嵌入式Jetty和使用千分尺进行统计的示例(无弹簧)

<dependency>
    <groupId>org.eclipse.jetty</groupId>
    <artifactId>jetty-server</artifactId>
    <version>9.4.43.v20210629</version>
</dependency>

import org.eclipse.jetty.server.Server;
import org.eclipse.jetty.servlet.ServletContextHandler;
import org.eclipse.jetty.servlet.ServletHolder;

public class EmbeddedJettyExample {
    public static void main(String[] args) throws Exception {
        Server server = new Server(8080); // 指定监听的端口号

        ServletContextHandler context = new ServletContextHandler();
        context.setContextPath("/"); // 指定上下文路径

        server.setHandler(context);

        // 注册Servlet或其他处理器
        context.addServlet(new ServletHolder(new StatisticsServlet()), "/statistics");

        server.start();
        server.join();
    }
}

import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

public class StatisticsServlet extends HttpServlet {
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws IOException {
        // 获取请求参数
        String param = req.getParameter("param");

        // 进行统计逻辑处理
        int result = performStatistics(param);

        // 返回统计结果
        resp.getWriter().println("Statistics Result: " + result);
    }

    private int performStatistics(String param) {
        // 实现具体的统计逻辑
        // ...
        return 0;
    }
}

import java.math.BigDecimal;

public class StatisticsUtil {
    public static BigDecimal calculateAverage(BigDecimal[] values) {
        BigDecimal sum = BigDecimal.ZERO;
        for (BigDecimal value : values) {
            sum = sum.add(value);
        }
        return sum.divide(BigDecimal.valueOf(values.length), 3, BigDecimal.ROUND_HALF_UP);
    }
}