第一步:创建filter包,然后创建MyFilter类
package com.pp.springbootmvc.filter;
import javax.servlet.*;
import java.io.IOException;
public class MyFilter implements Filter {
@Override
public void init(FilterConfig filterConfig) throws ServletException {
}
@Override
public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
System.out.println("MyFilter process...");
filterChain.doFilter(servletRequest,servletResponse);
}
@Override
public void destroy() {
}
}
第二步:创建listener包,然后创建MyListener 类
package com.pp.springbootmvc.listener;
import javax.servlet.ServletContextEvent;
import javax.servlet.ServletContextListener;
public class MyListener implements ServletContextListener {
@Override
public void contextInitialized(ServletContextEvent sce) {
System.out.println("contextInitialized...web已经启动");
}
@Override
public void contextDestroyed(ServletContextEvent sce) {
System.out.println("contextInitialized...web项目销毁");
}
}
第三步:创建servlet包,然后创建MyServlet 类
package com.pp.springbootmvc.servlet;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
public class MyServlet extends HttpServlet {
@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
doPost(req, resp);
}
@Override
protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
resp.getWriter().write("Hello Servlet");
}
}
第四步:再config包中创建MyServerConfig 类
package com.pp.springbootmvc.config;
import com.pp.springbootmvc.filter.MyFilter;
import com.pp.springbootmvc.listener.MyListener;
import com.pp.springbootmvc.servlet.MyServlet;
import org.springframework.boot.web.server.ConfigurableWebServerFactory;
import org.springframework.boot.web.server.WebServerFactoryCustomizer;
import org.springframework.boot.web.servlet.FilterRegistrationBean;
import org.springframework.boot.web.servlet.ServletListenerRegistrationBean;
import org.springframework.boot.web.servlet.ServletRegistrationBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import java.util.Arrays;
@Configuration
public class MyServerConfig {
//注册三大组件
@Bean
public ServletRegistrationBean myServlet(){
ServletRegistrationBean registrationBean = new ServletRegistrationBean(new MyServlet(),"/myServlet");
registrationBean.setLoadOnStartup(1);
return registrationBean;
}
@Bean
public FilterRegistrationBean myFilter(){
FilterRegistrationBean registrationBean = new FilterRegistrationBean();
registrationBean.setFilter(new MyFilter());
registrationBean.setUrlPatterns(Arrays.asList("/hello","/myServlet"));
return registrationBean;
}
@Bean
public ServletListenerRegistrationBean myListener(){
ServletListenerRegistrationBean<MyListener> registrationBean = new ServletListenerRegistrationBean<>(new MyListener());
return registrationBean;
}
//配置嵌入式的Servlet容器
@Bean
public WebServerFactoryCustomizer<ConfigurableWebServerFactory> webServerFactoryCustomizer(){
return new WebServerFactoryCustomizer<ConfigurableWebServerFactory>() {
@Override
public void customize(ConfigurableWebServerFactory factory) {
factory.setPort(8081);
}
};
}
}
第五步:运行
1.前台页面
2.控制台页面