在Java编程中怎么将从数据库查询出来的数据导成Excel文...-数据库文件生成excel,数据库中数据导入在exce

用一个list集合接收从数据库里返回的数据，把一条数据当成一个Map,然后遍历list,最后把这个Map中对应Excel的列的值，写到Excel里

下面是我写的一个运用jxl生成Excel文件的方法
该方法接收一个保存MarkesData数据的ArrayList arlist和文件生成路径Path
通过取得arlist里的数据生成Excel文件
感觉应该是你想要的 我没调试过也许有错 你也可以根据你的需要进行修改^_^

import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Iterator;

import jxl.Workbook;
import jxl.write.Label;
import jxl.write.WritableSheet;
import jxl.write.WritableWorkbook;
import jxl.write.WriteException;
import jxl.write.biff.RowsExceededException;

public class WriteExcel {

WritableWorkbook book=null;

public void OutputExcel(ArrayList arlist,String Path){
try{
book = Workbook.createWorkbook(new File(Path));
//设置表名
WritableSheet sheet = book.createSheet("考试单",0);
//生成表格题头
Label labe1 = new Label(0, 0, "考生姓名" );
Label labe2 = new Label(1, 0, "地区");
Label labe3 = new Label(2, 0, "所属院校");
Label labe4 = new Label(3, 0, "班级");
Label labe5 = new Label(4, 0, "考试号");
Label labe6 = new Label(5, 0, "考试时间");
Label labe7 = new Label(6, 0, "科目名称");

//将生成的单元格添加到工作e69da5e887aae799bee5baa6339表中
sheet.addCell(labe1);
sheet.addCell(labe2);
sheet.addCell(labe3);
sheet.addCell(labe4);
sheet.addCell(labe5);
sheet.addCell(labe6);
sheet.addCell(labe7);

Iterator it = arlist.iterator();
int i = 1;

while(it.hasNext()){
//通过迭代获得arlist里的MarkesData对象
MarkesData temp = (MarkesData)it.next();

//取得数据生成单元格
Label label1=new Label(0,i,temp.getUser_name());
Label label2=new Label(1,i,temp.getArea_name());
Label label3=new Label(2,i,temp.getCollege_name());
Label label4=new Label(3,i,temp.getClass_name());
Label label5=new Label(4,i,temp.getTest_name());
Label label6=new Label(5,i,temp.getStarttime());
Label label7=new Label(6,i,temp.getSubject_name());

//将生成的单元格添加到工作表中
sheet.addCell(label1);
sheet.addCell(label2);
sheet.addCell(label3);
sheet.addCell(label4);
sheet.addCell(label5);
sheet.addCell(label6);
sheet.addCell(label7);

i++;
}
book.write();
book.close();
} catch (RowsExceededException e) {
e.printStackTrace();
} catch (WriteException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} finally{
try{
if(book!=null)book.close();
}catch(Exception e){
System.out.println("exception when closing Connection in finally");
System.out.println(e.getMessage().toString());
}
}
}
}

import jxl.*;
import jxl.write.*;
import java.io.*;
import java.io.File.*;
import java.util.*;

public class excel
{
public static void main(String[] args)
{

String targetfile = "c:/out.xls";//输出的excel文件e799bee5baa6e997aee7ad94e59b9ee7ad94363名
String worksheet = "List";//输出的excel文件工作表名
String[] title = {"ID","NAME","DESCRIB"};//excel工作表的标题

WritableWorkbook workbook;
try
{
//创建可写入的Excel工作薄,运行生成的文件在tomcat/bin下
//workbook = Workbook.createWorkbook(new File("output.xls"));
System.out.println("begin");

OutputStream os=new FileOutputStream(targetfile);
workbook=Workbook.createWorkbook(os);

WritableSheet sheet = workbook.createSheet(worksheet, 0); //添加第一个工作表
//WritableSheet sheet1 = workbook.createSheet("MySheet1", 1); //可添加第二个工作
/*
jxl.write.Label label = new jxl.write.Label(0, 2, "A label record"); //put a label in cell A3, Label(column,row)
sheet.addCell(label);
*/

jxl.write.Label label;
for (int i=0; i<title.length; i++)
{
//Label(列号,行号 ,内容 )
label = new jxl.write.Label(i, 0, title[i]); //put the title in row1
sheet.addCell(label);
}

//下列添加的对字体等的设置均调试通过，可作参考用

//添加数字
jxl.write.Number number = new jxl.write.Number(3, 4, 3.14159); //put the number 3.14159 in cell D5
sheet.addCell(number);

//添加带有字型Formatting的对象
jxl.write.WritableFont wf = new jxl.write.WritableFont(WritableFont.TIMES,10,WritableFont.BOLD,true);
jxl.write.WritableCellFormat wcfF = new jxl.write.WritableCellFormat(wf);
jxl.write.Label labelCF = new jxl.write.Label(4,4,"文本",wcfF);
sheet.addCell(labelCF);

//添加带有字体颜色,带背景颜色 Formatting的对象
jxl.write.WritableFont wfc = new jxl.write.WritableFont(WritableFont.ARIAL,10,WritableFont.BOLD,false,jxl.format.UnderlineStyle.NO_UNDERLINE,jxl.format.Colour.RED);
jxl.write.WritableCellFormat wcfFC = new jxl.write.WritableCellFormat(wfc);
wcfFC.setBackground(jxl.format.Colour.BLUE);
jxl.write.Label labelCFC = new jxl.write.Label(1,5,"带颜色",wcfFC);
sheet.addCell(labelCFC);

//添加带有formatting的Number对象
jxl.write.NumberFormat nf = new jxl.write.NumberFormat("#.##");
jxl.write.WritableCellFormat wcfN = new jxl.write.WritableCellFormat(nf);
jxl.write.Number labelNF = new jxl.write.Number(1,1,3.1415926,wcfN);
sheet.addCell(labelNF);

//3.添加Boolean对象
jxl.write.Boolean labelB = new jxl.write.Boolean(0,2,false);
sheet.addCell(labelB);

//4.添加DateTime对象
jxl.write.DateTime labelDT = new jxl.write.DateTime(0,3,new java.util.Date());
sheet.addCell(labelDT);

//添加带有formatting的DateFormat对象
jxl.write.DateFormat df = new jxl.write.DateFormat("ddMMyyyyhh:mm:ss");
jxl.write.WritableCellFormat wcfDF = new jxl.write.WritableCellFormat(df);
jxl.write.DateTime labelDTF = new jxl.write.DateTime(1,3,new java.util.Date(),wcfDF);
sheet.addCell(labelDTF);

//和宾单元格
//sheet.mergeCells(int col1,int row1,int col2,int row2);//左上角到右下角
sheet.mergeCells(4,5,8,10);//左上角到右下角
wfc = new jxl.write.WritableFont(WritableFont.ARIAL,40,WritableFont.BOLD,false,jxl.format.UnderlineStyle.NO_UNDERLINE,jxl.format.Colour.GREEN);
jxl.write.WritableCellFormat wchB = new jxl.write.WritableCellFormat(wfc);
wchB.setAlignment(jxl.format.Alignment.CENTRE);
labelCFC = new jxl.write.Label(4,5,"单元合并",wchB);
sheet.addCell(labelCFC); //

//设置边框
jxl.write.WritableCellFormat wcsB = new jxl.write.WritableCellFormat();
wcsB.setBorder(jxl.format.Border.ALL,jxl.format.BorderLineStyle.THICK);
labelCFC = new jxl.write.Label(0,6,"边框设置",wcsB);
sheet.addCell(labelCFC);
workbook.write();
workbook.close();
}catch(Exception e)
{
e.printStackTrace();
}
System.out.println("end");
Runtime r=Runtime.getRuntime();
Process p=null;
//String cmd[]={"notepad","exec.java"};
String cmd[]={"C:\\Program Files\\Microsoft Office\\Office\\EXCEL.EXE","out.xls"};
try{
p=r.exec(cmd);
}
catch(Exception e){
System.out.println("error executing: "+cmd[0]);
}

}
}