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如何用Java把数据从数据库导入到Excel中

2013-06-08 00:21 561 查看

packagecom.madhouse.sys.util;

importjava.io.File;

importjava.io.IOException;

importjava.sql.DriverManager;

importjava.sql.ResultSet;

importjava.sql.ResultSetMetaData;

importjava.sql.SQLException;

importjxl.Workbook;

importjxl.write.Label;

importjxl.write.WritableSheet;

importjxl.write.WritableWorkbook;

importjxl.write.WriteException;

importjxl.write.biff.RowsExceededException;

importorg.apache.commons.logging.Log;

importorg.apache.commons.logging.LogFactory;

importcom.mysql.jdbc.Connection;

importcom.mysql.jdbc.Statement;

/**

*<li>把数据导入到Excel公用类</li>

*</br>Thisisabout<code>ExcelUtil</code>

*

*@authorhjy273

*@version1.0

*@dateSep6,20089:52:52PM

*/

publicclassExcelUtil{

privatestaticLoglog=LogFactory.getLog(ExcelUtil.class);

publicExcelUtil(){

}

publicbooleanDB2Excel(ResultSetrs){

booleanflag=false;

WritableWorkbookworkbook=null;

WritableSheetsheet=null;

Labellabel=null;

//创建Excel表

try{

workbook=Workbook.createWorkbook(newFile("e:/_report/output.csv"));

//workbook=Workbook.createWorkbook(os);

//创建Excel表中的sheet

sheet=workbook.createSheet("FirstSheet",0);

//向Excel中添加数据

ResultSetMetaDatarsmd=rs.getMetaData();

intcolumnCount=rsmd.getColumnCount();

StringcolName=null;

introw=0;

//添加标题

for(inti=0;i<columnCount;i++){

colName=rsmd.getColumnName(i+1);

label=newLabel(i,row,colName);

//log.debug("标题:"+i+"---"+row+"---"+colName);

sheet.addCell(label);

}

row++;

log.debug("写入标题成功");

while(rs.next()){

for(inti=0;i<columnCount;i++){

label=newLabel(i,row,rs.getString(i+1));

log.debug("行:"+i+"---"+row+"---"+rs.getString(i+1));

sheet.addCell(label);

}

row++;

}

log.debug("写入内容成功");

//关闭文件

workbook.write();

workbook.close();

log.info("数据成功写入Excel");

flag=true;

}catch(SQLExceptione){

log.debug(e.getMessage());

}catch(RowsExceededExceptione){

log.debug(e.getMessage());

}catch(WriteExceptione){

log.debug(e.getMessage());

}catch(IOExceptione){

log.debug(e.getMessage());

}finally{

try{

workbook.close();

}catch(Exceptione){

}

}

returnflag;

}

/**

*测试方法

*

*@paramargs

*/

publicstaticvoidmain(String[]args){

//writeyourcode

try{

Class.forName("org.gjt.mm.mysql.Driver").newInstance();

Connectionconn=(Connection)DriverManager

.getConnection(

"jdbc:mysql://localhost:3306/firewall?useUnicode=true&characterEncoding=utf8",

"root","root");

Statementst=(Statement)conn.createStatement();

ResultSetrs=st

.executeQuery("select*fromfirewall.tb_operator");

if(!newExcelUtil().DB2Excel(rs)){

log.info("数据写入失败");

}

rs.close();

st.close();

conn.close();

}catch(Exceptione){

e.printStackTrace();

}

}

}

代码片段：

001	java把数据从数据库导入到excel

004	package com.madhouse.sys.util;

006	import java.io.File;

007	import java.io.IOException;

009	import java.sql.DriverManager;

010	import java.sql.ResultSet;

011	import java.sql.ResultSetMetaData;

012	import java.sql.SQLException;

014	import jxl.Workbook;

015	import jxl.write.Label;

016	import jxl.write.WritableSheet;

017	import jxl.write.WritableWorkbook;

018	import jxl.write.WriteException;

019	import jxl.write.biff.RowsExceededException;

021	import org.apache.commons.logging.Log;

022	import org.apache.commons.logging.LogFactory;

024	import com.mysql.jdbc.Connection;

025	import com.mysql.jdbc.Statement;

/**

028	* <li>把数据导入到Excel公用类</li>

029	* </br>Thisisabout<code>ExcelUtil</code>

031	* @authorhjy273

032	* @version1.0

033	* @dateSep6,20089:52:52PM

*/

035	public class ExcelUtil {

037	private static Log log=LogFactory.getLog(ExcelUtil. class );

039	public ExcelUtil() {

043	public boolean DB2Excel(ResultSet rs){

044	boolean flag = false ;

045	WritableWorkbook workbook= null ;

046	WritableSheet sheet= null ;

047	Label label= null ;

049	// 创建Excel表

try

051	workbook =Workbook.createWorkbook( new File( "e:/_report/output.csv" ));

052	//workbook =Workbook.createWorkbook(os);

054	// 创建Excel表中的sheet

055	sheet =workbook.createSheet( "First Sheet" , 0 );

057	// 向Excel中添加数据

058	ResultSetMetaData rsmd=rs.getMetaData();

059	int columnCount =rsmd.getColumnCount();

060	String colName= null ;

061	int row = 0 ;

//
添加标题

063	for ( int i = 0 ; i<columnCount;i++){

064	colName =rsmd.getColumnName(i+ 1 );

065	label = new Label(i, row,colName);

066	// log.debug("标题:"+i+"---"+row+"---"+colName);

067	sheet.addCell(label);

row++;

070	log.debug( "写入标题成功" );

071	while (rs.next()) {

072	for ( int i = 0 ; i<columnCount;i++){

073	label = new Label(i, row,rs.getString(i+ 1 ));

074	log.debug( "行:" +i+ "---" +row + "---" + rs.getString(i+ 1 ));

075	sheet.addCell(label);

row++;

079	log.debug( "写入内容成功" );

//
关闭文件

082	workbook.write();

083	workbook.close();

084	log.info( "数据成功写入Excel" );

085	flag = true ;

086	} catch (SQLException e){

087	log.debug(e.getMessage());

088	} catch (RowsExceededException e){

089	log.debug(e.getMessage());

090	} catch (WriteException e){

091	log.debug(e.getMessage());

092	} catch (IOException e){

093	log.debug(e.getMessage());

094	} finally {

try

096	workbook.close();

097	} catch (Exception e){

100	return flag;

/**

*
测试方法

106	* @paramargs

*/

108	public static void main(String[] args){

109	// writeyourcode

try

112	Class.forName( "org.gjt.mm.mysql.Driver" ).newInstance();

113	Connection conn=(Connection)DriverManager

114	.getConnection(

115	"jdbc:mysql://localhost:3306/firewall?useUnicode=true&characterEncoding=utf8" ,

116	"root" , "root" );

117	Statement st=(Statement)conn.createStatement();

118	ResultSet rs=st

119	.executeQuery( "select *fromfirewall.tb_operator" );

120	if (! new ExcelUtil().DB2Excel(rs)){

121	log.info( "数据写入失败" );

123	rs.close();

124	st.close();

125	conn.close();

127	} catch (Exception e){

128	e.printStackTrace();

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