随机生成指定长度的密码

代码分析
判断字符是否为空，空默认字符长度6，否则根据参数长度设置
字符串，我们需要在这里面随机获取数据
实例化随机类
实例化StringBuilder
for循环根据设置的长度，来给StringBuilder赋值
在str字符串中随机获取数据附加给StringBuilder
返回StringBuilder

/**
 * @author Mxhlin
 * @Email fuhua277@163.com
 * @Date 2022/09/15/20:19
 * @Version
 * @Description 随机生成指定长度的密码
 */
public class RandomPassword {

    /**
    * @Description: 生成密码
    * @Param: [n]
    * @return: java.lang.String
    * @Author: Mxhlin
    * @Date: 2022/9/15
    */
    public String getPassword(int... n) {
        int num = n.length == 0 ? 6 : n[0];
        String str =  "0123456789_-=+'\",`~!@#$%^&* ()abcdefghijklmnolpqrstuvwxyzABCDEFGHIJKLMNOLPQRSTUVWXYZ";
        Random ra = new Random();
        StringBuilder sb = new StringBuilder(6);

        for (int i = 0; i < num; i++) {
            sb.append(str.charAt(ra.nextInt(str.length())));
        }

        return sb.toString();
    }

    /**
    * @Description: 校验码
    * @Param: [n]
    * @return: java.lang.String
    * @Author: Mxhlin
    * @Date: 2022/9/15
    */
    public String checkcode(int n){
        String str ="0123456789abcdefghijklmnopqrstuzwsyzABCDEFGHIJKLMNOPQRSTUZWSYZ";
        Random random = new Random();
        StringBuilder sb = new StringBuilder(6);
        for (int i = 0; i < n; i++) {
            sb.append(str.charAt(random.nextInt(str.length())));
        }
        return sb.toString();
    }

}