记录一下okhttp的使用

1. 自定义工具类 （GET，POST请求）

<dependency>
    <groupId>com.squareup.okhttp3</groupId>
    <artifactId>okhttp</artifactId>
    <version>3.4.1</version>
</dependency>

/**
 * httpUtil工具类
 */
@Slf4j
public class HttpUtil {
    
    
	// 公共的OkHttpClient 对象
    public static final OkHttpClient client = new OkHttpClient.Builder()
        .connectTimeout(10, TimeUnit.SECONDS)
        .readTimeout(10, TimeUnit.SECONDS)
        .build();

    /**
     * get 
     * @param url
     */
    public static ResponseBody sendOkHttpGet(String url){
    
    
        ResponseBody responseBody = null;
        try {
    
    
            Request request = new Request.Builder().url(url).get().build();
            responseBody = client.newCall(request).execute().body();
        } catch (IOException e) {
    
    
            log.error("[send request error]", e);
        }
        return responseBody;
    }

    /**
     * post
     * @param url
     * @param body	请求参数
     * @return
     */
    public static ResponseBody sendOkHttpPost(String url, RequestBody body){
    
    
        ResponseBody responseBody = null;
        try {
    
    
            Request request = new Request.Builder().url(url).post(body).build();
            responseBody = client.newCall(request).execute().body();
        } catch (IOException e) {
    
    
            log.error("[send request error]", e);
        }
        return responseBody;
    }
}

2. POST请求传参

okhttp的post请求可以传递参数，使用FormBody构建

 //把请求参数封装到RequestBody里面
 FormBody.BuilderformBuilder = new FormBody.Builder();
 formBuilder.add("username","admin");
 formBuilder.add("password","admin");
 RequestBody requestBody = formBuilder.build();
 HttpUtil.sendOkHttpPost("请求url", requestBody);

3. ResponseBody

    public static void responseBody(String url, String path){
    
    
        try {
    
    
            Request request = new Request.Builder().url(url).get().build();
            // 请求返回ResponseBody 对象
            ResponseBody body = client.newCall(request).execute().body();
            // 返回字节
            byte[] bytes = body.bytes();
            // 返回字符串
            String string = body.string();
           	// 返回输入流
            InputStream inputStream = body.byteStream();
        }catch (Exception e){
    
    
            log.error("[error: {}]", e.getMessage());
        }
    }