OkHttp协议
okhttp是一个第三方类库，用于android中请求网络
这是一个开源项目,是安卓端最火热的轻量级框架,由移动支付Square公司贡献(该公司还贡献了Picasso和LeakCanary)
文件下载用Get方式
OkHttpClient okHttpClient = new OkHttpClient.Builder().callTimeout(5, TimeUnit.SECONDS)
.readTimeout(5, TimeUnit.SECONDS)
.build();
Request request = new Request.Builder().url(u)
.get()
.build();
Call call = okHttpClient.newCall(request);
call.enqueue(new Callback() {
@Override
public void onFailure(Call call, IOException e) {
}
@Override
public void onResponse(Call call, Response response) throws IOException {
ResponseBody body = response.body();
long length = body.contentLength();
Message message = Message.obtain();
message.what = Model.DownLoad_Max;
message.obj = (int)length;
handler.sendMessage(message);
InputStream inputStream = body.byteStream();
FileOutputStream fileOutputStream = new FileOutputStream(path);
byte[] bytes = new byte[1024];
int len = 0;
int count = 0;
while ((len=inputStream.read(bytes))!=-1) {
count+=len;
fileOutputStream.write(bytes,0,len);
Message message1 = Message.obtain();
message1.what = Model.DownLoad_Progress;
message1.obj = count;
handler.sendMessage(message1);
}
}
});文件上传用Post方式
OkHttpClient okHttpClient = new OkHttpClient.Builder().readTimeout(5, TimeUnit.SECONDS)
.callTimeout(5, TimeUnit.SECONDS)
.build();
MultipartBody multipartBody = new MultipartBody.Builder().setType(MultipartBody.FORM)
.addFormDataPart("file",filename, RequestBody.create(MediaType.parse("image/jpg"),new File(path)))
.build();
Request request = new Request.Builder().url(u)
.post(multipartBody)
.build();
Call call = okHttpClient.newCall(request);
call.enqueue(new Callback() {
@Override
public void onFailure(Call call, IOException e) {
}
@Override
public void onResponse(Call call, Response response) throws IOException {
handler.sendEmptyMessage(Model.UpLoad_Finish);
}
});OkHttp协议封装
将OkHttp封装成工具类并写上传和下载方法，代码如下：
public static OkHttpClient okHttpClient;
private static OkHttpUtils okHttpUtils = new OkHttpUtils();
private OkHttpUtils(){}
public static OkHttpUtils getOkHttpUtils(){
okHttpClient = new OkHttpClient.Builder().callTimeout(5, TimeUnit.SECONDS)
.readTimeout(5,TimeUnit.SECONDS)
.build();
return okHttpUtils;
}
public void get(String url, final CallBack callBack){
Request request = new Request.Builder().get()
.url(url)
.build();
Call call = okHttpClient.newCall(request);
call.enqueue(new Callback() {
@Override
public void onFailure(Call call, IOException e) {
callBack.onError(e.getMessage());
}
@Override
public void onResponse(Call call, Response response) throws IOException {
callBack.onSuccess(response);
}
});
}
public void post(String url, HashMap<String,String> map, final CallBack callBack){
Set<Map.Entry<String, String>> entries = map.entrySet();
FormBody.Builder builder = new FormBody.Builder();
for (Map.Entry<String, String> entrie : entries) {
String key = entrie.getKey();
String value = entrie.getValue();
builder.add(key,value);
}
FormBody formBody = builder.build();
Request request = new Request.Builder().post(formBody)
.url(url)
.build();
Call call = okHttpClient.newCall(request);
call.enqueue(new Callback() {
@Override
public void onFailure(Call call, IOException e) {
callBack.onError(e.getMessage());
}
@Override
public void onResponse(Call call, Response response) throws IOException {
callBack.onSuccess(response);
}
});
}OkHttp拦截器
主要用于拦截发送信息
public static OkHttpClient okHttpClient;
private static OkHttpUtils okHttpUtils = new OkHttpUtils();
private OkHttpUtils(){}
public static OkHttpUtils getOkHttpUtils(){
okHttpClient = new OkHttpClient.Builder().callTimeout(5, TimeUnit.SECONDS)
.readTimeout(5,TimeUnit.SECONDS)
.addInterceptor(httpLoggingInterceptor)
.addInterceptor(interceptor)
.build();
return okHttpUtils;
}
static HttpLoggingInterceptor httpLoggingInterceptor = new HttpLoggingInterceptor(new HttpLoggingInterceptor.Logger() {
@Override
public void log(String message) {
Log.d("###",message);
}
});
static Interceptor interceptor = new Interceptor() {
@Override
public Response intercept(Chain chain) throws IOException {
Request request = chain.request().newBuilder().header("token", "token").build();
return chain.proceed(request);
}
};SpringBoot——集成Okhttp3
1.pom依赖：
<dependency>
<groupId>com.squareup.okhttp3</groupId>
<artifactId>okhttp</artifactId>
<version>3.10.0</version>
</dependency>2.okhttp工具类：
public class OkHttpUtils {
private static volatile OkHttpClient okHttpClient = null;
private static volatile Semaphore semaphore = null;
private Map<String, String> headerMap;
private Map<String, String> paramMap;
private String url;
private Request.Builder request;
/**
* 初始化okHttpClient，并且允许https访问
*/
private OkHttpUtils() {
if (okHttpClient == null) {
synchronized (OkHttpUtils.class) {
if (okHttpClient == null) {
TrustManager[] trustManagers = buildTrustManagers();
okHttpClient = new OkHttpClient.Builder()
.connectTimeout(15, TimeUnit.SECONDS)
.writeTimeout(20, TimeUnit.SECONDS)
.readTimeout(20, TimeUnit.SECONDS)
.sslSocketFactory(createSSLSocketFactory(trustManagers), (X509TrustManager) trustManagers[0])
.hostnameVerifier((hostName, session) -> true)
.retryOnConnectionFailure(true)
.build();
addHeader("User-Agent", "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3239.132 Safari/537.36");
}
}
}
}
/**
* 用于异步请求时，控制访问线程数，返回结果
*
* @return
*/
private static Semaphore getSemaphoreInstance() {
//只能1个线程同时访问
synchronized (OkHttpUtils.class) {
if (semaphore == null) {
semaphore = new Semaphore(0);
}
}
return semaphore;
}
/**
* 创建OkHttpUtils
*
* @return
*/
public static OkHttpUtils builder() {
return new OkHttpUtils();
}
/**
* 添加url
*
* @param url
* @return
*/
public OkHttpUtils url(String url) {
this.url = url;
return this;
}
/**
* 添加参数
*
* @param key 参数名
* @param value 参数值
* @return
*/
public OkHttpUtils addParam(String key, String value) {
if (paramMap == null) {
paramMap = new LinkedHashMap<>(16);
}
paramMap.put(key, value);
return this;
}
/**
* 添加请求头
*
* @param key 参数名
* @param value 参数值
* @return
*/
public OkHttpUtils addHeader(String key, String value) {
if (headerMap == null) {
headerMap = new LinkedHashMap<>(16);
}
headerMap.put(key, value);
return this;
}
/**
* 初始化get方法
*
* @return
*/
public OkHttpUtils get() {
request = new Request.Builder().get();
StringBuilder urlBuilder = new StringBuilder(url);
if (paramMap != null) {
urlBuilder.append("?");
try {
for (Map.Entry<String, String> entry : paramMap.entrySet()) {
urlBuilder.append(URLEncoder.encode(entry.getKey(), "utf-8")).
append("=").
append(URLEncoder.encode(entry.getValue(), "utf-8")).
append("&");
}
} catch (Exception e) {
e.printStackTrace();
}
urlBuilder.deleteCharAt(urlBuilder.length() - 1);
}
request.url(urlBuilder.toString());
return this;
}
/**
* 初始化post方法
*
* @param isJsonPost true等于json的方式提交数据，类似postman里post方法的raw
* false等于普通的表单提交
* @return
*/
public OkHttpUtils post(boolean isJsonPost) {
RequestBody requestBody;
if (isJsonPost) {
String json = "";
if (paramMap != null) {
json = JSON.toJSONString(paramMap);
}
requestBody = RequestBody.create(MediaType.parse("application/json; charset=utf-8"), json);
} else {
FormBody.Builder formBody = new FormBody.Builder();
if (paramMap != null) {
paramMap.forEach(formBody::add);
}
requestBody = formBody.build();
}
request = new Request.Builder().post(requestBody).url(url);
return this;
}
/**
* 同步请求
*
* @return
*/
public String sync() {
setHeader(request);
try {
Response response = okHttpClient.newCall(request.build()).execute();
assert response.body() != null;
return response.body().string();
} catch (IOException e) {
e.printStackTrace();
return "请求失败：" + e.getMessage();
}
}
/**
* 异步请求，有返回值
*/
public String async() {
StringBuilder buffer = new StringBuilder("");
setHeader(request);
okHttpClient.newCall(request.build()).enqueue(new Callback() {
@Override
public void onFailure(Call call, IOException e) {
buffer.append("请求出错：").append(e.getMessage());
}
@Override
public void onResponse(Call call, Response response) throws IOException {
assert response.body() != null;
buffer.append(response.body().string());
getSemaphoreInstance().release();
}
});
try {
getSemaphoreInstance().acquire();
} catch (InterruptedException e) {
e.printStackTrace();
}
return buffer.toString();
}
/**
* 异步请求，带有接口回调
*
* @param callBack
*/
public void async(ICallBack callBack) {
setHeader(request);
okHttpClient.newCall(request.build()).enqueue(new Callback() {
@Override
public void onFailure(Call call, IOException e) {
callBack.onFailure(call, e.getMessage());
}
@Override
public void onResponse(Call call, Response response) throws IOException {
assert response.body() != null;
callBack.onSuccessful(call, response.body().string());
}
});
}
/**
* 为request添加请求头
*
* @param request
*/
private void setHeader(Request.Builder request) {
if (headerMap != null) {
try {
for (Map.Entry<String, String> entry : headerMap.entrySet()) {
request.addHeader(entry.getKey(), entry.getValue());
}
} catch (Exception e) {
e.printStackTrace();
}
}
}
/**
* 生成安全套接字工厂，用于https请求的证书跳过
*
* @return
*/
private static SSLSocketFactory createSSLSocketFactory(TrustManager[] trustAllCerts) {
SSLSocketFactory ssfFactory = null;
try {
SSLContext sc = SSLContext.getInstance("SSL");
sc.init(null, trustAllCerts, new SecureRandom());
ssfFactory = sc.getSocketFactory();
} catch (Exception e) {
e.printStackTrace();
}
return ssfFactory;
}
private static TrustManager[] buildTrustManagers() {
return new TrustManager[]{
new X509TrustManager() {
@Override
public void checkClientTrusted(X509Certificate[] chain, String authType) {
}
@Override
public void checkServerTrusted(X509Certificate[] chain, String authType) {
}
@Override
public X509Certificate[] getAcceptedIssuers() {
return new X509Certificate[]{};
}
}
};
}
/**
* 自定义一个接口回调
*/
public interface ICallBack {
void onSuccessful(Call call, String data);
void onFailure(Call call, String errorMsg);
}
}3.测试
@SpringBootTest
class SpringBootOkhttp3ApplicationTests {
@Test
void contextLoads() {
// get请求，方法顺序按照这种方式，切记选择post/get一定要放在倒数第二，同步或者异步倒数第一，才会正确执行
OkHttpUtils.builder().url("请求地址，http/https都可以")
// 有参数的话添加参数，可多个
.addParam("参数名", "参数值")
.addParam("参数名", "参数值")
// 也可以添加多个
.addHeader("Content-Type", "application/json; charset=utf-8")
.get()
// 可选择是同步请求还是异步请求
//.async();
.sync();
System.out.println("----------------------------------");
// post请求，分为两种，一种是普通表单提交，一种是json提交
OkHttpUtils.builder().url("请求地址，http/https都可以")
// 有参数的话添加参数，可多个
.addParam("参数名", "参数值")
.addParam("参数名", "参数值")
// 也可以添加多个
.addHeader("Content-Type", "application/json; charset=utf-8")
// 如果是true的话，会类似于postman中post提交方式的raw，用json的方式提交，不是表单
// 如果是false的话传统的表单提交
.post(true)
.sync();
// 选择异步有两个方法，一个是带回调接口，一个是直接返回结果
OkHttpUtils.builder().url("")
.post(false)
.async();
OkHttpUtils.builder().url("").post(false).async(new OkHttpUtils.ICallBack() {
@Override
public void onSuccessful(Call call, String data) {
// 请求成功后的处理
}
@Override
public void onFailure(Call call, String errorMsg) {
// 请求失败后的处理
}
});
}
}
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