使用jar包：

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

代码：

try {
            String postURL = "http://*.*.*.*:8080/cjs/ad";
            PostMethod postMethod = null;
            postMethod = new PostMethod(postURL) ;　　　　　　　//添加请求头数据
            postMethod.setRequestHeader("Content-Type", "application/x-www-form-urlencoded;charset=utf-8") ;
            //参数设置，需要注意的就是里边不能传NULL，要传空字符串
            NameValuePair[] data = {
                    new NameValuePair("_ArgStr1","*"),                    new NameValuePair("_ArgStr2","*")
            };

            postMethod.setRequestBody(data);

            org.apache.commons.httpclient.HttpClient httpClient = new org.apache.commons.httpclient.HttpClient();
            int response = httpClient.executeMethod(postMethod); // 执行POST方法
            String result = postMethod.getResponseBodyAsString() ;
            System.out.println(response);
            System.out.println(result);
        } catch (Exception e) {
            // logger.info("请求异常"+e.getMessage(),e);
            throw new RuntimeException(e.getMessage());
        }