主要代码：

1. /*** 生成图片* @param cellsValue 以二维数组形式存放 表格里面的值* @param path 文件保存路径*/public void myGraphicsGeneration(String cellsValue[][], String path) {// 字体大小int fontTitileSize = 15;// 横线的行数int totalrow = cellsValue.length+1;// 竖线的行数int totalcol = 0;if (cellsValue[0]  != null) {totalcol = cellsValue[0].length;}// 图片宽度int imageWidth = 1024;// 行高int rowheight = 40;// 图片高度int imageHeight = totalrow*rowheight+50;// 起始高度int startHeight = 10;// 起始宽度int startWidth = 10;// 单元格宽度int colwidth = (int)((imageWidth-20)/totalcol);BufferedImage image = new BufferedImage(imageWidth, imageHeight,BufferedImage.TYPE_INT_RGB);Graphics graphics = image.getGraphics();graphics.setColor(Color.WHITE);graphics.fillRect(0,0, imageWidth, imageHeight);graphics.setColor(new Color(220,240,240));//画横线for(int j=0;j<totalrow; j++){graphics.setColor(Color.black);graphics.drawLine(startWidth, startHeight+(j+1)*rowheight, startWidth+colwidth*totalcol, startHeight+(j+1)*rowheight);}//画竖线for(int k=0;k<totalcol+1;k++){graphics.setColor(Color.black);graphics.drawLine(startWidth+k*colwidth, startHeight+rowheight, startWidth+k*colwidth, startHeight+rowheight*totalrow);}//设置字体Font font = new Font("微软雅黑",Font.BOLD,fontTitileSize);graphics.setFont(font);//写标题String title = "【指标完成进度】";graphics.drawString(title, startWidth, startHeight+rowheight-10);//写入内容for(int n=0;n<cellsValue.length;n++){for(int l=0;l<cellsValue[n].length;l++){if (n == 0) {font = new Font("微软雅黑",Font.BOLD,fontTitileSize);graphics.setFont(font);}else if (n > 0 && l >0) {font = new Font("微软雅黑",Font.PLAIN,fontTitileSize);graphics.setFont(font);graphics.setColor(Color.RED);} else {font = new Font("微软雅黑",Font.PLAIN,fontTitileSize);graphics.setFont(font);graphics.setColor(Color.BLACK);}graphics.drawString(cellsValue[n][l].toString(), startWidth+colwidth*l+5, startHeight+rowheight*(n+2)-10);}}// 保存图片createImage(image, path);}/*** 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, String fileLocation) {try {FileOutputStream fos = new FileOutputStream(fileLocation);BufferedOutputStream bos = new BufferedOutputStream(fos);JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(bos);encoder.encode(image);bos.close();} catch (Exception e) {e.printStackTrace();}}

2.测试代码

public static void main(String[] args) {DrawTableImg cg = new DrawTableImg();try {String tableData1[][] = {{"8月31日","累计用户数","目标值","完成进度","时间进度", "进度差异"}, {"掌厅客户端（户）","469281","1500000","31.2%","33.6%", "-2.4%"}};String[][] tableData2 = {{"8月31日（户）","新增用户数","日访问量","累计用户数","环比上月"},{"合肥和巢湖","469281","1500000","31.2%","33.6%"},{"芜湖","469281","1500000","31.2%","33.6%"},{"蚌埠","469281","1500000","31.2%","33.6%"},{"淮南","469281","1500000","31.2%","33.6%"},{"马鞍山","469281","1500000","31.2%","33.6%"},{"淮北","469281","1500000","31.2%","33.6%"}};cg.myGraphicsGeneration(tableData2, "c:\\myPic.jpg");} catch (Exception e) {e.printStackTrace();}}

3. 效果图