Servlet全生命周期

Servlet全生命周期

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

@WebServlet(
    name = "ExampleServlet",
    urlPatterns = {"/example"},
    description = "An example Servlet",
    initParams = {
        @WebInitParam(name = "param1", value = "value1"),
        @WebInitParam(name = "param2", value = "value2")
    },
    asyncSupported = true
)
public class ExampleServlet extends HttpServlet {

    @Override
    public void init() throws ServletException {
        // 在Servlet初始化时调用，可以进行一些初始化工作
        super.init();
        String param1 = getInitParameter("param1");
        String param2 = getInitParameter("param2");
        System.out.println("Servlet初始化... param1: " + param1 + ", param2: " + param2);
    }

    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        // 处理GET请求的主要方法
        System.out.println("处理GET请求...");
        response.setContentType("text/plain");
        response.getWriter().write("Hello from ExampleServlet!");
    }

    @Override
    public void destroy() {
        // 在Servlet销毁时调用，可以进行一些清理工作
        System.out.println("Servlet销毁...");
        super.destroy();
    }
}

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