webservice 调用

最新推荐文章于 2024-11-01 08:34:12 发布

原创最新推荐文章于 2024-11-01 08:34:12 发布 · 174 阅读

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#webservice #java

本文介绍如何使用Apache HttpClient 4.5.8版本进行POST请求，包括设置请求头、处理Cookie、发送JSON数据及解析响应。通过具体代码展示了如何与数据枢纽服务交互，实现数据查询。

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依赖
  <!--httpclient-->
        <dependency>
            <groupId>org.apache.httpcomponents</groupId>
            <artifactId>httpclient</artifactId>
            <version>4.5.8</version>
        </dependency>
        代码：
package com.jkys.crm.utils;

import com.alibaba.fastjson.JSON;
import org.apache.http.HttpEntity;
import org.apache.http.client.methods.CloseableHttpResponse;
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.Logger;
import org.slf4j.LoggerFactory;

import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletRequest;
import java.io.IOException;
import java.nio.charset.StandardCharsets;
import java.util.Locale;
import java.util.Map;
import java.util.ResourceBundle;

public class DataHubServiceUtil {
    /***
     * datahubService.
     *
     */
    private final static Logger logger = LoggerFactory.getLogger(DataHubServiceUtil.class);

    public static String queryAllDataMap(Map<String,Object> jsonMap, Long dataHubId, HttpServletRequest request) throws IOException {
        //获取web路劲下的配置（访问url）
        ResourceBundle bundle=ResourceBundle.getBundle("application", Locale.CHINA);
        String url = bundle.getString("drugStoreUrl")+dataHubId;
        //httpclient
        CloseableHttpClient httpClient = HttpClientBuilder.create().build();
        // 创建Post请求
        HttpPost httpPost = new HttpPost(url);
        //请求Content-Type:内容体
        httpPost.setHeader("Content-Type", "application/json;charset=utf8");
        httpPost.setHeader("Referer", request.getHeader("Referer"));
        //添加cookie 形如Cookie: crm_new_cheat_user=858; _JKYS_DAILY_E_SESSION_ID=b7e0f2a876b4ff060a5c737ab2ace157cc815c37; _JKYS_E_SESSION_ID=28d07d3a07432a604c795a727b5f11de4a45851e; JSESSIONID=0FFB53AB2E7009D898FEB398E3788D2F
        Cookie[] cookies = request.getCookies();
        StringBuffer sb = new StringBuffer();
        for(int i=0;i<cookies.length;i++){
            sb.append(cookies[i].getName()+"="+cookies[i].getValue());
            if(i !=cookies.length-1){
                sb.append(";");
            }
        }
        httpPost.addHeader("Cookie",sb.toString());
        logger.info("获取到cookie:"+sb.toString() );
        //将map转化成json字符串
        String jsonString = JSON.toJSONString(jsonMap);
        //添加页面参数
        StringEntity entity = new StringEntity(jsonString, "UTF-8");
        // post请求是将参数放在请求体里面传过去的;这里将entity放入post请求体中
        httpPost.setEntity(entity);
        // 响应模型(由客户端执行(发送)Post请求)
        CloseableHttpResponse response = httpClient.execute(httpPost);
        // 从响应模型中获取响应实体
        HttpEntity responseEntity = response.getEntity();
        logger.info("响应状态为:" + response.getStatusLine());
        if (responseEntity != null) {
            logger.info("响应内容长度为:" + responseEntity.getContentLength());
            String responseStr = EntityUtils.toString(responseEntity, StandardCharsets.UTF_8);
            logger.info("响应内容为:" + responseStr);
            return responseStr;
        }
        return null;
    }
}

在这里插入代码片