package demo; import java.io.File; import java.io.IOException; import java.sql.Connection; import java.sql.DriverManager; import java.sql.ResultSet; import java.sql.ResultSetMetaData; import java.sql.SQLException; import java.sql.Statement; import java.util.Date; 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; /** * 将数据库里面的内容导入到excel中,可以分页 * 用到jxl.jar ojdbc.jar * @author gr * */ public class ExcelImportDemo { static ResultSet rs = null; static ResultSetMetaData rsData = null; static int sheetIndex = 0; // 计数器,起始为0 static int perPageSize = 60000;// excel2003每张表最大为65536行 static String fileName = "text.xls";// 新建的表格名称 static String URL = "jdbc:oracle:thin:@172.16.200.34:1521:orcl";// 数据库IP地址 static String DriverName = "oracle.jdbc.driver.OracleDriver"; static String username = "riskcontrol";// 用户 static String password = "riskcontrol";// 密码 public static void main(String[] args) throws Exception { connectOracle(); } static void connectOracle() throws SQLException, ClassNotFoundException { Connection conn = null; Class.forName(DriverName); long begintime = System.currentTimeMillis(); try { System.out.println("数据库连接开始:" + new Date(System.currentTimeMillis())); conn = DriverManager.getConnection(URL, username, password); Statement state = conn.createStatement( ResultSet.TYPE_SCROLL_INSENSITIVE, ResultSet.CONCUR_UPDATABLE); String sql = "select * from TAW_RISK_ASSIST_FUNCTIONPARAM"; rs = state.executeQuery(sql); rsData = rs.getMetaData();// 获得所需要的rs信息 rs.last(); int size = rs.getRow();// 列数 rs.beforeFirst(); int sheetsize = size / perPageSize + 1;// sheetsize是sheet的总页数 writeexcel(rs);// 新建一个excel,并且写入第一张表,每次只能写一张表 for (int i = 1; i < sheetsize; i++) { System.out.println(2); updateexcel(rs);// 写入后面的后面的表 } } catch (Exception e) { System.out.println("数据库连接错误"); e.printStackTrace(); } finally { conn.close(); System.out.println("数据库连接关闭!用时:" + (System.currentTimeMillis() - begintime) + "ms"); } } static void writeexcel(ResultSet rs) throws IOException, Exception, WriteException { WritableWorkbook book = Workbook.createWorkbook(new File(fileName)); WritableSheet sheet = book.createSheet("第" + (sheetIndex + 1) + "页", sheetIndex); int i = 1;// 每一页设为第一行 while (rs.next()) { for (int j = 1; j < rsData.getColumnCount(); j++) { Label label = new Label(j - 1, i, rs.getString(j) == null ? "" : rs.getString(j).toString()); if (i == 1) {// 标题只加载第一次 Label titleLabel = new Label(j - 1, 0, rsData .getColumnName(j)); sheet.addCell(titleLabel); } sheet.addCell(label); } i++; if (i > perPageSize) { break; } } sheetIndex++; book.write(); book.close(); } static void updateexcel(ResultSet rs) throws BiffException, IOException, RowsExceededException, WriteException, SQLException { Workbook wb = Workbook.getWorkbook(new File(fileName)); WritableWorkbook book = Workbook.createWorkbook(new File(fileName), wb); WritableSheet sheet = book.createSheet("第" + (sheetIndex + 1) + "页 ", sheetIndex); int i = 1;// 每一页设为第一行 while (rs.next()) { for (int j = 1; j < rsData.getColumnCount(); j++) { Label label = new Label(j - 1, i, rs.getString(j) == null ? "" : rs.getString(j).toString()); if (i == 1) {// 标题只加载第一次 Label titleLabel = new Label(j - 1, 0, rsData .getColumnName(j)); sheet.addCell(titleLabel); } sheet.addCell(label); } i++; if (i > perPageSize) { break; } } sheetIndex++; book.write(); book.close(); } }