1.添加依赖：
implementation("com.squareup.okhttp3:okhttp:4.9.0")
2.配置请求：
- 2.1 GET请求：
- GET 同步请求：
//同步请求，请求时没回应，会阻塞
public void getSync(View view) {
OkHttpClient okHttpClient = new OkHttpClient();
//网络请求必须在子线程执行
new Thread(){
@Override
public void run() {
//Request代表请求对象，会将域名，请求地址，参数封装
//若是要在get后面直接加参数格式是在get后面加：?a=1&b=2
Request request = new Request.Builder().url("https://www.httpbin.org/get?a=1&b=2").build();
//准备好请求的Call对象
Call call = okHttpClient.newCall(request);
try {
Response response = call.execute();
Log.i(TAG, "getSync: "+response.body().string());
} catch (IOException e) {
e.printStackTrace();
}
}
}.start();
}
- GET异步请求：
public void getAsync(View view) {
OkHttpClient okHttpClient = new OkHttpClient();
Request request = new Request.Builder().url("https://www.httpbin.org/get?a=1&b=2").build();
//准备好请求的Call对象
Call call = okHttpClient.newCall(request);
//进行异步请求
call.enqueue(new Callback() {
@Override
public void onFailure(@NotNull Call call, @NotNull IOException e) {
}
@Override
public void onResponse(@NotNull Call call, @NotNull Response response) throws IOException {
//响应码 200~299成功，400~500服务器错误，跟服务器的通信是成功的都会回调这个函数，但是服务器处理请求的数据不一定成功
if (response.isSuccessful()){
Log.i(TAG, "getAsync: "+response.body().string());
}
}
});
}
- 2.2 POST请求：
- POST同步请求：
public void postSync(View view) {
OkHttpClient okHttpClient = new OkHttpClient();
//okhttp创建的request对象默认是get请求，如果是post要使用FormBody配合.post()设置
//而POST请求要设置RequestBody
new Thread(){
@Override
public void run() {
FormBody formBody = new FormBody.Builder()
.add("a", "1")
.add("b", "2")
.build();
Request request = new Request.Builder()
.url("https://www.httpbin.org/post")
.post(formBody)
.build();
//准备好请求的Call对象
Call call = okHttpClient.newCall(request);
try {
Response response = call.execute();
Log.i(TAG, "PostSync: "+response.body().string());
} catch (IOException e) {
e.printStackTrace();
}
}
}.start();
}
- POST异步请求：
public void postAsync(View view) {
OkHttpClient okHttpClient = new OkHttpClient();
FormBody formBody = new FormBody.Builder()
.add("a", "1")
.add("b", "2")
.build();
Request request = new Request.Builder()
.url("https://www.httpbin.org/post")
.post(formBody)
.build();
//准备好请求的Call对象
Call call = okHttpClient.newCall(request);
call.enqueue(new Callback() {
@Override
public void onFailure(@NotNull Call call, @NotNull IOException e) {
}
@Override
public void onResponse(@NotNull Call call, @NotNull Response response) throws IOException {
if (response.isSuccessful()){
Log.i(TAG, "PostAsync: "+response.body().string());
}
}
});
}
两者综合来看，request对应的是get请求，而formbody对应的是post请求
3.添加拦截器：
public void interceptorTest(){
//addInterceptor一定在前面执行，addNetworkInterceptor一定在后面执行
//使用cache缓存
OkHttpClient okHttpClient = new OkHttpClient.Builder()
//开启缓存
.cache(new Cache(new File("C:\\Users\\Administrator\\Desktop\\cache"),1024*1024))
.addInterceptor(new Interceptor() {
@NotNull
@Override
public Response intercept(@NotNull Chain chain) throws IOException {
//请求之前的前置处理，和请求之后的后置处理
//例如请求前，添加平台，版本号
//在请求前可以拿到这个request对象,再重新封装一个新的request,把平台信息和版本号封装进去，再发出去
//拦截器可以添加多个，按照顺序来执行
Request request = chain.request().newBuilder().addHeader("os", "android").addHeader("version", "1.1.0").build();
Response response = chain.proceed(request);
return response;
}
}).addNetworkInterceptor(new Interceptor() {
@NotNull
@Override
public Response intercept(@NotNull Chain chain) throws IOException {
System.out.println("version:"+chain.request().header("version"));
return chain.proceed(chain.request());
}
}).build();
Request request = new Request.Builder().url("https://www.httpbin.org/get?a=1&b=2").build();
Call call = okHttpClient.newCall(request);
try {
Response response = call.execute();
System.out.println(response.body().string());
} catch (IOException e) {
e.printStackTrace();
}
}
4.文件上传：
public void uploadFileTest(){
//上传的是：文件的key,文件的名字，文件本身
//采用的是MultipartBody来封装
//MediaType详情参考：https://blog.csdn.net/sinat_34241861/article/details/110648469
//Content_Type：application/x-www-form-urlencoded 默认是这种提交，采取的形式是键值对形式：key1:value1&key2:value2&key3:value3
//Content_type:multipart/form-data，数据被编码为一条消息，一般用于文件上传
//Content_Type:application/octet-stream，提交二进制数据，如果用于文件上传，只能上传一个文件
//Content_Type:application/json,提交json数据
OkHttpClient okHttpClient = new OkHttpClient();
File file1 = new File("C:\\Users\\Administrator\\Desktop\\1.txt");
File file2 = new File("C:\\Users\\Administrator\\Desktop\\2.txt");
MultipartBody multipartBody = new MultipartBody.Builder()
.addFormDataPart("file1", file1.getName(), RequestBody.create(file1, MediaType.parse("text/plain")))
.addFormDataPart("file2", file2.getName(), RequestBody.create(file1, MediaType.parse("text/plain")))
.addFormDataPart("a","1")//还可以添加额外的参数
.build();
Request request = new Request.Builder().url("https://www.httpbin.org/post").post(multipartBody).build();
Call call = okHttpClient.newCall(request);
try {
Response response = call.execute();
System.out.println(response.body().string());
} catch (IOException e) {
e.printStackTrace();
}
5.Json数据上传：
//上传json数据
//使用的RequestBody来封装
OkHttpClient okHttpClient = new OkHttpClient();
RequestBody requestBody = RequestBody.create("{\"a\":1,\"b\":2}", MediaType.parse("application/json"));
Request request = new Request.Builder().url("https://www.httpbin.org/post").post(requestBody).build();
Call call = okHttpClient.newCall(request);
try {
Response response = call.execute();
System.out.println(response.body().string());
} catch (IOException e) {
e.printStackTrace();
}
.使用cookies：
cookie是某些网站为了辨别用户的身份，进行会话跟踪（比如确定登录状态）而存储在本地终端上的数据，由客户端保存信息
public class UseCookie {
//cookie的相关配置
Map> cookies = new HashMap<>();
@Test
public void useCookie(){
OkHttpClient okHttpClient = new OkHttpClient.Builder()
.cookieJar(new CookieJar() {
@Override
public void saveFromResponse(@NotNull HttpUrl httpUrl, @NotNull List list) {
//会把服务器返回的cookie封装成list集合，返回回来，可以用文件保存或者放在内存中
cookies.put(httpUrl.host(),list);
}
@NotNull
@Override
public List loadForRequest(@NotNull HttpUrl httpUrl) {
//请求网站的url
List cookies = UseCookie.this.cookies.get(httpUrl.host());
return cookies == null ? new ArrayList():cookies;
}
})
.build();
//填入你自己的wanandroid账号和密码
FormBody formBody = new FormBody.Builder().add("username", "xxx")
.add("password", "xxxxxx").build();
Request request = new Request.Builder().url("https://www.wanandroid.com/user/login")
.post(formBody)
.build();
//准备好请求的Call对象
Call call = okHttpClient.newCall(request);
//进行同步请求
try {
Response response = call.execute();
System.out.println(response.body().string());
} catch (IOException e) {
e.printStackTrace();
}
//请求收藏文章列表接口
request = new Request.Builder().url("https://www.wanandroid.com/lg/collect/list/0/json")
.build();
//准备好请求的Call对象
call = okHttpClient.newCall(request);
//进行同步请求
try {
Response response = call.execute();
System.out.println(response.body().string());
} catch (IOException e) {
e.printStackTrace();
}
}
}