我把Idea给改了，看看有没有你常用的功能，没有，你告诉我，我来改

package com.madou.dbtool.uml.cantainer;

import javax.swing.*;
import java.awt.*;

/**
 * 刻度尺面板类
 */
public class RuleContainer extends JPanel implements ScaleFunction {

    // 背景颜色
    Color backgroudColor = Color.BLACK;
    // 刻度颜色
    Color fontColor = Color.WHITE;
    // 是否垂直
    boolean isVertical = false;
    // 左边距
    int left = 0;
    // 缩放比例，每走一格+-5
    int scale = 100;

    public RuleContainer() {
        this(false,0);
    }

    public RuleContainer(int left) {
        this(false,left);
    }

    public RuleContainer(boolean isVertical, int left){
        this.setLayout(null);
        this.setBackground(Color.RED);
        this.setCursor(new Cursor(Cursor.CROSSHAIR_CURSOR));
        this.left = left;
        this.isVertical = isVertical;
        if(this.isVertical){
            this.setPreferredSize(new Dimension(20, -1));
        }else {
            this.setPreferredSize(new Dimension(-1, 20));
        }
    }

    public void drawX(Graphics graphics){
        int width = this.getWidth();
        int height = this.getHeight();
        int index = 0;
        int count = 0;
        double postion = left;
        int screenResolution = Toolkit.getDefaultToolkit().getScreenResolution();
        int step = (int) Math.round((screenResolution/25.4)/(scale/100F));
        Font font = Font.getFont("微软雅黑");
        graphics.setColor(fontColor);
        graphics.setFont(font);
        if(isVertical){
            if(scale<101) {
                height = (int) (height/(scale/100F));
            }
            while (postion<height){
                if(count%10==0){
                    graphics.drawLine(width/2,(int) postion,width,(int) postion);
                    graphics.drawString(""+index++, 0,(int) postion-1);
                }else{
                    if(count>0&&count%5==0){
                        graphics.drawLine(width * 3 / 5, (int) postion, width, (int) postion);
                    }else {
                        graphics.drawLine(width * 4 / 5, (int) postion, width, (int) postion);
                    }
                }
                postion+=step;
                count++;
            }
        }else{
            if(scale<101) {
                width = (int) (width / (scale / 100F));
            }
            while (postion<width){
                if(count%10==0){
                    graphics.drawLine((int) postion,height/2,(int) postion,height);
                    graphics.drawString(""+index++, (int) postion-3,height/2);
                }else{
                    if(count>0&&count%5==0){
                        graphics.drawLine((int) postion,height*3/5,(int) postion,height);
                    }else {
                        graphics.drawLine((int) postion,height*4/5,(int) postion,height);
                    }
                }
                postion+=step;
                count++;
            }
        }

    }

    @Override
    protected void paintComponent(Graphics graphics) {
        graphics.setColor(backgroudColor);
        graphics.fillRect(0,0,getWidth(),getHeight());
        drawX(graphics);
    }

    public static void main(String[] args) {
        JFrame jFrame = new JFrame("刻度尺");
        jFrame.setLayout(new BorderLayout());
        jFrame.setPreferredSize(new Dimension(600,600));
        RuleContainer scalePanel = new RuleContainer(false,30);
        jFrame.add(scalePanel,BorderLayout.NORTH);
        scalePanel = new RuleContainer(true,0);
        jFrame.add(scalePanel,BorderLayout.WEST);
        jFrame.setVisible(true);
        jFrame.pack();
    }

    @Override
    public void scale(int step) {
        scale+=step;
        if(scale<20){
            scale=20;
        }
        if(scale>500){
            scale=500;
        }
        applyZoom();
    }

    private void applyZoom() {
        setPreferredSize(new Dimension((int) (scale/100F * getWidth()), (int) (scale/100F * getHeight())));
        validate();
        repaint();
    }

    @Override
    public void reset() {
        scale=100;
        scale(0);
    }
}