java中怎么生成表格图表
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项目有个需求是生成上图的表格图表,本来excel很容易生成上边的表格图,但是java poi不支持在服务器端把excel表格导出成图片,在没有找到合适的工具库下,用java 2d实现同样图表。
这个表格图分成标题、表头、表中、表尾4个部分,
背景填充用:graphics.fillRect()
画线条用:graphics.drawLine()
画文字用:graphics.drawString()
主要用上边三个java 2d方法实现,剩下的就是各种坐标位置的计算。
实现代码:
package com.penngo.test; import javax.imageio.ImageIO; import java.awt.*; import java.awt.image.BufferedImage; import java.io.File; import java.util.Arrays; import java.util.List; public class ExcelChart { private Font titleFont = new Font("宋体",Font.BOLD,20); private Font headFont = new Font("宋体",Font.BOLD,16); private Font rowFont = new Font("宋体",Font.PLAIN,14); private Font bottomFont = new Font("宋体",Font.PLAIN,14); private Color titleBackgroup = new Color(237, 125, 49); // 标题背景色 private Color headBackgroup = new Color(252, 228, 214); // 表头背景色 private Color lineColor = new Color(237, 125,49); // 线条颜色 private int titleMargin = 8; private int headMargin = 8; private int rowMargin = 5; private int bottomMargin = 5; private int width; private int height; private int widthMargin = 10; // x横轴边距 private int heightMargin = 10; // y轴边框 /** * 将图片保存到指定位置 * @param image 缓冲文件类 * @param fileLocation 文件位置 */ public void createImage(BufferedImage image, File fileLocation) { try { ImageIO.write(image, "png", fileLocation); } catch (Exception e) { e.printStackTrace(); } } /** * 字符串总宽度 * @param g * @param str * @return */ private int getStringWidth(Graphics g,String str) { char[] strcha=str.toCharArray(); int strWidth = g.getFontMetrics().charsWidth(strcha, 0, str.length()); return strWidth; } //字符高度 private int getStringHeight(Graphics g) { int height = g.getFontMetrics().getHeight(); return height; } private int calculateImageHeight(int rowCount){ BufferedImage image = new BufferedImage(100, 100,BufferedImage.TYPE_INT_RGB); Graphics graphics = image.getGraphics(); graphics.setFont(titleFont); int titleRowHeight = getStringHeight(graphics) + titleMargin * 2; graphics.setFont(headFont); int headRowHeight = getStringHeight(graphics) + headMargin * 2; graphics.setFont(rowFont); int rowHeight = getStringHeight(graphics) + rowMargin * 2; graphics.setFont(bottomFont); int bottomRowHeight = getStringHeight(graphics) + bottomMargin * 2; int height = widthMargin * 2 + titleRowHeight + headRowHeight + rowHeight * rowCount + bottomRowHeight; return height; } public void createTableChart(File img, String title, String bottomTitle, ListheadList, List > rows, int width){ widthMargin = 10; heightMargin = 10; this.width = width; this.height = calculateImageHeight(rows.size()); BufferedImage image = new BufferedImage(width, height,BufferedImage.TYPE_INT_RGB); Graphics graphics = image.getGraphics(); ((Graphics2D)graphics).setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING, RenderingHints.VALUE_TEXT_ANTIALIAS_ON); ((Graphics2D)graphics).setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON); graphics.setColor(Color.WHITE); graphics.fillRect(0,0, width, height); int rowWidth = (width - widthMargin * 2) / headList.size(); // 线条颜色 Color lineColor = new Color(237, 125,49); // 创建标题背景 int xTitle = widthMargin; int yTitle = heightMargin; graphics.setFont(getTitleFont()); int titleHeight = getStringHeight(graphics); writeTitle(xTitle, yTitle, titleHeight, title, graphics); // 创建表头 int xHead = widthMargin; int yHead = yTitle + titleHeight + titleMargin * 2; graphics.setFont(getHeadFont()); int headHeight = getStringHeight(graphics); writeHead(xHead, yHead,rowWidth, headHeight, headList,graphics); // 表格内容 int xRow = widthMargin; int yRow = yHead + headHeight + headMargin * 2; graphics.setFont(rowFont); int rowHeight = getStringHeight(graphics); writeRow(xRow, yRow, rowWidth,rowHeight,headList, rows, graphics); // 表格底部 int xBottom = widthMargin; int yBottom = yRow + (rowHeight + rowMargin * 2) * rows.size(); graphics.setFont(bottomFont); int bottomHeight = getStringHeight(graphics); writeBottom(xBottom, yBottom, bottomHeight, bottomTitle, graphics); // 保存图片 createImage(image, img); } private void writeTitle(int xTitle, int yTitle, int titleHeight, String title, Graphics graphics){ int titleWidth = getStringWidth(graphics, title); graphics.setColor(getTitleBackgroup()); graphics.fillRect(xTitle,yTitle, width - widthMargin * 2 + 1, titleHeight + titleMargin * 2); // 标题文字 graphics.setColor(Color.WHITE); graphics.drawString(title, widthMargin + (width - widthMargin * 2)/2 - titleWidth / 2, heightMargin + titleHeight + titleMargin - 3); } private void drawString(Graphics graphics, String txt, int x, int y){ Graphics2D g2d = (Graphics2D)graphics; g2d.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING, RenderingHints.VALUE_TEXT_ANTIALIAS_ON);//设置抗锯齿 g2d.setPaint(new Color(0, 0, 0, 64));//阴影颜色 g2d.drawString(txt, x, y);//先绘制阴影 g2d.setPaint(Color.BLACK);//正文颜色 g2d.drawString(txt, x, y);//用正文颜色覆盖上去 } /** * 写入表头文本 */ private void writeHead(int xHead, int yHead,int rowWidth, int headHeight, List
headList,Graphics graphics){ // 背景填充 graphics.setColor(getHeadBackgroup()); graphics.fillRect(xHead, yHead, width - widthMargin * 2, headHeight + headMargin * 2); // 表格竖线 graphics.setColor(getLineColor()); for(int i = 0;i < headList.size() + 1; i++){ graphics.drawLine(xHead + i * rowWidth, yHead, xHead + i * rowWidth, yHead + headHeight + headMargin * 2); } graphics.setColor(Color.BLACK); for(int i = 0; i < headList.size(); i++){ String str = headList.get(i); if(str.length() < 5){ graphics.drawString(str, xHead + i * rowWidth + headMargin, yHead + headHeight + headMargin); } else{ String t1 = str.substring(0, 5); int t1Width = getStringWidth(graphics, t1); graphics.drawString(t1, xHead + i * rowWidth + headMargin, yHead + headHeight - headMargin/2 + 1); String t2 = str.substring(5, str.length()); int t2Width = getStringWidth(graphics, t2); int tdx = (t1Width - t2Width) / 2; graphics.drawString(t2, xHead + i * rowWidth + headMargin + tdx, yHead + headHeight + headMargin + 3); } } } /** * 写入表数据 */ private void writeRow(int xRow, int yRow, int rowWidth,int rowHeight,List headList, List > rows,Graphics graphics){ // 画横线 int rowCount = rows.size() + 1; graphics.setColor(getLineColor()); for(int i = 0; i< rowCount; i++){ int y = yRow + i * (rowHeight + rowMargin * 2); graphics.drawLine(xRow, y, width - widthMargin, y); } // 画竖线 int colCount = headList.size() + 1; for(int c = 0; c < colCount; c++){ int x = xRow + c * rowWidth; int maxY = yRow + rows.size() * (rowHeight + rowMargin * 2); graphics.drawLine(x, yRow, x, maxY); } // 写入行数据 graphics.setColor(Color.BLACK); for(int r = 0; r < rows.size(); r++){ List
row = rows.get(r); for(int c = 0; c < row.size(); c++){ int x = xRow + rowMargin + c * rowWidth; int y = yRow + rowHeight + rowMargin+ r * (rowHeight + rowMargin * 2) - 2; // graphics.drawString(row.get(c), x, y); drawString(graphics, row.get(c), x, y); } } } private void writeBottom(int xBottom, int yBottom, int bottomHeight, String bottomTitle, Graphics graphics){ // 画横线 graphics.setColor(getLineColor()); graphics.drawLine(xBottom, yBottom + bottomHeight + bottomMargin * 2, width - widthMargin ,yBottom + bottomHeight + bottomMargin * 2); // 画竖线 graphics.drawLine(xBottom, yBottom, xBottom ,yBottom + bottomHeight + bottomMargin * 2); graphics.drawLine(width - widthMargin, yBottom, width - widthMargin ,yBottom + bottomHeight + bottomMargin * 2); graphics.setColor(Color.BLACK); int bottomTitleWidth = getStringWidth(graphics, bottomTitle); int x = width / 2 - bottomTitleWidth / 2; graphics.drawString(bottomTitle, x, yBottom + bottomHeight + bottomMargin); } public Font getTitleFont() { return titleFont; } public void setTitleFont(Font titleFont) { this.titleFont = titleFont; } public Font getHeadFont() { return headFont; } public void setHeadFont(Font headFont) { this.headFont = headFont; } public Font getRowFont() { return rowFont; } public void setRowFont(Font rowFont) { this.rowFont = rowFont; } public Font getBottomFont() { return bottomFont; } public void setBottomFont(Font bottomFont) { this.bottomFont = bottomFont; } public int getTitleMargin() { return titleMargin; } public void setTitleMargin(int titleMargin) { this.titleMargin = titleMargin; } public int getHeadMargin() { return headMargin; } public void setHeadMargin(int headMargin) { this.headMargin = headMargin; } public int getRowMargin() { return rowMargin; } public void setRowMargin(int rowMargin) { this.rowMargin = rowMargin; } public int getBottomMargin() { return bottomMargin; } public void setBottomMargin(int bottomMargin) { this.bottomMargin = bottomMargin; } public Color getLineColor() { return lineColor; } public void setLineColor(Color lineColor) { this.lineColor = lineColor; } public Color getTitleBackgroup() { return titleBackgroup; } public void setTitleBackgroup(Color titleBackgroup) { this.titleBackgroup = titleBackgroup; } public Color getHeadBackgroup() { return headBackgroup; } public void setHeadBackgroup(Color headBackgroup) { this.headBackgroup = headBackgroup; } public static void main(String[] args) throws Exception{ ExcelChart tableChart = new ExcelChart(); try { List titleList = Arrays.asList("名称","增幅","收入","收入净利润","今年收入增幅比例"); List > rows = Arrays.asList( Arrays.asList("项目收入1", "6.05%", "9.95亿", "1.83亿", "5.74‰"), Arrays.asList("项目收入2", "6.05%", "9.95亿", "1.83亿", "5.74‰"), Arrays.asList("项目收入3", "6.05%", "9.95亿", "1.83亿", "5.74‰"), Arrays.asList("项目收入4", "6.05%", "9.95亿", "1.83亿", "5.74‰"), Arrays.asList("项目收入5", "6.05%", "9.95亿", "1.83亿", "5.74‰"), Arrays.asList("项目收入6", "6.05%", "9.95亿", "1.83亿", "5.74‰"), Arrays.asList("项目收入7", "6.05%", "9.95亿", "1.83亿", "5.74‰"), Arrays.asList("项目收入8", "6.05%", "9.95亿", "1.83亿", "5.74‰"), Arrays.asList("项目收入9", "6.05%", "9.95亿", "1.83亿", "5.74‰"), Arrays.asList("项目收入10", "6.05%", "9.95亿", "1.83亿", "5.74‰") ); tableChart.setTitleBackgroup(new Color(237, 125, 49)); tableChart.setHeadBackgroup(new Color(252, 228, 214)); tableChart.setLineColor(new Color(237, 125, 49)); tableChart.createTableChart(new File("logs/tablechart1.png"), "我是标题一二三四五六七八九十","日期:9月10日 制图:https://my.oschina.net/penngo", titleList,rows,600); } catch (Exception e) { e.printStackTrace(); } } }
以上就是java中怎么生成表格图表,小编相信有部分知识点可能是我们日常工作会见到或用到的。希望你能通过这篇文章学到更多知识。更多详情敬请关注创新互联行业资讯频道。
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