最近在做我們的JAVA課程設計，我的設計里面涉及到了對信息的導出，包括導出Excel和Pdf．在網上查了有關Poi的資料查了很久終于寫出了滿足自己需求的程序．以下是程序的全部代碼：
（一）SheetDataSource．java
package com.javaeye.yongsky;
import java.sql.*;
import java.util.*;
import com.microsoft.jdbc.*;
public class SheetDataSource 
{
private static Connection con ;
private static final String DatabaseName = "POIDEMO";
private static final String userName = "sa";
private static final String password = "123";
public SheetDataSource()
{
try {
Class.forName("com.microsoft.jdbc.sqlserver.SQLServerDriver");
try {
con = DriverManager.getConnection("jdbc:microsoft:sqlserver://127.0.0.1:1433;DatabaseName="+DatabaseName,userName,password);
} catch (SQLException e) {
e.printStackTrace();
}
} catch (ClassNotFoundException e) {
e.printStackTrace();
}
}
public static ResultSet selectAllDataFromDB() throws SQLException
{
new SheetDataSource();
Statement stmt = con.createStatement();
return stmt.executeQuery("select * from COMPANY");
}
}
上面部分代碼主要是從數據庫里面取出數據，作為Excel的數據源．
（二）PoiDemo．java
package com.javaeye.yongsky;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.*;
import javax.swing.JOptionPane;
import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFFooter;
import org.apache.poi.hssf.usermodel.HSSFHeader;
import org.apache.poi.hssf.usermodel.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
public class PoiDemo {
//表頭
public static final String[] tableHeader = {"企業中文名","所屬國家","企業英文名","2003年排名","2004年排名","2005年排名",
"2006年排名","2007年排名","主要業務","2003年營業額","2004年營業額","2005年營業額","2006年營業額","2007年營業額","企業編號","名次升降",
"圖片","狀況"};
//創建工作本
public static HSSFWorkbook demoWorkBook = new HSSFWorkbook();
//創建表
public static HSSFSheet demoSheet = demoWorkBook.createSheet("The World's 500 Enterprises");
//表頭的單元格個數目
public static final short cellNumber = (short)tableHeader.length;
//數據庫表的列數
public static final int columNumber = 18;
/** *//**
* 創建表頭
* @return
*/
public static void createTableHeader()
{
HSSFHeader header = demoSheet.getHeader();
header.setCenter("世界五百強企業名次表");
HSSFRow headerRow = demoSheet.createRow((short) 0);
for(int i = 0;i < cellNumber;i++)
{
HSSFCell headerCell = headerRow.createCell((short) i);
headerCell.setEncoding(HSSFCell.ENCODING_UTF_16);
headerCell.setCellValue(tableHeader[i]);
}
}
/** *//**
* 創建行
* @param cells
* @param rowIndex
*/
public static void createTableRow(List<String> cells,short rowIndex)
{
//創建第rowIndex行
HSSFRow row = demoSheet.createRow((short) rowIndex);
for(short i = 0;i < cells.size();i++)
{
//創建第i個單元格
HSSFCell cell = row.createCell((short) i);
cell.setEncoding(HSSFCell.ENCODING_UTF_16);
cell.setCellValue(cells.get(i));
}
}
/** *//**
* 創建整個Excel表
* @throws SQLException
*
*/
public static void createExcelSheeet() throws SQLException
{
createTableHeader();
ResultSet rs = SheetDataSource.selectAllDataFromDB();
int rowIndex = 1;
while(rs.next())
{
List<String> list = new ArrayList<String>();
for(int i = 1;i <= columNumber;i++)
{
list.add(rs.getString(i));
}
createTableRow(list,(short)rowIndex);
rowIndex++;
}
}
/** *//**
* 導出表格
* @param sheet
* @param os
* @throws IOException
*/
public void exportExcel(HSSFSheet sheet,OutputStream os) throws IOException
{
sheet.setGridsPrinted(true);
HSSFFooter footer = sheet.getFooter();
footer.setRight("Page " + HSSFFooter.page() + " of " +
HSSFFooter.numPages());
demoWorkBook.write(os);
}
public static void main(String[] args) {
String fileName = "D:\\世界五百強企業名次表.xls";
FileOutputStream fos = null;
try {
PoiDemo pd = new PoiDemo();
pd.createExcelSheeet();
fos = new FileOutputStream(fileName);
pd.exportExcel(demoSheet,fos);
JOptionPane.showMessageDialog(null, "表格已成功導出到 : "+fileName);
} catch (Exception e) {
JOptionPane.showMessageDialog(null, "表格導出出錯，錯誤信息 ："+e+"\n錯誤原因可能是表格已經打開。");
e.printStackTrace();
} finally {
try {
fos.close();
} catch (Exception e) {
e.printStackTrace();
}
}
}
}
另外在附件里面附帶有本程序所用的所有資源，包括源代碼文件，數據庫和POI的JAR包，歡迎有興趣的朋友參考，并提出寶貴的意見．
致謝 ：
本程序的數據庫由兄弟溫總提供，為了不讓他免費為我們提供他辛辛苦苦做出數據庫而感到心里不平衡，在此向他表示感謝！ 