Java 使用Httpget发送请求设置哪些使用返回结果不乱码

在Java中使用Http.get()发送请求，可以通过设置请求头的Content-Type属性来指定返回结果的字符编码，从而避免乱码问题。常见的字符编码包括UTF-8、GBK等。

以下是设置Content-Type为UTF-8的示例代码：

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;

public class HttpGetExample {
    public static void main(String[] args) throws IOException {
        URL url = new URL("https://example.com/api/endpoint");
        HttpURLConnection connection = (HttpURLConnection) url.openConnection();
        connection.setRequestMethod("GET");

        // 设置请求头的Content-Type属性为UTF-8
        connection.setRequestProperty("Content-Type", "application/json; charset=UTF-8");

        int responseCode = connection.getResponseCode();
        if (responseCode == HttpURLConnection.HTTP_OK) {
            BufferedReader reader = new BufferedReader(new InputStreamReader(connection.getInputStream(), "UTF-8"));
            String line;
            StringBuilder response = new StringBuilder();
            while ((line = reader.readLine()) != null) {
                response.append(line);
            }
            reader.close();

            System.out.println("Response: " + response.toString());
        } else {
            System.out.println("HTTP GET request failed with response code: " + responseCode);
        }

        connection.disconnect();
    }
}

在上述示例中，通过设置请求头的Content-Type属性为"application/json; charset=UTF-8"来指定返回结果的字符编码为UTF-8。在获取输入流时，使用InputStreamReader的构造函数指定字符编码为UTF-8，确保返回结果不乱码