概要

本文介绍使用IntelliJ IDEA搭建Spring Framework源代码环境，用于源代码阅读与debug。

环境搭建

1.下载源代码

访问Spring Framework在GitHub的地址，下载最新源代码。本人在下载时，版本号为5.2.2.BUILD-SNAPSHOT

https://github.com/spring-projects/spring-framework

2.根据说明导入IntelliJ IDEA

根据源代码文件中的IDEA导入说明进行操作，说明文件为源代码根目录的import-into-idea.md

Precompile `spring-oxm` with `./gradlew :spring-oxm:compileTestJava`
Import into IntelliJ (File -> New -> Project from Existing Sources -> Navigate to directory -> Select build.gradle)
When prompted exclude the `spring-aspects` module (or after the import via File-> Project Structure -> Modules)
Code away

• 1.需要预编译spring-oxm，通过控制台，进入到Spring Framework目录，运行命令gradlew :spring-oxm:compileTestJava。
  注：Spring Framework是通过Gradle进行的编译打包，故需要提前安装Gradle
• 2.导入至IDEA中， 操作方法：File -> New -> Project from Existing Sources -> Navigate to directory -> Select build.gradle
  
• 3.排除spring-aspects模块，因IDEA的问题该模块不会被识别，如不排除则会提示编译错误。
  操作方法：spring-aspects右键 -> Load/Unload modules -> 添加spring-aspects为Unloaded modules
  

  测试DEMO

  在源代码项目目录下，本人直接创建了一个Maven测试项目，并创建了一个简单的Bean注册于获取的例子。

  pom.xml

<?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/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>cn.daiwuliang</groupId>
  <artifactId>demo</artifactId>
  <version>1.0-SNAPSHOT</version>
  <name>demo</name>
  <!-- FIXME change it to the project's website -->
  <url>http://www.example.com</url>
  <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <maven.compiler.source>1.8</maven.compiler.source>
    <maven.compiler.target>1.8</maven.compiler.target>
  </properties>
  <dependencies>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>4.11</version>
      <scope>test</scope>
    </dependency>
      <!-- 引入commons-logging依赖 -->
      <dependency>
          <groupId>commons-logging</groupId>
          <artifactId>commons-logging</artifactId>
          <version>1.2</version>
      </dependency>
  </dependencies>
  <build>
    <pluginManagement><!-- lock down plugins versions to avoid using Maven defaults (may be moved to parent pom) -->
      <plugins>
        <!-- clean lifecycle, see https://maven.apache.org/ref/current/maven-core/lifecycles.html#clean_Lifecycle -->
        <plugin>
          <artifactId>maven-clean-plugin</artifactId>
          <version>3.1.0</version>
        </plugin>
        <!-- default lifecycle, jar packaging: see https://maven.apache.org/ref/current/maven-core/default-bindings.html#Plugin_bindings_for_jar_packaging -->
        <plugin>
          <artifactId>maven-resources-plugin</artifactId>
          <version>3.0.2</version>
        </plugin>
        <plugin>
          <artifactId>maven-compiler-plugin</artifactId>
          <version>3.8.0</version>
        </plugin>
        <plugin>
          <artifactId>maven-surefire-plugin</artifactId>
          <version>2.22.1</version>
        </plugin>
        <plugin>
          <artifactId>maven-jar-plugin</artifactId>
          <version>3.0.2</version>
        </plugin>
        <plugin>
          <artifactId>maven-install-plugin</artifactId>
          <version>2.5.2</version>
        </plugin>
        <plugin>
          <artifactId>maven-deploy-plugin</artifactId>
          <version>2.8.2</version>
        </plugin>
        <!-- site lifecycle, see https://maven.apache.org/ref/current/maven-core/lifecycles.html#site_Lifecycle -->
        <plugin>
          <artifactId>maven-site-plugin</artifactId>
          <version>3.7.1</version>
        </plugin>
        <plugin>
          <artifactId>maven-project-info-reports-plugin</artifactId>
          <version>3.0.0</version>
        </plugin>
      </plugins>
    </pluginManagement>
  </build>
</project>

TestDemo

package demo.test;
public class TestDemo {
    public String test(String str) {
        return String.format("ECHO: %s", str);
    }
}

App.java

package demo.test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.FileSystemXmlApplicationContext;
public class App {
    public static void main(String[] args) {
        String XMLPath = "D:\\spring-framework-master\\demo\\src\\main\\java\\demo\\test\\spring-config.xml";
        ApplicationContext applicationContext = new FileSystemXmlApplicationContext(XMLPath);
        TestDemo td = (TestDemo) applicationContext.getBean("testDemo");
        System.out.println(td.test("Hello World!!!"));
    }
}

spring-config.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
       http://www.springframework.org/schema/beans/spring-beans.xsd">
    <bean id="testDemo" class="demo.test.TestDemo"/>
</beans>

运行问题

1. Demo模块需要添加相应的spring模块的依赖，添加方式：File -> Project Structure -> Dependencies，目前Demo中仅实现了简单的例子，故只添加了如下几个模块：
   
2. spring-core中缺少commons-logging的依赖
   虽然已经在demo的pom中添加了依赖，但仍旧报错，本人的解决办法为在spring-core的spring-core.gradle再添加一次，并重新构建

   dependencies {
    ......
    compile("commons-logging:commons-logging:1.2")
   }
   

3. CoroutinesRegistrar中找不到变量CoroutinesUtils
   CoroutinesUtils位于spring-core目录下的kotlin-coroutines中，看结构其为一个独立的模块，并且spring-core并未关联依赖。
   找到kotlin-coroutines/build/libs/kotlin-coroutines-5.2.2.BUILD-SNAPSHOT.jar->右键Add as Library

至此，运行App中的main方法，得到以下结果:

Hello World!