用POI加载模板生成excel报表

加载模板生成excel报表

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package com.stake.mis.baobiao;

import java.io.FileInputStream;

import java.io.FileNotFoundException;

import java.io.FileOutputStream;

import java.io.IOException;

import java.util.ArrayList;

import java.util.List;

import javax.servlet.ServletOutputStream;

import org.apache.poi.hssf.usermodel.HSSFCell;

import org.apache.poi.hssf.usermodel.HSSFCellStyle;

import org.apache.poi.hssf.usermodel.HSSFFont;

import org.apache.poi.hssf.usermodel.HSSFFooter;

import org.apache.poi.hssf.usermodel.HSSFRow;

import org.apache.poi.hssf.usermodel.HSSFSheet;

import org.apache.poi.hssf.usermodel.HSSFWorkbook;

import org.apache.poi.hssf.util.HSSFColor;

import org.apache.poi.hssf.util.Region;

import com.stake.mis.bean.User ;

public class ExeclManager {

/**

* list 存放查询返回得结果列表

* sheetname excel模板中sheet得名字

* out 输出流对象

/

public void getMainCardExcel(List list,String filepath,String sheetname,ServletOutputStream out) throws FileNotFoundException, IOException

{

// 读取工作簿

System.out.println(filepath);

HSSFWorkbook workbook =new HSSFWorkbook(new FileInputStream(filepath));

try

{

//读取工作表

HSSFSheet sheet = workbook.getSheet(sheetname);

HSSFRow row;

HSSFCell cell = null;

int a = 8;

HSSFCellStyle style = this.getStyle(workbook);

for(int i =0;i<list.size();i++)

{

//从查询结果列表中获取对象

User user = (User )list.get(i);

//该行以前得部分从模板中取得;

row = sheet.createRow(a);

cell = row.createCell((short) 0,HSSFCellStyle.ALIGN_CENTER);

cell.setCellType(HSSFCell.CELL_TYPE_STRING);

cell.setEncoding(HSSFCell.ENCODING_UTF_16);

cell.setCellValue(i+1);

cell.setCellStyle(style);

cell = row.createCell((short) 1,HSSFCellStyle.ALIGN_CENTER);

cell.setCellType(HSSFCell.CELL_TYPE_STRING);

cell.setEncoding(HSSFCell.ENCODING_UTF_16);

cell.setCellValue(mc.getUserName());

cell.setCellStyle(style);

cell = row.createCell((short) 2,HSSFCellStyle.ALIGN_CENTER);

cell.setCellType(HSSFCell.CELL_TYPE_STRING);

cell.setEncoding(HSSFCell.ENCODING_UTF_16);

cell.setCellValue(mc.getUserAge());

cell.setCellStyle(style);

cell = row.createCell((short) 3,HSSFCellStyle.ALIGN_CENTER);

cell.setCellType(HSSFCell.CELL_TYPE_STRING);

cell.setEncoding(HSSFCell.ENCODING_UTF_16);

cell.setCellValue(mc.get某属性());

cell.setCellStyle(style);

cell = row.createCell((short) 4,HSSFCellStyle.ALIGN_CENTER);

cell.setCellType(HSSFCell.CELL_TYPE_STRING);

cell.setEncoding(HSSFCell.ENCODING_UTF_16);

cell.setCellValue(mc.getEq某属性());

cell.setCellStyle(style);

a++;

}

workbook.write(out);

out.flush();

out.close();

}

catch(Exception e)

{

e.printStackTrace();

}

}

public HSSFCellStyle getStyle(HSSFWorkbook workbook)

{

// 设置字体;

HSSFFont font = workbook.createFont();

//设置字体大小;

font.setFontHeightInPoints((short)9);

//设置字体名字;

font.setFontName("Courier New");

//font.setItalic(true);

//font.setStrikeout(true);

// 设置样式;

HSSFCellStyle style = workbook.createCellStyle();

//设置底边框;

style.setBorderBottom(HSSFCellStyle.BORDER_THIN);

//设置底边框颜色;

style.setBottomBorderColor(HSSFColor.BLACK.index);

//设置左边框;

style.setBorderLeft(HSSFCellStyle.BORDER_THIN);

//设置左边框颜色;

style.setLeftBorderColor(HSSFColor.BLACK.index);

//设置右边框;

style.setBorderRight(HSSFCellStyle.BORDER_THIN);

//设置右边框颜色;

style.setRightBorderColor(HSSFColor.BLACK.index);

//设置顶边框;

style.setBorderTop(HSSFCellStyle.BORDER_THIN);

//设置顶边框颜色;

style.setTopBorderColor(HSSFColor.BLACK.index);

//在样式用应用设置的字体;

style.setFont(font);

//设置自动换行;

style.setWrapText(false);

//设置水平对齐的样式为居中对齐;

style.setAlignment(HSSFCellStyle.ALIGN_CENTER);

//设置垂直对齐的样式为居中对齐;

style.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);

return style;

}

}

strut的action某方法中在获取查询结果后的部分代码

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List list = null;

String filename = "";

//action中调用service对象的方法,查询User信息;

list = service.queryUser(查询约束);

ExeclManager ma = new ExeclManager();

//设置响应的编码方式;

response.setCharacterEncoding("gb2312");

filename = filename + "设备台账.xls";

response.addHeader("Content-Disposition","attachment;filename="+java.net.URLEncoder.encode(filename, "utf-8"));

response.setContentType("application/vnd.ms-excel;charset=gb2312");

//excel模板所在的位置;

String filepath = this.getServlet().getServletContext().getRealPath("/bbmanage");

ServletOutputStream out = response.getOutputStream();

//模板名称为example.xls;Sheet1为模板中sheet的名称

//调用方法生成excel;

ma.getMainCardExcel(list, filepath+"/example.xls", "Sheet1",out);