SpringBoot-黑马-笔记

SpringBoot 是由 Pivotal 团队提供的全新框架，其设计目的是用来简化 Spring 应用的初始搭建以及开发过程。

• 1.SpringBoot快速入门
• • 起步依赖
  • 程序启动
• 2.配置文件
• • yaml配置文件数据读取
  • 多环境配置
  • 配置文件分类
• 整合第三方技术
• • SpringBoot整合junit
  • SpringBoot整合mybatis
  • SSM

Spring Initializr 方式创建的 Maven 工程的的 pom.xml 配置文件中自动生成了很多包含 starter 的依赖

• 大小写敏感
• 属性层级关系使用多行描述，每行结尾使用冒号结束
• 使用缩进表示层级关系，同层级左侧对齐，只允许使用空格（不允许使用Tab键）
  空格的个数并不重要，只要保证同层级的左侧对齐即可。
• 属性值前面添加空格（属性名与属性值之间使用冒号+空格作为分隔）
• #表示注释

package com.example.controller;

import com.example.domain.Enterprise;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.core.env.Environment;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
@RequestMapping("/books")
public class BookController {

    @Value("${lesson}")
    private String lesson;
    @Value("${server.port}")
    private Integer port;
    @Value("${enterprise.subject[0]}")
    private String subject_00;

    @Autowired
    private Environment environment;

    @Autowired
    private Enterprise enterprise;

    @GetMapping("/{id}")
    public String getById(@PathVariable Integer id){
        System.out.println(lesson);
        System.out.println(port);
        System.out.println(subject_00);
        System.out.println("===========");
        System.out.println(environment.getProperty("lesson"));
        System.out.println(environment.getProperty("server.port"));
        System.out.println(environment.getProperty("enterprise.age"));
        System.out.println(environment.getProperty("enterprise.subject[2]"));
        System.out.println("===========");
        System.out.println(enterprise);
        return "hello , spring boot!";
    }
}

#设置启用的环境
spring:
  profiles:
    active: test
---
spring:
  profiles: div
server:
  port: 80
---
spring:
  profiles: pro
server:
  port: 81
---
spring:
  profiles: test
server:
  port: 82

package com.itheima;

import com.itheima.service.BookService;
import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;

@SpringBootTest
class Sb07ApplicationTests {

    @Autowired
    private BookService bookService;

    @Test
    void contextLoads() {
        bookService.save();
    }

}

package com.itheima1;

import com.itheima.Sb07Application;
import com.itheima.service.BookService;
import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;

@SpringBootTest(classes = Sb07Application.class)
class Sb07ApplicationTests {

    @Autowired
    private BookService bookService;

    @Test
    void contextLoads() {
        bookService.save();
    }

}

spring:
  datasource:
    driver-class-name: com.mysql.cj.jdbc.Driver
    url: jdbc:mysql://localhost:3306/ssm_db?serverTimezone=UTC
    username: root
    password: 123456
    type: com.alibaba.druid.pool.DruidDataSource

package com.itheima.dao;

import com.itheima.domain.Book;
import org.apache.ibatis.annotations.Mapper;
import org.apache.ibatis.annotations.Select;

@Mapper
public interface BookDao {

    @Select("select * from tbl_book where id = #{id}")
    public Book getById(Integer id);
}