<dependency> <groupId>org.apache.httpcomponents</groupId> <artifactId>httpclient</artifactId> <version>4.3.5</version> </dependency>pom.xml配置文件
//不带参数的get方法 public class DoGET { public static void main(String[] args) throws Exception {
//带参数的post方法 public class DoPOSTParam { public static void main(String[] args) throws Exception { // 创建Httpclient对象 CloseableHttpClient httpclient = HttpClients.createDefault(); // 创建http POST请求 HttpPost httpPost = new HttpPost("http://www.oschina.net/search"); // 设置2个post参数,一个是scope、一个是q List<NameValuePair> parameters = new ArrayList<NameValuePair>(0); parameters.add(new BasicNameValuePair("scope", "project")); parameters.add(new BasicNameValuePair("q", "java")); // 构造一个form表单式的实体 UrlEncodedFormEntity formEntity = new UrlEncodedFormEntity(parameters,"UTF-8"); // 将请求实体设置到httpPost对象中 httpPost.setEntity(formEntity); CloseableHttpResponse response = null; try { // 执行请求 response = httpclient.execute(httpPost); // 判断返回状态是否为200 if (response.getStatusLine().getStatusCode() == 200) { String content = EntityUtils.toString(response.getEntity(), "UTF-8"); System.out.println(content); } } finally { if (response != null) { response.close(); } httpclient.close(); } } }
// 创建Httpclient对象 CloseableHttpClient httpclient = HttpClients.createDefault(); // 创建http GET请求 HttpGet httpGet = new HttpGet("http://www.baidu.com/"); CloseableHttpResponse response = null; try { // 执行请求 response = httpclient.execute(httpGet); // 判断返回状态是否为200 if (response.getStatusLine().getStatusCode() == 200) { String content = EntityUtils.toString(response.getEntity(), "UTF-8"); System.out.println("内容长度:"+content.length()); } } finally { if (response != null) { response.close(); } httpclient.close(); } }}
//不带参数的post方法 public class DoPOST { public static void main(String[] args) throws Exception { // 创建Httpclient对象 CloseableHttpClient httpclient = HttpClients.createDefault(); // 创建http POST请求 HttpPost httpPost = new HttpPost("http://www.oschina.net/"); CloseableHttpResponse response = null; try { // 执行请求 response = httpclient.execute(httpPost); // 判断返回状态是否为200 if (response.getStatusLine().getStatusCode() == 200) { String content = EntityUtils.toString(response.getEntity(), "UTF-8"); System.out.println(content); } } finally { if (response != null) { response.close(); } httpclient.close(); } } }
//简单的带参数get方法 public class DoGETParam { public static void main(String[] args) throws Exception { // 创建Httpclient对象 CloseableHttpClient httpclient = HttpClients.createDefault(); // 定义请求的参数 URI uri = new URIBuilder("http://www.baidu.com/s").setParameter("wd", "java").build(); System.out.println(uri); // 创建http GET请求 HttpGet httpGet = new HttpGet(uri); CloseableHttpResponse response = null; try { // 执行请求 response = httpclient.execute(httpGet); // 判断返回状态是否为200 if (response.getStatusLine().getStatusCode() == 200) { String content = EntityUtils.toString(response.getEntity(), "UTF-8"); System.out.println(content); } } finally { if (response != null) { response.close(); } httpclient.close(); } } }
<dependency> <groupId>org.apache.httpcomponents</groupId> <artifactId>httpclient</artifactId> <version>4.3.5</version> </dependency>
<dependency> <groupId>org.apache.httpcomponents</groupId> <artifactId>httpclient</artifactId> <version>4.3.5</version> </dependency>