package com.file;
import java.io.File;
import java.io.IOException;
import java.util.Scanner;
import jxl.Cell;
import jxl.Sheet;
import jxl.Workbook;
import jxl.format.UnderlineStyle;
import jxl.write.DateFormat;
import jxl.write.DateTime;
import jxl.write.Label;
import jxl.write.NumberFormat;
import jxl.write.WritableCellFormat;
import jxl.write.WritableFont;
import jxl.write.WritableSheet;
import jxl.write.WritableWorkbook;
//操作Excel文件的类
public class OperatorExcel {
public static String readExcel(File file) {// 读取Excel文件的内容
StringBuffer sb = new StringBuffer();
Workbook wb = null;
try {
wb = Workbook.getWorkbook(file);// 构造Workbook(工作薄)对象
} catch (Exception e) {// 捕获异常
e.printStackTrace();
}
if (wb == null)// 判断(工作薄)对象是否为空
return null;
Sheet[] sheet = wb.getSheets();// 创建Sheet(工作表)对象
if (sheet != null && sheet.length > 0) {// 工作表对象不为空
for (int i = 0; i < sheet.length; i++) {// 对每个工作表进行循环
int rowNum = sheet[i].getRows();// 得到当前工作表的行数
for (int j = 0; j < rowNum; j++) {
Cell[] cells = sheet[i].getRow(j);// 得到当前行的所有单元格
if (cells != null && cells.length > 0) {
for (int k = 0; k < cells.length; k++) {// 对每个单元格进行循环
String cellValue = cells[k].getContents();// 读取当前单元格的值
sb.append(cellValue + "\t");
}
}
sb.append("\r\n");
}
sb.append("\r\n");
}
}
wb.close();// 最后关闭资源,释放内存
return sb.toString();
}
public static void writeContentToExcel(String fileName) throws Exception {// 将内容写入
File tempFile = new File(fileName);
WritableWorkbook workbook = Workbook.createWorkbook(tempFile);
WritableSheet sheet = workbook.createSheet("TestCreateExcel", 0);
// 一些临时变量,用于写到excel中
Label l = null;
jxl.write.Number n = null;
jxl.write.DateTime d = null;
// 预定义的一些字体和格式,同一个Excel中最好不要有太多格式
WritableFont headerFont = new WritableFont(WritableFont.ARIAL, 12,
WritableFont.BOLD, false, UnderlineStyle.NO_UNDERLINE,
jxl.format.Colour.BLUE);
WritableCellFormat headerFormat = new WritableCellFormat(headerFont);
WritableFont titleFont = new WritableFont(WritableFont.ARIAL, 10,
WritableFont.NO_BOLD, false, UnderlineStyle.NO_UNDERLINE,
jxl.format.Colour.RED);
WritableCellFormat titleFormat = new WritableCellFormat(titleFont);
WritableFont detFont = new WritableFont(WritableFont.ARIAL, 10,
WritableFont.NO_BOLD, false, UnderlineStyle.NO_UNDERLINE,
jxl.format.Colour.BLACK);
WritableCellFormat detFormat = new WritableCellFormat(detFont);
NumberFormat nf = new NumberFormat("0.00000"); // 用于Number的格式
WritableCellFormat priceFormat = new WritableCellFormat(detFont, nf);
DateFormat df = new DateFormat("yyyy-MM-dd");// 用于日期的
WritableCellFormat dateFormat = new WritableCellFormat(detFont, df);
l = new Label(0, 0, "用于测试的Excel文件", headerFormat);// 创建一些单元格,再加到sheet中
sheet.addCell(l);
// 添加标题
int column = 0;
l = new Label(column++, 2, "标题", titleFormat);
sheet.addCell(l);
l = new Label(column++, 2, "日期", titleFormat);
sheet.addCell(l);
l = new Label(column++, 2, "货币", titleFormat);
sheet.addCell(l);
l = new Label(column++, 2, "价格", titleFormat);
sheet.addCell(l);
// 添加内容
int i = 0;
column = 0;
l = new Label(column++, i + 3, "标题 " + i, detFormat);
sheet.addCell(l);
d = new DateTime(column++, i + 3, new java.util.Date(), dateFormat);
sheet.addCell(d);
l = new Label(column++, i + 3, "CNY", detFormat);
sheet.addCell(l);
n = new jxl.write.Number(column++, i + 3, 5.678, priceFormat);
sheet.addCell(n);
i++;
column = 0;
l = new Label(column++, i + 3, "标题 " + i, detFormat);
sheet.addCell(l);
d = new DateTime(column++, i + 3, new java.util.Date(), dateFormat);
sheet.addCell(d);
l = new Label(column++, i + 3, "SGD", detFormat);
sheet.addCell(l);
n = new jxl.write.Number(column++, i + 3, 98832, priceFormat);
sheet.addCell(n);
// 设置列的宽度
column = 0;
sheet.setColumnView(column++, 20);
sheet.setColumnView(column++, 20);
sheet.setColumnView(column++, 10);
sheet.setColumnView(column++, 20);
workbook.write();
workbook.close();
System.out.println("内容写入" + fileName + "成功");
}
public static void writeExcel(String fileName) {// 生成一个Excel文件
WritableWorkbook wwb = null;
try {
// 创建一个可写入的工作薄(Workbook)对象
wwb = Workbook.createWorkbook(new File(fileName));
} catch (IOException e) {// 捕获流异常
e.printStackTrace();
}
if (wwb != null) {
// 创建一个可写入的工作表
// Workbook的createSheet方法有两个参数,第一个是工作表的名称,第二个是工作表在工作薄中的位置
WritableSheet ws = wwb.createSheet("sheet1", 0);
for (int i = 0; i < 10; i++) {// 循环添加单元格
for (int j = 0; j < 5; j++) {
Label labelC = new Label(j, i, "这是第" + (i + 1) + "行,第"
+ (j + 1) + "列");
try {
ws.addCell(labelC);// 将生成的单元格添加到工作表中
} catch (Exception e) {// 捕获异常
e.printStackTrace();
}
}
}
try {
wwb.write();// 从内存中写入文件中
wwb.close();// 从内存中写入文件中
} catch (Exception e) {// 捕获异常
e.printStackTrace();
}
}
System.out.println("生成一个Excel文件:" + fileName + "成功!");
}
public static boolean searchKeyWord(File file, String keyWord) {// 搜索某一个文件中是否包含某个关键字
boolean res = false;
Workbook wb = null;
try {
wb = Workbook.getWorkbook(file);// 构造Workbook(工作薄)对象
} catch (Exception e) {// 捕获异常
return res;
}
if (wb == null)
return res;
Sheet[] sheet = wb.getSheets();// 创建Sheet(工作表)对象
boolean breakSheet = false;
if (sheet != null && sheet.length > 0) {
for (int i = 0; i < sheet.length; i++) {// 对每个工作表进行循环
if (breakSheet)
break;
int rowNum = sheet[i].getRows();// 得到当前工作表的行数
boolean breakRow = false;
for (int j = 0; j < rowNum; j++) {// 循环获得行信息
if (breakRow)
break;
Cell[] cells = sheet[i].getRow(j);// 得到当前行的所有单元格
if (cells != null && cells.length > 0) {
boolean breakCell = false;
for (int k = 0; k < cells.length; k++) {// 对每个单元格进行循环
if (breakCell)
break;
String cellValue = cells[k].getContents();// 读取当前单元格的值
if (cellValue == null)
continue;
if (cellValue.contains(keyWord)) {// 判断是否包含关键字
res = true;
breakCell = true;
breakRow = true;
breakSheet = true;
}
}
}
}
}
}
wb.close();// 关闭资源,释放内存
return res;
}
public static void updateExcel(String fileName) {// 修改Excel文件
try {
Workbook wb = Workbook.getWorkbook(new File(fileName));// 构造Workbook(工作薄)对象
// 打开一个文件的副本,并且指定数据写回到原文件
WritableWorkbook book = Workbook.createWorkbook(new File(fileName),
wb);
WritableSheet sheet = book.createSheet(" 第二页 ", 1);// 添加一个工作表
sheet.addCell(new Label(0, 0, " 第二页的测试数据 "));// 添加一个单元格
book.write();// 副本对象关闭
book.close();// 工作薄对象关闭
} catch (Exception e) {// 捕获异常
System.out.println(e);
}
System.out.println("修改Excel文件" + fileName + "成功");
}
public static void readExcelInfo(String fileName) throws Exception {// 获得Excel文件多少行多少列
Workbook book = Workbook.getWorkbook(new File(fileName));// 构造Workbook(工作薄)对象
Sheet sheet = book.getSheet(0);
// 得到第一列第一行的单元格// 获得第一个工作表对象
int columnum = sheet.getColumns(); // 得到列数
int rownum = sheet.getRows(); // 得到行数
System.out.println(columnum);
System.out.println(rownum);
for (int i = 0; i < rownum; i++) // 循环进行读写
{
for (int j = 0; j < columnum; j++) {
Cell cell1 = sheet.getCell(j, i);
String result = cell1.getContents();
System.out.print(result);
System.out.print(" \t ");
}
System.out.println();
}
book.close();// 关闭(工作薄)对象
}
public static void main(String[] args) {// java程序主入口处
try {
System.out.println("1.创建Excel文件,输入Excel文件名称(包括路径和后缀)");
Scanner scan = new Scanner(System.in);
final String fileName = scan.next();// 获得键盘值
writeExcel(fileName);// 调用生成Excel方法
System.out.println("2.将内容写入Excel文件");
writeContentToExcel(fileName);// 调用将内容写入Excel方法
System.out.println("3.读取Excel文件");
System.out.println(readExcel(new File(fileName)));// 读取Excel方法
System.out.println("3.搜索关键字--'标题'");
System.out.println("找到关键字?" + searchKeyWord(new File(fileName), "标题"));// 调用搜索关键字方法
System.out.println("4.修改Excel文件");
updateExcel(fileName);// 调用修改Excel文件
System.out.println("5.读取Excel文件的行和列");
readExcelInfo(fileName);
} catch (Exception e) {// 捕获异常
e.printStackTrace();
}
}
}