【SpringBoot探索一】SpringBoot快速搭建基础web项目

版权声明:本文为博主原创文章,转载请注明出处。 https://blog.csdn.net/struggling_rong/article/details/79118849

springboot的好处不必多言,仅靠免去编写大量的配置文件这一点就已经足以说明其在java web开发领域的优势,该系列博客是自己的工作和学习的一个记录,方便以后查阅,同时也希望能对看到此系列的博友带来一点帮助。由于是一个随笔并不是很规范完整,可能其中有些遗漏,错误。望不吝在博客下方留言指出。
开发环境:jdk1.8,centos7,maven3.5.0,tomcat8.5,mysql5.7,redis3.2.9
开发工具:Intellij IDEA,virtual box,xshell,xftp

一.创建一个maven项目

请参考之前博客:使用Maven构建多模块项目

二.修改webapp-parent模块的pom文件,添加springboot相关组件

<?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/maven-v4_0_0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>com.my.webapp</groupId>
    <artifactId>webapp-parent</artifactId>
    <packaging>pom</packaging>
    <version>1.0.0-SNAPSHOT</version>
    <name>webapp-parent</name>
    <url>http://maven.apache.org</url>

    <!--包含springboot基础配置-->
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.5.4.RELEASE</version>
    </parent>

    <properties>
        <project.encoding>UTF-8</project.encoding>
    </properties>

    <!--dependencyManagement属性: 表示子模块添加了和父模块一样的依赖,如果子模块没有申明版本,则使用父类的版本,如果子模块没有添加该依赖,则不会继承
    -->
    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>junit</groupId>
                <artifactId>junit</artifactId>
                <version>3.8.1</version>
                <scope>test</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>

    <build>
        <plugins>
            <!--配置maven编译选项-->
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <configuration>
                    <!--源代码编译java版本-->
                    <source>1.8</source>
                    <!--目标class文件编译java版本-->
                    <target>1.8</target>
                    <encoding>${project.encoding}</encoding>
                </configuration>
            </plugin>
        </plugins>
    </build>
    <modules>
        <module>webapp-common</module>
        <module>webapp-dao</module>
        <module>webapp-service</module>
        <module>webapp-controller</module>
    </modules>
</project>

添加spring boot依赖,配置maven编译插件

三.修改webapp-controller模块的pom文件,添加springboot相关组件

<?xml version="1.0"?>
<project xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"
         xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>com.my.webapp</groupId>
        <artifactId>webapp-parent</artifactId>
        <version>1.0.0-SNAPSHOT</version>
    </parent>
    <artifactId>webapp-controller</artifactId>
    <packaging>war</packaging>
    <name>webapp-controller Maven Webapp</name>
    <url>http://maven.apache.org</url>
    <dependencies>
        <!--核心 POM,包含自动配置支持、日志库和对 YAML 配置文件的支持。-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
        </dependency>
        <!--对应用系统的自省和监控的集成功能-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>
        <!--支持 Web 应用开发,包含 Tomcat 和 spring-mvc。-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <!--包含常用的测试所需的依赖,如 JUnit、Hamcrest、Mockito 和 spring-test 等。-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <!--包含 spring-aop 和 AspectJ 来支持面向切面编程(AOP)。-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-aop</artifactId>
        </dependency>

        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>com.my.webapp</groupId>
            <artifactId>webapp-common</artifactId>
            <version>${project.version}</version>
        </dependency>
        <dependency>
            <groupId>com.my.webapp</groupId>
            <artifactId>webapp-service</artifactId>
            <version>${project.version}</version>
        </dependency>
    </dependencies>
    <build>
        <finalName>webapp-controller</finalName>
    </build>
</project>

四.添加应用程序启动文件和一个controller示例

Application.java

package com.webapp;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;

/**
 */
@Configuration
//配置web服务器启动加载指定包下的组件
@ComponentScan
@EnableAutoConfiguration
public class Application {
    public static void main(String[] args) {
        SpringApplication.run(Application.class);
    }
}

LoginController.java

package com.webapp.controller;

import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;

/**
 */
@RestController
@RequestMapping("/user")
public class LoginController extends BaseController {

    @RequestMapping(value = "/login/{name}", method = RequestMethod.GET)
    public String login(@PathVariable("name") String name) {
        System.out.println(name);
        return "welcome to spring boot world!";
    }
}

五.运行web项目,查看结果

运行Application.java
浏览器地址栏输入:http://localhost:8080/user/login/534
页面显示”welcome to spring boot world”则搭建成功

六.webapp-service模块下编写一个service文件,并在controller下调用

LoginServiceImpl.java

package com.my.webapp.service.impl;

import com.my.webapp.service.LoginService;
import org.springframework.stereotype.Service;

/**
 */
@Service
public class LoginServiceImpl implements LoginService {
    @Override
    public String login() {
        return "welcome to spring boot world!";
    }
}

LoginController.java

package com.webapp.controller;

import com.my.webapp.service.LoginService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;

/**
 */
@RestController
@RequestMapping("/user")
public class LoginController extends BaseController {

    @Autowired
    private LoginService loginService;

    @RequestMapping(value = "/login/{name}", method = RequestMethod.GET)
    public String login(@PathVariable("name") String name) {
        System.out.println(name);
        return "welcome to spring boot world!";
    }

    @RequestMapping(value = "/loginWithService/{name}", method = RequestMethod.GET)
    public String loginWithService(@PathVariable("name") String name) {
        System.out.println(name);
        return loginService.login();
    }
}

还需要在Application.java文件下添加对service包的扫描

package com.webapp;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;

/**
 */
@Configuration
//配置web服务器启动加载指定包下的组件
@ComponentScan(basePackages = {
        "com.my.webapp.service",
        "com.webapp.controller"})
@EnableAutoConfiguration
public class Application {
    public static void main(String[] args) {
        SpringApplication.run(Application.class);
    }
}

浏览器地址栏输入:http://localhost:8080/user/loginWithService/534
页面显示”welcome to spring boot world”则搭建成功

七.让web项目能成功部署到tomcat容器中运行

如果我们需要将项目打包成war包并部署在tomcat中,还需要编写对应的启动类,

扫描二维码关注公众号,回复: 3294970 查看本文章

在Application.java同级包下编写一个继承自SpringBootServletInitializer的类,并覆写configure()方法

SpringApplicationBuilder.java

package com.webapp;

import org.springframework.boot.builder.SpringApplicationBuilder;
import org.springframework.boot.web.support.SpringBootServletInitializer;

/**
 */
public class SpringBootStartApplication extends SpringBootServletInitializer {
    @Override
    protected SpringApplicationBuilder configure(SpringApplicationBuilder builder) {
        // 注意这里要指向原先用main方法执行的Application启动类
        return builder.sources(Application.class);
    }
}

这样打成的war包能够成功部署到tomcat容器中。

参考案例已上传至csdn,欢迎下载交流讨论
【SpringBoot探索一】SpringBoot快速搭建基础web项目

猜你喜欢

转载自blog.csdn.net/struggling_rong/article/details/79118849