解析SpringBoot是如何将jar打包并部署到Tomcat

Tomcat 作为一个轻量级服务器，深受 Java 程序开发者的青睐，经常被应用在 JavaWeb 应用开发中。下面，我将和大家分享关于 SpringBoot 框架是如何将jar进行打包，并把 jar 包部署到 Tomcat 服务器上。

1.详细步骤

首先在pom.xml文件中做一些修改：

之前打war包需要修改打包方式，这次不需要了，因为默认就是 jar 包指定最终打成jar包的名称手动指定 resources 文件夹编译打包的路径添加SpringBoot内嵌Tomcat解析jsp的依赖（仅仅是为这个实例而添加）

<?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 https://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>2.4.5</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
 
    <groupId>com.songzihao.springboot</groupId>
    <artifactId>023-springboot-jar</artifactId>
    <version>1.0.0</version>
 
    <properties>
        <java.version>11</java.version>
    </properties>
 
    <dependencies>
        <dependency>
            <groupId>org.apache.tomcat.embed</groupId>
            <artifactId>tomcat-embed-jasper</artifactId>
        </dependency>
 
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
 
    </dependencies>
 
    <build>
        <finalName>SpringBootJar</finalName>
 
        <resources>
            <resource>
                <directory>src/main/webapp</directory>
                <targetPath>META-INF/resources</targetPath>
                <includes>
                    <include>*.*</include>
                </includes>
            </resource>
            <resource>
                <directory>src/main/resources</directory>
                <includes>
                    <include>**/*.*</include>
                </includes>
            </resource>
        </resources>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <version>1.4.2.RELEASE</version>
            </plugin>
        </plugins>
    </build>
 
</project>

之后写一个控制层，UserController

package com.songzihao.springboot.controller;
 
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
 
import java.util.HashMap;
import java.util.Map;
 
/**
 *
 */
@Controller
public class UserController {
 
    @RequestMapping(value = "/user/detail")
    public @ResponseBody Object userDetail() {
        Map<String,Object> map=new HashMap<>();
        map.put("id",1001);
        map.put("username","张起灵");
        return map;
    }
 
    @RequestMapping(value = "/user/page/detail")
    public String userPageDetail(Model model) {
        model.addAttribute("id",1001);
        model.addAttribute("username","小哥");
        return "userDetail";
    }
 
}

在核心配置文件中，配置内嵌Tomcat的端口号、上下文根，以及视图解析器。

server.port=9090
server.servlet.context-path=/
 
spring.mvc.view.prefix=/
spring.mvc.view.suffix=.jsp

然后写一个控制层中对应的jsp页面，用做模拟测试。

<%@ page contentType="text/html;charset=utf-8" language="java" %>
<html>
<head>
    <title>$</title>
</head>
<body>
    <h3>用户编号：${id}</h3>
    <h3>用户姓名：${username}</h3>
</body>
</html>

最后是SpringBoot项目的入口类。

package com.songzihao.springboot;
 
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
 
@SpringBootApplication
public class Application {
 
    public static void main(String[] args) {
        SpringApplication.run(Application.class, args);
    }
 
}

1.1 在IDEA中启动测试

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