java如何发送post请求
时间: 2023-03-25 18:01:05 浏览: 68
Java可以使用HttpURLConnection或者HttpClient发送POST请求。以下是使用HttpURLConnection发送POST请求的示例代码:
```
import java.net.HttpURLConnection;
import java.net.URL;
import java.io.OutputStream;
import java.io.BufferedReader;
import java.io.InputStreamReader;
public class HttpPostExample {
public static void main(String[] args) throws Exception {
String url = "http://example.com/api";
String data = "param1=value1¶m2=value2";
URL obj = new URL(url);
HttpURLConnection con = (HttpURLConnection) obj.openConnection();
// 设置请求方法为POST
con.setRequestMethod("POST");
// 设置请求头
con.setRequestProperty("User-Agent", "Mozilla/5.");
// 向服务器发送数据
con.setDoOutput(true);
OutputStream os = con.getOutputStream();
os.write(data.getBytes());
os.flush();
os.close();
// 获取服务器响应
BufferedReader in = new BufferedReader(new InputStreamReader(con.getInputStream()));
String inputLine;
StringBuffer response = new StringBuffer();
while ((inputLine = in.readLine()) != null) {
response.append(inputLine);
}
in.close();
// 打印服务器响应
System.out.println(response.toString());
}
}
```