java http请求怎么设置编码类型为utf-8

你可以在请求头中设置编码类型为utf-8，具体方法如下：

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.nio.charset.StandardCharsets;

public class HttpTest {
    public static void main(String[] args) throws Exception {
        String urlStr = "http://www.example.com";
        URL url = new URL(urlStr);
        HttpURLConnection conn = (HttpURLConnection) url.openConnection();
        conn.setRequestMethod("GET");
        conn.setRequestProperty("Accept-Charset", "utf-8");
        conn.setDoOutput(true);

        BufferedReader br = new BufferedReader(new InputStreamReader(conn.getInputStream(), StandardCharsets.UTF_8));
        String line;
        while ((line = br.readLine()) != null) {
            System.out.println(line);
        }
        br.close();
    }
}

在请求头中设置 "Accept-Charset" 为 "utf-8" 即可。