JSP页面将数据从mysql导出到excel的Java代码

Posted 2023-04-18

在JSP页面，我想把数据导出到excel，就是点击一个导出按钮，选择要导出的路径，而不是指定路径，请问高手这个代码应该怎么写，我导入的过程是用jxl写的，导出应该怎么样写好呢~

jsp要从mysql导出数据到excel分两步操作：

后台查询mysql符合条件的数据，放在session中。

页面展示数据，并且控制导出，添加一个按钮，调用导出方法执行。

举例说明：

Java代码

sql = "select * from tablename";

rs = stmt.executeQuery(sql);

//新建Excel文件

String filePath=request.getRealPath("aaa.xls");

File myFilePath=new File(filePath);

if(!myFilePath.exists())

myFilePath.createNewFile();

FileWriter resultFile=new FileWriter(myFilePath);

PrintWriter myFile=new PrintWriter(resultFile);

resultFile.close();

//用JXL向新建的文件中添加内容

OutputStream outf = new FileOutputStream(filePath);

jxl.write.WritableWorkbook wwb = Workbook.createWorkbook(outf);

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

int i=0;

int j=0;

for (int k = 0; k < rs.getMetaData().getColumnCount(); k++)

ws.addCell(new Label(k,0,rs.getMetaData().getColumnName(k+1)));

while(rs.next())

out.println(rs.getMetaData().getColumnCount());

for (int k = 0; k < rs.getMetaData().getColumnCount(); k++)

ws.addCell(new Label(k,j+i+1,rs.getString(k+1)));

i++;

wwb.write();

wwb.close();

catch(Exception e)e.printStackTrace();

finally

rs.close();

conn.close();

response.sendRedirect("aaa.xls"); 

参考技术A 在servlet中处理 你可以在点击导出按钮的时候出发这个servlet然后通过设置response.setContentType("application/excel")来设置导出内容为excel文件，这样就可以了 参考技术B 导出一样的用jxl写。
//设置类型，下载
response.setContentType("application/x-download");
//设置保存的文件名
response.addHeader("Content-Disposition", "attachment;filename=" + filename);
//写文件
fs = response.getOutputStream();
while ((byteread = inStream.read(buffer)) >0)
fs.write(buffer, 0, byteread);

给出的都是关键代码，看一下应该就会懂了
fs.flush();本回答被提问者采纳

java jsp页面数据导入到excel中的问题

现在比如说数据库中有个学生表 ，现在吧表中的数据都查出来了放到jsp的表格中
现在在jsp页面上设置一个按钮，点击按钮后就把表格中的数据导入到excel中了，
用到的JXL技术 ，有人能帮我 该如何做 最好具体到 js方法 本人新手 越详细越好

一、列表页面的部分代码
[html] view plaincopy
<input type="button" class="cxBut2" value="导出数据" onclick="_export()"/>
[javascript] view plaincopy
function _export()
document.location.href="download.jsp?czId=<%=czId%>&czNum=<%=czNum%>&beginIssue=<%=beginIssue%>&endIssue=<%=endIssue%>&pageNum=<%=pageNum%>&czName="+$("#czId").find("option:selected").text();


二、download.jsp
[html] view plaincopy
<%@ page contentType="application/vnd.ms-excel" language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@page import="com.zhcw.kaijiang.service.ExportExcal"%>
<%@page import="java.io.OutputStream"%>
<%
String czNum = request.getParameter("czNum");
String czId = request.getParameter("czId");
String czName = request.getParameter("czName");
String beginIssue = request.getParameter("beginIssue");
String endIssue = request.getParameter("endIssue");
String pageNum = request.getParameter("pageNum");
response.resetBuffer();
response.setHeader("Content-Disposition", "attachment;filename="+ new String(czName.getBytes("UTF-8"), "iso8859-1")+".xls");//指定下载的文件名
response.setContentType("application/vnd.ms-excel");
try
ExportExcal exportExcal = new ExportExcal(beginIssue, czId, czName, czNum, endIssue, pageNum);
exportExcal.export(response.getOutputStream());
catch(Exception ex)
ex.printStackTrace();

%>

3.这个页面主要负责接收上一个页面传来的数据，然后调用后台相应的导出方法来实现导出功能。
注意：这两行代码必须要写：

[html] view plaincopy
response.resetBuffer();<pre name="code" class="html">response.setContentType("application/vnd.ms-excel");</pre>
<pre></pre>
<p></p>
<pre></pre>
<p></p>
<p></p>
三、后台处理类<pre name="code" class="java">package com.zhcw.kaijiang.service;

import java.io.File;
import java.io.FileOutputStream;
import java.io.OutputStream;
import java.text.DecimalFormat;
import java.util.List;

import jxl.Workbook;
import jxl.format.Alignment;
import jxl.format.Border;
import jxl.format.BorderLineStyle;
import jxl.write.Label;
import jxl.write.WritableCellFormat;
import jxl.write.WritableSheet;
import jxl.write.WritableWorkbook;

import com.common.PropertiesOperator;
import com.crawler.entity.KaiJiangInfo;
import com.zhcw.kaijiang.util.StringUtil;

/**
* 将查询出来的信息导出到excel中
*
* @author zhcw
*
*/
public class ExportExcal
private String czNum = "";
private String czId = "";
private String czName = "";
private String beginIssue = "";
private String endIssue = "";
private String pageNum = "";

public ExportExcal(String beginIssue, String czId, String czName, String czNum, String endIssue, String pageNum)
super();
this.beginIssue = (beginIssue == null ? "" : beginIssue);
this.endIssue = (endIssue == null ? "" : endIssue);
this.czId = (czId == null ? "" : czId);
this.czName = (czName == null ? "" : czName);
this.czNum = (czNum == null || czNum.trim().equals("") || czNum.trim().equals("null")) ? "30" : czNum;
this.pageNum = (pageNum == null || pageNum.trim().equals("") || pageNum.trim().equals("null")) ? "1" : pageNum;


public List<KaiJiangInfo> kaiJiangInfoList()
KaijiangInfoService kaijiangInfoService = new KaijiangInfoService();
if (this.beginIssue!=null && this.beginIssue.trim().length() > 0)
return kaijiangInfoService.getSplitPageByCzIdNew(Long.valueOf(this.czId), Integer.valueOf(pageNum), 400, this.beginIssue, this.endIssue);
else
return kaijiangInfoService.getSplitPageByCzIdNew(Long.valueOf(this.czId), Integer.valueOf(pageNum), Integer.parseInt(czNum));



public void export(OutputStream output) throws Exception
PropertiesOperator propertiesOperator = new PropertiesOperator();
String cz_id_css_1 = propertiesOperator.getMessage("cz_id_css_1") == null ? "" : propertiesOperator.getMessage("cz_id_css_1").trim();
String cz_id_css_2 = propertiesOperator.getMessage("cz_id_css_2") == null ? "" : propertiesOperator.getMessage("cz_id_css_2").trim();
String cz_id_css_3 = propertiesOperator.getMessage("cz_id_css_3") == null ? "" : propertiesOperator.getMessage("cz_id_css_3").trim();
String cz_id_css_4 = propertiesOperator.getMessage("cz_id_css_4") == null ? "" : propertiesOperator.getMessage("cz_id_css_4").trim();
String cz_id_css_5 = propertiesOperator.getMessage("cz_id_css_5") == null ? "" : propertiesOperator.getMessage("cz_id_css_5").trim();
if (StringUtil.contains(this.czId, cz_id_css_1))
this.exportSSQExcel(output);
else if (StringUtil.contains(this.czId, cz_id_css_2))
this.export3DExcel(output);


private void exportExcel(String type,OutputStream output) throws Exception
WritableWorkbook workbook = Workbook.createWorkbook(output);// 创建工作薄
WritableSheet sheet = workbook.createSheet(this.czName, 0);// 创建第一个工作表，name:工作表名称
//设置列宽度
sheet.setColumnView(0,7);
sheet.setColumnView(1,15);
sheet.setColumnView(2,13);
sheet.setColumnView(3,25);
sheet.setColumnView(4,15);
sheet.setColumnView(6,15);
sheet.setColumnView(8,15);
sheet.setColumnView(10,15);
sheet.setColumnView(11,15);
WritableCellFormat format = new WritableCellFormat();
format.setAlignment(Alignment.CENTRE);
format.setBorder(Border.ALL, BorderLineStyle.THIN);
int row = 0;
//合并标题行
sheet.mergeCells(0, row, 11, row);

// 合并
sheet.mergeCells(0, row + 1, 0, row + 2);
sheet.mergeCells(1, row + 1, 1, row + 2);
sheet.mergeCells(2, row + 1, 2, row + 2);
sheet.mergeCells(3, row + 1, 3, row + 2);
sheet.mergeCells(4, row + 1, 4, row + 2);
sheet.mergeCells(11, row + 1, 11, row + 2);

sheet.mergeCells(5, row + 1, 6, row + 1);
sheet.mergeCells(7, row + 1, 8, row + 1);
sheet.mergeCells(9, row + 1, 10, row + 1);

Label label = null;// 用于写入文本内容到工作表中去
// 开始写入第一行，即标题栏
if(this.beginIssue.length()>0)
label = new Label(0, row, czName+"从"+this.beginIssue+" 到 "+this.endIssue+"期的中奖信息",format);// 参数依次代表列数、行数、内容
sheet.addCell(label);// 写入单元格
else
label = new Label(0, row, czName+"的前 "+this.czNum+" 期的中奖信息",format);// 参数依次代表列数、行数、内容
sheet.addCell(label);// 写入单元格

//第二行写表头
label = new Label(10, num, df.format(kaiJiangInfo.getBonusThree()),format);// 参数依次代表列数、行数、内容
sheet.addCell(label);// 写入单元格
//只有双色球有奖池金额
if(type!=null && type.trim().equals("ssq"))
label = new Label(11, num, df.format(kaiJiangInfo.getBonusPool()),format);// 参数依次代表列数、行数、内容
sheet.addCell(label);// 写入单元格


workbook.write();
workbook.close();

private void exportSSQExcel(OutputStream output) throws Exception
this.exportExcel("ssq", output);


private void export3DExcel(OutputStream output) throws Exception
this.exportExcel("3d", output);


</pre><br>
<br>

<div style="padding-top:20px">
</div> 参考技术A function AllAreaExcel()
var oXL = new ActiveXObject("Excel.Application");
var oWB = oXL.Workbooks.Add();
var oSheet = oWB.ActiveSheet;
var sel=document.body.createTextRange();
sel.moveToElementText(export);
sel.select();
sel.execCommand("Copy");
oSheet.Paste();
oXL.Visible = true;


<input type="button" value="表格导入excel" onclick="AllAreaExcel();">
<table id="export"><tr><td></td></tr></table>

测试的时候把ie的安全中心设置下~允许脚本运行和加载追问

谢谢 有一个表格 然后下面设置个按钮 点击后 直接调用上面js代码就可以实现吗？不用牵扯到java类中的问题吗？

追答

不用~这纯粹的是脚本运行，和后台程序不搭边~

本回答被提问者采纳 参考技术B ----学生表----------
package com.util;

public class Employee
String empNo;
String empName;
String sex;
public String getEmpNo()
return empNo;

public void setEmpNo(String empNo)
this.empNo = empNo;

public String getEmpName()
return empName;

public void setEmpName(String empName)
this.empName = empName;

public String getSex()
return sex;

public void setSex(String sex)
this.sex = sex;




-------------------excel 导出------

package com.util;

import java.io.File;
import java.util.List;

import jxl.Workbook;
import jxl.write.Label;
import jxl.write.WritableSheet;
import jxl.write.WritableWorkbook;

public class ExcelTools

public String exportExcle(String ttype, List<Employee> list, String url)
java.util.Random rd = new java.util.Random();

String excelFile = ""+rd.nextLong();
String upload = excelFile + ".xls";
String exclepath = url + upload;
try
// 打开文件
WritableWorkbook book = Workbook
.createWorkbook(new File(exclepath));
// 生成名为“第一页”的工作表，参数0表示这是第一页
WritableSheet sheet = book.createSheet(ttype, 0);
// 在Label对象的构造子中指名单元格位置是第一列第一行(0,0)
// 以及单元格内容为test

Label lb = new Label(0,0,"学生号");
sheet.addCell(lb);
lb = new Label(0,1,"姓名");
sheet.addCell(lb);
lb = new Label(0,2,"性别");
sheet.addCell(lb);
int num = 1;
//集合写入excel
for (Employee ep : list)
lb = new Label(num,0,ep.getEmpNo());
sheet.addCell(lb);
lb = new Label(num,1,ep.getEmpName());
sheet.addCell(lb);
lb = new Label(num,2,ep.getSex());
sheet.addCell(lb);
num++;

book.write();
book.close();
catch (Exception e)
System.out.println(e);

return excelFile; //把excelFile放入session就可以到处excel了