Merge branch 'back' of https://github.com/java110/MicroCommunity into back

曾成

2020-03-28 983acc56b667c90804dbf5f46dae8f0161876380

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package com.java110.entity;
 
/**
 * Hello world!
 *
 */
public class App 
{
    public static void main( String[] args )
    {
        System.out.println( "Hello World!" );
    }
}