SpringBoot微框架

簡介

創建Maven項目

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>
	      
	      <!-- 添加對JSP支持的依賴包 -->
	      <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、定義啓動文件

package com.mingde;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.web.servlet.ServletComponentScan;

@SpringBootApplication
@ServletComponentScan		//此爲開啓servlet包中的serlvet類
public class SpringBootSimpleApplication {
	
	public static void main(String[] args){
		SpringApplication.run(SpringBootSimpleApplication.class, args);
	}
	
}

測試

定義控制器（只是讓頁面輸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";
	}
	
	
}

測試

在地址欄上：http://localhost:8080/xs/hello

頁面輸入結果爲返回的字符串：Holle,SpringBoot

注意：@RestController相當於@Contrller+@ResponseBody

讓SpringBoot支持JSP

定義控制器

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", "三國演義");
		map.put("book2", "水滸傳");
		map.put("book3", "西遊記");
		map.put("book4", "紅樓夢");
		model.addAttribute("book", map);
		return "hello";
	}
	
}

在classpath目錄下定義application.properties文件

 

測試：

在SpringBoot中定義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說明",urlPatterns="/xs/hello") //設置訪問的路徑，這裏的路徑可以於控制層的路徑一樣，這樣就會同時訪問Servlet和controller
public class HellowServlet extends HttpServlet {
	private static final long serialVersionUID = 1L;
       
	@Override
	public void service(ServletRequest arg0, ServletResponse arg1) throws ServletException, IOException {
		System.out.println("HelloServlet正在運行中……");
	}
	
}

在啓動文件中添加@ServletComponentScan註解

package com.mingde;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.web.servlet.ServletComponentScan;

@SpringBootApplication
@ServletComponentScan		//此爲開啓servlet包中的serlvet類
public class SpringBootSimpleApplication {
	
	public static void main(String[] args){
		SpringApplication.run(SpringBootSimpleApplication.class, args);
	}
	
}

測試：

地址欄：http://localhost:8085/xs/hello

控制檯：HelloServlet正在運行中……

在SpringBoot中定義過濾器

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="/*")//代表過濾所有的請求
public class MyFilter implements Filter {

	public void init(FilterConfig fConfig) throws ServletException {
		System.out.println("過濾器初始化……");
	}

	public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
		System.out.println("過濾器MyFilter正在執行……");
		chain.doFilter(request, response);
	}

	public void destroy() {
		System.out.println("過濾器被銷燬……");
	}

}

定義監聽器：

定義SevletContextListener監聽器

package com.mingde.listener;

import javax.servlet.ServletContextEvent;
import javax.servlet.annotation.WebListener;

@WebListener
public class ServletContextListener implements javax.servlet.ServletContextListener {


    public void contextDestroyed(ServletContextEvent arg0)  { 
        System.out.println("監聽器MyServletContextListener被銷燬");
    }


    public void contextInitialized(ServletContextEvent arg0)  { 
    	System.out.println("監聽器MyServletContextListener初始化");
    }
	
}

定義HttpSessionListener監聽器

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被創建……");
    }

    public void sessionDestroyed(HttpSessionEvent arg0)  { 
    	System.out.println("session被銷燬……");
    }
	
}