java导出xls

package com.spring.mvc.xls;

import java.io.File;
import java.io.FileInputStream;
import java.text.DecimalFormat;
import java.util.Date;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.Properties;
import java.util.Set;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFCellStyle;
import org.apache.poi.hssf.usermodel.HSSFDataFormat;
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.Region;
import org.apache.poi.poifs.filesystem.POIFSFileSystem;

/**
* 功能描述: Excel操纵类

* @date: 2013-4-13
*/
public class ExcelTemplate {
private static Log logger = LogFactory.getLog(ExcelTemplate.class);
private static final String DATAS = "datas";

private HSSFWorkbook workbook;
private HSSFSheet sheet;
private HSSFRow currentRow;
private Map styles = new HashMap(); //数据行的默认样式配置
private Map confStyles = new HashMap(); //通过设置"#STYLE_XXX"来标识的样式配置
private int initrow; //数据输出起始行
private int initcol; //数据输出起始列
private int num; //index number
private int currentcol; //当前列
private int currentRowIndex; //当前行index
private int rowheight = 22; //行高
private int lastLowNum = 0;
private String cellStyle = null;

private ExcelTemplate() {
}

/**
* 使用默认模板创建ExcelTemplate对象
* @return 根据模板已初始化完成的ExcelTemplate对象
*/
public ExcelTemplate newInstance(){
return newInstance("templates/default.xls");
}

/**
* 指定模板创建ExcelTemplate对象
* @param templates 模板名称
* @return 根据模板已初始化完成的ExcelTemplate对象
*/
public static ExcelTemplate newInstance(String templates){
try {
ExcelTemplate excel = new ExcelTemplate();
POIFSFileSystem fs = new POIFSFileSystem(new FileInputStream(new File(templates)));
excel.workbook = new HSSFWorkbook(fs);
excel.sheet = excel.workbook.getSheetAt(0);
//查找配置
excel.initConfig();
//查找其它样式配置
excel.readCellStyles();
//删除配置行
excel.sheet.removeRow( excel.sheet.getRow(excel.initrow) );
return excel;
} catch (Exception e) {
e.printStackTrace();
logger.trace("创建Excel对象出现异常",e);
throw new RuntimeException("创建Excel对象出现异常");
}
}


/**
* 设置特定的单元格样式，此样式可以通过在模板文件中定义"#STYLE_XX"来得到，如：
* #STYLE_1，传入的参数就是"STYLE_1"
* @param style
*/
public void setCellStyle(String style){
cellStyle = style;
}

/**
* 取消特定的单元格格式，恢复默认的配置值，即DATAS所在行的值
*/
public void setCellDefaultStyle(){
cellStyle = null;
}

/**
* 创建新行
* @param index 从0开始计数
*/
public void createRow(int index){
//如果在当前插入数据的区域有后续行，则将其后面的行往后移动
if(lastLowNum > initrow && index > 0){
sheet.shiftRows(index + initrow ,lastLowNum + index,1,true,true);
}
currentRow = sheet.createRow(index + initrow);
currentRow.setHeight((short)rowheight);
currentRowIndex = index;
currentcol = initcol;
}
public HSSFCell getCell(int row,int column){
HSSFCell cell=null;
try{
cell=sheet.getRow(row).getCell(column);
}catch(Exception e){}
return cell;
}
/**
* 根据传入的字符串值，在当前行上创建新列
* @param value 列的值（字符串）
*/
public void createCell(String value){
HSSFCell cell = createCell();
cell.setCellType(HSSFCell.CELL_TYPE_STRING);
cell.setCellValue(value);
}
public void createCell(float value){
HSSFCell cell = createCell();
HSSFCellStyle cstyle = (HSSFCellStyle)confStyles.get(cellStyle);
if(null==cstyle){
cstyle=workbook.createCellStyle();
confStyles.put(cellStyle,cstyle);
}
cstyle.setDataFormat(HSSFDataFormat.getBuiltinFormat("0.00"));
cell.setCellStyle(cstyle);
cell.setCellType(HSSFCell.CELL_TYPE_NUMERIC);
DecimalFormat df=new DecimalFormat("#0.00");
cell.setCellValue(Double.parseDouble(df.format(value)));
}
public void createCell(double value){
HSSFCell cell = createCell();
HSSFCellStyle cstyle = (HSSFCellStyle)confStyles.get(cellStyle);
if(null==cstyle){
cstyle=workbook.createCellStyle();
confStyles.put(cellStyle,cstyle);
}
cstyle.setDataFormat(HSSFDataFormat.getBuiltinFormat("0.00"));
cell.setCellStyle(cstyle);
cell.setCellType(HSSFCell.CELL_TYPE_NUMERIC);
DecimalFormat df=new DecimalFormat("#0.00");
cell.setCellValue(Double.parseDouble(df.format(value)));
}
public void createDoubleCell(double value){
HSSFCell cell = createCell();
HSSFCellStyle cstyle = (HSSFCellStyle)confStyles.get(cellStyle);
if(null==cstyle){
cstyle=workbook.createCellStyle();
confStyles.put(cellStyle,cstyle);
}
cell.setCellType(HSSFCell.CELL_TYPE_NUMERIC);
cell.setCellValue(value);
}
public void createPercentageCell(double value){
HSSFCellStyle cellStyle = workbook.createCellStyle();
cellStyle.setDataFormat(HSSFDataFormat.getBuiltinFormat("0.00%"));

HSSFCell cell = createCell();
HSSFCellStyle cstyle = (HSSFCellStyle)confStyles.get(cellStyle);
if(null==cstyle){
cstyle=workbook.createCellStyle();
confStyles.put(cellStyle,cstyle);
}

cell.setCellStyle(cellStyle);
cell.setCellType(HSSFCell.CELL_TYPE_NUMERIC);
cell.setCellValue(value);
}
public void createNumberCell(Integer value){
HSSFCell cell = createCell();
cell.setCellType(HSSFCell.CELL_TYPE_NUMERIC);
cell.setCellValue(value);
}
public void createNumberCell(Long value){
HSSFCell cell = createCell();
cell.setCellType(HSSFCell.CELL_TYPE_NUMERIC);
cell.setCellValue(value);
}
/**
* 根据传入的日期值，在当前行上创建新列
* 在这种情况下（传入日期），你可以在模板中定义对应列
* 的日期格式，这样可以灵活通过模板来控制输出的日期格式
* @param value 日期
*/
public void createCell(Date value){
HSSFCell cell = createCell();
cell.setCellValue(value);
}

/**
* 创建当前行的序列号列，通常在一行的开头便会创建
* 注意要使用这个方法，你必需在创建行之前调用initPageNumber方法
*/
public void createSerialNumCell(){
HSSFCell cell = createCell();
cell.setCellValue(currentRowIndex + num);
}

@SuppressWarnings("deprecation")
private HSSFCell createCell(){
HSSFCell cell = currentRow.createCell((short)currentcol++);
// cell.setEncoding(HSSFCell.ENCODING_UTF_16);
HSSFCellStyle style = (HSSFCellStyle)styles.get(new Integer(cell.getCellNum()));
if(style != null){
cell.setCellStyle(style);
}

//设置了特定格式
if(cellStyle != null){
HSSFCellStyle ts = (HSSFCellStyle)confStyles.get(cellStyle);
if(ts != null){
cell.setCellStyle(ts);
}
}
return cell;
}

/**
* 获取当前HSSFWorkbook的实例
* @return
*/
public HSSFWorkbook getWorkbook(){
return workbook;
}

/**
* 获取模板中定义的单元格样式，如果没有定义，则返回空
* @param style 模板定义的样式名称
* @return 模板定义的单元格的样式，如果没有定义则返回空
*/
public HSSFCellStyle getTemplateStyle(String style){
return (HSSFCellStyle)confStyles.get(style);
}

/**
* 替换模板中的文本参数
* 参数以“#”开始
* @param props
*/
public void replaceParameters(Properties props){
if(props == null || props.size() == 0){
return;
}
Set propsets = props.entrySet();
Iterator rowit = sheet.rowIterator();
while(rowit.hasNext()){
HSSFRow row = (HSSFRow)rowit.next();
if(row == null) continue;
int cellLength = row.getLastCellNum();
for(int i=0; i<cellLength; i++){
HSSFCell cell = (HSSFCell)row.getCell((short)i);
if(cell == null) continue;
String value = cell.getStringCellValue();
if(value != null && value.indexOf("#") != -1){
for (Iterator iter = propsets.iterator(); iter.hasNext();) {
Map.Entry entry = (Map.Entry) iter.next();
value = value.replaceAll("#"+entry.getKey(),(String)entry.getValue());
}
}
// cell.setEncoding(HSSFCell.ENCODING_UTF_16);
cell.setCellValue(value);
}
}
}

/**
* 初始化Excel配置
*/
private void initConfig(){
lastLowNum = sheet.getLastRowNum();
Iterator rowit = sheet.rowIterator();
boolean configFinish = false;
while(rowit.hasNext()){
if(configFinish){
break;
}
HSSFRow row = (HSSFRow)rowit.next();
if(row == null) continue;
int cellLength = row.getLastCellNum();
int rownum = row.getRowNum();
for(int i=0; i<cellLength; i++){
HSSFCell cell = (HSSFCell)row.getCell((short)i);
if(cell == null) continue;
String config = cell.getStringCellValue();
if(DATAS.equalsIgnoreCase(config)){
//本行是数据开始行和样式配置行，需要读取相应的配置信息
initrow = row.getRowNum();
rowheight = row.getHeight();
initcol = cell.getCellNum();
configFinish = true;
}
if(configFinish){
readCellStyle(cell);
}
}
}
}

/**
* 读取cell的样式
* @param cell
*/
@SuppressWarnings("unchecked")
private void readCellStyle(HSSFCell cell){
HSSFCellStyle style = cell.getCellStyle();
if(style == null) return;

styles.put(new Integer(cell.getCellNum()),style);
}

/**
* 读取模板中其它单元格的样式配置
*/
private void readCellStyles(){
Iterator rowit = sheet.rowIterator();
while(rowit.hasNext()){
HSSFRow row = (HSSFRow)rowit.next();
if(row == null) continue;
int cellLength = row.getLastCellNum();
for(int i=0; i<cellLength; i++){
HSSFCell cell = (HSSFCell)row.getCell((short)i);
if(cell == null) continue;
String value = cell.getStringCellValue();
if(value != null && value.indexOf("#STYLE_") != -1){
HSSFCellStyle style = cell.getCellStyle();
if(style == null) continue;
confStyles.put(value.substring(1),style);
//remove it
row.removeCell(cell);
}
}
}
}
public void setValue(int rowNum,int colNum,String value){
HSSFRow row=this.sheet.getRow(rowNum);
HSSFCell cell=row.getCell((short)colNum);
if (cell==null){
cell = row.createCell((short) colNum);
}
// cell.setEncoding(HSSFCell.ENCODING_UTF_16);
cell.setCellValue(value);
}
public void mergedRegion(int rowNum,int colNum,int cols,int rows){
sheet.addMergedRegion(new Region(rowNum,(short)colNum,cols,(short)rows));
}
}

//封装导出xls方法

package com.spring.mvc.xls;

import java.io.IOException;
import java.util.List;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;

/**
* @description 功能描述: 导出xls方法
* @author 作 者: 周志伟
* @param 参 数:
* @createdate 建立日期： 2014-8-1下午3:38:52
* @projectname 项目名称: spring_mvc
* @packageclass 包及类名: com.spring.mvc.xls.Xls.java
*/
public class Xls {

/**
* @projectname 项目名称: spring_mvc
* @packageclass 包及类名: com.spring.mvc.xls.Xls.java
* @description 功能描述: 导出xls方法
* @author 作 者: 周志伟
* @param 参 数: @param response
* @param 参 数: @param xls 模板名字
* @param 参 数: @param xlsname 生成xls标题
* @param 参 数: @param list 结果集
* @param 参 数: @throws IOException
* @return 返回类型: void
* @createdate 建立日期: 2014-8-1下午3:37:42
*/
@SuppressWarnings("unused")
@RequestMapping(value = "aee")

public static void dataWrite(HttpServletResponse response,String xls,String xlsname,List list) throws IOException{
int count=0;
HttpServletRequest req =((ServletRequestAttributes)RequestContextHolder.getRequestAttributes()).getRequest();
@SuppressWarnings("deprecation")
String realpath = req.getRealPath("/static/template/"+xls+".xls");
ExcelTemplate template =ExcelTemplate.newInstance(realpath);
for (int i = 0; i < list.size(); i++) {
List tmp=(List)list.get(i);
template.createRow(count);
template.createNumberCell(Integer.valueOf(count+1));
for (int j = 1; j < tmp.size()-1; j++) {
template.createCell(tmp.get(j).toString());
}
count++;
}
response.reset();
response.setContentType("application/x-download;charset=GBK");
response.setHeader("Content-Disposition", "attachment;filename="+java.net.URLEncoder.encode(xlsname + ".xls", "UTF-8"));
template.getWorkbook().write(response.getOutputStream());
response.getOutputStream().flush();
response.getOutputStream().close();
}
}

在控制层调用

/**
* @projectname 项目名称: spring_mvc
* @packageclass 包及类名: com.spring.mvc.Test.java
* @description 功能描述: 导出xls
* @author 作 者: 周志伟
* @param 参 数: @param response
* @param 参 数: @throws Exception
* @return 返回类型: void
* @createdate 建立日期: 2014-8-1下午3:45:54
*/
@RequestMapping(value = "xls")

public void xls(HttpServletResponse response) throws Exception{
List list = new ArrayList();
list=testservice.tu();
Xls.dataWrite(response, "expContractList", "合同", list);
}