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## useful-regex.md

      
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              May 26, 2020 09:45
            
              
                [useful-regex.md] useful regex
              
          
    正则表达式：工具类之RegexUtils（正则工具类）
/******************** 正则相关常量 ********************/
/**
 * 正则：手机号（简单）
 */
public static final String REGEX_MOBILE_SIMPLE = "^[1]\\d{10}$";
/**
 * 正则：手机号（精确）

  
## ImageShrinkWithDpi.java

import java.awt.image.BufferedImage;
import java.io.IOException;

import net.coobird.thumbnailator.Thumbnails;

public class ImageShrinkWithDpi {

    public static BufferedImage shrink(BufferedImage image, int imgWidthInUserSpaceUnit, int dpi) throws IOException {
        int imageWidth = image.getWidth();

## AddUserAndGrantPrivileges.sql
------------- 查看用户 -----------
use mysql;
select host,user,password from user;

------------- 查看用户权限 --------
-- 查看本地root的权限，没有指定后面的localhost则默认为'%'
show grants for root@'localhost';
-- 查看指定host的root的权限
show grants for root@'192.168.122.12';

## ClassUtil.java

import java.net.MalformedURLException;
import java.net.URL;

import lombok.extern.slf4j.Slf4j;

/**
 * 参考: https://github.com/scijava/scijava-common/blob/scijava-common-2.62.1/src/main/java/org/scijava/util/ClassUtils.java#L296-L355
 * @author Yang Guanrong
 * @date 2020/04/10 12:30

	import java.awt.image.BufferedImage;
	import java.io.IOException;

	import net.coobird.thumbnailator.Thumbnails;

	public class ImageShrinkWithDpi {

	public static BufferedImage shrink(BufferedImage image, int imgWidthInUserSpaceUnit, int dpi) throws IOException {
	int imageWidth = image.getWidth();
	------------- 查看用户 -----------
	use mysql;
	select host,user,password from user;

	------------- 查看用户权限 --------
	-- 查看本地root的权限，没有指定后面的localhost则默认为'%'
	show grants for root@'localhost';
	-- 查看指定host的root的权限
	show grants for root@'192.168.122.12';

	import java.net.MalformedURLException;
	import java.net.URL;

	import lombok.extern.slf4j.Slf4j;

	/**
	* 参考: https://github.com/scijava/scijava-common/blob/scijava-common-2.62.1/src/main/java/org/scijava/util/ClassUtils.java#L296-L355
	* @author Yang Guanrong
	* @date 2020/04/10 12:30