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一 前言
在以前的web.xml方式中,我们是通过以下形式进行配置的:
<servlet>
<servlet-name>FirstServlet</servlet-name>
<servlet-class>com.bjsxt.servlet.FirstServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>FirstServlet</servlet-name>
<url-pattern>/first</url-pattern>
</servlet-mapping>
但是在springboot整合servlet可以通过以下的两种方式,
- 通过注解扫描完成 Servlet 组件的注册,
- 通过方法完成 Servlet 组件的注册
pom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/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.5.10.RELEASE</version>
</parent>
<groupId>com.bjsxt</groupId>
<artifactId>02-spring-boot-servlet</artifactId>
<version>0.0.1-SNAPSHOT</version>
<!-- jdk1.7 -->
<properties>
<java.version>1.7</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
</dependencies>
</project>
二 注解扫描方式
1 编写servlet类
package com.bjsxt.servlet;
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
@WebServlet(name="FirstServlet",urlPatterns="/first")
public class FirstServlet extends HttpServlet {
@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
System.out.println("FirstServlet............");
}
}
2..编写启动类
package com.bjsxt;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.web.servlet.ServletComponentScan;
/**
* SpringBoot整合Servlet方式一
*/
@SpringBootApplication
@ServletComponentScan //在springBoot启动时会扫描@WebServlet,并将该类实例化
public class App {
public static void main(String[] args) {
SpringApplication.run(App.class, args);
}
}
三 方法方式
1.编写servlet类
package com.bjsxt.servlet;
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
/**
*SpringBoot整合Servlet方式二
*
*/
public class SecondServlet extends HttpServlet {
@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
System.out.println("SecondServlet..........");
}
}
2.编写启动类
package com.bjsxt;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.web.servlet.ServletRegistrationBean;
import org.springframework.context.annotation.Bean;
import com.bjsxt.servlet.SecondServlet;
/**
* SpringBoot整合Servlet方式二
*
*
*/
@SpringBootApplication
public class App2 {
public static void main(String[] args) {
SpringApplication.run(App2.class, args);
}
@Bean
public ServletRegistrationBean getServletRegistrationBean(){
ServletRegistrationBean bean=new ServletRegistrationBean(new SecondServlet(), "/second");
return bean;
}
}