Java中的OkHttpClient 工具类
作者：会改bug的程序员
这篇文章主要介绍了Java中的OkHttpClient工具类，具有很好的参考价值，希望杜大家有所帮助。如有错误或未考虑完全的地方，望不吝赐教
Java OkHttpClient 工具类
OkHttpClient
1、pom
<dependency> <groupId>com.squareup.okhttp3</groupId> <artifactId>okhttp</artifactId> <version>3.14.0</version> </dependency>
2.代码例子
import okhttp3.*;
import okhttp3.Request.Builder;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLEncoder;
import java.util.Iterator;
import java.util.Map;
import java.util.concurrent.TimeUnit;
import com.alibaba.fastjson.JSONObject;
public class HttpClient {
OkHttpClient okHttpClient;
public HttpClient() {
okHttpClient = new OkHttpClient.Builder()
.connectTimeout(10, TimeUnit.SECONDS)
.writeTimeout(10, TimeUnit.SECONDS)
.readTimeout(20, TimeUnit.SECONDS)
.build();
}
public void sendJson(String url, String json, Callback callback) {
//MediaType 设置Content-Type 标头中包含的媒体类型值
RequestBody requestBody = FormBody.create(MediaType.parse("application/json; charset=utf-8"), json);
Request request = new Request.Builder()
.url(url)//请求的url
.post(requestBody)
.build();
//创建/Call
Call call = okHttpClient.newCall(request);
//加入队列 异步操作
call.enqueue(callback);
}
private String attachHttpGetParams(String url, Map<String, String> params) {
Iterator<String> keys = params.keySet().iterator();
Iterator<String> values = params.values().iterator();
StringBuffer stringBuffer = new StringBuffer();
stringBuffer.append("?");
for (int i = 0; i < params.size(); i++) {
String value = null;
try {
value = URLEncoder.encode(values.next(), "utf-8");
} catch (Exception e) {
e.printStackTrace();
}
stringBuffer.append(keys.next() + "=" + value);
if (i != params.size() - 1) {
stringBuffer.append("&");
}
}
return url + stringBuffer.toString();
}
public String get(String url, Map<String, String> params) throws IOException {
Request request = new Request.Builder().url(attachHttpGetParams(url, params)).build();
return okHttpClient.newCall(request).execute().body().string();
}
public String post(String url, Map<String, String> formValues) throws IOException {
FormBody.Builder builder = new FormBody.Builder();
formValues.forEach((k, v) -> {
builder.add(k, v);
});
Request request = new Request.Builder().url(url).post(builder.build()).build();
Call call = okHttpClient.newCall(request);
return call.execute().body().string();
}
public String postWithHeaderJson(String url, Map<String, String> header, String json) throws IOException {
RequestBody requestBody = FormBody.create(MediaType.parse("application/json; charset=utf-8"), json);
Builder builderHeader = new Request.Builder();
header.forEach((k, v) -> {
builderHeader.addHeader(k, v);
});
Request request = builderHeader.url(url).post(requestBody).build();
Call call = okHttpClient.newCall(request);
return call.execute().body().string();
}
public String postJson(String url, String content) throws IOException {
RequestBody requestBody = FormBody.create(MediaType.parse("application/json; charset=utf-8"), content);
Request request = new Request.Builder().url(url).post(requestBody).build();
Call call = okHttpClient.newCall(request);
return call.execute().body().string();
}
public String getWithHeader(String url, Map<String, String> header) throws IOException {
Builder builderHeader = new Request.Builder();
header.forEach((k, v) -> {
builderHeader.addHeader(k, v);
});
Request request = builderHeader.url(url).build();
return okHttpClient.newCall(request).execute().body().string();
}
public static String sendPost(String url, String param) {
OutputStreamWriter out = null;
BufferedReader in = null;
String result = "";
try {
URL realUrl = new URL(url);
HttpURLConnection conn = null;
conn = (HttpURLConnection) realUrl.openConnection();
// 打开和URL之间的连接
// 发送POST请求必须设置如下两行
conn.setDoOutput(true);
conn.setDoInput(true);
conn.setRequestMethod("POST"); // POST方法
// 设置通用的请求属性
conn.setRequestProperty("accept", "*/*");
conn.setRequestProperty("connection", "Keep-Alive");
conn.setRequestProperty("user-agent",
"Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
conn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
conn.connect();
// 获取URLConnection对象对应的输出流
out = new OutputStreamWriter(conn.getOutputStream(), "UTF-8");
// 发送请求参数
out.write(param);
// flush输出流的缓冲
out.flush();
// 定义BufferedReader输入流来读取URL的响应
in = new BufferedReader(
new InputStreamReader(conn.getInputStream()));
String line;
while ((line = in.readLine()) != null) {
result += line;
}
} catch (Exception e) {
System.out.println("发送 POST 请求出现异常！" + e);
e.printStackTrace();
}
//使用finally块来关闭输出流、输入流
finally {
try {
if (out != null) {
out.close();
}
if (in != null) {
in.close();
}
} catch (IOException ex) {
ex.printStackTrace();
}
}
return result;
}
}工具类OkHttpClient解析
1.HttpUtils
public class HttpUtils {
public static String get(String urlString){
OkHttpClient okHttpClient = new OkHttpClient.Builder()
.addInterceptor(new LoggingInterceptor())//日志拦截器
.connectTimeout(10, TimeUnit.SECONDS)//连接超时
.readTimeout(10,TimeUnit.SECONDS)//读取超时
.writeTimeout(10,TimeUnit.SECONDS)//写入超时
.build();
Request request = new Request.Builder().url(urlString).get().build();
try {
Response response = okHttpClient.newCall(request).execute();
String result = response.body().string();
Log.i("dt","请求结果："+result);
return result;
} catch (IOException e) {
e.printStackTrace();
}
return "";
}
public static String postForm(String url,String[] name,String[] value){
OkHttpClient okHttpClient = new OkHttpClient.Builder()
.addInterceptor(new LoggingInterceptor())//日志拦截器
.connectTimeout(10, TimeUnit.SECONDS)//连接超时
.readTimeout(10,TimeUnit.SECONDS)//读取超时
.writeTimeout(10,TimeUnit.SECONDS)//写入超时
.build();
FormBody.Builder formBuild = new FormBody.Builder();
for (int i = 0; i < name.length; i++) {
formBuild.add(name[i],value[i]);
}
Request request = new Request.Builder().url(url).post(formBuild.build()).build();
try {
Response response = okHttpClient.newCall(request).execute();
String result = response.body().string();
Log.i("dt",result);
return result;
} catch (IOException e) {
e.printStackTrace();
}
return "";
}
public static String postFile(String url,String[] name,String[] value,String fileParamName,File file){
OkHttpClient okHttpClient = new OkHttpClient.Builder()
.addInterceptor(new LoggingInterceptor())//日志拦截器
.connectTimeout(10, TimeUnit.SECONDS)//连接超时
.readTimeout(10,TimeUnit.SECONDS)//读取超时
.writeTimeout(10,TimeUnit.SECONDS)//写入超时
.build();
MultipartBody.Builder requestBody = new MultipartBody.Builder().setType(MultipartBody.FORM);
if(file != null){
// MediaType.parse() 里面是上传的文件类型。
RequestBody body = RequestBody.create(MediaType.parse("image/*"), file);
String filename = file.getName();
// 参数分别为: 文件参数名 ，文件名称 ， RequestBody
requestBody.addFormDataPart(fileParamName, "jpg", body);
}
if (name!=null) {
for (int i = 0; i < name.length; i++) {
requestBody.addFormDataPart(name[i], value[i]);
}
}
Request request = new Request.Builder().url(url).post(requestBody.build()).build();
try {
Response response = okHttpClient.newCall(request).execute();
if (response.code()==200) {
return response.body().string();
}
} catch (IOException e) {
e.printStackTrace();
}
return "";
}
public static String postJson(String url,String jsonString){
OkHttpClient okHttpClient = new OkHttpClient();
RequestBody requestBody = RequestBody.create(MediaType.parse("application/json"),jsonString);
Request request = new Request.Builder().url(url).post(requestBody).build();
try {
Response response = okHttpClient.newCall(request).execute();
return response.body().string();
} catch (IOException e) {
e.printStackTrace();
}
return "";
}
}总结
以上为个人经验，希望能给大家一个参考，也希望大家多多支持脚本之家。