http post请求

小咪咪 2022-08-20 14:09 195阅读 0赞

**http post请求**

**代码**

import java.io.IOException;
    import java.util.ArrayList;
    import java.util.List;
    
    import org.apache.http.HttpEntity;
    import org.apache.http.HttpStatus;
    import org.apache.http.NameValuePair;
    import org.apache.http.client.config.RequestConfig;
    import org.apache.http.client.entity.UrlEncodedFormEntity;
    import org.apache.http.client.methods.CloseableHttpResponse;
    import org.apache.http.client.methods.HttpPost;
    import org.apache.http.impl.client.CloseableHttpClient;
    import org.apache.http.impl.client.HttpClients;
    import org.apache.http.message.BasicNameValuePair;
    import org.apache.http.util.EntityUtils;
     
    /**
     * 
     * POST接口服务的JAVA示例
     * 
     */
    public class HttpPostApiInvoker {
     
        private final static String URL = "http://test/url";					// 请求url
        private final static String REQUEST_CHARSET     =   "UTF-8";
        private final static String RESPONSE_CHARSET    =   "UTF-8";
        private final static int    CONNECT_TIMEOUT     =   5000;               // 调用连接超时时间
        private final static int    REQUEST_TIMEOUT     =   10000;              // 调用获取数据超时时间
     
        public static void main(String[] args) throws Exception{
        	HttpPostApiInvoker httpPostApiInvoker = new HttpPostApiInvoker();
            List<NameValuePair>  parameterList = httpPostApiInvoker.prepareParameter();
            String result = httpPostApiInvoker.invoke(parameterList);
            System.out.println(result);
        }
     
        /***
         * 准备业务参数
         * @return
         */
        private List<NameValuePair> prepareParameter(){
            List<NameValuePair> parameterList = new ArrayList<>();
            parameterList.add(new BasicNameValuePair("name", "xxxx"));
            parameterList.add(new BasicNameValuePair("password", "xxxxxxxxx"));
            return parameterList;
        }
     
        /***
         * 没有使用长连接
         * @param parameterList
         * @return  JSON格式的字符串
         * @throws IOException
         */
        private String invoke(List<NameValuePair> parameterList) throws IOException {
            HttpPost httpPost = null;
            String result = "";
            try {
     
                httpPost = new HttpPost(URL);
     
                //设置超时时间
                RequestConfig requestConfig = RequestConfig.custom()
                        .setConnectTimeout(CONNECT_TIMEOUT)
                        .setSocketTimeout(REQUEST_TIMEOUT)
                        .build();
                httpPost.setConfig(requestConfig);
     
                CloseableHttpClient httpClient = HttpClients.createDefault();
                httpPost.setEntity(new UrlEncodedFormEntity(parameterList, REQUEST_CHARSET));
     
                CloseableHttpResponse httpResponse = httpClient.execute(httpPost);
                HttpEntity httpEntity = httpResponse.getEntity();
     
                //返回值不是200，进行错误处理
                if(HttpStatus.SC_OK != httpResponse.getStatusLine().getStatusCode()){
     
                    //相关处理
                    if(null != httpPost) {
                        httpPost.abort();
                    }
                    return result;
                }
     
                //获取结果
                result = EntityUtils.toString(httpEntity, RESPONSE_CHARSET);
     
            }catch(Exception e){
                if(null != httpPost){
                    httpPost.abort();
                }
                throw e;
            }
            return result;
        }
    }

项目依赖

<dependency>
     <groupId>org.apache.commons</groupId>
     <artifactId>commons-lang3</artifactId>
     <version>3.3.2 </version>
    </dependency>
    
    <dependency>
     <groupId>org.apache.httpcomponents</groupId>
     <artifactId>httpclient</artifactId>
     <version> 4.3.6</version>
    </dependency>
    
    <dependency>
     <groupId>org.apache.httpcomponents</groupId>
     <artifactId>httpcore</artifactId>
     <version>4.4</version>
    </dependency>