帮我写一个Java的http请求工具类，包含Post和Get请求，并且支持传入header，也可以不传header等西悉尼

好的，我可以帮您解决。这里是一个示例Java的http请求工具类，它可以支持Post和Get请求，并且可以传入header或不传入header：

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

public class HttpUtils {

    public static String sendGet(String url, String headers) throws Exception {
        URL obj = new URL(url);
        HttpURLConnection con = (HttpURLConnection) obj.openConnection();

        // 设置请求头
        if (headers != null && headers.trim().length() > 0) {
            String[] headerArray = headers.split("\n");
            for (String header : headerArray) {
                String[] parts = header.split(":");
                con.setRequestProperty(parts[0].trim(), parts[1].trim());
            }
        }

        // 发送GET请求
        con.setRequestMethod("GET");

        BufferedReader in = new BufferedReader(
                new InputStreamReader(con.getInputStream()));
        String inputLine;
        StringBuffer response = new StringBuffer();

        while ((inputLine = in.readLine()) != null) {
            response.append(inputLine);
        }
        in.close();

        return response.toString();
    }

    // 发送Post请求
    public static String sendPost(String url, String headers, String requestPayload) throws Exception {
        URL obj = new URL(url);
        HttpURLConnection con = (HttpURLConnection) obj.openConnection();

        // 设置请求头
        if (headers != null && headers.trim().length() > 0) {
            String[] headerArray = headers.split("\n");
            for (String header : headerArray) {
                String[] parts = header.split(":");
                con.setRequestProperty(parts[0].trim(), parts[1].trim());
            }
        }

        // 发送POST请求
        con.setRequestMethod("POST");
        con.setDoOutput(true);
        con.getOutputStream().write(requestPayload.getBytes("UTF-8"));

        BufferedReader in = new BufferedReader(
                new InputStreamReader(con.getInputStream()));
        String inputLine;
        StringBuffer response = new StringBuffer();

        while ((inputLine = in.readLine()) != null) {
            response.append(inputLine);
        }
        in.close();

        return response.toString();
    }
}

使用示例：

// 发送GET请求
String url = "http://www.example.com/getData";
String headers = "Content-Type: application/json\nAuthorization: Bearer abcdefg";
String response = HttpUtils.sendGet(url, headers);

// 发送POST请求
String url = "http://www.example.com/postData";
String headers = "Content-Type: application/json\nAuthorization: Bearer abcdefg";
String requestPayload = "{\"key1\":\"value1\",\"key2\":\"value2\"}";
String response = HttpUtils.sendPost(url, headers, requestPayload);

请注意，此示例仅供参考。在实际编写代码过程中，还需要考虑错误处理、性能优化等方面的问题。