HttpClient模拟x-www-form-urlencoded格式的form表单提交

form表单提交的时候，是x-www-form-urlencoded 格式，此时如果用HttpClient类去做，代码应该是这样：

import com.gewara.util.HttpResult;
import org.apache.http.NameValuePair;
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;

// 组织参数
TreeMap<String, String> treeMapParams = new TreeMap<>();
        treeMapParams.put("username", "xx");
        List<NameValuePair> nameValuePairList = OpenapiParamsUtil.buildNameValuePairList(treeMapParams);

// 设置参数
HttpPost httpPost = new HttpPost(HttpUtil.LOCK_COUPON_URL);
        UrlEncodedFormEntity urlEncodedFormEntity = new UrlEncodedFormEntity(nameValuePairList, "UTF-8");
        httpPost.setEntity(urlEncodedFormEntity);

HttpResult httpResult = null;
        try(
                CloseableHttpClient httpClient = HttpClients.createDefault();
                CloseableHttpResponse response = httpClient.execute(httpPost);
        ){
            httpResult = HttpUtil.dealResponse(response);
            String result = httpResult.getResponse();
            logger.info("result ============= " + result);
            return result;
        } catch (Exception e){
            logger.error(e.getMessage() ,e);
        }

 添加依赖jar:

<dependency>
     <groupId>commons-httpclient</groupId>
     <artifactId>commons-httpclient</artifactId>
     <version>3.1</version>
</dependency>

end.