http请求

1.创建httpclient对象

2.创建post方式请求对象

3.装填参数

4.执行请求操作，并拿到结果集（同步阻塞）

5.获取结果集

6.按指定编码转换结果集实体为String类型

public static void search() throws IOException {
    //创建httpclient对象
    CloseableHttpClient httpclient = HttpClients.createDefault();
    //创建post方式请求对象
    HttpPost httpPost = new HttpPost("http://172.16.177.99:8088/MyStudy/edit.do");
    //装填参数
    List<NameValuePair> nvps = new ArrayList<NameValuePair>();
    nvps.add(new BasicNameValuePair("id", "1"));
    UrlEncodedFormEntity urlEncodedFormEntity = new UrlEncodedFormEntity(nvps, Consts.UTF_8);
    httpPost.setEntity(urlEncodedFormEntity);
    //执行请求操作，并拿到结果（同步阻塞）
    CloseableHttpResponse response = httpclient.execute(httpPost);
    //获取结果实体
    HttpEntity entity = response.getEntity();
    //按指定编码转换结果实体为String类型
    if(entity!=null){
        String resultString = EntityUtils.toString(entity,Consts.UTF_8);
    }
    response.close();
    httpclient.close();

}

public static String sentHttpPostRequestToTransmit(RequestHeader requestHeader, Map<String, String> map) throws IOException {

    Header header1 =new BasicHeader("appNo",requestHeader.getAppNo());
    Header header2=new BasicHeader("serviceNo",requestHeader.getServiceNo());
    Header [] headers ={header1,header2};
    //1.创建httpclient对象
    CloseableHttpClient httpclient = HttpClients.createDefault();
    String url ="http://172.16.177.99:8088/MyStudy/edit.do";
    try {
        //2.创建post方式请求对象
        HttpPost httpPost = new HttpPost(url);
        //3.装填参数
        List<NameValuePair> nvps = new ArrayList<NameValuePair>();
        //设置要提交的数据
        for (Map.Entry<String, String> entry : map.entrySet()) {
            nvps.add(new BasicNameValuePair(entry.getKey(), entry.getValue()));
        }
        UrlEncodedFormEntity urlEncodedFormEntity = new UrlEncodedFormEntity(nvps, Consts.UTF_8);
        httpPost.setHeaders(headers);
        httpPost.setEntity(urlEncodedFormEntity);
        HttpEntity entity;
        //4.执行请求操作，并拿到结果（同步阻塞）
        CloseableHttpResponse response = httpclient.execute(httpPost);
        try {
            //5.获取结果实体
            entity = response.getEntity();
            //6.按指定编码转换结果实体为String类型
            return entity != null ? EntityUtils.toString(entity,Consts.UTF_8) : null; //返回字符串
        } finally {
            response.close();//关闭响应
        }

    } finally {
        httpclient.close(); //关闭连接
    }
}