POI实现导出的简单例子
2017-05-07 22:00
253 查看
Util:
import java.io.IOException;
import java.io.OutputStream;
import java.lang.reflect.Field;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.text.SimpleDateFormat;
import java.util.Collection;
import java.util.Date;
import java.util.Iterator;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFCellStyle;
import org.apache.poi.hssf.usermodel.HSSFClientAnchor;
import org.apache.poi.hssf.usermodel.HSSFComment;
import org.apache.poi.hssf.usermodel.HSSFFont;
import org.apache.poi.hssf.usermodel.HSSFPatriarch;
import org.apache.poi.hssf.usermodel.HSSFRichTextString;
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.ss.formula.functions.T;
public class ExportExcel<T>{
public void exportExcel(Collection<T> dataset, OutputStream out) {
exportExcel("POI导出EXCEL文档", null, dataset, out, "yyyy-MM-dd");
}
public void exportExcel(String[] headers, Collection<T> dataset,
OutputStream out) {
exportExcel("POI导出EXCEL文档", headers, dataset, out, "yyyy-MM-dd");
}
public void exportExcel(String[] headers, Collection<T> dataset,
OutputStream out, String pattern) {
exportExcel("POI导出EXCEL文档", headers, dataset, out, pattern);
}
/**
*
* @param title
* 表格标题名
* @param headers
* 表格属性列名数组
* @param dataset
* 需要显示的数据集合,集合中一定要放置符合javabean风格的类的对象。此方法支持的
* javabean属性的数据类型有基本数据类型及String,Date,byte[](图片数据)
* @param out
* 与输出设备关联的流对象,可以将EXCEL文档导出到本地文件或者网络中
* @param pattern
* 如果有时间数据,设定输出格式。默认为"yyy-MM-dd"
*/
@SuppressWarnings("unchecked")
public void exportExcel(String title, String[] headers,
Collection<T> dataset, OutputStream out, String pattern) {
// 声明一个工作薄
HSSFWorkbook workbook = new HSSFWorkbook();
// 生成一个表格
HSSFSheet sheet = workbook.createSheet(title);
// 设置表格默认列宽度为15个字节
sheet.setDefaultColumnWidth((short) 15);
// 生成一个样式
HSSFCellStyle style = workbook.createCellStyle();
// 设置这些样式
style.setFillForegroundColor
4000
(HSSFColor.SKY_BLUE.index);
style.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);
style.setBorderBottom(HSSFCellStyle.BORDER_THIN);
style.setBorderLeft(HSSFCellStyle.BORDER_THIN);
style.setBorderRight(HSSFCellStyle.BORDER_THIN);
style.setBorderTop(HSSFCellStyle.BORDER_THIN);
style.setAlignment(HSSFCellStyle.ALIGN_CENTER);
// 生成一个字体
HSSFFont font = workbook.createFont();
font.setColor(HSSFColor.VIOLET.index);
font.setFontHeightInPoints((short) 12);
font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);
// 把字体应用到当前的样式
style.setFont(font);
// 生成并设置另一个样式
HSSFCellStyle style2 = workbook.createCellStyle();
style2.setFillForegroundColor(HSSFColor.LIGHT_YELLOW.index);
style2.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);
style2.setBorderBottom(HSSFCellStyle.BORDER_THIN);
style2.setBorderLeft(HSSFCellStyle.BORDER_THIN);
style2.setBorderRight(HSSFCellStyle.BORDER_THIN);
style2.setBorderTop(HSSFCellStyle.BORDER_THIN);
style2.setAlignment(HSSFCellStyle.ALIGN_CENTER);
style2.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);
// 生成另一个字体
HSSFFont font2 = workbook.createFont();
font2.setBoldweight(HSSFFont.BOLDWEIGHT_NORMAL);
// 把字体应用到当前的样式
style2.setFont(font2);
// 声明一个画图的顶级管理器
HSSFPatriarch patriarch = sheet.createDrawingPatriarch();
// 定义注释的大小和位置,详见文档
HSSFComment comment = patriarch.createComment(new HSSFClientAnchor(0, 0, 0, 0, (short) 4, 2, (short) 6, 5));
// 设置注释内容
comment.setString(new HSSFRichTextString("可以在POI中添加注释!"));
// 设置注释作者,当鼠标移动到单元格上是可以在状态栏中看到该内容.
comment.setAuthor("leno");
//产生表格标题行
HSSFRow row = sheet.createRow(0);
for (short i = 0; i < headers.length; i++) {
HSSFCell cell = row.createCell(i);
cell.setCellStyle(style);
HSSFRichTextString text = new HSSFRichTextString(headers[i]);
cell.setCellValue(text);
}
//遍历集合数据,产生数据行
Iterator<T> it = dataset.iterator();
int index = 0;
while (it.hasNext()) {
index++;
row = sheet.createRow(index);
T t = (T) it.next();
//利用反射,根据javabean属性的先后顺序,动态调用getXxx()方法得到属性值
Field[] fields = t.getClass().getDeclaredFields();
for (short i = 0; i < fields.length; i++) {
HSSFCell cell = row.createCell(i);
cell.setCellStyle(style2);
Field field = fields[i];
String fieldName = field.getName();
String getMethodName = "get"
+ fieldName.substring(0, 1).toUpperCase()
+ fieldName.substring(1);
try {
Class tCls = t.getClass();
Method getMethod = tCls.getMethod(getMethodName,
new Class[] {});
Object value = getMethod.invoke(t, new Object[] {});
//判断值的类型后进行强制类型转换
String textValue = null;
// if (value instanceof Integer) {
// int intValue = (Integer) value;
// cell.setCellValue(intValue);
// } else if (value instanceof Float) {
// float fValue = (Float) value;
// textValue = new HSSFRichTextString(
// String.valueOf(fValue));
// cell.setCellValue(textValue);
// } else if (value instanceof Double) {
// double dValue = (Double) value;
// textValue = new HSSFRichTextString(
// String.valueOf(dValue));
// cell.setCellValue(textValue);
// } else if (value instanceof Long) {
// long longValue = (Long) value;
// cell.setCellValue(longValue);
// }
if (value instanceof Boolean) {
boolean bValue = (Boolean) value;
textValue = "男";
if (!bValue) {
textValue ="女";
}
} else if (value instanceof Date) {
Date date = (Date) value;
SimpleDateFormat sdf = new SimpleDateFormat(pattern);
textValue = sdf.format(date);
} else if (value instanceof byte[]) {
// 有图片时,设置行高为60px;
row.setHeightInPoints(60);
// 设置图片所在列宽度为80px,注意这里单位的一个换算
sheet.setColumnWidth(i, (short) (35.7 * 80));
// sheet.autoSizeColumn(i);
byte[] bsValue = (byte[]) value;
HSSFClientAnchor anchor = new HSSFClientAnchor(0, 0,
1023, 255, (short) 6, index, (short) 6, index);
anchor.setAnchorType(2);
patriarch.createPicture(anchor, workbook.addPicture(
bsValue, HSSFWorkbook.PICTURE_TYPE_JPEG));
} else{
//其它数据类型都当作字符串简单处理
textValue = value.toString();
}
//如果不是图片数据,就利用正则表达式判断textValue是否全部由数字组成
if(textValue!=null){
Pattern p = Pattern.compile("^//d+(//.//d+)?$");
Matcher matcher = p.matcher(textValue);
if(matcher.matches()){
//是数字当作double处理
cell.setCellValue(Double.parseDouble(textValue));
}else{
HSSFRichTextString richString = new HSSFRichTextString(textValue);
HSSFFont font3 = workbook.createFont();
font3.setColor(HSSFColor.BLUE.index);
richString.applyFont(font3);
cell.setCellValue(richString);
}
}
} catch (SecurityException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (NoSuchMethodException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IllegalArgumentException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IllegalAccessException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (InvocationTargetException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} finally {
//清理资源
}
}
}
try {
workbook.write(out);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
service:
略; 主要是从数据库中或者第三方接口中获取数据,返回一个数据集合。
controller:
/**
* 导出excel表格
*/
@SuppressWarnings("unchecked")
@ResponseBody
@RequestMapping("/getExportReportExcel")
public void exportReportExcel(HttpServletResponse response,String table_name,String dbid,String owner_name,String main_category_id,String start_time,String end_time){
@SuppressWarnings("rawtypes")
ExportExcel ex = new ExportExcel();
//定义标题
String[] headers = {"数据库", "用户", "表名", "中文名", "得分","域","一级分类","二级分类","属性","生命周期"};
//定义一个集合用于封装数据集
List<Object> dataset = new ArrayList<Object>();
//对数据的处理
Map<
aabd
String,Object> whereMap=new HashMap<String,Object>();
//封装查询条件
if(!StringUtil.isEmpty(table_name)){
whereMap.put("table_name", table_name);
}
if(!StringUtil.isEmpty(dbid)){
whereMap.put("dbid", dbid);
}
if(!StringUtil.isEmpty(owner_name)){
whereMap.put("owner_name",owner_name);
}
if(!StringUtil.isEmpty(main_category_id)){
whereMap.put("main_category_id",main_category_id);
}
if(!StringUtil.isEmpty(start_time)){
whereMap.put("start_time",start_time);
}
if(!StringUtil.isEmpty(end_time)){
whereMap.put("end_time",end_time);
}
//调用业务层获取查询数据
List<Object[]> datalist = pfmReportServiceImpl.getCommboxDataOfExport(whereMap);
DecimalFormat df=new DecimalFormat("###.##");
if(datalist!=null){
for (Object[] objects : datalist) {
String flname=objects[1]==null?"":objects[1].toString();
String
owner=objects[2]==null?"":objects[2].toString();
String tableName=objects[3]==null?"":objects[3].toString();
String china_table_name=objects[4]==null?"":objects[4].toString();
String score=objects[5]==null?"":objects[5].toString();
if(!score.equals("")){
double score_=Double.parseDouble(score);
score=df.format(score_);//分数保留两位
}
String domain_name=objects[6]==null?"":objects[6].toString();
String top_category_name=objects[11]==null?"":objects[11].toString();//一级类别
String second_category_name=objects[8]==null?"":objects[8].toString();//二级类别
String table_properties_name=objects[9]==null?"":objects[9].toString();
String datalife_cycle_name=objects[10]==null?"":objects[10].toString();
dataset.add(new PfmReportVO(flname,owner,tableName,china_table_name,score,domain_name,top_category_name,second_category_name,table_properties_name,datalife_cycle_name));
}
logger.info("查询得到的条数为:"+datalist.size());
}else{
//避免反射解析时因无数据而出现空指针
dataset.add(new PfmReportVO("","","","","","","","","",""));
logger.info("查询得到的条数为:0");
}
try {
//设置响应编码
response.setCharacterEncoding("UTF-8");
String filename="report"+DateUtil.getCurrTime()+".xls";
//设置浏览器端下载
response.setHeader("Content-disposition", "attachment;filename=" + filename);
OutputStream os = response.getOutputStream();
ex.exportExcel(headers, dataset,os);
os.flush();
os.close();
} catch (Exception e) {
logger.error("导出文件出错,"+e);
}
}
import java.io.IOException;
import java.io.OutputStream;
import java.lang.reflect.Field;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.text.SimpleDateFormat;
import java.util.Collection;
import java.util.Date;
import java.util.Iterator;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFCellStyle;
import org.apache.poi.hssf.usermodel.HSSFClientAnchor;
import org.apache.poi.hssf.usermodel.HSSFComment;
import org.apache.poi.hssf.usermodel.HSSFFont;
import org.apache.poi.hssf.usermodel.HSSFPatriarch;
import org.apache.poi.hssf.usermodel.HSSFRichTextString;
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.ss.formula.functions.T;
public class ExportExcel<T>{
public void exportExcel(Collection<T> dataset, OutputStream out) {
exportExcel("POI导出EXCEL文档", null, dataset, out, "yyyy-MM-dd");
}
public void exportExcel(String[] headers, Collection<T> dataset,
OutputStream out) {
exportExcel("POI导出EXCEL文档", headers, dataset, out, "yyyy-MM-dd");
}
public void exportExcel(String[] headers, Collection<T> dataset,
OutputStream out, String pattern) {
exportExcel("POI导出EXCEL文档", headers, dataset, out, pattern);
}
/**
*
* @param title
* 表格标题名
* @param headers
* 表格属性列名数组
* @param dataset
* 需要显示的数据集合,集合中一定要放置符合javabean风格的类的对象。此方法支持的
* javabean属性的数据类型有基本数据类型及String,Date,byte[](图片数据)
* @param out
* 与输出设备关联的流对象,可以将EXCEL文档导出到本地文件或者网络中
* @param pattern
* 如果有时间数据,设定输出格式。默认为"yyy-MM-dd"
*/
@SuppressWarnings("unchecked")
public void exportExcel(String title, String[] headers,
Collection<T> dataset, OutputStream out, String pattern) {
// 声明一个工作薄
HSSFWorkbook workbook = new HSSFWorkbook();
// 生成一个表格
HSSFSheet sheet = workbook.createSheet(title);
// 设置表格默认列宽度为15个字节
sheet.setDefaultColumnWidth((short) 15);
// 生成一个样式
HSSFCellStyle style = workbook.createCellStyle();
// 设置这些样式
style.setFillForegroundColor
4000
(HSSFColor.SKY_BLUE.index);
style.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);
style.setBorderBottom(HSSFCellStyle.BORDER_THIN);
style.setBorderLeft(HSSFCellStyle.BORDER_THIN);
style.setBorderRight(HSSFCellStyle.BORDER_THIN);
style.setBorderTop(HSSFCellStyle.BORDER_THIN);
style.setAlignment(HSSFCellStyle.ALIGN_CENTER);
// 生成一个字体
HSSFFont font = workbook.createFont();
font.setColor(HSSFColor.VIOLET.index);
font.setFontHeightInPoints((short) 12);
font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);
// 把字体应用到当前的样式
style.setFont(font);
// 生成并设置另一个样式
HSSFCellStyle style2 = workbook.createCellStyle();
style2.setFillForegroundColor(HSSFColor.LIGHT_YELLOW.index);
style2.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);
style2.setBorderBottom(HSSFCellStyle.BORDER_THIN);
style2.setBorderLeft(HSSFCellStyle.BORDER_THIN);
style2.setBorderRight(HSSFCellStyle.BORDER_THIN);
style2.setBorderTop(HSSFCellStyle.BORDER_THIN);
style2.setAlignment(HSSFCellStyle.ALIGN_CENTER);
style2.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);
// 生成另一个字体
HSSFFont font2 = workbook.createFont();
font2.setBoldweight(HSSFFont.BOLDWEIGHT_NORMAL);
// 把字体应用到当前的样式
style2.setFont(font2);
// 声明一个画图的顶级管理器
HSSFPatriarch patriarch = sheet.createDrawingPatriarch();
// 定义注释的大小和位置,详见文档
HSSFComment comment = patriarch.createComment(new HSSFClientAnchor(0, 0, 0, 0, (short) 4, 2, (short) 6, 5));
// 设置注释内容
comment.setString(new HSSFRichTextString("可以在POI中添加注释!"));
// 设置注释作者,当鼠标移动到单元格上是可以在状态栏中看到该内容.
comment.setAuthor("leno");
//产生表格标题行
HSSFRow row = sheet.createRow(0);
for (short i = 0; i < headers.length; i++) {
HSSFCell cell = row.createCell(i);
cell.setCellStyle(style);
HSSFRichTextString text = new HSSFRichTextString(headers[i]);
cell.setCellValue(text);
}
//遍历集合数据,产生数据行
Iterator<T> it = dataset.iterator();
int index = 0;
while (it.hasNext()) {
index++;
row = sheet.createRow(index);
T t = (T) it.next();
//利用反射,根据javabean属性的先后顺序,动态调用getXxx()方法得到属性值
Field[] fields = t.getClass().getDeclaredFields();
for (short i = 0; i < fields.length; i++) {
HSSFCell cell = row.createCell(i);
cell.setCellStyle(style2);
Field field = fields[i];
String fieldName = field.getName();
String getMethodName = "get"
+ fieldName.substring(0, 1).toUpperCase()
+ fieldName.substring(1);
try {
Class tCls = t.getClass();
Method getMethod = tCls.getMethod(getMethodName,
new Class[] {});
Object value = getMethod.invoke(t, new Object[] {});
//判断值的类型后进行强制类型转换
String textValue = null;
// if (value instanceof Integer) {
// int intValue = (Integer) value;
// cell.setCellValue(intValue);
// } else if (value instanceof Float) {
// float fValue = (Float) value;
// textValue = new HSSFRichTextString(
// String.valueOf(fValue));
// cell.setCellValue(textValue);
// } else if (value instanceof Double) {
// double dValue = (Double) value;
// textValue = new HSSFRichTextString(
// String.valueOf(dValue));
// cell.setCellValue(textValue);
// } else if (value instanceof Long) {
// long longValue = (Long) value;
// cell.setCellValue(longValue);
// }
if (value instanceof Boolean) {
boolean bValue = (Boolean) value;
textValue = "男";
if (!bValue) {
textValue ="女";
}
} else if (value instanceof Date) {
Date date = (Date) value;
SimpleDateFormat sdf = new SimpleDateFormat(pattern);
textValue = sdf.format(date);
} else if (value instanceof byte[]) {
// 有图片时,设置行高为60px;
row.setHeightInPoints(60);
// 设置图片所在列宽度为80px,注意这里单位的一个换算
sheet.setColumnWidth(i, (short) (35.7 * 80));
// sheet.autoSizeColumn(i);
byte[] bsValue = (byte[]) value;
HSSFClientAnchor anchor = new HSSFClientAnchor(0, 0,
1023, 255, (short) 6, index, (short) 6, index);
anchor.setAnchorType(2);
patriarch.createPicture(anchor, workbook.addPicture(
bsValue, HSSFWorkbook.PICTURE_TYPE_JPEG));
} else{
//其它数据类型都当作字符串简单处理
textValue = value.toString();
}
//如果不是图片数据,就利用正则表达式判断textValue是否全部由数字组成
if(textValue!=null){
Pattern p = Pattern.compile("^//d+(//.//d+)?$");
Matcher matcher = p.matcher(textValue);
if(matcher.matches()){
//是数字当作double处理
cell.setCellValue(Double.parseDouble(textValue));
}else{
HSSFRichTextString richString = new HSSFRichTextString(textValue);
HSSFFont font3 = workbook.createFont();
font3.setColor(HSSFColor.BLUE.index);
richString.applyFont(font3);
cell.setCellValue(richString);
}
}
} catch (SecurityException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (NoSuchMethodException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IllegalArgumentException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IllegalAccessException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (InvocationTargetException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} finally {
//清理资源
}
}
}
try {
workbook.write(out);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
service:
略; 主要是从数据库中或者第三方接口中获取数据,返回一个数据集合。
controller:
/**
* 导出excel表格
*/
@SuppressWarnings("unchecked")
@ResponseBody
@RequestMapping("/getExportReportExcel")
public void exportReportExcel(HttpServletResponse response,String table_name,String dbid,String owner_name,String main_category_id,String start_time,String end_time){
@SuppressWarnings("rawtypes")
ExportExcel ex = new ExportExcel();
//定义标题
String[] headers = {"数据库", "用户", "表名", "中文名", "得分","域","一级分类","二级分类","属性","生命周期"};
//定义一个集合用于封装数据集
List<Object> dataset = new ArrayList<Object>();
//对数据的处理
Map<
aabd
String,Object> whereMap=new HashMap<String,Object>();
//封装查询条件
if(!StringUtil.isEmpty(table_name)){
whereMap.put("table_name", table_name);
}
if(!StringUtil.isEmpty(dbid)){
whereMap.put("dbid", dbid);
}
if(!StringUtil.isEmpty(owner_name)){
whereMap.put("owner_name",owner_name);
}
if(!StringUtil.isEmpty(main_category_id)){
whereMap.put("main_category_id",main_category_id);
}
if(!StringUtil.isEmpty(start_time)){
whereMap.put("start_time",start_time);
}
if(!StringUtil.isEmpty(end_time)){
whereMap.put("end_time",end_time);
}
//调用业务层获取查询数据
List<Object[]> datalist = pfmReportServiceImpl.getCommboxDataOfExport(whereMap);
DecimalFormat df=new DecimalFormat("###.##");
if(datalist!=null){
for (Object[] objects : datalist) {
String flname=objects[1]==null?"":objects[1].toString();
String
owner=objects[2]==null?"":objects[2].toString();
String tableName=objects[3]==null?"":objects[3].toString();
String china_table_name=objects[4]==null?"":objects[4].toString();
String score=objects[5]==null?"":objects[5].toString();
if(!score.equals("")){
double score_=Double.parseDouble(score);
score=df.format(score_);//分数保留两位
}
String domain_name=objects[6]==null?"":objects[6].toString();
String top_category_name=objects[11]==null?"":objects[11].toString();//一级类别
String second_category_name=objects[8]==null?"":objects[8].toString();//二级类别
String table_properties_name=objects[9]==null?"":objects[9].toString();
String datalife_cycle_name=objects[10]==null?"":objects[10].toString();
dataset.add(new PfmReportVO(flname,owner,tableName,china_table_name,score,domain_name,top_category_name,second_category_name,table_properties_name,datalife_cycle_name));
}
logger.info("查询得到的条数为:"+datalist.size());
}else{
//避免反射解析时因无数据而出现空指针
dataset.add(new PfmReportVO("","","","","","","","","",""));
logger.info("查询得到的条数为:0");
}
try {
//设置响应编码
response.setCharacterEncoding("UTF-8");
String filename="report"+DateUtil.getCurrTime()+".xls";
//设置浏览器端下载
response.setHeader("Content-disposition", "attachment;filename=" + filename);
OutputStream os = response.getOutputStream();
ex.exportExcel(headers, dataset,os);
os.flush();
os.close();
} catch (Exception e) {
logger.error("导出文件出错,"+e);
}
}
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