SpringBoot2.0使用RestTemplateTest請求API

import com.alibaba.fastjson.JSONObject;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.http.HttpEntity;
import org.springframework.http.HttpHeaders;
import org.springframework.http.MediaType;
import org.springframework.web.client.RestTemplate;

import java.util.Map;

/**
 * SpringBoot2.0使用RestTemplateTest請求API
 **/
public class RestTemplateTest {

        private static final Logger logger  = LoggerFactory.getLogger(RestTemplateTest.class);

        @Autowired
        private RestTemplate restTemplate;

        @Value("${xxx.xxx}")
        private String accountNo;
        @Value("${xxx.xxx}")
        private String getUrl;
        @Value("${xxx.xxx}")
        private String postUrl;

        private static final String AND_MARK = "&";
        private static final String EQUAL_MARK = "=";


        /**
         * get請求
         * @param parameterMap 發送內容
         */
        public JSONObject get(Map<String,String> parameterMap){
            long  beginTime = System.currentTimeMillis();
            String result;
            try {
                String paramString = getParams(parameterMap);
                String sendUrl = getUrl + "?accountNo=" + accountNo + paramString;
                logger.info("發送地址:{}",sendUrl);
                result = restTemplate.getForObject(sendUrl, String.class);
                logger.info("接收到結果:{}", result);
            }finally {
                long endTime = System.currentTimeMillis();
                logger.info("開始時間:{},結束時間:{},此次調用時長爲(毫秒):{}",beginTime,endTime,endTime-beginTime);
            }
            return JSONObject.parseObject(result);
        }

        /**
         * post請求
         * @param contentJson 發送內容
         */
        public JSONObject post(JSONObject contentJson){
            long  beginTime = System.currentTimeMillis();
            try {
                String sendUrl = postUrl + "?accountNo=" + accountNo;
                logger.info("發送地址:{}",sendUrl);
                logger.info("發送內容:{}",JSONObject.toJSONString(contentJson));
                String result = restTemplate.postForObject(sendUrl, getJsonHttpEntity(contentJson), String.class);
                logger.info("接收到結果:{}",result);
                return JSONObject.parseObject(result);
            }finally {
                long endTime = System.currentTimeMillis();
                logger.info("開始時間:{},結束時間:{},此次調用時長爲(毫秒):{}",beginTime,endTime,endTime-beginTime);
            }
        }

        /**
         * 獲取json請求體
         * @param contentJson 請求內容
         * @return HttpEntity
         */
        private HttpEntity getJsonHttpEntity(JSONObject contentJson){
            HttpHeaders headers = new HttpHeaders();
            //接收字符集
            headers.set("Accept-Charset", "utf-8");
            //內容類型
            headers.set("Content-type", MediaType.APPLICATION_JSON_UTF8_VALUE);
            return new HttpEntity<>(contentJson, headers);
        }

        /**
         * 轉換爲get方式的參數
         * @param param map類型的參數
         * @return String
         */
        private static String getParams(Map<String, String> param) {
            StringBuilder stringBuilder = new StringBuilder();
            for (Map.Entry<String, String> entry : param.entrySet()) {
                stringBuilder.append(AND_MARK).append(entry.getKey()).append(EQUAL_MARK).append(entry.getValue());
            }
            return stringBuilder.toString();
    }

}