Httpclient5工具类

1、说明

就是一个工具类，使用了httpclient5-fluent流式组件，其实单纯用这个组件已经很方便了。只是有一些配置要自定义，所以再封装一层。

注释懒得加了，看参数名应该就明白了。有哪里不对的欢迎指正。

2、maven引用

  • 这里流式组件已经依赖了 httpclient5了，所以不需要再单独引用。
  • hutool工具包太好用了，我所有项目都会引用。hutool里也有httputil，只是不支持连接池。
        <dependency>
            <groupId>org.apache.httpcomponents.client5</groupId>
            <artifactId>httpclient5-fluent</artifactId>
            <version>5.0.3</version>
        </dependency>
        <!-- 小而全的Java工具类库 -->
        <dependency>
            <groupId>cn.hutool</groupId>
            <artifactId>hutool-all</artifactId>
            <version>5.5.9</version>
        </dependency>

3、工具类

  • 去掉了https证书验证
  • 禁用了请求重试 
    disableAutomaticRetries()
  • 简单的post、get、上传文件 等封装。有需要其他的可以自行调用call 方法。
  • 可自行调整连接池大小和超时时间。
import cn.hutool.core.collection.CollUtil;
import cn.hutool.core.io.FileUtil;
import cn.hutool.core.util.CharsetUtil;
import cn.hutool.core.util.StrUtil;
import org.apache.hc.client5.http.config.RequestConfig;
import org.apache.hc.client5.http.entity.UrlEncodedFormEntity;
import org.apache.hc.client5.http.entity.mime.ContentBody;
import org.apache.hc.client5.http.entity.mime.MultipartEntityBuilder;
import org.apache.hc.client5.http.fluent.Form;
import org.apache.hc.client5.http.fluent.Request;
import org.apache.hc.client5.http.fluent.Response;
import org.apache.hc.client5.http.impl.classic.CloseableHttpClient;
import org.apache.hc.client5.http.impl.classic.HttpClientBuilder;
import org.apache.hc.client5.http.impl.io.PoolingHttpClientConnectionManagerBuilder;
import org.apache.hc.client5.http.ssl.NoopHostnameVerifier;
import org.apache.hc.client5.http.ssl.SSLConnectionSocketFactory;
import org.apache.hc.core5.http.ContentType;
import org.apache.hc.core5.http.HttpEntity;
import org.apache.hc.core5.http.ParseException;
import org.apache.hc.core5.http.io.entity.EntityUtils;
import org.apache.hc.core5.http.io.entity.HttpEntities;
import org.apache.hc.core5.util.TimeValue;
import org.apache.hc.core5.util.Timeout;

import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLEngine;
import javax.net.ssl.TrustManager;
import javax.net.ssl.X509ExtendedTrustManager;
import java.io.File;
import java.io.IOException;
import java.net.Socket;
import java.nio.charset.Charset;
import java.security.KeyManagementException;
import java.security.NoSuchAlgorithmException;
import java.security.cert.X509Certificate;
import java.util.Map;

/**
 * @author sun
 * @date 2021-02-25
 **/
public class HttpUtil {
    private static final int maxConnTotal = 200;
    private static final Timeout connectTimeout = Timeout.ofSeconds(10);
    private static final Timeout requestTimeout = Timeout.ofSeconds(30);

    public static void main(String[] args) throws Exception {
    }

    public static String uploadFile(String urlString, Map<String, Object> paramMap) throws IOException {
        return uploadFile(urlString, null, paramMap, CharsetUtil.CHARSET_UTF_8)
                .returnContent()
                .asString(CharsetUtil.CHARSET_UTF_8);
    }

    public static String uploadFile(String urlString, Map<String, Object> paramMap, Charset charSet) throws IOException {
        return uploadFile(urlString, null, paramMap, charSet)
                .returnContent()
                .asString(charSet);
    }

    public static Response uploadFile(String urlString, Map<String, Object> headerMap, Map<String, Object> paramMap) throws IOException {
        return uploadFile(urlString, headerMap, paramMap, CharsetUtil.CHARSET_UTF_8);
    }

    public static Response uploadFile(String urlString, Map<String, Object> headerMap, Map<String, Object> paramMap, Charset charSet) throws IOException {
        MultipartEntityBuilder builder = MultipartEntityBuilder.create().setCharset(charSet);
        paramMap.forEach((k, v) -> {
            //判断是文件还是文本
            if (v instanceof File) {
                File file = (File) v;
                builder.addBinaryBody(k, file, ContentType.MULTIPART_FORM_DATA.withCharset(charSet), FileUtil.getName(file));
            } else if (v instanceof ContentBody) {
                builder.addPart(k, (ContentBody) v);
            } else {
                builder.addTextBody(k, String.valueOf(v), ContentType.TEXT_PLAIN.withCharset(charSet));
            }
        });
        Request request = Request.post(urlString)
                .body(builder.build());
        //添加消息头
        if (CollUtil.isNotEmpty(headerMap)) {
            headerMap.forEach((k, v) -> request.addHeader(k, String.valueOf(v)));
        }
        return call(request);
    }

    public static String post(String urlString, Map<String, Object> paramMap) throws IOException {
        return post(urlString, paramMap, CharsetUtil.CHARSET_UTF_8);
    }

    public static String post(String urlString, Map<String, Object> paramMap, Charset charSet) throws IOException {
        return post(urlString, null, paramMap, charSet)
                .returnContent()
                .asString(charSet);
    }

    public static Response post(String urlString, Map<String, Object> headerMap, Map<String, Object> paramMap) throws IOException {
        return post(urlString, headerMap, paramMap, CharsetUtil.CHARSET_UTF_8);
    }

    public static Response post(String urlString, Map<String, Object> headerMap, Map<String, Object> paramMap, Charset charSet) throws IOException {
        Form form = Form.form();
        if (CollUtil.isNotEmpty(paramMap)) {
            paramMap.forEach((k, v) -> form.add(k, String.valueOf(v)));
        }
        Request request = Request.post(urlString)
                .bodyForm(form.build(), charSet);
        //添加消息头
        if (CollUtil.isNotEmpty(headerMap)) {
            headerMap.forEach((k, v) -> request.addHeader(k, String.valueOf(v)));
        }
        return call(request);
    }

    public static String post(String urlString, String body) throws IOException {
        return post(urlString, body, CharsetUtil.CHARSET_UTF_8);
    }

    public static String post(String urlString, String body, Charset charSet) throws IOException {
        return post(urlString, null, body, charSet)
                .returnContent()
                .asString(charSet);
    }

    public static Response post(String urlString, Map<String, Object> headerMap, String body) throws IOException {
        return post(urlString, headerMap, body, CharsetUtil.CHARSET_UTF_8);
    }

    public static Response post(String urlString, Map<String, Object> headerMap, String body, Charset charSet) throws IOException {
        HttpEntity httpEntity = HttpEntities.create(body, getContentType(body, charSet));
        Request request = Request.post(urlString)
                .body(httpEntity);
        //添加消息头
        if (CollUtil.isNotEmpty(headerMap)) {
            headerMap.forEach((k, v) -> request.addHeader(k, String.valueOf(v)));
        }
        return call(request);
    }

    public static String get(String urlString) throws IOException, ParseException {
        return get(urlString, null, CharsetUtil.CHARSET_UTF_8);
    }

    public static String get(String urlString, Map<String, Object> paramMap) throws IOException, ParseException {
        return get(urlString, paramMap, CharsetUtil.CHARSET_UTF_8);
    }

    public static String get(String urlString, Map<String, Object> paramMap, Charset charSet) throws IOException, ParseException {
        return get(urlString, null, paramMap, charSet)
                .returnContent()
                .asString(charSet);
    }

    public static String get(String urlString, Map<String, Object> headerMap, Map<String, Object> paramMap) throws IOException, ParseException {
        return get(urlString, headerMap, paramMap, CharsetUtil.CHARSET_UTF_8)
                .returnContent()
                .asString(CharsetUtil.CHARSET_UTF_8);
    }

    public static Response get(String urlString, Map<String, Object> headerMap, Map<String, Object> paramMap, Charset charSet) throws IOException, ParseException {
        Form form = Form.form();
        if (CollUtil.isNotEmpty(paramMap)) {
            paramMap.forEach((k, v) -> form.add(k, String.valueOf(v)));
        }
        String paramStr = EntityUtils.toString(new UrlEncodedFormEntity(form.build(), charSet));
        Request request = Request.get(urlString + '?' + paramStr);
        //添加消息头
        if (CollUtil.isNotEmpty(headerMap)) {
            headerMap.forEach((k, v) -> request.addHeader(k, String.valueOf(v)));
        }
        return call(request);
    }

    public static Response call(Request request) throws IOException {
        return request.execute(Client.c);
    }

    public static ContentType getContentType(String body, Charset charSet) {
        ContentType contentType = ContentType.TEXT_PLAIN;
        if (StrUtil.isNotBlank(body)) {
            char firstChar = body.charAt(0);
            switch (firstChar) {
                case '{':
                case '[':
                    // JSON请求体
                    contentType = ContentType.APPLICATION_JSON;
                    break;
                case '<':
                    // XML请求体
                    contentType = ContentType.APPLICATION_XML;
                    break;
                default:
                    break;
            }
        }
        if (charSet != null) {
            contentType.withCharset(charSet);
        }
        return contentType;
    }

    private static class Client {
        private static final CloseableHttpClient c = HttpClientBuilder.create()
                .setConnectionManager(PoolingHttpClientConnectionManagerBuilder.create()
                        .setSSLSocketFactory(getSSLFactory())
                        .setValidateAfterInactivity(TimeValue.ofSeconds(10))
                        .setMaxConnPerRoute(maxConnTotal - 1)
                        .setMaxConnTotal(maxConnTotal)
                        .build())
                .evictIdleConnections(TimeValue.ofMinutes(1))
                .disableAutomaticRetries()
                .setDefaultRequestConfig(RequestConfig.custom()
                        .setConnectTimeout(connectTimeout)
                        .setConnectionRequestTimeout(requestTimeout)
                        .build())
                .build();

        private static SSLConnectionSocketFactory getSSLFactory() {
            X509ExtendedTrustManager trustManager = new X509ExtendedTrustManager() {
                @Override
                public void checkClientTrusted(X509Certificate[] x509Certificates, String s, Socket socket) {
                }

                @Override
                public void checkServerTrusted(X509Certificate[] x509Certificates, String s, Socket socket) {
                }

                @Override
                public void checkClientTrusted(X509Certificate[] x509Certificates, String s, SSLEngine sslEngine) {
                }

                @Override
                public void checkServerTrusted(X509Certificate[] x509Certificates, String s, SSLEngine sslEngine) {
                }

                @Override
                public void checkClientTrusted(X509Certificate[] arg0, String arg1) {
                }

                @Override
                public void checkServerTrusted(X509Certificate[] arg0, String arg1) {
                }

                @Override
                public X509Certificate[] getAcceptedIssuers() {
                    return new X509Certificate[0];
                }
            };
            SSLContext ctx = null;
            try {
                ctx = SSLContext.getInstance("TLS");
                ctx.init(null, new TrustManager[]{trustManager}, null);
            } catch (NoSuchAlgorithmException | KeyManagementException e) {
                e.printStackTrace();
            }
            assert ctx != null;
            return new SSLConnectionSocketFactory(ctx, NoopHostnameVerifier.INSTANCE);
        }
    }
}
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原文地址：https://www.cnblogs.com/enenen/p/14470434.html