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Descargue el paquete jxl y consúltelo
jxl.jar : biblioteca de herramientas Java para operar tablas de Excel. Esta es una biblioteca de clases tipo .jar, esta API es Java pura y no depende del sistema Windows, integra y encapsula algunas clases y métodos para operar y procesar tablas de Excel.
Haga clic en archivo->estructura del proyecto->bibliotecas->agregue el jxl.jar descargado en IDEA
Uso básico
package test;
import java.io.File;
import java.io.IOException;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.Date;
import jxl.CellType;
import jxl.Workbook;
import jxl.format.Alignment;
import jxl.format.Border;
import jxl.format.BorderLineStyle;
import jxl.format.Colour;
import jxl.format.ScriptStyle;
import jxl.format.UnderlineStyle;
import jxl.format.VerticalAlignment;
import jxl.read.biff.BiffException;
import jxl.write.Blank;
import jxl.write.DateFormat;
import jxl.write.DateFormats;
import jxl.write.DateTime;
import jxl.write.Formula;
import jxl.write.Label;
import jxl.write.Number;
import jxl.write.NumberFormat;
import jxl.write.WritableCell;
import jxl.write.WritableCellFeatures;
import jxl.write.WritableCellFormat;
import jxl.write.WritableFont;
import jxl.write.WritableHyperlink;
import jxl.write.WritableImage;
import jxl.write.WritableSheet;
import jxl.write.WritableWorkbook;
import jxl.write.WriteException;
public class ExcelTest {
public static void main(String[] args) throws IOException, BiffException, WriteException {
Workbook wb = Workbook.getWorkbook(new File("src\\test\\test.xls")); // 获得原始文档
WritableWorkbook workbook = Workbook.createWorkbook(new File("d:\\test_modified.xls"),wb); // 创建一个可读写的副本
/**
* 定义与设置Sheet
*/
WritableSheet sheet = workbook.getSheet(0);
sheet.setName("修改后"); // 给sheet页改名
workbook.removeSheet(2); // 移除多余的标签页
workbook.removeSheet(3);
sheet.mergeCells(0, 0, 4, 0); // 合并单元格
sheet.setRowView(0, 600); // 设置行的高度
sheet.setColumnView(0, 30); // 设置列的宽度
sheet.setColumnView(1, 20); // 设置列的宽度
WritableCell cell = null;
WritableCellFormat wcf = null;
Label label = null;
WritableCellFeatures wcfeatures = null;
// 更改标题字体
cell = sheet.getWritableCell(0,0);
WritableFont titleWf = new WritableFont(WritableFont.createFont("仿宋_GB2312"),// 字体
20,//WritableFont.DEFAULT_POINT_SIZE, // 字号
WritableFont.NO_BOLD, // 粗体
false, // 斜体
UnderlineStyle.NO_UNDERLINE, // 下划线
Colour.BLUE2, // 字体颜色
ScriptStyle.NORMAL_SCRIPT);
wcf = new WritableCellFormat(titleWf);
wcf.setBackground(Colour.GRAY_25);// 设置单元格的背景颜色
wcf.setAlignment(Alignment.CENTRE); // 设置对齐方式
wcf.setBorder(Border.ALL, BorderLineStyle.THICK); // 添加边框
cell.setCellFormat(wcf);
// 将B3的字体改为仿宋_GB2312
cell = sheet.getWritableCell(1,2);
WritableFont fs = new WritableFont(WritableFont.createFont("仿宋_GB2312"),
11);
wcf = new WritableCellFormat(fs);
cell.setCellFormat(wcf);
// 将B4的字号改为20
cell = sheet.getWritableCell(1,3);
WritableFont size20 = new WritableFont(WritableFont.createFont("宋体"),
20);
wcf = new WritableCellFormat(size20);
cell.setCellFormat(wcf);
// 将B5的字体改为加粗
cell = sheet.getWritableCell(1,4);
WritableFont bold = new WritableFont(WritableFont.createFont("宋体"),
11,
WritableFont.BOLD);
wcf = new WritableCellFormat(bold);
cell.setCellFormat(wcf);
// 将B6的字体改为倾斜
cell = sheet.getWritableCell(1,5);
WritableFont italic = new WritableFont(WritableFont.createFont("宋体"),
11,
WritableFont.NO_BOLD,
true);
wcf = new WritableCellFormat(italic);
cell.setCellFormat(wcf);
// 将B7字体加下划线
cell = sheet.getWritableCell(1,6);
WritableFont underline = new WritableFont(WritableFont.createFont("宋体"),
11,
WritableFont.NO_BOLD,
false,
UnderlineStyle.SINGLE);
wcf = new WritableCellFormat(underline);
cell.setCellFormat(wcf);
// 将B8的文字改为“待修改文字-已修改”
cell = sheet.getWritableCell(1,7);
if (cell.getType() == CellType.LABEL)
{
Label lc = (Label) cell;
lc.setString(lc.getString() + " - 已修改");
}
// 将B9文字对齐方式改为垂直居中、右对齐
cell = sheet.getWritableCell(1,8);
WritableFont align = new WritableFont(WritableFont.createFont("宋体"),
11);
wcf = new WritableCellFormat(align);
wcf.setAlignment(Alignment.RIGHT); // 设置为右对齐
wcf.setVerticalAlignment(VerticalAlignment.CENTRE); // 设置为垂直居中
cell.setCellFormat(wcf);
// 将E3文字改为自动换行
cell = sheet.getWritableCell(4,2);
WritableFont justify = new WritableFont(WritableFont.createFont("宋体"),
11);
wcf = new WritableCellFormat(justify);
wcf.setAlignment(Alignment.JUSTIFY);
cell.setCellFormat(wcf);
// 将B12的数字有效位数从5位改为7位
cell = sheet.getWritableCell(1,11);
NumberFormat sevendps = new NumberFormat("#.0000000");
wcf = new WritableCellFormat(sevendps);
cell.setCellFormat(wcf);
// 将B13改为4位科学计数法表示
cell = sheet.getWritableCell(1,12);
NumberFormat exp4 = new NumberFormat("0.####E0");
wcf = new WritableCellFormat(exp4);
cell.setCellFormat(wcf);
// 将B14改为默认数字表示
cell = sheet.getWritableCell(1,13);
cell.setCellFormat(WritableWorkbook.NORMAL_STYLE);
// 将B15数字类型的值17改为22
cell = sheet.getWritableCell(1,14);
if (cell.getType() == CellType.NUMBER)
{
Number n = (Number) cell;
n.setValue(42);
}
// 将B16的值2.71进行加法运算2.71 + 0.1
cell = sheet.getWritableCell(1,15);
if (cell.getType() == CellType.NUMBER)
{
Number n = (Number) cell;
n.setValue(n.getValue() + 0.1);
}
// 将B19日期格式改为默认
cell = sheet.getWritableCell(1,18);
wcf = new WritableCellFormat(DateFormats.FORMAT9);
cell.setCellFormat(wcf);
// 将B20日期格式改为dd MMM yyyy HH:mm:ss
cell = sheet.getWritableCell(1,19);
DateFormat df = new DateFormat("dd MMM yyyy HH:mm:ss");
wcf = new WritableCellFormat(df);
cell.setCellFormat(wcf);
// 将B21的日期设置为 2011-6-1 11:18:50
cell = sheet.getWritableCell(1,20);
if (cell.getType() == CellType.DATE)
{
DateTime dt = (DateTime) cell;
Calendar cal = Calendar.getInstance();
cal.set(2011, 5, 1, 11, 18, 50);
Date d = cal.getTime();
dt.setDate(d);
}
// 将B24文字添加链接http://www.baidu.com
WritableHyperlink link = new WritableHyperlink(1, 23, new URL("http://www.baidu.com"));
sheet.addHyperlink(link);
// 更改URL链接
WritableHyperlink hyperlinks[] = sheet.getWritableHyperlinks();
for (int i = 0; i < hyperlinks.length; i++) {
WritableHyperlink wh = hyperlinks[i];
if (wh.getColumn() == 1 && wh.getRow() == 24) {
// 将B25文字链接取消
sheet.removeHyperlink(wh,true);//true：保留文字；false：删除文字
}else if(wh.getColumn() == 1 && wh.getRow() == 25){
try {
// 将B26链接更改为http://wuhongyu.javaeye.com
wh.setURL(new URL("http://wuhongyu.javaeye.com"));
} catch (MalformedURLException e) {
e.printStackTrace();
}
}
}
// 利用公式取得B29、B30的值
Formula f1 = new Formula(1, 28, "SUM(C29:D29)");
sheet.addCell(f1);
Formula f2 = new Formula(1, 29, "AVERAGE(C30:G30)");
sheet.addCell(f2);
// 在B32处添加图片，图片大小占10行3列，只支持png格式
File file = new File("d:\\shu05.png");
WritableImage image = new WritableImage(1, 31, 3, 10, file);
sheet.addImage(image);
// 在A44出添加内容"Added drop down validation"，并为其添加注释
label = new Label(0, 43, "Added drop down validation");
wcfeatures = new WritableCellFeatures();
wcfeatures.setComment("右边列是个下拉列表");
label.setCellFeatures(wcfeatures);
sheet.addCell(label);
// 在B44处添加一个下拉列表并添加注释
Blank b = new Blank(1, 43);
wcfeatures = new WritableCellFeatures();
ArrayList al = new ArrayList();
al.add("why");
al.add("landor");
al.add("tjm");
wcfeatures.setDataValidationList(al);
wcfeatures.setComment("这是一个注释");
b.setCellFeatures(wcfeatures);
sheet.addCell(b);
// 为A46添加注释。
// 此处比较麻烦，试了多次发现必须将cell强制类型转换、添加CellFeatures再修改注释才可用，不知有没有更好的办法。
cell = sheet.getWritableCell(0,45);
wcfeatures = new WritableCellFeatures();
wcfeatures.setComment("这个注释不会被显示，删了这行还不行,MD");
cell.setCellFeatures(wcfeatures);
label = (Label) cell;
// label.setCellFeatures(wcfeatures);// 直接这样写会报一个警告（“注释已存在”），但那个注释仍会被显示。
label.addCellFeatures();
label.getWritableCellFeatures().setComment("终于加上注释了，哈哈哈哈");
// if (cell instanceof Number) {
// Number num = (Number) cell;
// num.setCellFeatures(wcfeatures);
// } else if (cell instanceof jxl.write.Boolean) {
// jxl.write.Boolean bool = (jxl.write.Boolean) cell;
// bool.setCellFeatures(wcfeatures);
// } else if (cell instanceof jxl.write.DateTime) {
// jxl.write.DateTime dt = (jxl.write.DateTime) cell;
// dt.setCellFeatures(wcfeatures);
// } else {
// Label _label = (Label) cell;
// _label.setCellFeatures(wcfeatures);
// }
workbook.write();
workbook.close();
wb.close();
}
}
Utilice varias hojas y conéctese a la base de datos MySQL/Oracle
Antecedentes:
1.xls tiene varias páginas de hoja. Cada página de hoja es como se muestra en la siguiente figura. La primera línea es el nombre de la tabla y la segunda columna es el valor del campo. Ahora debemos juzgar si el campo tiene un valor en la tabla. Si hay un valor, regístrelo como 1. Si no hay ningún valor o el campo no existe, se registrará como 0.
import com.sun.deploy.util.StringUtils;
import jxl.Cell;
import jxl.Sheet;
import jxl.Workbook;
import jxl.read.biff.BiffException;
import jxl.write.Label;
import jxl.write.WritableSheet;
import jxl.write.WritableWorkbook;
import jxl.write.WriteException;
import jxl.write.biff.RowsExceededException;
import javax.sql.DataSource;
import java.io.*;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.Statement;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
public class sql2excel {
public static void main(String[] args) throws Exception {
String fileResult = "C:\\Users\\cara\\Downloads\\2.xls";// 新创建的结果表
String file = "C:\\Users\\cara\\Downloads\\1.xls";
Workbook workbook = Workbook.getWorkbook(new File(file));
WritableWorkbook wwb = Workbook.createWorkbook(new File(fileResult));
Connection conn = null;
if (file != null) {
try {
int numberOfSheets = workbook.getNumberOfSheets();// sheet页的数量
for (int n = 0; n < numberOfSheets; n++) {
WritableSheet ws = wwb.createSheet("sheet"+n, numberOfSheets);
Sheet sheet = workbook.getSheet(n);
int rowLen = sheet.getRows();// 数据行
int colLen = sheet.getColumns();// 数据列
String[] values = new String[rowLen];
// 获取所有字段
for (int i = 0; i < rowLen; ++i) {
// 表中数据行的第几行
Cell cell = sheet.getCell(1,i);
String content = cell.getContents();
if (content != null || content.trim().length() > 0){
values[i] = content;
Label labelQuery = new Label(1,i,content);
ws.addCell(labelQuery);
}
}
// 所有字段写入
// 遍历第1行，从第3列开始，取所有表字段
for (int i = 2; i < colLen; i++) {
Cell cell = sheet.getCell(i,0);
String tableName = cell.getContents();
// 与数据库建立连接
try {
// Class. forName("com.mysql.jdbc.Driver");
// conn = DriverManager.getConnection("jdbc:mysql://ip:端口号/数据库名","用户名","密码");
Class.forName("oracle.jdbc.driver.OracleDriver");
conn = DriverManager.getConnection("jdbc:oracle:thin:@//ip:端口号/实例名","用户名","密码");
Statement stmt = null;
int[] result = new int[rowLen];
for (int j = 1; j < rowLen; j++) {
String sql = "select "+values[j]+" from "+tableName+" where "+values[j]+" is not null";
stmt = conn.createStatement();
ResultSet rs = null;
try {
rs = stmt.executeQuery(sql);
}catch (Exception e) {
continue;
}
while (rs.next()){
result[j] = 1;
break;
}
}
// 写入
System.out.println("---------------写入查询值-----------------------");
// 写入查询值：从第3列第1行开始写
Label tableNameLabel = new Label(i,0,tableName);
ws.addCell(tableNameLabel);
for (int j = 1; j < result.length; j++) {
Label labelQuery = new Label(i,j,result[j]+"");
ws.addCell(labelQuery);
}
} catch (Exception e) {
throw e;
}
}
}
} catch (Exception e) {
throw e;
}finally {
workbook.close();
wwb.write();
wwb.close();
conn.close();
}
} else {
//如果文件为空则抛出异常
throw new RuntimeException("文件为空！");
}
System.out.println("操作完成！");
}
}
Informar un error
Error de lectura y escritura de archivos de Excel: jxl.read.biff.BiffException: no se puede reconocer la secuencia OLE
Motivo: la versión del archivo es incompatible, jxl solo admite la versión excecl03
Solución
Guarde el archivo como, seleccione el libro de trabajo Excel 97-2004 o el libro de trabajo 97-2003.