SpringBoot微框架

简介

创建Maven项目

一、配置pom.xml文件

<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/maven-v4_0_0.xsd">  <modelVersion>4.0.0</modelVersion>  <groupId>org.springboot.sample</groupId>  <artifactId>spring-boot-sample</artifactId>  <packaging>war</packaging>  <version>1.0.0.0-SNAPSHOT</version>  <name>spring-boot-sample Maven Webapp</name>     <parent>        <groupId>org.springframework.boot</groupId>        <artifactId>spring-boot-starter-parent</artifactId>        <version>1.5.8.RELEASE</version>        <relativePath/> <!-- lookup parent from repository -->    </parent>    <properties>        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>        <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>            <!-- 添加对JSP支持的依赖包 -->      <dependency>            <groupId>org.apache.tomcat.embed</groupId>            <artifactId>tomcat-embed-jasper</artifactId>            <scope>provided</scope>          </dependency>      <dependency>         <groupId>javax.servlet</groupId>         <artifactId>jstl</artifactId>      </dependency>                 </dependencies>     <repositories>          <repository>             <id>Central</id>               <name>Central</name>               <url>http://repo1.maven.org/maven2</url>           </repository>          <repository>             <id>mvnrepository</id>               <name>mvnrepository</name>               <url>http://mvnrepository.com/</url>           </repository>           <repository>             <id>sonatype</id>               <name>sonatype</name>               <url>http://www.sonatype.org/nexus/</url>           </repository></repositories>    <build>        <plugins>            <plugin>                <groupId>org.springframework.boot</groupId>                <artifactId>spring-boot-maven-plugin</artifactId>            </plugin>        </plugins>    </build>        </project>

二、定义启动文件

package com.mingde;import org.springframework.boot.SpringApplication;import org.springframework.boot.autoconfigure.SpringBootApplication;import org.springframework.boot.web.servlet.ServletComponentScan;@SpringBootApplication@ServletComponentScan//此为开启servlet包中的serlvet类public class SpringBootSimpleApplication {public static void main(String[] args){SpringApplication.run(SpringBootSimpleApplication.class, args);}}

测试

定义控制器（只是让页面输出返回的字符串而已）

package com.mingde.controller;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.RestController;@RestController@RequestMapping("/xs")public class HelloController {@RequestMapping("hello")public String hello(){return "Holle,SpringBoot";}}

测试

在地址栏上：http://localhost:8080/xs/hello

页面输入结果为返回的字符串：Holle,SpringBoot

注意：@RestController相当于@Contrller+@ResponseBody

让SpringBoot支持JSP

定义控制器

package com.mingde.controller;import java.util.HashMap;import java.util.Map;import org.springframework.stereotype.Controller;import org.springframework.ui.Model;import org.springframework.web.bind.annotation.RequestMapping;@Controller@RequestMapping("JSP")public class JSPController {@RequestMapping("/hello")public String hello(Model model)throws Exception{Map<String,String> map=new HashMap<String,String>();map.put("book1", "三国演义");map.put("book2", "水浒传");map.put("book3", "西游记");map.put("book4", "红楼梦");model.addAttribute("book", map);return "hello";}}

在classpath目录下定义application.properties文件

 

测试：

在SpringBoot中定义Servlet

package com.mingde.servlet;import java.io.IOException;import javax.servlet.ServletException;import javax.servlet.ServletRequest;import javax.servlet.ServletResponse;import javax.servlet.annotation.WebServlet;import javax.servlet.http.HttpServlet;@WebServlet(description="Servlet说明",urlPatterns="/xs/hello") //设置访问的路径，这里的路径可以于控制层的路径一样，这样就会同时访问Servlet和controllerpublic class HellowServlet extends HttpServlet {private static final long serialVersionUID = 1L;       @Overridepublic void service(ServletRequest arg0, ServletResponse arg1) throws ServletException, IOException {System.out.println("HelloServlet正在运行中……");}}

在启动文件中添加@ServletComponentScan注解

package com.mingde;import org.springframework.boot.SpringApplication;import org.springframework.boot.autoconfigure.SpringBootApplication;import org.springframework.boot.web.servlet.ServletComponentScan;@SpringBootApplication@ServletComponentScan//此为开启servlet包中的serlvet类public class SpringBootSimpleApplication {public static void main(String[] args){SpringApplication.run(SpringBootSimpleApplication.class, args);}}

测试：

地址栏：http://localhost:8085/xs/hello

控制台：HelloServlet正在运行中……

在SpringBoot中定义过滤器

package com.mingde.filter;import java.io.IOException;import javax.servlet.Filter;import javax.servlet.FilterChain;import javax.servlet.FilterConfig;import javax.servlet.ServletException;import javax.servlet.ServletRequest;import javax.servlet.ServletResponse;import javax.servlet.annotation.WebFilter;@WebFilter(filterName="myFilter",urlPatterns="/*")//代表过滤所有的请求public class MyFilter implements Filter {public void init(FilterConfig fConfig) throws ServletException {System.out.println("过滤器初始化……");}public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {System.out.println("过滤器MyFilter正在执行……");chain.doFilter(request, response);}public void destroy() {System.out.println("过滤器被销毁……");}}

定义监听器：

定义SevletContextListener监听器

package com.mingde.listener;import javax.servlet.ServletContextEvent;import javax.servlet.annotation.WebListener;@WebListenerpublic class ServletContextListener implements javax.servlet.ServletContextListener {    public void contextDestroyed(ServletContextEvent arg0)  {         System.out.println("监听器MyServletContextListener被销毁");    }    public void contextInitialized(ServletContextEvent arg0)  {     System.out.println("监听器MyServletContextListener初始化");    }}

定义HttpSessionListener监听器

package com.mingde.listener;import javax.servlet.http.HttpSessionEvent;public class HttpSessionListener implements javax.servlet.http.HttpSessionListener {   public void sessionCreated(HttpSessionEvent arg0)  {          System.out.println("session被创建……");    }    public void sessionDestroyed(HttpSessionEvent arg0)  {     System.out.println("session被销毁……");    }}