Spring boot（8）--自定义tomcat_spring boot 项目自定义tomcat-优快云博客

本文链接：https://blog.youkuaiyun.com/weixin_46822085/article/details/109561241

本文介绍如何在SpringBoot中内嵌Tomcat并实现基本的Servlet功能。通过配置Maven依赖，创建简单的Servlet，并利用Tomcat提供的API启动服务器，演示了一个简单的HTTP请求响应过程。

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对于springboot来说，还有两块是比较有意思的，第一就是发现他内置了tomcat,接下来一快就是他对springmvc进行了无缝整合。我们自己也可以试试。

1、内嵌tomcat

首先来看下最简单的tomcat集成。
1)新建一个项目，pom文件如下:

<?xml version="1.0" encoding="UTF-8"?>
<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>enjoy</groupId>
    <artifactId>java_tomcat</artifactId>
    <version>1.0-SNAPSHOT</version>

    <dependencies>

        <!--Java语言操作tomcat -->
        <dependency>
            <groupId>org.apache.tomcat.embed</groupId>
            <artifactId>tomcat-embed-core</artifactId>
            <version>8.5.16</version>
        </dependency>

        <!-- tomcat对jsp支持 -->
        <dependency>
            <groupId>org.apache.tomcat</groupId>
            <artifactId>tomcat-jasper</artifactId>
            <version>8.5.16</version>
        </dependency>

    </dependencies>
</project>

新建立一个servlet

import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class IndexServlet 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 {
        resp.getWriter().print("this is index... tomcat");
    }

}

通过这个servlet,使用tomcat整合

import cn.enjoy.servlet.IndexServlet;
import org.apache.catalina.LifecycleException;
import org.apache.catalina.core.StandardContext;
import org.apache.catalina.startup.Tomcat;

public class DeerTomcat {

    private static int PORT = 8080;
    private static String CONTEX_PATH = "/enjoy";
    private static String SERVLET_NAME = "indexServlet";

    public static void main(String[] args) throws LifecycleException, InterruptedException {

        // 创建tomcat服务器
        Tomcat tomcatServer = new Tomcat();
        // 指定端口号
        tomcatServer.setPort(PORT);
        // 是否设置自动部署
        tomcatServer.getHost().setAutoDeploy(false);
        // 创建上下文
        StandardContext standardContex = new StandardContext();
        standardContex.setPath(CONTEX_PATH);
        // 监听上下文
        standardContex.addLifecycleListener(new Tomcat.FixContextListener());
        // tomcat容器添加standardContex
        tomcatServer.getHost().addChild(standardContex);

        // 创建Servlet
        tomcatServer.addServlet(CONTEX_PATH, SERVLET_NAME, new IndexServlet());
        // servleturl映射
        standardContex.addServletMappingDecoded("/index", SERVLET_NAME);
        tomcatServer.start();
        System.out.println("tomcat服务器启动成功..");
        // 异步进行接收请求
        tomcatServer.getServer().await();

    }
}