jdk 11 自带的HttpClient

文章目录

• jdk 11 自带的HttpClient
• • 步骤1：创建jdk HttpClient 对象
  • 步骤2：创建请求
  • 步骤3：使用client.sent()发送同步请求
  • 步骤4：处理响应
  • 下面是发送post请求，请求类型是json，使用client.sent()发送**异步**请求
  • 完整示例：不用改，可以直接用
  • 武林秘籍:

步骤1：创建jdk HttpClient 对象

 /*** 创建jdk HttpClient 对象** @return*/public static HttpClient getHttpClient() {return HttpClient.newBuilder().version(HttpClient.Version.HTTP_1_1).followRedirects(HttpClient.Redirect.NORMAL)//连接超时时间.connectTimeout(Duration.ofSeconds(20)).proxy(ProxySelector.getDefault())//.executor().build();}

步骤2：创建请求

/*** 描述：创建请求* get请求不带参数、get请求带参数，* post请求不带参数、post请求带参数* 都可以用该方法** @param method {@link JdkHttpClientUtil#GET,JdkHttpClientUtil#POST}* @param uri    请求地址* @param query  查询字符串 如 ie=utf-8&csq=1 或者json字符串* @param header 请求头数组 如：
 String[] header=new String[]*  {"token1Name","token1Val","token2Name","token2Val"};
*/public static HttpRequest getOrPostHttpRequest(String method, String uri, String query, String[] header) {final HttpRequest.Builder builder = HttpRequest.newBuilder().uri(URI.create(uri));// 判断是否有请求头参数headerif (header != null && header.length >= 0) {builder.headers(header);}returnbuilder//判断是否有查询参数.method(method, (query == null || query == "") ? HttpRequest.BodyPublishers.noBody() :HttpRequest.BodyPublishers.ofString(query, StandardCharsets.UTF_8)//这两种方法都ok// HttpRequest.BodyPublishers.ofByteArray(query.getBytes()))//读取超时时间.timeout(Duration.ofMinutes(2)).build();}
 
步骤3：使用client.sent()发送同步请求
 
//3.发送请求final HttpResponse response = client.send(request, HttpResponse.BodyHandlers.ofString(StandardCharsets.UTF_8));
 
步骤4：处理响应
 
        //4.处理响应final int statusCode = response.statusCode();final String responseBody = response.body();System.out.println("返回状态码是：" + statusCode);System.out.println(responseBody);
 
下面是发送post请求，请求类型是json，使用client.sent()发送异步请求
 
 //下面是发送post 请求，请求类型为json ,希望接收jsonfinal String uri2 = "https://www2.deepl.com/jsonrpc?method=LMT_split_text";String queryJson = "{\"jsonrpc\":\"2.0\",\"method\": \"LMT_split_text\",\"params\":{\"texts\":[\"followRedirects\"],\"commonJobParams\":{\"mode\":\"translate\"},\"lang\":{\"lang_user_selected\":\"EN\",\"preference\":{\"weight\":{\"DE\":0.19473,\"EN\":24.18327,\"ES\":0.1889,\"FR\":0.29868,\"IT\":0.13393,\"JA\":0.07362,\"NL\":0.36924,\"PL\":0.17236,\"PT\":0.11651,\"RU\":0.04533,\"ZH\":1.60654,\"BG\":0.0363,\"CS\":0.12581,\"DA\":0.21426,\"EL\":0.04046,\"ET\":0.14302,\"FI\":0.07996,\"HU\":0.07409,\"LT\":0.06742,\"LV\":0.04943,\"RO\":0.07113,\"SK\":0.12092,\"SL\":0.04123,\"SV\":0.29803,\"TR\":0.0578,\"ID\":0.0757,\"UK\":0.03858},\"default\":\"default\"}}},\"id\":13070003}";String[] header2=new String[]{"content-type","application/json","Accept", "application/json" };HttpRequest request2 = getOrPostHttpRequest(JdkHttpClientUtil.POST, uri2, queryJson, header2);//client.sendAsync 发送异步方法final CompletableFuture> future = client.sendAsync(request2, HttpResponse.BodyHandlers.ofString(StandardCharsets.UTF_8));final HttpResponse response2 = future.get();//4.处理响应final int statusCode2 = response2.statusCode();final String responseBody2 = response2.body();System.out.println("返回状态码是：" + statusCode2);System.out.println(responseBody2);
 
 
完整示例：不用改，可以直接用
 
import java.net.ProxySelector;
import java.net.URI;
import java.net.http.HttpClient;
import java.net.http.HttpRequest;
import java.net.http.HttpResponse;
import java.nio.charset.StandardCharsets;
import java.time.Duration;
import java.util.concurrent.CompletableFuture;/***  JdkHttpClientUtil 类所有的方法 都是jdk11 自带的**  HttpRequest.BodyPublishers 用于处理请求参数，如：是以字符串传送，还是按字节*  HttpResponse.BodyHandlers  用于处理响应体，如：是处理成响应文本，还是处理成响应流**  武林秘籍:https://openjdk.org/groups/net/httpclient/recipes.htm*/
public class JdkHttpClientUtil {public static final String GET = "GET";public static final String POST = "POST";public static void main(String[] args) throws Exception {// 1. 创建jdk HttpClient 对象HttpClient client = getHttpClient();// final String uri = "https://www.baidu.com";// HttpRequest request = getHttpRequest(uri);// 2. 构建HttpRequest请求对象final String uri = "https://www.baidu.com/s";String query = "ie=utf-8&csq=1&pstg=20&mod=2&isbd=1&cqid=b6d9801e00080d0a&istc=886&ver=Rt5bJQkDOb0aje7jof0Un39Z1rBzXCmLDoO&chk=638a2e8a&isid=EF1ABC098AE51628&ie=utf-8&f=8&rsv_bp=1&tn=baidu&wd=HttpClient&ct=2097152&si=oracle.com&oq=Http%2526lt%253Blient&rsv_pq=aeab00610008ae59&rsv_t=0be6mAUUmhf6O8ehMCFN6anJ71ZkKAEAIKGmiCqHQbETtQ95Cv8pth6IPnw&rqlang=cn&rsv_enter=0&rsv_dl=tb&rsv_btype=t&bs=HttpClient&f4s=1&_ck=1886.1.86.79.22.804.37&isnop=0&rsv_stat=-2&rsv_bp=1";HttpRequest request = getOrPostHttpRequest(JdkHttpClientUtil.GET, uri, query, null);//3.发送请求final HttpResponse response = client.send(request, HttpResponse.BodyHandlers.ofString(StandardCharsets.UTF_8));//4.处理响应final int statusCode = response.statusCode();final String responseBody = response.body();System.out.println("返回状态码是：" + statusCode);System.out.println(responseBody);//下面是发送post 请求，请求类型为json ,希望接收jsonfinal String uri2 = "https://www2.deepl.com/jsonrpc?method=LMT_split_text";String queryJson = "{\"jsonrpc\":\"2.0\",\"method\": \"LMT_split_text\",\"params\":{\"texts\":[\"followRedirects\"],\"commonJobParams\":{\"mode\":\"translate\"},\"lang\":{\"lang_user_selected\":\"EN\",\"preference\":{\"weight\":{\"DE\":0.19473,\"EN\":24.18327,\"ES\":0.1889,\"FR\":0.29868,\"IT\":0.13393,\"JA\":0.07362,\"NL\":0.36924,\"PL\":0.17236,\"PT\":0.11651,\"RU\":0.04533,\"ZH\":1.60654,\"BG\":0.0363,\"CS\":0.12581,\"DA\":0.21426,\"EL\":0.04046,\"ET\":0.14302,\"FI\":0.07996,\"HU\":0.07409,\"LT\":0.06742,\"LV\":0.04943,\"RO\":0.07113,\"SK\":0.12092,\"SL\":0.04123,\"SV\":0.29803,\"TR\":0.0578,\"ID\":0.0757,\"UK\":0.03858},\"default\":\"default\"}}},\"id\":13070003}";String[] header2=new String[]{"content-type","application/json","Accept", "application/json" };HttpRequest request2 = getOrPostHttpRequest(JdkHttpClientUtil.POST, uri2, queryJson, header2);//client.sendAsync 发送异步方法final CompletableFuture> future = client.sendAsync(request2, HttpResponse.BodyHandlers.ofString(StandardCharsets.UTF_8));final HttpResponse response2 = future.get();//4.处理响应final int statusCode2 = response2.statusCode();final String responseBody2 = response2.body();System.out.println("返回状态码是：" + statusCode2);System.out.println(responseBody2);}/*** get请求无参* @param uri* @return*/public static HttpRequest getHttpRequest(String uri) {return HttpRequest.newBuilder().uri(URI.create(uri))//读取超时时间.timeout(Duration.ofMinutes(2)).GET().build();}/*** 描述：创建请求* get请求不带参数、get请求带参数，* post请求不带参数、post请求带参数* 都可以用该方法** @param method {@link JdkHttpClientUtil#GET,JdkHttpClientUtil#POST}* @param uri    请求地址* @param query  查询字符串 如 ie=utf-8&csq=1 或者json字符串* @param header 请求头数组 如：
String[] header=new String[]{"token1Name","token1Val","token2Name","token2Val"};
*               @return*/public static HttpRequest getOrPostHttpRequest(String method, String uri, String query, String[] header) {final HttpRequest.Builder builder = HttpRequest.newBuilder().uri(URI.create(uri));// 判断是否有请求头参数headerif (header != null && header.length >= 0) {builder.headers(header);}returnbuilder//判断是否有查询参数.method(method, (query == null || query == "") ? HttpRequest.BodyPublishers.noBody() :HttpRequest.BodyPublishers.ofString(query, StandardCharsets.UTF_8)//这两种方法都ok// HttpRequest.BodyPublishers.ofByteArray(query.getBytes()))//读取超时时间.timeout(Duration.ofMinutes(2)).build();}/*** 创建jdk HttpClient 对象** @return*/public static HttpClient getHttpClient() {return HttpClient.newBuilder().version(HttpClient.Version.HTTP_1_1).followRedirects(HttpClient.Redirect.NORMAL)//连接超时时间.connectTimeout(Duration.ofSeconds(20)).proxy(ProxySelector.getDefault())//.executor().build();}
}
 
武林秘籍:
 
https://openjdk.org/groups/net/httpclient/recipes.htm
 
 
学到了就要教人，赚到了就要给人，开源精神，资源共享 resource sharing!