java爬虫之使用HttpClient模拟浏览器发送请求方法详解

<dependency>
  <groupId>org.apache.httpcomponents</groupId>
  <artifactId>httpclient</artifactId>
  <version>4.5.2</version>
</dependency>

//1. 打开浏览器 创建httpclient对象
CloseableHttpClient httpClient = HttpClients.createDefault();
//2. 输入网址
HttpGet httpGet = new HttpGet("http://www.baidu.com");
//3. 发送请求
CloseableHttpResponse httpResponse = httpClient.execute(httpGet);
//4. 响应结果
HttpEntity httpEntity = httpResponse.getEntity();
//5. 解析结果
String result = EntityUtils.toString(httpEntity, "utf-8");
System.out.println(result);

<dependency>
  <groupId>org.apache.httpcomponents</groupId>
  <artifactId>httpclient</artifactId>
  <version>4.5.2</version>
</dependency>

public static void main(String[] args) throws IOException {
  //1. 打开浏览器 创建httpclient对象
  CloseableHttpClient httpClient = HttpClients.createDefault();
  //2. 输入网址
  HttpGet httpGet = new HttpGet("http://www.baidu.com");
  //3. 发送请求
  CloseableHttpResponse httpResponse = httpClient.execute(httpGet);
  //4. 响应结果
  HttpEntity httpEntity = httpResponse.getEntity();
  //5. 解析结果
  String result = EntityUtils.toString(httpEntity, "utf-8");
  System.out.println(result);
}