java 腾讯云回调实现

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;

@WebServlet("/callback")
public class CallbackServlet extends HttpServlet {
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        // 获取回调参数
        Map<String, String> params = new HashMap<>();
        for (String key : request.getParameterMap().keySet()) {
            params.put(key, request.getParameter(key));
        }

        // 验证回调消息（示例代码，具体验证逻辑需参考腾讯云文档）
        if (verifyCallback(params)) {
            // 处理业务逻辑
            handleBusinessLogic(params);

            // 返回成功响应
            response.setStatus(HttpServletResponse.SC_OK);
            response.getWriter().write("success");
        } else {
            // 验证失败，返回错误响应
            response.setStatus(HttpServletResponse.SC_FORBIDDEN);
            response.getWriter().write("invalid request");
        }
    }

    private boolean verifyCallback(Map<String, String> params) {
        // 实现具体的验证逻辑，例如签名验证
        // 这里只是一个示例，具体实现需要参考腾讯云的官方文档
        return true;
    }

    private void handleBusinessLogic(Map<String, String> params) {
        // 根据回调参数处理业务逻辑
        // 例如更新数据库中的订单状态等
    }
}