get请求

get无参请求

public static void main(String[] args) {
        //创建htppClient对象
        CloseableHttpClient httpClient = HttpClients.createDefault();

        //创建HttpGet对象，设置url访问地址
        HttpGet HttpGet = new HttpGet("http://wwww.wuquejs.cn");
        CloseableHttpResponse response = null;
        try {
            //使用HttpClient发起请求，获取response
            response = httpClient.execute(HttpGet);
            //解析响应
            if (response.getStatusLine().getStatusCode() == 200) {

                HttpEntity entity = response.getEntity();
                //打印输出请求得到的内容
                System.out.println( EntityUtils.toString(entity));
            }

        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            //关闭资源
            try {
                response.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
            try {
                httpClient.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }

get有参请求

public static void main(String[] args) throws Exception {
        //创建htppClient对象
        CloseableHttpClient httpClient = HttpClients.createDefault();
        //创建URIBuilder
        URIBuilder uriBuilder = new URIBuilder("Http://www.wuquejs.cn");

        //设置参数,以键值对的方式存入uriBuilder
        uriBuilder.setParameter("keys", "java");

        //创建HttpGet对象，设置url访问地址
        HttpGet httpGet = new HttpGet(uriBuilder.build());

        //打印输出完成的请求url
        System.out.println("发起请求的信息" + httpGet);

        CloseableHttpResponse response = null;

        try {
            //使用HttpClient发起请求，获取response
            response = httpClient.execute(httpGet);

            //解析响应
            if (response.getStatusLine().getStatusCode() == 200) {
                HttpEntity entity = response.getEntity();
                //打印输出请求得到的内容
                System.out.println( EntityUtils.toString(entity));
            }

        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            //关闭response
            try {
                response.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
            try {
                httpClient.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }

get请求的有参可以直接把请求的参数拼接到url后面

post请求

post无参请求

public static void main(String[] args) {
        //创建htppClient对象
        CloseableHttpClient httpClient = HttpClients.createDefault();

        //创建HttpPost对象，设置url访问地址
        HttpPost HttpPost = new HttpPost("http://www.wuquejs.cn");
        CloseableHttpResponse response = null;
        try {
            //使用HttpClient发起请求，获取response
            response = httpClient.execute(HttpPost);
            //解析响应
            if (response.getStatusLine().getStatusCode() == 200) {

                HttpEntity entity = response.getEntity();
                //打印输出请求得到的内容
                System.out.println( EntityUtils.toString(entity));
            }

        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            //关闭response
            try {
                response.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
            try {
                httpClient.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }

post有参请求

public static void main(String[] args) throws Exception {
        //创建htppClient对象
        CloseableHttpClient httpClient = HttpClients.createDefault();

        //创建HttpGet对象，设置url访问地址
        HttpPost httpPost = new HttpPost("http://www.wuquejs.cn");

        //生命List集合，封装表单中的参数
        List<NameValuePair> params = new ArrayList<NameValuePair>();
        //设置请求地址:http://www.wuquejs.cn/search?keys=Java
        params.add(new BasicNameValuePair("keys", "java"));

        //创建表单的Entity对象
        //第一个参数就是封装好的表单数据，第二个参数就是编码
        UrlEncodedFormEntity formEntity = new UrlEncodedFormEntity(params, "utf-8");
        //设置表单的Entity对象到Post请求中
        httpPost.setEntity(formEntity);

        CloseableHttpResponse response = null;

        try {
            //使用HttpClient发起请求，获取response
            response = httpClient.execute(httpPost);

            //解析响应
            if (response.getStatusLine().getStatusCode() == 200) {
                HttpEntity entity = response.getEntity();
                //打印输出请求得到的内容
                System.out.println( EntityUtils.toString(entity));
            }

        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            //关闭response
            try {
                response.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
            try {
                httpClient.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }