) {
            HttpLoggingInterceptor logging = new HttpLoggingInterceptor(log::info);
            logging.setLevel(HttpLoggingInterceptor.Level.BODY);
            retrofitOkHttpClient = new OkHttpClient.Builder()
                    .addInterceptor(logging)
                    .connectTimeout(180, TimeUnit.SECONDS)
                    .readTimeout(180, TimeUnit.SECONDS)
                    .build();
        }
        return retrofitOkHttpClient;
    }
}

编写请求类

public interface BackendClient {
    
    @GET("/queryForThird")
    Call<JSONObject> queryForThird();

}

调用时直接注入BackendClient即可直接使用，如下：

backendClient.queryForThird().execute().body();

Retrofit 简单使用方法

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