前言
常用监听器: //contextListener可以监听数据库的连接,第三方组件的交互,还有静态文件加载等等 servletContextListener HttpSessionListener servletRequestListener
1.添加pom.xml相关依赖
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>top.ytheng</groupId> <artifactId>springboot-demo</artifactId> <version>0.0.1</version> <packaging>jar</packaging> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.0.5.RELEASE</version> <relativePath/> <!-- lookup parent from repository --> </parent> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding> <java.version>1.8</java.version> </properties> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-thymeleaf</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-devtools</artifactId> <optional>true</optional> <scope>true</scope> </dependency> </dependencies> <build> <!-- 打包的名称 --> <finalName>myspringboot</finalName> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> <plugin> <artifactId>maven-compiler-plugin</artifactId> <configuration> <source>1.8</source> <target>1.8</target> </configuration> </plugin> </plugins> </build> </project>
2.添加自定义ContextListener监听器
package top.ytheng.demo.listener; import javax.servlet.ServletContextEvent; import javax.servlet.ServletContextListener; import javax.servlet.annotation.WebListener; /* * 上下文监听器 * * */ @WebListener public class ContextListener implements ServletContextListener { @Override public void contextInitialized(ServletContextEvent sce) { // TODO Auto-generated method stub System.out.println("======contextInitialized======"); } @Override public void contextDestroyed(ServletContextEvent sce) { // TODO Auto-generated method stub System.out.println("======contextDestroyed======"); } }
3.添加自定义RequestListener
package top.ytheng.demo.listener; import javax.servlet.ServletRequestEvent; import javax.servlet.ServletRequestListener; import javax.servlet.annotation.WebListener; @WebListener public class RequestListener implements ServletRequestListener{ @Override public void requestDestroyed(ServletRequestEvent sre) { // TODO Auto-generated method stub System.out.println("======requestDestroyed======"); } @Override public void requestInitialized(ServletRequestEvent sre) { // TODO Auto-generated method stub System.out.println("======requestInitialized======"); } }
4.添加测试控制器
package top.ytheng.demo.controller; import java.util.HashMap; import java.util.Map; import org.springframework.web.bind.annotation.GetMapping; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RestController; @RestController @RequestMapping("/api/v2/listener") public class ListenerController { @GetMapping("/test") public Object testListener() { Map<String, Object> map = new HashMap<>(); map.put("username", "theng"); map.put("password", "123456"); System.out.println("listenerController"); return map; } }
5.添加启动类
package top.ytheng.demo; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.boot.web.servlet.ServletComponentScan; @SpringBootApplication //等于下面3个 //@SpringBootConfiguration //@EnableAutoConfiguration //@ComponentScan //拦截器用到 @ServletComponentScan public class DemoApplication { public static void main(String[] args) { SpringApplication.run(DemoApplication.class, args); } }
6.右键项目Run As启动,访问地址
http://localhost:8080/api/v2/listener/test
另附:
原文地址:https://www.cnblogs.com/tianhengblogs/p/9782475.html
时间: 2024-11-12 21:30:25