JAVA随机生成字符串

import org.apache.commons.lang3.RandomStringUtils;

public class App

{

    public static void main( String[] args )

    {

        System.out.println( RandomStringUtils.random(5));

    }

}

maven库  

<dependency>

        <groupId>org.apache.commons</groupId>

        <artifactId>commons-lang3</artifactId>

        <version>3.4</version>
 </dependency>