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OkHttp3使用教程,实现get、post请求发送,自动重试,打印响应日志。

弘文馆校书 2019-09-21 10:14:00 阅读数:68 评论数:0 点赞数:0 收藏数:0

一、创建线程安全的okhttp单例


import service.NetworkIntercepter;
import service.RetryIntercepter;
import okhttp3.*;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.TimeUnit;

public class HttpUtils {
private static final Logger LOGGER = LoggerFactory.getLogger(HttpUtils.class);
private static final int CONNECTION_TIME_OUT = 2000;//连接超时时间
private static final int SOCKET_TIME_OUT = 2000;//读写超时时间
private static final int MAX_IDLE_CONNECTIONS = 30;// 空闲连接数
private static final long KEEP_ALLIVE_TIME = 60000L;//保持连接时间

private OkHttpClient okHttpClient;
private volatile static HttpUtils httpUtils;

public static HttpUtils getInstance(){
if(httpUtils == null){
synchronized (HttpUtils.class){
if(httpUtils == null){
httpUtils = new HttpUtils();
}
}
}
return httpUtils;

}
public HttpUtils(){
ConnectionPool connectionPool = new ConnectionPool(MAX_IDLE_CONNECTIONS,KEEP_ALLIVE_TIME,TimeUnit.MILLISECONDS);
this.okHttpClient = new OkHttpClient()
.newBuilder()
.readTimeout(SOCKET_TIME_OUT, TimeUnit.MILLISECONDS)
.writeTimeout(SOCKET_TIME_OUT, TimeUnit.MILLISECONDS)
.connectionPool(connectionPool)
.retryOnConnectionFailure(false) //自动重连设置为false
.connectTimeout(CONNECTION_TIME_OUT,TimeUnit.MILLISECONDS)
.addInterceptor(new RetryIntercepter(2)) //重试拦截器2次
.addNetworkInterceptor(new NetworkIntercepter()) //网络拦截器,统一打印日志
.build();
}
}
 

 

重试拦截器:

 import okhttp3.Interceptor;
 import okhttp3.Request;
 import okhttp3.Response;

import java.io.IOException;

public class RetryIntercepter implements Interceptor{
 public int maxRetryCount;
 private int count = 0;
 public RetryIntercepter(int maxRetryCount) {
 this.maxRetryCount = maxRetryCount;
  }

 @Override
 public Response intercept(Chain chain) throws IOException {

return retry(chain);
  }

public Response retry(Chain chain){
 Response response = null;
 Request request = chain.request();
 try {
 response = chain.proceed(request);
 while (!response.isSuccessful() && count < maxRetryCount) {
 count++;
 response = retry(chain);
  }
  }
 catch (Exception e){
 while (count < maxRetryCount){
 count++;
 response = retry(chain);
  }
  }
 return response;
  }
 }

注意:两处while是因为如果请求中出现异常,也能进行重试,比如超时,后面会有例子。

 

网络拦截器,打印请求、响应时间、响应状态码,响应内容

 import okhttp3.*;
 import okio.Buffer;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;

import java.io.IOException;
 import java.nio.charset.Charset;

public class NetworkIntercepter implements Interceptor{
 private static Logger LOGGER = LoggerFactory.getLogger(NetworkIntercepter.class);
  @Override
 public Response intercept(Interceptor.Chain chain) {
 long start = System.currentTimeMillis();
 Response response=null;
 String responseBody = null;
 String responseCode = null;
 String url = null;
 String requestBody = null;
 try {
 Request request = chain.request();
 url = request.url().toString();
 requestBody = getRequestBody(request);
 response = chain.proceed(request);
 responseBody = response.body().string();
 responseCode = String.valueOf(response.code());
 MediaType mediaType = response.body().contentType();
 response = response.newBuilder().body(ResponseBody.create(mediaType,responseBody)).build();
  }
 catch (Exception e){
  LOGGER.error(e.getMessage());
  }
 finally {
 long end = System.currentTimeMillis();
 String duration = String.valueOf(end - start);
 LOGGER.info("responseTime= {}, requestUrl= {}, params={}, responseCode= {}, result= {}",
  duration, url,requestBody,responseCode,responseBody);
  }

return response;
  }

private String getRequestBody(Request request) {
 String requestContent = "";
 if (request == null) {
 return requestContent;
  }
 RequestBody requestBody = request.body();
 if (requestBody == null) {
 return requestContent;
  }
 try {
 Buffer buffer = new Buffer();
  requestBody.writeTo(buffer);
 Charset charset = Charset.forName("utf-8");
 requestContent = buffer.readString(charset);
 } catch (IOException e) {
  e.printStackTrace();
  }
 return requestContent;
  }
 }

 

 

二、GET请求

1、带参数的get请求

 /*
 * 发送待url参数的get
 */
public String get(String url,Map<String,String> pathParams){
 HttpUrl.Builder builder = HttpUrl.parse(url).newBuilder();
 for(String key:pathParams.keySet()){
  builder.addQueryParameter(key,pathParams.get(key) );
  }
 Request request = new Request.Builder()
  .url(builder.build().toString())
  .build();
 return execute(request);
  }

private String execute(Request request){
 String responseBody=null;
 try {
 Response response = okHttpClient.newCall(request).execute();
 responseBody = response.body().string();
 } catch (IOException |NullPointerException e) {
  e.printStackTrace();
  }
 return responseBody;
 }

测试:

String url = "http://localhost:8080/test/12346/query";
Map<String,String> params = new HashMap<>();
params.put("aaa","111");
params.put("bbb","222");
HttpUtils httpUtils = HttpUtils.getInstance();
httpUtils.get(url,params);

打印日志如下:
[main][2019-09-21 10:19:02.072] [INFO] [NetworkIntercepter.intercept:40] responseTime= 62, requestUrl= http://localhost:8080/test/12346/query?aaa=111&bbb=222, params=, responseCode= 200, result= {"result_code":"success","data":{"aaa":"111"},"path":"/test/12346/query"}

 2、不带参数的get请求

测试:

String url = "http://localhost:8080/test/12346/query?ccc=1&ddd=2";
HttpUtils httpUtils = HttpUtils.getInstance();
httpUtils.get(url);

打印日志如下:
[main][2019-09-21 10:25:46.943] [INFO] [NetworkIntercepter.intercept:38] responseTime= 11, requestUrl= http://localhost:8080/test/12346/query?ccc=1&ddd=2, params=, responseCode= 200, result= {"result_code":"success","data":{"aaa":"111"},"path":"/test/12346/query"}


三、POST请求

1、post发送带url参数的json

 /*
 * post发送带url参数的json
 */
public String post(String url, Map<String,String> pathParams, String body){
 RequestBody requestBody = RequestBody.
 create(MediaType.parse("application/json;charset=utf-8"), body);
 HttpUrl.Builder builder = HttpUrl.parse(url).newBuilder();
 for(String key:pathParams.keySet()){
  builder.addQueryParameter(key,pathParams.get(key) );
  }
 Request request = new Request.Builder()
  .post(requestBody)
  .url(builder.build().toString())
  .build();
 return execute(request);
 }

测试:

Gson gson = new Gson();
String url = "http://localhost:8080/test/12346/query";
Map<String,String> params = new HashMap<>();
params.put("aaa","111");
params.put("bbb","222");

Map<String,Object> bodyMap = new HashMap<>();
bodyMap.put("name","zhangsan");
bodyMap.put("age",15);
HttpUtils httpUtils = HttpUtils.getInstance();
httpUtils.post(url,params,gson.toJson(bodyMap));

打印日志
[main][2019-09-21 10:37:04.577] [INFO] [NetworkIntercepter.intercept:38] responseTime= 304, requestUrl= http://localhost:8080/test/12346/query?aaa=111&bbb=222, params={"name":"zhangsan","age":15}, responseCode= 200, result= {"result_code":"success","data":{"aaa":"111"},"path":"/test/12346/query"}

2、post发送json

 /*
 * post发送json
 */
public String post(String url,String body){
 Map<String,String> pathParams = new HashMap<>();
 return post(url,pathParams ,body );
 }

 

测试:

Gson gson = new Gson();
String url = "http://localhost:8080/test/12346/query";
Map<String,Object> bodyMap = new HashMap<>();
bodyMap.put("name","zhangsan");
bodyMap.put("age",15);
HttpUtils httpUtils = HttpUtils.getInstance();
httpUtils.post(url,gson.toJson(bodyMap));

打印日志:

[main][2019-09-21 10:44:00.835] [INFO] [NetworkIntercepter.intercept:38] responseTime= 17, requestUrl= http://localhost:8080/test/12346/query, params={"name":"zhangsan","age":15}, responseCode= 200, result= {"result_code":"success","data":{"aaa":"111"},"path":"/test/12346/query"}

 

3、post发送表单

 /*
 * post发送表单
 */
public String post(String url, Map<String,String> pathParams){
 FormBody.Builder formBodyBuilder = new FormBody.Builder();
 HttpUrl.Builder builder = HttpUrl.parse(url).newBuilder();
 for(String key:pathParams.keySet()){
  formBodyBuilder.add(key,pathParams.get(key) );
  }
 RequestBody requestBody = formBodyBuilder.build();
 Request request = new Request.Builder()
  .post(requestBody)
  .url(builder.build().toString())
  .build();
 return execute(request);
 }

 

测试:

String url = "http://localhost:8080/test/12346/query";
Map<String,String> params = new HashMap<>();
params.put("aaa","111");
params.put("bbb","222");
HttpUtils httpUtils = HttpUtils.getInstance();
httpUtils.post(url,params);

打印日志:
[main][2019-09-21 10:49:54.136] [INFO] [NetworkIntercepter.intercept:38] responseTime= 21, requestUrl= http://localhost:8080/test/12346/query, params=aaa=111&bbb=222, responseCode= 200, result= {"result_code":"success","data":{"aaa":"111"},"path":"/test/12346/query"}

 四、网络拦截器

1、404重试

测试:

String url = "http://localhost:8080/test/12346/query2";
Map<String,String> params = new HashMap<>();
params.put("aaa","111");
params.put("bbb","222");
HttpUtils httpUtils = HttpUtils.getInstance();
httpUtils.post(url,params);

日志打印:

[main][2019-09-21 10:56:20.495] [INFO] [NetworkIntercepter.intercept:38] responseTime= 26, requestUrl= http://localhost:8080/test/12346/query2, params=aaa=111&bbb=222, responseCode= 404, result= {"timestamp":1569034580,"status":404,"error":"Not Found","message":"Not Found","path":"/test/12346/query2"}
[main][2019-09-21 10:56:20.506] [INFO] [NetworkIntercepter.intercept:38] responseTime= 4, requestUrl= http://localhost:8080/test/12346/query2, params=aaa=111&bbb=222, responseCode= 404, result= {"timestamp":1569034580,"status":404,"error":"Not Found","message":"Not Found","path":"/test/12346/query2"}
[main][2019-09-21 10:56:20.512] [INFO] [NetworkIntercepter.intercept:38] responseTime= 4, requestUrl= http://localhost:8080/test/12346/query2, params=aaa=111&bbb=222, responseCode= 404, result= {"timestamp":1569034580,"status":404,"error":"Not Found","message":"Not Found","path":"/test/12346/query2"


重试了2次,共请求3次

2、超时重试

日志打印:

[main][2019-09-21 10:59:30.086] [ERROR] [NetworkIntercepter.intercept:33] timeout
[main][2019-09-21 10:59:30.092] [INFO] [NetworkIntercepter.intercept:38] responseTime= 2009, requestUrl= http://localhost:8080/test/12346/query, params=aaa=111&bbb=222, responseCode= null, result= null
[main][2019-09-21 10:59:32.097] [ERROR] [NetworkIntercepter.intercept:33] timeout
[main][2019-09-21 10:59:32.097] [INFO] [NetworkIntercepter.intercept:38] responseTime= 2004, requestUrl= http://localhost:8080/test/12346/query, params=aaa=111&bbb=222, responseCode= null, result= null
[main][2019-09-21 10:59:34.101] [ERROR] [NetworkIntercepter.intercept:33] timeout
[main][2019-09-21 10:59:34.101] [INFO] [NetworkIntercepter.intercept:38] responseTime= 2002, requestUrl= http://localhost:8080/test/12346/query, params=aaa=111&bbb=222, responseCode= null, result= null




版权声明
本文为[弘文馆校书]所创,转载请带上原文链接,感谢
https://www.cnblogs.com/Eric-zhao/p/11561578.html