在Java中发送GET请求并传递header参数,可以使用`java.net.HttpURLConnection`类。下面是一个示例代码:
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
public class Main {
public static void main(String[] args) {
try {
// 创建URL对象
URL url = new URL("http://example.com/api?param1=value1¶m2=value2");
// 打开连接
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
// 设置请求方法为GET
connection.setRequestMethod("GET");
// 设置header参数
connection.setRequestProperty("Header1", "Value1");
connection.setRequestProperty("Header2", "Value2");
// 获取响应代码
int responseCode = connection.getResponseCode();
// 读取响应内容
BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(connection.getInputStream()));
String line;
StringBuilder response = new StringBuilder();
while ((line = bufferedReader.readLine()) != null) {
response.append(line);
}
bufferedReader.close();
// 打印响应内容
System.out.println(response.toString());
// 关闭连接
connection.disconnect();
} catch (Exception e) {
e.printStackTrace();
}
}
}
在上述代码中,通过`setRequestProperty`方法设置了header参数,然后通过`getInputStream`方法获取响应内容。注意,需要将`http://example.com/api?param1=value1¶m2=value2`替换为实际的请求URL,并根据需要设置自定义的header参数。