Excel导入导出


<dependency>

<groupId>jexcelapi</groupId>

<artifactId>jxl</artifactId>

<version>2.6</version>

</dependency>

package com.haiersoft.buztest.util;

import java.io.*;

import jxl.*;

import jxl.write.*;

import jxl.format.*;

import java.text.SimpleDateFormat;

import java.util.*;

import jxl.write.Number;

import jxl.write.Boolean;

public class ExcelTest {

public static List list=new ArrayList();

//输出流，X轴Y轴； 自定义关联表导出

// public static void writeExcel(OutputStream os,int x,int y,List content) throws Exception {

// RegUser user=new RegUser();

// String str="";

// jxl.write.WritableWorkbook wwb = Workbook.createWorkbook(os);

// jxl.write.WritableSheet ws = wwb.createSheet("Sheet", 0);

//

//// jxl.write.Label labelC = new jxl.write.Label(x, y,content);

//// labelC = new jxl.write.Label(4, 4,content);

////

// if (ws != null) {

//

// // 下面开始添加单元格

// for (int i = 0; i < x; i++) {

//

//

// for (int j = 0; j < y; j++) {

// // 这里需要注意的是，在Excel中，第一个参数表示列，第二个表示行

// user=(RegUser)content.get(i);

//

// if(j==0){

// str=user.getUserName();

// }else if(j==1){

// str=user.getPassword();

// }else if(j==2){

// str=user.getUserContent();

// }else if(j==3){

// str=user.getFlag();

// }else if(j==4){

// str=user.getUserTime();

// }else if(j==5){

// str=String.valueOf(user.getId());

// }

//

//

// jxl.write.Label labelC = new Label(j, i,str);

// try {

// // 将生成的单元格添加到工作表中

// ws.addCell(labelC);

// } catch (RowsExceededException e) {

// e.printStackTrace();

// } catch (WriteException e) {

// e.printStackTrace();

// }

//

// }

// }

//

// }

//

//

//

// /*

// * 自定义单元格内样式；

// */

// // jxl.write.WritableFont wfc = new

// // jxl.write.WritableFont(WritableFont.ARIAL, 10, WritableFont.BOLD,

// // false,UnderlineStyle.NO_UNDERLINE);

// // jxl.write.WritableCellFormat wcfFC = new

// // jxl.write.WritableCellFormat(wfc);

// //单元格加红

// //wcfFC.setBackground(jxl.format.Colour.RED);

// //labelC = new jxl.write.Label(6, 0, "中国爱我 ", wcfFC);

//

//

//

// //ws.addCell(labelC);

// // 写入Exel工作表

// wwb.write();

// // 关闭Excel工作薄对象

// wwb.close();

//

// }

//new file ()

/**

* 读取Excel

*

* @param filePath

*/

public static void readExcel(String filePath)

{

String data2="";

//DateTime tem=new DateTime("");

SimpleDateFormat sdf=new SimpleDateFormat("yyyy-MM-dd");

try

{

InputStream is = new FileInputStream(filePath);

Workbook rwb = Workbook.getWorkbook(is);

//Sheet st = rwb.getSheet("0")这里有两种方法获取sheet表,1为名字，而为下标，从0开始

Sheet st = rwb.getSheet("Sheet1");

int rs=st.getColumns();

int rows=st.getRows();

System.out.println("列数===>"+rs+"行数："+rows);

for(int k=0;k<rows;k++){//行

for(int i=0 ;i<rs;i++){//列

Cell c00 = st.getCell(i,k);

//通用的获取cell值的方式,返回字符串

String strc00 = c00.getContents();

//获得cell具体类型值的方式

if(c00.getType() == CellType.LABEL)

{

LabelCell labelc00 = (LabelCell)c00;

strc00 = labelc00.getString();

}

//excel 类型为时间类型处理;

if(c00.getType()==CellType.DATE){

DateCell dc=(DateCell)c00;

strc00 = sdf.format(dc.getDate());

}

//excel 类型为数值类型处理;

/*

if(c00.getType()==CellType.NUMBER|| c00.getType()==CellType.NUMBER_FORMULA){

NumberCell nc=(NumberCell)c00;

strc00=""+nc.getValue();

}*/

//输出

System.out.println(">"+strc00);

list.add(strc00);

//列，行

// data2=String.valueOf(st.getCell(1,k).getContents());

// data2=data2.replace("/", "-");

// java.util.Date dt=sdf.parse(data2);

// System.out.println(sdf.format(dt));

//

}

System.out.println(data2+"======"+list.get(k)+"=========");

}

//关闭

rwb.close();

}

catch(Exception e)

{

e.printStackTrace();

}

}

/**

* 输出Excel

*

* @param os

*/

public static void writeExcel(OutputStream os)

{

try

{

/**

* 只能通过API提供的工厂方法来创建Workbook，而不能使用WritableWorkbook的构造函数，

* 因为类WritableWorkbook的构造函数为protected类型

* method(1)直接从目标文件中读取WritableWorkbook wwb = Workbook.createWorkbook(new File(targetfile));

* method(2)如下实例所示 将WritableWorkbook直接写入到输出流

*/

WritableWorkbook wwb = Workbook.createWorkbook(os);

//创建Excel工作表 指定名称和位置

WritableSheet ws = wwb.createSheet("Test Sheet 1",0);

//**************往工作表中添加数据*****************

//1.添加Label对象

Label label = new Label(0,0,"this is a label test");

ws.addCell(label);

//添加带有字型Formatting对象

WritableFont wf = new WritableFont(WritableFont.TIMES,18,WritableFont.BOLD,true);

WritableCellFormat wcf = new WritableCellFormat(wf);

Label labelcf = new Label(1,0,"this is a label test",wcf);

ws.addCell(labelcf);

//添加带有字体颜色的Formatting对象

WritableFont wfc = new WritableFont(WritableFont.ARIAL,10,WritableFont.NO_BOLD,false,

UnderlineStyle.NO_UNDERLINE,jxl.format.Colour.RED);

WritableCellFormat wcfFC = new WritableCellFormat(wfc);

Label labelCF = new Label(1,0,"This is a Label Cell",wcfFC);

ws.addCell(labelCF);

//2.添加Number对象

Number labelN = new Number(0,1,3.1415926);

ws.addCell(labelN);

//添加带有formatting的Number对象

NumberFormat nf = new NumberFormat("#.##");

WritableCellFormat wcfN = new WritableCellFormat(nf);

Number labelNF = new jxl.write.Number(1,1,3.1415926,wcfN);

ws.addCell(labelNF);

//3.添加Boolean对象

Boolean labelB = new jxl.write.Boolean(0,2,false);

ws.addCell(labelB);

//4.添加DateTime对象

jxl.write.DateTime labelDT = new jxl.write.DateTime(0,3,new java.util.Date());

ws.addCell(labelDT);

//添加带有formatting的DateFormat对象

DateFormat df = new DateFormat("dd MM yyyy hh:mm:ss");

WritableCellFormat wcfDF = new WritableCellFormat(df);

DateTime labelDTF = new DateTime(1,3,new java.util.Date(),wcfDF);

ws.addCell(labelDTF);

// //添加图片对象,jxl只支持png格式图片

// File image = new File("d://2.png");

// WritableImage wimage = new WritableImage(0,1,2,2,image);

// ws.addImage(wimage);

//写入工作表

wwb.write();

wwb.close();

}

catch(Exception e)

{

e.printStackTrace();

}

}

/**

* 拷贝后,进行修改,其中file1为被copy对象，file2为修改后创建的对象

* 尽单元格原有的格式化修饰是不能去掉的，我们还是可以将新的单元格修饰加上去，

* 以使单元格的内容以不同的形式表现

* @param file1

* @param file2

*/

public static void modifyExcel(File file1,File file2)

{

try

{

Workbook rwb = Workbook.getWorkbook(file1);

WritableWorkbook wwb = Workbook.createWorkbook(file2,rwb);//copy

WritableSheet ws = wwb.getSheet(0);

WritableCell wc = ws.getWritableCell(0,0);

//判断单元格的类型,做出相应的转换

if(wc.getType() == CellType.LABEL)

{

Label label = (Label)wc;

label.setString("The value has been modified");

}

wwb.write();

wwb.close();

rwb.close();

}

catch(Exception e)

{

e.printStackTrace();

}

}

//测试

public static void main(String[] args)

{

try

{

//读Excel

//ExcelTest.readExcel("C:/Users/Administrator/Desktop/student_info.xls");

//输出Excel

File fileWrite = new File("C:/Users/Administrator/Desktop/score.xls");

fileWrite.createNewFile();

OutputStream os = new FileOutputStream(fileWrite);

ExcelTest.writeExcel(os);

//修改Excel

// excelTest.modifyExcel(new File(""),new File(""));

}

catch(Exception e)

{

e.printStackTrace();

}

}

}