java使用awt创建数据图片

偏执的太偏执、 2022-12-30 07:42 100阅读 0赞

package org.springblade.modules.exam.dto;
    
    import java.awt.Color;
    import java.awt.Font;
    
    
    public class Grid {
        private boolean show;
        private int row;    //对应Excel中的row,也可以理解为cells[i][j]的i
        private int col;    //对应Excel中的col,也可以理解为cells[i][j]的j
        private int x;  //x坐标
        private int y;  //y坐标
        private int width;
        private int height;
        private String text;
        private java.awt.Font font=new Font("微软雅黑",Font.PLAIN, 12);
        private java.awt.Color bgColor=null;
        private java.awt.Color ftColor=null;
        public int getRow() {
            return row;
        }
        public void setRow(int row) {
            this.row = row;
        }
        public int getCol() {
            return col;
        }
        public void setCol(int col) {
            this.col = col;
        }
        public int getX() {
            return x;
        }
        public void setX(int x) {
            this.x = x;
        }
        public int getY() {
            return y;
        }
        public void setY(int y) {
            this.y = y;
        }
        public boolean isShow() {
            return show;
        }
        public void setShow(boolean show) {
            this.show = show;
        }
        public int getWidth() {
            return width;
        }
        public void setWidth(int width) {
            this.width = width;
        }
        public int getHeight() {
            return height;
        }
        public void setHeight(int height) {
            this.height = height;
        }
        public String getText() {
            return text;
        }
        public void setText(String text) {
            this.text = text;
        }
        public Color getBgColor() {
            return bgColor;
        }
    
        public void setBgColor(java.awt.Color color){
            this.bgColor=color;
        }
    
        public Color getFtColor() {
            return ftColor;
        }
       
        public Font getFont() {
            return font;
        }
        public void setFont() {
           this.font=font;
        }
    
    
    
    }

package org.springblade.modules.exam.dto;
    
    import sun.awt.SunHints;
    import javax.imageio.ImageIO;
    import java.awt.*;
    import java.awt.image.BufferedImage;
    import java.io.File;
    import java.util.ArrayList;
    import java.util.List;
    
    /**
     *
     *
     */
    @Data
    public class ExerciseHistoryDTO1{
    	private static final long serialVersionUID = 1L;
    
    	public static void main(String[] args) throws Exception {
    		List<List<String>> list = new ArrayList<>();
    		List<String> array1 = new ArrayList<>();
    		array1.add("张三");
    		array1.add("李四");
    		array1.add("王五");
    		array1.add("赵六");
    		array1.add("张三");
    		array1.add("张三");
    		List<String> array2 = new ArrayList<>();
    		array2.add("张三");
    		array2.add("李四");
    		array2.add("王五");
    		array2.add("赵六");
    		array2.add("张三");
    		array2.add("张三");
    		List<String> array3 = new ArrayList<>();
    		array3.add("张三");
    		array3.add("李四");
    		array3.add("王五");
    		array3.add("赵六");
    		array3.add("张三");
    		array3.add("张三");
    		List<String> array4 = new ArrayList<>();
    		array4.add("张三");
    		array4.add("李四");
    		array4.add("王五");
    		array4.add("赵六");
    		array4.add("张三");
    		array4.add("张三");
    		List<String> array5 = new ArrayList<>();
    		array5.add("张三");
    		array5.add("李四");
    		array5.add("王五");
    		array5.add("赵六");
    		array5.add("张三");
    		array5.add("张三");
    		List<String> array6 = new ArrayList<>();
    		array6.add("张三");
    		array6.add("李四");
    		array6.add("王五");
    		array6.add("赵六");
    		array6.add("张三");
    		array6.add("张三");
    		list.add(array1);
    		list.add(array2);
    		list.add(array3);
    		list.add(array4);
    		list.add(array5);
    		list.add(array6);
    		int imageWidth = 0;//图片宽度
    		int imageHeight = 0;//图片高度
    		int rowSize = 6;
    		int colSize = 6;
    		int[] fromIndex = { 0, 0 };
    		int[] rowPixPos = new int[rowSize + 1];
    		rowPixPos[0] = 0;
    		int[] colPixPos = new int[colSize + 1];
    		colPixPos[0] = 0;
    		for (int i = 0; i < list.size(); i++) {
    			for (int j = 0; j < list.get(i).size(); j++) {
    				// 计算所求区域宽度
    				float widthPix = 237; // 设置宽度为237
    				if (i == fromIndex[0]) {
    					imageWidth += widthPix;
    				}
    				colPixPos[j+1] = (int) (widthPix * 1.15 + colPixPos[j]);
    			}
    			float heightPoint = 14; // 设置高度为14
    			imageHeight += heightPoint;
    			rowPixPos[i+1] = (int) (heightPoint * 96 / 72) + rowPixPos[i];
    
    		}
    
    		imageHeight = imageHeight * 96 / 72;
    		imageWidth = imageWidth * 115 / 100;
    		List<Grid> grids = new ArrayList<Grid>();
    		for (int i = 0; i < list.size(); i++) {
    			for (int j = 0; j < list.get(i).size(); j++) {
    				Grid grid = new Grid();
    				// 设置坐标和宽高
    				grid.setX(colPixPos[j]);
    				grid.setY(rowPixPos[i]);
    				grid.setWidth(colPixPos[j + 1] - colPixPos[j]);
    				grid.setHeight(rowPixPos[i + 1] - rowPixPos[i]);
    				grid.setRow(i);
    				grid.setCol(j);
    				grid.setShow(true);
    				// 单元格背景颜色
    				//CellStyle cs = cells[i][j].getCell().getCellStyle();
    				//grid.setFtColor(xf.getXSSFColor());
    				// 设置文本
    				String strCell =list.get(i).get(j);
    				grid.setText(strCell);
    				grids.add(grid);
    			}
    		}
    		BufferedImage image = new BufferedImage(imageWidth, imageHeight, BufferedImage.TYPE_INT_RGB);
    		Graphics2D g2d = image.createGraphics();
    		// 平滑字体
    		g2d.setRenderingHint(SunHints.KEY_ANTIALIASING, SunHints.VALUE_ANTIALIAS_OFF);
    		g2d.setRenderingHint(SunHints.KEY_TEXT_ANTIALIASING, SunHints.VALUE_TEXT_ANTIALIAS_DEFAULT);
    		g2d.setRenderingHint(SunHints.KEY_STROKE_CONTROL, SunHints.VALUE_STROKE_DEFAULT);
    		g2d.setRenderingHint(SunHints.KEY_TEXT_ANTIALIAS_LCD_CONTRAST, 140);
    		g2d.setRenderingHint(SunHints.KEY_FRACTIONALMETRICS, SunHints.VALUE_FRACTIONALMETRICS_OFF);
    		g2d.setRenderingHint(SunHints.KEY_RENDERING, SunHints.VALUE_RENDER_DEFAULT);
    		g2d.setColor(Color.white);
    		g2d.fillRect(0, 0, imageWidth, imageHeight);
    		// 绘制表格
    		for (Grid g : grids) {
    			// 绘制背景色
    			g2d.setColor(g.getBgColor() == null ? Color.white : g.getBgColor());
    			g2d.fillRect(g.getX(), g.getY(), g.getWidth(), g.getHeight());
    			// 绘制边框
    			g2d.setColor(Color.black);
    			g2d.setStroke(new BasicStroke(1));
    			g2d.drawRect(g.getX(), g.getY(), g.getWidth(), g.getHeight());
    
    			// 绘制文字,居中显示
    			g2d.setColor(Color.black);
    			Font font = g.getFont();
    			FontMetrics fm = g2d.getFontMetrics(font);
    			int strWidth = fm.stringWidth(g.getText());// 获取将要绘制的文字宽度
    			g2d.setFont(font);
    			g2d.drawString(g.getText(),
    				g.getX() + (g.getWidth() - strWidth) / 2,
    				g.getY() + (g.getHeight() - font.getSize()) / 2 + font.getSize());
    		}
    		g2d.dispose();
    		ImageIO.write(image, "png", new File("d:/test1.png"));
    		System.out.println("Output to PNG file Success!");
    	}
    
    
    }

## 效果展示： ##

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3ExNTEwMjc4MDcwNQ_size_16_color_FFFFFF_t_70][]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3ExNTEwMjc4MDcwNQ_size_16_color_FFFFFF_t_70]: /images/20221120/2c077f0d00804a1fb39c1ed8678f641a.png