okhttp的学习与简单使用

官方地址: https://github.com/square/okhttp/
一个处理网络请求的开源项目,是安卓端最火热的轻量级框架

 <dependency>
     <groupId>com.squareup.okhttp3</groupId>
     <artifactId>okhttp</artifactId>
     <version>3.10.0</version>
  </dependency>
    

简单测试okhttp Get请求

package com.sb.okhttp.okhttp;

import java.io.IOException;
import okhttp3.Call;
import okhttp3.Callback;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.Response;

public class Test {
	// 创建OkhttpClient对象
	OkHttpClient client = new OkHttpClient();
	
	/**
	 * okhttp get 同步请求
	 */
	public void testGet(String url) {
		Request request = new Request.Builder().get().url(url) // 请求地址
				.build();// 创建Request对象、
		Response response = null;
		try {
			// 执行请求并获取Response对象
			response = client.newCall(request).execute();
		} catch (IOException e) {
			e.printStackTrace();
		}
		if (null != response) {
			if (response.isSuccessful()) {// 请求成功
				System.out.println(response.code());// 状态码
				System.out.println(response.message());// message
				try {
					String res = response.body().string();
					System.out.println(res);
				} catch (IOException e) {
					e.printStackTrace();
				}
			} else {
				System.out.println("请求失败");
			}
		} else {
			System.out.println("请求失败");
		}
	}
	
	/**
	 * okhttp get 异步请求
	 */
	public void asynchronousGet(String url){
		Request request = new Request.Builder().get().url(url) // 请求地址
				.build();// 创建Request对象
		client.newCall(request).enqueue(new Callback() {
			public void onResponse(Call arg0, Response response) throws IOException {
				//注:onResponse 回调会在子线程中执行,而不是主线程
				if (response.isSuccessful()) {// 请求成功
					System.out.println(response.code());// 状态码
					System.out.println(response.message());// message
					try {
						String res = response.body().string();
						System.out.println(res);
					} catch (IOException e) {
						e.printStackTrace();
					}
				} else {
					System.out.println("请求失败");
				}
			}
			//注:onFailure 回调会在子线程中执行,而不是主线程
			public void onFailure(Call arg0, IOException arg1) {
				System.out.println("请求失败");
			}
			
		});
	}
	
	public static void main(String[] args) {
		Test t = new Test();
		String url = "http://www.baidu.com";
		//t.testGet(url);
		t.asynchronousGet(url);
	}
}

测试okhttp Post请求

package com.sb.okhttp.okhttp;

import java.io.File;
import java.io.IOException;
import okhttp3.Call;
import okhttp3.Callback;
import okhttp3.FormBody;
import okhttp3.MediaType;
import okhttp3.MultipartBody;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.RequestBody;
import okhttp3.Response;

public class TestPost {
	//数据类型json
	public static final MediaType mediaType = MediaType.parse("application/json;charset=utf-8");
	//数据类型File
	public static final MediaType mediaType_file = MediaType.parse("File/*");
	
	OkHttpClient client = new OkHttpClient();
	
	/**
	 * Post提交Json数据
	 * @param url   提交的地址
	 * @param json  提交啊的json数据
	 * @return  返回post之后返回的结果数据
	 */
	public String postJson(String url,String json){
		RequestBody body = RequestBody.create(mediaType,json);
		Request request = new Request.Builder().url(url).post(body).build();
		Response response = null;
		try {
			response = client.newCall(request).execute();
			if(null!=response){
				if(response.isSuccessful()){
					return response.body().string();
				}
			}
		} catch (IOException e) {
			e.printStackTrace();
		}
		return null;
	}
	
	/**
	 * okhttp  模拟表单提交
	 * @param url post的地址
	 */
	public void postKeyValue(String url ){
		FormBody.Builder formBody = new FormBody.Builder();//创建表单请求体
		formBody.add("name","zbb");
		formBody.add("age","26");
		Request request = new Request.Builder()   //创建请求对象
		                  .url(url)
		                  .post(formBody.build()) //传递请求体
		                  .build();
		client.newCall(request).enqueue(new Callback() {
			public void onResponse(Call call, Response res) throws IOException {
				//请求成功响应后回调
				if(res.isSuccessful()){
					String result = res.body().string();
					System.out.println(result);
				}
			}
			
			public void onFailure(Call call, IOException arg1) {
				//请求失败后回调
				//....此处代码省略
			}
		});
	}
	
	/**
	 * okhttp 上传File对象
	 * @param filePath  file路径
	 * @param url 提交到的地址
	 */
	public void postFile(String filePath,String url){
		File file = new File(filePath);
		RequestBody body = RequestBody.create(mediaType_file,file);
		Request request = new Request.Builder()
							.url(url)
							.post(body)
							.build();
	    client.newCall(request).enqueue(new Callback() {
			public void onResponse(Call arg0, Response arg1) throws IOException {
				//请求成功响应后的回调
				//.....
			}
			
			public void onFailure(Call arg0, IOException arg1) {
				//请求失败后的回调
				//.....
			}
		});
	}
	
	/**
	 * okhttp post 既传递表单参数也提交File
	 * @param file 文件对象
	 * @param url 提交到的地址
	 */
	public void postMultipartBody(File file,String url){
		MultipartBody body = new MultipartBody.Builder()
		                     .setType(MultipartBody.FORM)
		                     .addFormDataPart("name","zbb")
		                     .addFormDataPart("age","26")
		                     .addFormDataPart("f",file.getName(),
		                    		 RequestBody.create(mediaType_file,file))
		                     .build();
		Request request = new Request.Builder()
		                  .url(url)
		                  .post(body)
		                  .build();
		client.newCall(request).enqueue(new Callback() {
			public void onResponse(Call arg0, Response arg1) throws IOException {
				//请求成功响应后的回调
				//.....
			}
			
			public void onFailure(Call arg0, IOException arg1) {
				//请求失败后的回调
				//.....
			}
		});
	}
	
	public static void main(String[] args) {
		
	}
    
}