學習的內容主要是汪雲飛的《Spring Boot實戰》

（一）命令列引數配置

springboot專案可以基於jar包執行，開啟jar的程式可以通過下面命令列執行：

java -jar xxx.jar

可以通過以下命令修改tomcat埠號

java -jar xxx.jar --server.port=9090

（二）常規屬性配置

在springboot專案中，我們只需在application.properties定義屬性，直接使用@Value注入即可

（1）application.properties中新增屬性

book.author=wangyunfei
book.name
 
=spring boot

（2）修改入口類

package com.vincent.demo;

import com.vincent.demo.config.Author;
import com.vincent.demo.config.HelloService;
import com.vincent.demo.config.TestService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
 
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.EnableAspectJAutoProxy;
import org.springframework.scheduling.annotation.EnableAsync;
import org.springframework.scheduling.annotation.EnableScheduling;
 
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
@SpringBootApplication
public class DemoApplication {

    @Value("${book.author}")
    private String bookAuthor;

    @Value("${book.name}")
    private String bookName;

    @RequestMapping("/")
    String index(){
        return "book name is :" + bookName + " and book author is: " + bookAuthor;
    }

    public static void main(String[] args) {
        SpringApplication.run(DemoApplication.class, args);
    }

}

（三）型別安全的配置（基於properties）

通過@ConfigurationProperties將properties屬性和一個Bean及其相關屬性關聯、從而實現型別安全的配置

（1）新增配置，在application.properties上新增：

author.name=wyf
author.age=32

（2）型別安全的Bean，程式碼如下：

package com.vincent.demo.config;

import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.stereotype.Component;

/**
 * @author rw
 * @date 2018/12/17 下午9:50
 */
@Component
//載入properties檔案內的配置，通過prefix屬性指定properties的配置的字首，通過locations指定properties檔案的位置
@ConfigurationProperties(prefix = "author")
public class Author {

    private String name;

    private Integer age;

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public Integer getAge() {
        return age;
    }

    public void setAge(Integer age) {
        this.age = age;
    }
}

（3）可以用@Autowired直接注入該配置

package com.vincent.demo;

import com.vincent.demo.config.Author;
import com.vincent.demo.config.HelloService;
import com.vincent.demo.config.TestService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.EnableAspectJAutoProxy;
import org.springframework.scheduling.annotation.EnableAsync;
import org.springframework.scheduling.annotation.EnableScheduling;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
@SpringBootApplication
public class DemoApplication {

    @Value("${book.author}")
    private String bookAuthor;

    @Value("${book.name}")
    private String bookName;

    @Autowired
    Author author;

    @RequestMapping("/")
    String index(){
        return "book name is :" + bookName + " and book author is: " + bookAuthor + " author.name is:" + author.getName();
    }public static void main(String[] args) {
        SpringApplication.run(DemoApplication.class, args);
    }

}