java程序 替代 curl实现案例

Java程序可以替代curl实现HTTP请求。使用Java的HttpURLConnection类可以发送GET、POST、PUT等HTTP请求，并获取响应。下面是一个简单的Java程序实现curl的PUT请求案例的示例代码：

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

public class CurlReplacementExample {
    public static void main(String[] args) {
        try {
            String url = "http://example.com";
            URL obj = new URL(url);
            HttpURLConnection con = (HttpURLConnection) obj.openConnection();

            // 设置请求方法为PUT
            con.setRequestMethod("PUT");

            // 添加请求头
            con.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");

            // 设置请求体
            String urlParameters = "hello=world";

            // 发送请求
            con.setDoOutput(true);
            DataOutputStream wr = new DataOutputStream(con.getOutputStream());
            wr.writeBytes(urlParameters);
            wr.flush();
            wr.close();

            // 获取响应
            int responseCode = con.getResponseCode();
            BufferedReader in = new BufferedReader(new InputStreamReader(con.getInputStream()));
            String inputLine;
            StringBuilder response = new StringBuilder();
            while ((inputLine = in.readLine()) != null) {
                response.append(inputLine);
            }
            in.close();

            // 打印响应结果
            System.out.println("Response Code: " + responseCode);
            System.out.println("Response: " + response.toString());
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}