Spring Boot 与Web三大组件整合

短命女 2023-05-31 12:11 2阅读 0赞

### Spring Boot 与Web三大组件整合 ###

### 与Servlet整合 ###

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;
    
    @WebServlet(urlPatterns ="/webservlet" )
    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 { 
            System.out.println("---MyServlet---");
        }
    }

### 与Filter整合 ###

import javax.servlet.*;
    import javax.servlet.annotation.WebFilter;
    import java.io.IOException;
    
    @WebFilter(urlPatterns = "/*")
    public class MyFilter implements Filter { 
        @Override
        public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException { 
            System.out.println("---MyFilter---");
            filterChain.doFilter(servletRequest,servletResponse);
        }
    
        @Override
        public void init(FilterConfig filterConfig) throws ServletException { 
    
        }
    
        @Override
        public void destroy() { 
    
        }
    }

### 与Listener整合 ###

import javax.servlet.ServletRequestEvent;
    import javax.servlet.ServletRequestListener;
    import javax.servlet.annotation.WebListener;
    
    @WebListener
    public class MyListener implements ServletRequestListener { 
        @Override
        public void requestDestroyed(ServletRequestEvent sre) { 
            System.out.println("request销毁");
        }
    
        @Override
        public void requestInitialized(ServletRequestEvent sre) { 
            System.out.println("request初始化");
        }
    }

### spring boot 启动 ###

import org.springframework.boot.SpringApplication;
    import org.springframework.boot.autoconfigure.SpringBootApplication;
    import org.springframework.boot.web.servlet.ServletComponentScan;
    
    @SpringBootApplication
    @ServletComponentScan(basePackages = "com.frl.web")
    public class WebintegrationApplication { 
    
        public static void main(String[] args) { 
            SpringApplication.run(WebintegrationApplication.class, args);
        }
    
    }

### 效果 ###

:: Spring Boot ::        (v2.1.7.RELEASE)
    ...............................
    request初始化
    ---MyFilter---
    ---MyServlet---
    request销毁