java springboot 初体验（九）对接http请求

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使用Java调用http请求的6种方式
1. 使用HttpURLConnection调用http请求
2. 使用commons-httpclient调用http请求
3. 使用org.apache.httpcomponents调用http请求
4. 使用OkHttp调用http请求
5. 使用RestTemplate调用http请求
6. 使用OpenFeign调用http请求

package com.zwj.zwjproject.utils;

import com.google.gson.Gson;
import com.zwj.zwjproject.interceptor.TraceInterceptor;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.httpclient.Header;
import org.apache.commons.httpclient.HttpClient;
import org.apache.commons.httpclient.methods.PostMethod;
import org.apache.commons.httpclient.methods.RequestEntity;
import org.apache.commons.httpclient.methods.StringRequestEntity;
import org.apache.commons.httpclient.params.HttpMethodParams;
import org.slf4j.MDC;
import org.springframework.stereotype.Component;

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.Map;

/**
 * @ClassName: HttpCommonsHttpClientUtil
 * @Author zhangwujie
 * @Date 2022/8/22 8:53 下午
 * @Description:
 */
@Slf4j
@Component
public class HttpCommonsHttpClientUtil {

    private static final Gson gson = new Gson();

    public String doJsonPostFromMap(String url,Map<String, Object> bodyMap) throws Exception {
        // 2.请求参数
        String bodyString = gson.toJson(bodyMap);
        // 3.创建连接
        HttpClient httpClient = new HttpClient();
        // 设置连接参数url
        PostMethod postMethod = new PostMethod(url);
        // 设置连接参数请求类型
        postMethod.addRequestHeader("Content-Type", "application/json");
        // 设置连接参数链路追踪traceId
        postMethod.addRequestHeader(TraceInterceptor.TRACE_ID, MDC.get(TraceInterceptor.TRACE_ID));
        // 设置连接参数请求参数
        RequestEntity entity = new StringRequestEntity(bodyString, "application/json", "UTF-8");
        postMethod.setRequestEntity(entity);
        // 解决返回值中文乱码
        postMethod.getParams().setParameter(HttpMethodParams.HTTP_CONTENT_CHARSET, "UTF-8");
        // 4.发起请求
        log.info("HttpCommonsHttpClientUtil doJsonPostFromMap url={} reqBody={}", url, bodyString);
        int code = httpClient.executeMethod(postMethod);
        // 5.接收返回值
        String respBody = postMethod.getResponseBodyAsString();
        log.info("HttpCommonsHttpClientUtil doJsonPostFromMap httpStatus={} respBody={}", code, respBody);
        if (code != 200) {
            throw new Exception("调用服务端异常");
        }
        // 6.关闭连接
        postMethod.releaseConnection();
        return respBody;
    }
}

package com.zwj.zwjproject.utils;

import com.google.gson.Gson;
import com.zwj.zwjproject.interceptor.TraceInterceptor;
import lombok.extern.slf4j.Slf4j;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClientBuilder;
import org.apache.http.util.EntityUtils;
import org.slf4j.MDC;
import org.springframework.stereotype.Component;

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.Map;

/**
 * @ClassName: HttpComponentsUtil
 * @Author zhangwujie
 * @Date 2022/8/22 8:53 下午
 * @Description:
 */
@Slf4j
@Component
public class HttpComponentsUtil {

    private static final Gson gson = new Gson();

    public String doJsonPostFromMap(String url,Map<String, Object> bodyMap) throws Exception {
        // 2.请求参数JSON格式
        String bodyString = gson.toJson(bodyMap);
        // 3.创建连接与设置连接参数
        CloseableHttpClient httpClient = HttpClientBuilder.create().build();
        HttpPost httpPost = new HttpPost(url);
        StringEntity entity = new StringEntity(bodyString);
        entity.setContentEncoding("UTF-8");
        entity.setContentType("application/json");
        httpPost.setEntity(entity);
        // 设置header链路追踪
        httpPost.addHeader(TraceInterceptor.TRACE_ID, MDC.get(TraceInterceptor.TRACE_ID));
        // 4.发起请求与接收返回值
        log.info("HttpComponentsUtil doJsonPostFromMap url={} reqBody={}", url, httpPost);
        HttpResponse response = httpClient.execute(httpPost);
        int statusCode = response.getStatusLine().getStatusCode();
        HttpEntity res = response.getEntity();
        String respBody = EntityUtils.toString(res);
        log.info("HttpComponentsUtil doJsonPostFromMap httpStatus={} respBody={}", statusCode, respBody);
        if (response.getStatusLine().getStatusCode() != 200) {
            throw new Exception("调用服务端异常.");
        }
        // 5.关闭连接
        httpClient.close();
        return respBody;
    }
}

package com.zwj.zwjproject.utils;

import com.google.gson.Gson;
import com.zwj.zwjproject.interceptor.TraceInterceptor;
import lombok.extern.slf4j.Slf4j;
import org.slf4j.MDC;
import org.springframework.http.HttpEntity;
import org.springframework.http.HttpHeaders;
import org.springframework.http.MediaType;
import org.springframework.stereotype.Component;
import org.springframework.web.client.RestTemplate;

import java.util.Map;

/**
 * @ClassName: HttpRestTemplateUtil
 * @Author zhangwujie
 * @Date 2022/8/22 8:53 下午
 * @Description:
 */
@Slf4j
@Component
public class HttpRestTemplateUtil {

    private static final Gson gson = new Gson();

    public String doJsonPostFromMap(String url,Map<String, Object> bodyMap) throws Exception {
        // 2.请求参数JSON格式
        String bodyString = gson.toJson(bodyMap);
        // 3.创建RestTemplate
        RestTemplate restTemplate = new RestTemplate();
        // 4.设置RestTemplate参数(请求头和body)
        HttpHeaders headers = new HttpHeaders();
        MediaType mediaType = MediaType.parseMediaType("application/json; charset=UTF-8");
        headers.setContentType(mediaType);
        headers.add("Accept", "application/json");
        // 设置header链路追踪
        headers.add(TraceInterceptor.TRACE_ID, MDC.get(TraceInterceptor.TRACE_ID));
        log.info("HttpRestTemplateUtil doJsonPostFromMap url={} reqBody={}", url, bodyString);
        HttpEntity<String> entity = new HttpEntity<>(bodyString, headers);
        // 5.使用RestTemplate发起请求与接收返回值
        String respBody = restTemplate.postForObject(url, entity, String.class);
        log.info("HttpRestTemplateUtil doJsonPostFromMap respBody={}", respBody);
        return respBody;
    }
}

package com.zwj.zwjproject.utils;

import com.google.gson.Gson;
import com.zwj.zwjproject.interceptor.TraceInterceptor;
import kong.unirest.HttpRequestWithBody;
import kong.unirest.HttpResponse;
import kong.unirest.JsonNode;
import kong.unirest.Unirest;
import lombok.extern.slf4j.Slf4j;
import org.slf4j.MDC;
import org.springframework.http.HttpEntity;
import org.springframework.http.HttpHeaders;
import org.springframework.http.MediaType;
import org.springframework.stereotype.Component;
import org.springframework.web.client.RestTemplate;

import java.util.Map;

/**
 * @ClassName: HttpUnirestUtil
 * @Author zhangwujie
 * @Date 2022/8/22 8:53 下午
 * @Description:
 */
@Slf4j
@Component
public class HttpUnirestUtil {

    private static final Gson gson = new Gson();

    public String doJsonPostFromMap(String url, Map<String, Object> bodyMap) throws Exception {
        // 2.请求参数JSON格式
        String bodyString = gson.toJson(bodyMap);
        log.info("HttpUnirestUtil doJsonPostFromMap url={} reqBody={}", url, bodyString);
        HttpResponse<JsonNode> response = Unirest.post(url)
                .header("Content-Type", "application/json")
                .header(TraceInterceptor.TRACE_ID, MDC.get(TraceInterceptor.TRACE_ID))
                .body(bodyString)
                .asJson();
        String respBody = response.getBody().toString();
        int httpStatus = response.getStatus();
        log.info("HttpUnirestUtil doJsonPostFromMap httpStatus={} respBody={}", httpStatus, respBody);
        return respBody;
    }
}

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posted @ 2022-08-23 14:46 zwjvzwj 阅读(164) 评论(0) 编辑收藏举报

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java springboot 初体验（九）对接http请求