springboot:servlet

最新推荐文章于 2025-10-17 21:49:16 发布

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本文介绍了一个基于SpringBoot的应用程序实例，该程序包含了Servlet、Filter及ServletContextListener等组件的具体实现方式。通过这些组件，可以进一步拓展SpringBoot应用的功能。

Application.java
================================================
@SpringBootApplication
//支持servlet
@ServletComponentScan
public class Application {

public static void main(String[] args) {
// 程序启动入口
// 启动嵌入式的 Tomcat 并初始化 Spring 环境及其各 Spring 组件
SpringApplication.run(Application.class,args);
}
}
================================================
TestServlet.java
================================================
@WebServlet(urlPatterns="/test/servlet", description="Servlet测试")
public class TestServlet extends HttpServlet {

@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
System.out.println("run doGet");
doPost(req, resp);
}

@Override
protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
System.out.println("run dopost");
resp.setContentType("text/html");
PrintWriter out = resp.getWriter();
out.println("<html>");
out.println("<head>");
out.println("<title></title>");
out.println("</head>");
out.println("<body>");
out.println("<h1>Hello World</h1>");
out.println("</body>");
out.println("</html>");
}

}
================================================
TestFilter.java
================================================
@WebFilter(filterName="testFilter",urlPatterns="/*")
public class TestFilter implements Filter {

@Override
public void destroy() {
System.out.println("destroy");
}

@Override
public void doFilter(ServletRequest request, ServletResponse response,
FilterChain chain) throws IOException, ServletException {
System.out.println("doFilter");
chain.doFilter(request, response);
}

@Override
public void init(FilterConfig config) throws ServletException {
System.out.println("init");
}

}

================================================
TestServletContextListener.java
================================================
@WebListener
public class TestServletContextListener implements ServletContextListener {

@Override
public void contextInitialized(ServletContextEvent sce) {
System.out.println("ServletContex初始化");
System.out.println(sce.getServletContext().getServerInfo());
}

@Override
public void contextDestroyed(ServletContextEvent sce) {
System.out.println("ServletContex销毁");
}

}
================================================
TestHttpSessionListener.java
================================================
@WebListener
public class TestHttpSessionListener implements HttpSessionListener {

//监听Session的创建与销毁

@Override
public void sessionCreated(HttpSessionEvent se) {
System.out.println("Session 被创建");
}

@Override
public void sessionDestroyed(HttpSessionEvent se) {
System.out.println("ServletContex初始化");
}

}