urlConnection.setRequestMethod("GET"); urlConnection.setRequestProperty("User-Agent", "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.110 Safari/537.3");
时间: 2024-04-07 10:30:49 浏览: 14
这是Java中使用HttpURLConnection发送GET请求时设置的请求方法和请求头信息。其中,setRequestMethod("GET")表示发送GET请求,setRequestProperty("User-Agent", "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.110 Safari/537.3")表示设置请求头中的User-Agent字段,用于伪装客户端的浏览器类型。这样设置可以模拟浏览器发送请求,避免被服务器识别为爬虫或机器人而被拒绝访问。
相关问题
java修改user-agent_设置随机 User-Agent
可以使用Java的URLConnection类来设置User-Agent,并且可以通过随机生成User-Agent来实现随机化。
以下是一个示例代码:
```java
import java.io.IOException;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.ArrayList;
import java.util.List;
import java.util.Random;
public class Main {
private static final List<String> USER_AGENTS = new ArrayList<>();
static {
// 添加一些常见的User-Agent
USER_AGENTS.add("Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.110 Safari/537.36");
USER_AGENTS.add("Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/46.0.2486.0 Safari/537.36 Edge/13.10586");
USER_AGENTS.add("Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/42.0.2311.135 Safari/537.36 Edge/12.246");
}
public static void main(String[] args) throws IOException {
URL url = new URL("https://www.example.com");
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
connection.setRequestMethod("GET");
connection.setRequestProperty("User-Agent", getRandomUserAgent());
connection.connect();
// 处理响应...
}
private static String getRandomUserAgent() {
Random random = new Random();
int index = random.nextInt(USER_AGENTS.size());
return USER_AGENTS.get(index);
}
}
```
在该示例中,我们在静态块中添加了一些常见的User-Agent,然后在获取连接时,随机选择一个User-Agent,并设置到连接的请求头中。这样就可以实现随机化User-Agent了。
java 怎么调用 https://oapi.dingtalk.com/topapi/edu/dept/list
Java调用HTTPS接口可以使用Java的HttpURLConnection和HttpsURLConnection类来实现。以下是调用HTTPS接口的示例代码:
```java
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.net.URL;
import java.net.URLConnection;
public class HttpsURLConnectionDemo {
public static void main(String[] args) {
try {
// 创建URL对象
URL url = new URL("https://oapi.dingtalk.com/topapi/edu/dept/list");
// 创建HttpsURLConnection对象
HttpsURLConnection httpsConn = (HttpsURLConnection) url.openConnection();
// 设置请求方法
httpsConn.setRequestMethod("POST");
// 设置请求头
httpsConn.setRequestProperty("Content-Type", "application/json;charset=UTF-8");
// 设置超时时间
httpsConn.setConnectTimeout(5000);
httpsConn.setReadTimeout(5000);
// 开启输出流,向服务器写入数据
httpsConn.setDoOutput(true);
OutputStreamWriter out = new OutputStreamWriter(httpsConn.getOutputStream(), "UTF-8");
out.write("你的请求参数");
out.flush();
out.close();
// 获取响应结果
BufferedReader in = new BufferedReader(new InputStreamReader(httpsConn.getInputStream(), "UTF-8"));
StringBuilder result = new StringBuilder();
String line;
while ((line = in.readLine()) != null) {
result.append(line);
}
in.close();
// 输出响应结果
System.out.println(result);
} catch (Exception e) {
e.printStackTrace();
}
}
}
```
其中,需要将"你的请求参数"替换成实际的请求参数。此示例仅供参考,具体实现需根据实际情况而定。