SpringBoot非web應(yīng)用程序

在Spring Boot框架中，要?jiǎng)?chuàng)建一個(gè)非Web應(yīng)用程序(純Java程序)，有兩種方式。

方式一：直接在main方法中，根據(jù)SpringApplication.run()方法獲取返回的Spring容器對象，再獲取業(yè)務(wù)bean進(jìn)行調(diào)用

項(xiàng)目名稱：025-springboot-java-01

1.創(chuàng)建一個(gè)SpringBoot Module

2.創(chuàng)建一個(gè)演示UserService接口及實(shí)現(xiàn)類

UserService.java接口

package com.abc.springboot.service;

/**
 * ClassName:UserService
 * Package:com.abc.springboot.service
 * Description:<br/>
 */
public interface UserService {

    String sayHello();
}

UserServiceImpl.java接口實(shí)現(xiàn)類

package com.abc.springboot.service.impl;

import com.abc.springboot.service.UserService;
import org.springframework.stereotype.Service;

/**
 * ClassName:UserServiceImpl
 * Package:com.abc.springboot.service.impl
 * Description:<br/>
 */
@Service
public class UserServiceImpl implements UserService {

    @Override
    public String sayHello() {
        return "Hello,SpringBoot Java！";
    }
}

3.在Application類的main方法中，獲取容器，調(diào)用業(yè)務(wù)bean

package com.abc.springboot;

import com.abc.springboot.service.UserService;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.ConfigurableApplicationContext;

@SpringBootApplication
public class Application {

    public static void main(String[] args) {

        /**
         * SpringBoot程序啟動后，返回值是ConfigurableApplicationContext，它也是一個(gè)Spring容器對象
         * 它其它相當(dāng)于原來Spring中啟動容器ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext("");
         */

        //獲取SpringBoot程序啟動后的Spring容器
        ConfigurableApplicationContext context = SpringApplication.run(Application.class, args);

        //從Spring容器中獲取指定bean的對象
        UserService userService = (UserService) context.getBean("userServiceImpl");

        //調(diào)用業(yè)務(wù)bean的方法
        String sayHello = userService.sayHello();

        System.out.println(sayHello);
    }
}

方式二：Spring boot 的入口類實(shí)現(xiàn)CommandLineRunner接口

項(xiàng)目名稱：026-springboot-java-02

創(chuàng)建一個(gè)UserService接口及接口實(shí)現(xiàn)類

UserService.java接口類

package com.abc.springboot.service;

/**
 * ClassName:UserService
 * Package:com.abc.springboot.service
 * Description:

 */
public interface UserService {

    String sayHello();
}

UserServiceImpl.java

package com.abc.springboot.service.impl;

import com.abc.springboot.service.UserService;
import org.springframework.stereotype.Service;

/**
 * ClassName:UserServiceImpl
 * Package:com.abc.springboot.service.impl
 * Description:

 */
@Service
public class UserServiceImpl implements UserService {

    @Override
    public String sayHello() {
        return "Hello,SpringBoot Java！";
    }
}

將Application類的@SpringBootApplication注解注釋掉，復(fù)制一個(gè)新的Application取名為Application2，實(shí)現(xiàn)CommandLineRunner接口

package com.abc.springboot;

import com.abc.springboot.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.CommandLineRunner;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class Application2 implements CommandLineRunner {


    //第二步：通過容器獲取bean，并注入給userService
    @Autowired
    private UserService userService;


    public static void main(String[] args) {
        //第一步：SpringBoot的啟動程序，會初始化spring容器
        SpringApplication.run(Application2.class,args);
    }

    //覆蓋接口中的run方法
    @Override
    public void run(String... args) throws Exception {

        //第三步：容器啟動后調(diào)用run方法，在該方法中調(diào)用業(yè)務(wù)方法
        String sayHello = userService.sayHello();

        System.out.println(sayHello);

    }
}

小Tip

1.關(guān)閉SpringBoot Logo圖標(biāo)及啟動日志

項(xiàng)目名稱：027-springboot-logo-01

package com.abc.springboot;

import org.springframework.boot.Banner;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class Application {

    public static void main(String[] args) {

        SpringApplication springApplication = new SpringApplication(Application.class);

        //關(guān)閉啟動logo和啟動日志的輸出
        springApplication.setBannerMode(Banner.Mode.OFF);
        springApplication.run(args);

    }

}

修改完畢后，運(yùn)行程序查看效果

2.修改啟動的logo圖標(biāo)

項(xiàng)目名稱：028-springboot-logo-02

修改前LOGO

在src/main/resources放入banner.txt文件，該文件名字不能隨意，文件中的內(nèi)容就是要輸出的logo；

可以利用網(wǎng)站生成圖標(biāo)：http://patorjk.com/software/taag/，將生成好的圖標(biāo)文字粘貼到banner.txt文件中，然后將關(guān)閉logo輸出的語句注釋，啟動看效果。

修改后LOGO