Java后端如何实现调用url
时间: 2023-06-04 08:04:54 浏览: 52
Java后端调用URL可以使用Java中自带的java.net包中的HttpURLConnection类实现。以下是一个简单的示例代码:
```
import java.net.HttpURLConnection;
import java.net.URL;
import java.io.BufferedReader;
import java.io.InputStreamReader;
public class URLConnectionExample {
public static void main(String[] args) {
try {
URL url = new URL("http://www.example.com/api");
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
conn.setRequestMethod("GET");
conn.setConnectTimeout(5000);
conn.setReadTimeout(5000);
BufferedReader in = new BufferedReader(new InputStreamReader(conn.getInputStream()));
String inputLine;
StringBuffer response = new StringBuffer();
while ((inputLine = in.readLine()) != null) {
response.append(inputLine);
}
in.close();
System.out.println(response.toString());
} catch (Exception e) {
e.printStackTrace();
}
}
}
```
这是一个简单的GET请求示例,改变HTTP请求方法、参数等均可在HttpURLConnection类中找到对应的方法进行更改。