【java】使用mysql+java绘制Excel二维表格

本文是使用java语言对于后台的数据进行绘制，由于所用到的表格的长度较长，直接使用.xlsx后缀的Excel表

1、首先要导入数据库的jar包，以及读取excel的jar包

2、
public static void main(String[] args) throws Exception{
String fileName = "C:\\分词\\test.xlsx";
Test upload = new Test();
upload.getExcelData(fileName,".xlsx");
}

3、判断excel版本

//判断excel版本static Workbook openWorkbook(InputStream in,String filename,String fileFileName)throws IOException{    Workbook wb = null;    if(fileFileName.endsWith(".xlsx")){        wb = new XSSFWorkbook(in);//Excel 2007    } else {        wb = (Workbook) new HSSFWorkbook(in);//Excel 2003    }    return wb;}

4、

public static void getExcelData(String fileName,String fileFileName) throws Exception {    OutputStream out = null;    InputStream in = new FileInputStream(fileName); //创建输入流    Workbook wb = openWorkbook(in, fileName,fileFileName);// 获取Excel文件对象    Sheet sheet = wb.getSheetAt(0);// 获取文件的指定工作表m 默认的第一个    out =  new FileOutputStream(fileName);

5、

System.out.println("===========正在导入横坐标============");    String sql = null;    DBHelper db1;    ResultSet ret = null;    sql = "select * from table ";//SQL语句    db1 = new DBHelper(sql);//创建DBHelper对象    ret = db1.pst.executeQuery();//执行语句，得到结果集    int xLocation = 1;    Row row0 = sheet.createRow(0);    while (ret.next()) {        Cell first0 = row0.createCell(xLocation);        String keyword = ret.getString(2);        first0.setCellValue(keyword);        xLocation ++ ;    }    db1.close();    ret.close();

6、

System.out.println("==========正在导入纵坐标=======");    DBHelper dbY;    ResultSet retY = null;    String sqlY = "select distinct paperid from co_word_ty ";//SQL语句    dbY = new DBHelper(sqlY);//创建DBHelper对象    retY = dbY.pst.executeQuery();//执行语句，得到结果集   // out =  new FileOutputStream(fileName);    int yLocation = 1;    while (retY.next()) {        Row rowY = sheet.createRow(yLocation);        Cell fristY = rowY.createCell(0);        String paperid = retY.getString(1);        fristY.setCellValue(paperid);        yLocation ++;    }    dbY.close();    retY.close();

7、

/*     *      * 初始化数据表     */    /*System.out.println("==================正在初始化表格=================");    int rowNumber = sheet.getLastRowNum();    for(int i = 1;i <= rowNumber;i++){        Row rowXY = sheet.getRow(i);        int cellNumber = rowXY.getLastCellNum();        for(int j=1;j<= xLocation-1;j++){            System.out.println(j);            Cell fristXY = rowXY.createCell(j);            fristXY.setCellValue(0);        }    }*/

8、

/*     *      * 填充数据     */    System.out.println("==================正在输出数据=================");    DBHelper dbXYData;    ResultSet retXYData = null;    String sqlXYData = "select locationX,locationY from co_word_ty ";//SQL语句    dbXYData = new DBHelper(sqlXYData);    retXYData = dbXYData.pst.executeQuery();    while (retXYData.next()) {        String x = retXYData.getString(1);        String y = retXYData.getString(2);        //System.out.println(x);        if(x != null && x != ""){            System.out.println(Integer.parseInt(x)+"======================="+Integer.parseInt(y));            Row rowXYData = sheet.getRow(Integer.parseInt(y));            Cell fristXYData = rowXYData.createCell(Integer.parseInt(x));            fristXYData.setCellValue(1);        }    }    dbXYData.close();    retXYData.close();    wb.write(out);     System.out.println("=====================done===================");