Spring技术栈 on 测试开发刚哥

Java持久层框架Mybatis入门

Wed, 14 Jan 2026 00:00:00 +0000

本书作者：测试开发刚哥，文章版权归个人所有，未经授权请勿转载。

MyBatis是什么

MyBatis是Java的持久层框架，GitHub的star数高达15.8k，是Java技术栈中最热门的ORM框架之一。它支持自定义SQL、存储过程以及高级映射，可以通过XML或注解来配置和映射原始类型、接口和Java POJOs为数据库中的记录。

POJOs，Plain Old Java Objects，纯的传统意义的Java对象，最基本的Java Bean只有属性加上属性的get和set方法。

安装

Maven pom.xml：

<dependency>
  <groupId>org.mybatis</groupId>
  <artifactId>mybatis</artifactId>
  <version>x.x.x</version>
</dependency>

版本查询：https://mvnrepository.com/artifact/org.mybatis/mybatis

SqlSessionFactory

SqlSessionFactory的实例是每个MyBatis应用的核心，通过SqlSessionFactoryBuilder创建，能基于XML配置，也能使用Configuration类。

基于XML配置：

String resource = "org/mybatis/example/mybatis-config.xml";
InputStream inputStream = Resources.getResourceAsStream(resource);
SqlSessionFactory sqlSessionFactory =
  new SqlSessionFactoryBuilder().build(inputStream);

实际项目中不会手动设置XML文件路径，而是直接读取classpath去找XML。

使用Configuration类：

DataSource dataSource = BlogDataSourceFactory.getBlogDataSource();
TransactionFactory transactionFactory =
  new JdbcTransactionFactory();
Environment environment =
  new Environment("development", transactionFactory, dataSource);
Configuration configuration = new Configuration(environment);
configuration.addMapper(BlogMapper.class);
SqlSessionFactory sqlSessionFactory =
  new SqlSessionFactoryBuilder().build(configuration);

由于Java注解的一些限制以及某些MyBatis映射的复杂性，MyBatis会优先选择XML配置。在上面的示例中，MyBatis会根据classpath和BlogMapper.class去找BlogMapper.xml。

跟着官方文档学Maven构建生命周期

Tue, 13 Jan 2026 00:00:00 +0000

在IntelliJ IDEA中，显示了Maven的Lifecycle：

对IoC容器和Bean的学习笔记

Mon, 12 Jan 2026 00:00:00 +0000

本书作者：测试开发刚哥，文章版权归个人所有，未经授权请勿转载。

What We Mean by “Spring”

The term “Spring” means different things in different contexts. It can be used to refer to the Spring Framework project itself, which is where it all started. Over time, other Spring projects have been built on top of the Spring Framework. Most often, when people say “Spring”, they mean the entire family of projects. This reference documentation focuses on the foundation: the Spring Framework itself.

SpringBoot官方笔记8其他

Sun, 11 Jan 2026 00:00:00 +0000

本书作者：测试开发刚哥，文章版权归个人所有，未经授权请勿转载。

Container Images

FROM eclipse-temurin:17-jre as builder
WORKDIR application
ARG JAR_FILE=target/*.jar
COPY ${JAR_FILE} application.jar
RUN java -Djarmode=layertools -jar application.jar extract

FROM eclipse-temurin:17-jre
WORKDIR application
COPY --from=builder application/dependencies/ ./
COPY --from=builder application/spring-boot-loader/ ./
COPY --from=builder application/snapshot-dependencies/ ./
COPY --from=builder application/application/ ./
ENTRYPOINT ["java", "org.springframework.boot.loader.JarLauncher"]

$ docker build --build-arg JAR_FILE=path/to/myapp.jar .

Production-ready Features

The spring-boot-actuator module provides all of Spring Boot’s production-ready features.

<dependencies>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-actuator</artifactId>
    </dependency>
</dependencies>

Endpoints

Actuator endpoints let you monitor and interact with your application. Spring Boot includes a number of built-in endpoints and lets you add your own. For example, the health endpoint provides basic application health information.

SpringBoot官方笔记7IO

Sat, 10 Jan 2026 00:00:00 +0000

本书作者：测试开发刚哥，文章版权归个人所有，未经授权请勿转载。

Caching

Spring Boot auto-configures the cache infrastructure as long as caching support is enabled by using the @EnableCaching annotation.

import org.springframework.cache.annotation.Cacheable;
import org.springframework.stereotype.Component;

@Component
public class MyMathService {

    @Cacheable("piDecimals")
    public int computePiDecimal(int precision) {
        ...
    }

}

Before invoking computePiDecimal, the abstraction looks for an entry in the piDecimals cache that matches the i argument. If an entry is found, the content in the cache is immediately returned to the caller, and the method is not invoked. Otherwise, the method is invoked, and the cache is updated before returning the value.

SpringBoot官方笔记6消息

Fri, 09 Jan 2026 00:00:00 +0000

The Spring Framework provides extensive support for integrating with messaging systems, from simplified use of the JMS API using JmsTemplate to a complete infrastructure to receive messages asynchro

SpringBoot官方笔记5Data

Thu, 08 Jan 2026 00:00:00 +0000

Spring Boot integrates with a number of data technologies, both SQL and NoSQL.

SpringBoot官方笔记4Web

Wed, 07 Jan 2026 00:00:00 +0000

Most web applications use the spring-boot-starter-web module to get up and running quickly. You can also choose to build reactive web applications by using the spring-boot-starter-webflux module.

SpringBoot官方笔记3核心

Tue, 06 Jan 2026 00:00:00 +0000

本书作者：测试开发刚哥，文章版权归个人所有，未经授权请勿转载。

SpringApplication

By default, INFO logging messages are shown, including some relevant startup details, such as the user that launched the application.

Lazy Initialization

When lazy initialization is enabled, beans are created as they are needed rather than during application startup.

spring.main.lazy-initialization=true

@Lazy(false) annotation：disable lazy initialization for certain beans

Customizing the Banner

adding a banner.txt file to your classpath or by setting the spring.banner.location property to the location of such a file. If the file has an encoding other than UTF-8, you can set spring.banner.charset.

SpringBoot官方笔记2使用

Mon, 05 Jan 2026 00:00:00 +0000

本书作者：测试开发刚哥，文章版权归个人所有，未经授权请勿转载。

Build Systems

选择Maven or Gradle，而不要Ant（not particularly well supported）

In practice, you do not need to provide a version for any of these dependencies (spring-boot-dependencies) in your build configuration, as Spring Boot manages that for you. When you upgrade Spring Boot itself, these dependencies are upgraded as well in a consistent way.

Each release of Spring Boot is associated with a base version of the Spring Framework.

Starters are a set of convenient dependency descriptors that you can include in your application.

SpringBoot官方笔记1入门

Sun, 04 Jan 2026 00:00:00 +0000

Spring Boot helps you to create stand-alone, production-grade Spring-based applications that you can run. Most Spring Boot applications need very little Spring configuration.

关于SpringBoot开发的更多细节

Sat, 03 Jan 2026 00:00:00 +0000

在上篇文章《开发你的第一个SpringBoot应用》已经对SpringBoot基本开发流程有了大体了解，本文将继续对SpringBoot官网进行学习，发现关于SpringBoot开发的更多细节。

开发你的第一个SpringBoot应用

Fri, 02 Jan 2026 00:00:00 +0000

创建SpringBoot项目最便捷的方式一是在https://start.spring.io/根据步骤选择后，下载项目工程压缩包：

SpringBoot简介与安装

Thu, 01 Jan 2026 00:00:00 +0000

本书作者：测试开发刚哥，文章版权归个人所有，未经授权请勿转载。

SpringBoot简介

SpringBoot是Java技术栈的一个Web开发框架，在整个Web开发框架领域中，说SpringBoot是最成熟、最稳定、生态最强大的，一点也不为过。它最伟大的变革是让Java的Web框架也变得便捷起来，开箱即用，只需要简单配置就能快速搭建起一个后端应用，这也是它出现后迅速抢占市场，实现技术更替的重要原因。

除了Web应用开发外，SpringBoot还提供了内嵌服务器（Tomcat等）、安全、监控、健康检查等能力。

SpringBoot安装

本文主要介绍Maven这种方式：

第一步，安装Java，SpringBoot 2.5.6版本需要Java8及以上版本，最新的Java17也兼容。
第二步，安装Maven，不需要单独安装，下载一个IntelliJ就可以了，详细步骤可以参考我博客中这篇文章：

001-2021年搭建Java环境最快办法

第三步，在pom.xml中配置SpringBoot：

<?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>

    <groupId>com.example</groupId>
    <artifactId>myproject</artifactId>
    <version>0.0.1-SNAPSHOT</version>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.5.6</version>
    </parent>

    <!-- Additional lines to be added here... -->

</project>

下篇文章《开发你的第一个SpringBoot应用》将继续探究SpringBoot安装后的使用。

参考资料：

https://docs.spring.io/spring-boot/docs/current/reference/htmlsingle/#getting-started