[Java知识库]1.Spring源码通俗讲解之环境搭建

使用ctrl+N能查找类

在接口内部使用Ctr+H能查找实现类

ctrl + F12能查看类有啥方法

1 环境搭建

为了保持一致，Spring使用的版本是5.0.x,gradle使用的版本是4.4.1，JDK使用的版本是1.8(JDK8),IDEA使用的版本是2021.3。

1.1 Gradle安装

GRADLE_HOME,PATH,GRADLE_USER_HOME

maven本地仓库->所有的jar包，同理，gradle也有本地仓库，在gradle安装目录中新建gradle目录作为仓库：

配置下载阿里云镜像：

在gradle安装目录的init.d文件夹中新建init.gradle文件，并添加如下内容:

gradle.projectsLoaded {
    rootProject.allprojects {
        buildscript {
            repositories {
                def JCENTER_URL = 'https://maven.aliyun.com/repository/jcenter'
                def GOOGLE_URL = 'https://maven.aliyun.com/repository/google'
                def NEXUS_URL = 'http://maven.aliyun.com/nexus/content/repositories/jcenter'
                all { ArtifactRepository repo ->
                    if (repo instanceof MavenArtifactRepository) {
                        def url = repo.url.toString()
                        if (url.startsWith('https://jcenter.bintray.com/')) {
                            project.logger.lifecycle "Repository ${repo.url} replaced by $JCENTER_URL."
                            println("buildscript ${repo.url} replaced by $JCENTER_URL.")
                            remove repo
                        }
                        else if (url.startsWith('https://dl.google.com/dl/android/maven2/')) {
                            project.logger.lifecycle "Repository ${repo.url} replaced by $GOOGLE_URL."
                            println("buildscript ${repo.url} replaced by $GOOGLE_URL.")
                            remove repo
                        }
                        else if (url.startsWith('https://repo1.maven.org/maven2')) {
                            project.logger.lifecycle "Repository ${repo.url} replaced by $REPOSITORY_URL."
                            println("buildscript ${repo.url} replaced by $REPOSITORY_URL.")
                            remove repo
                        }
                    }
                }
                jcenter {
                    url JCENTER_URL
                }
                maven {
                    url NEXUS_URL
                }
            }
        }
        repositories {
            def JCENTER_URL = 'https://maven.aliyun.com/repository/jcenter'
            def GOOGLE_URL = 'https://maven.aliyun.com/repository/google'
            def NEXUS_URL = 'http://maven.aliyun.com/nexus/content/repositories/jcenter'
            all { ArtifactRepository repo ->
                if (repo instanceof MavenArtifactRepository) {
                    def url = repo.url.toString()
                    if (url.startsWith('https://jcenter.bintray.com/')) {
                        project.logger.lifecycle "Repository ${repo.url} replaced by $JCENTER_URL."
                        println("buildscript ${repo.url} replaced by $JCENTER_URL.")
                        remove repo
                    }
                    else if (url.startsWith('https://dl.google.com/dl/android/maven2/')) {
                        project.logger.lifecycle "Repository ${repo.url} replaced by $GOOGLE_URL."
                        println("buildscript ${repo.url} replaced by $GOOGLE_URL.")
                        remove repo
                    }
                    else if (url.startsWith('https://repo1.maven.org/maven2')) {
                        project.logger.lifecycle "Repository ${repo.url} replaced by $REPOSITORY_URL."
                        println("buildscript ${repo.url} replaced by $REPOSITORY_URL.")
                        remove repo
                    }
                }
            }
            jcenter {
                url JCENTER_URL
            }
            maven {
                url NEXUS_URL
            }
        }
    }
}

1.2 下载并打开项目

打开项目（本项目使用的版本是5.0.x）：

配置Gradle以及JDK:

如果速度慢，可以取消自动的下载，直接进行index

1.3 可能出现的问题：

1.No such property: values forclass:org.gradle.api.internal.tasks.DefaultTaskDependency Possible solutions: values

打开文件，并注释：

1.4 测试是否配置好环境

新建包 ：

配置build.gradle

plugins {
    id 'java'
}

group 'org.springframework'
version '5.0.21.BUILD-SNAPSHOT'

repositories {
    mavenCentral()
}

dependencies {
    testImplementation 'junit:junit:4.12'

    compile(project(":spring-context"))
    // https://mvnrepository.com/artifact/org.projectlombok/lombok
    compileOnly group: 'org.projectlombok', name: 'lombok', version: '1.18.20'
}

新建pojo.Person

package com.CodingInn.pojo;

import lombok.Data;

@Data
public class Person {
   private String name;
}

新建beans.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 class="com.CodingInn.pojo.Person" id="person">
      <property name="name" value="zhangsan"/>
   </bean>
</beans>

测试

package com.CodingInn;

import com.CodingInn.pojo.Person;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class test {
   public static void main(String[] args) {
      ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext("beans.xml");

      Person bean = context.getBean(Person.class);
      System.out.println(bean);
   }
}