<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:///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:///"); 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:///");
        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:///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>