安装IDEA并使用Idea创建java类型与spring类型的helloWorld
安装JDK8
网址：www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html
关于jdk8的安装可参考该博客：https://www.cnblogs.com/yybrhr/p/9811352.html
安装IDEA
网址：https://www.jetbrains.com/idea/
选择所需版本，Ultimate版功能更多（具体可见官方对比）但要付费（可破解），根据自己的需求选择，我选择的是Ultimate版。
下载完成后双击安装包一直点击next（注意：安装路径不要有中文）。
这里选择JetBrains,点击install进入安装。
IDEA破解教程
下载解压文件：https://pan.baidu.com/s/1GDX2699urWm033DmJJi2pw （提取码：te8j）
将刚下载的jar包添加到bin目录下
编辑bin目录下两个文件，文件末尾添加下面这句
idea.exe.vmoptions
idea64.exe.vmoptions
-javaagent:C:\Program Files\JetBrains\IntelliJ IDEA 2019.1.4\bin\jetbrains-agent.jar```
没有合适的编辑器可以先将文件改为txt，用记事本打开修改后再改回原来的的后缀
打开idea复制粘贴以下代码
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完成破解，打开idea，点击help->about查看成功破解
在IEDA中编写一个java类型的Hello World
打开idea,file->new->Project
选择project类型为java点击next
修改名字和存储路径（注意不要有中文），点击finish
在src中的.com文件中右键new->Java class，创建一个user类
创建测试类
点击绿色按钮成功运行
在IEDA中编写一个spring类型的Hello World
打开idea,file->new->Project
选择project类型为spring点击next
修改名字和存储路径（注意不要有中文），点击finish
先创建一个user类
创建一个配置文件，src->new->XML Configuration File->Spring Config，推荐命名为applicationContext
编辑配置文件
测试，编辑main类
点击绿色按钮成功运行
总结
在java开发中，实际是创建了一个User对象，调用了实例对象的name属性，调用了sayHello()方法；而在spring来发中，是创建了一个Spring的IOC容器对象，从容器对象中获取Bean实例，调用sayHello()方法。
参考
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[2] osc_cnd9jz7d的博客