spring源码学习_01 本地环境搭建

参考网上各种资源，终于把spring源码运行起来了；步骤总结如下：

spring版本： 5.2.x
本地系统mac
idea 2019.3.2 下载地址：https://www.jetbrains.com/idea/download/other.html
jdk 11 下载地址：https://repo.huaweicloud.com/java/jdk/

1. 前期准备

安装git、gradle；git的安装过程相对简单，这里只说gradle的安装；

在spring的github中可以看到需要安装的gradle的版本：

下载gradle 5.6.4：https://services.gradle.org/distributions/gradle-5.6.4-bin.zip

下载完毕之后，开始配置环境变量：

vim ~/.bash_profile
export PATH=$PATH:/opt/gradle/gradle-7.5.1/bin
source ~/.bash_profile

2. 下载spring源码

下载地址：https://gitcode.net/mirrors/spring-projects/spring-framework/-/tree/5.2.x/

下载到本地之后，解压；

3. 导入spring源码

通过File->Open的方式直接导入spring源码；

导入成功之后，如果未关联git会报如下错误：
org.gradle.process.internal.ExecException: Process ‘command ‘git’’ finished with non-zero exit value 128
操作如下：

git init .
git add .
git commit -am ‘init’
通过以上命令就可以解决；

修改gradle的配置：

1. build.gradle，增加阿里云镜像库

maven { url “https://maven.aliyun.com/nexus/content/groups/public/” }
maven { url “https://maven.aliyun.com/nexus/content/repositories/jcenter”}

2. settings.gradle

maven { url “https://maven.aliyun.com/nexus/content/groups/public/” }

3. gradle.properties

org.gradle.java.home=/Library/Java/JavaVirtualMachines/jdk-11.0.2.jdk/Contents/Home

增加VM Options

-Dfile.encoding=UTF-8

配置好以上，在控制台执行：

./gradlew :spring-oxm:compileTestJava

然后执行；

4. 验证

创建一个新module spring-demo

修改gradle名称

并向gradle中追加：

dependencies {
compile(project(“:spring-context”))
testCompile group: ‘junit’, name: ‘junit’, version: ‘4.12’
}

编写测试类：

public static void main(String[] args) {
	final AnnotationConfigApplicationContext ann = new AnnotationConfigApplicationContext("com.sxl");
	final Student student = (Student) ann.getBean("student");
	student.say();
}

运行结果：

5. 遇到的错

1. org.gradle.process.internal.ExecException: Process ‘command ‘git’’ finished with non-zero exit value 128
   将spring项目添加到git中就解决了；

2. Error:Kotlin: warnings found and -Werror specified
   两种方式：1
   
   
   如果还是报错，则：
   
   则找到所有的Kotin将其 -Werror去掉；

3. Error:Kotlin: [Internal Error] java.lang.LinkageError: loader constraint violation: loader org.jetbrains.kotlin.cli.jvm.plugins.PluginURLClassLoader$SelfThenParentURLClassLoader@53832173(instanceoforg.jetbrains.kotlin.cli.jvm.plugins.PluginURLClassLoader$SelfThenParentURLClassLoader, child of ‘bootstrap’) wants to load interface kotlin.sequences.Sequence. A different interface with the same name was previously loaded by ‘app’ (instance of jdk.internal.loader.ClassLoaders$AppClassLoader).
   at java.base/java.lang.ClassLoader.defineClass1(Native Method)
   at java.base/java.lang.ClassLoader.defineClass(ClassLoader.java:1016)
   at java.base/java.security.SecureClassLoader.defineClass(SecureClassLoader.java:174)
   at java.base/java.net.URLClassLoader.defineClass(URLClassLoader.java:550)
   at java.base/java.net.URLClassLoader$1.run(URLClassLoader.java:458)
   at java.base/java.net.URLClassLoader$1.run(URLClassLoader.java:452)atjava.base/java.security.AccessController.doPrivileged(NativeMethod)atjava.base/java.net.URLClassLoader.findClass(URLClassLoader.java:451)atorg.jetbrains.kotlin.cli.jvm.plugins.PluginURLClassLoader$SelfThenParentURLClassLoader.findClass(PluginURLClassLoader.kt:47)
   at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:588)
   at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:521)
   at java.base/java.lang.ClassLoader.defineClass1(Native Method)
   at java.base/java.lang.ClassLoader.defineClass(ClassLoader.java:1016)
   at java.base/java.security.SecureClassLoader.defineClass(SecureClassLoader.java:174)
   at java.base/java.net.URLClassLoader.defineClass(URLClassLoader.java:550)
   at java.base/java.net.URLClassLoader$1.run(URLClassLoader.java:458)
   at java.base/java.net.URLClassLoader$1.run(URLClassLoader.java:452)atjava.base/java.security.AccessController.doPrivileged(NativeMethod)atjava.base/java.net.URLClassLoader.findClass(URLClassLoader.java:451)atorg.jetbrains.kotlin.cli.jvm.plugins.PluginURLClassLoader$SelfThenParentURLClassLoader.findClass(PluginURLClassLoader.kt:47)
   at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:588)
   at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:521)
   at kotlin.coroutines.experimental.SequenceBuilderKt__SequenceBuilderKt.buildSequence(SequenceBuilder.kt:24)
   at org.jetbrains.kotlin.scripting.compiler.plugin.ScriptiDefinitionsFromClasspathDiscoverySourceKt.discoverScriptTemplatesInClasspath(ScriptiDefinitionsFromClasspathDiscoverySource.kt:53)
   at org.jetbrains.kotlin.scripting.compiler.plugin.ScriptDefinitionsFromClasspathDiscoverySource.(ScriptiDefinitionsFromClasspathDiscoverySource.kt:37)
   at org.jetbrains.kotlin.scripting.compiler.plugin.ScriptingCompilerConfigurationExtension.updateConfiguration(ScriptingCompilerConfigurationExtension.kt:56)

我是通过升级idea版本来解决的，最初是用的2018，升级到了2019解决了该问题；