Java web项目利用POI导出excel

今天做项目需要导出excel文件，采用POI生成excel结构。方式如下：（解决了中文名称下载问题）

方式一:

import java.io.ByteArrayOutputStream;
import java.io.OutputStream;
import java.io.UnsupportedEncodingException;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.List;

import javax.servlet.http.HttpServletResponse;

import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFCellStyle;
import org.apache.poi.hssf.usermodel.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.struts2.ServletActionContext;

import com.opensymphony.xwork2.ActionSupport;

public class ProcessExcelAction extends ActionSupport {

public void export() {
// 第一步，创建一个webbook，对应一个Excel文件
HSSFWorkbook wb = new HSSFWorkbook();
// 第二步，在webbook中添加一个sheet,对应Excel文件中的sheet
HSSFSheet sheet = wb.createSheet("学生表一");
// 第三步，在sheet中添加表头第0行,注意老版本poi对Excel的行数列数有限制short
HSSFRow row = sheet.createRow((int) 0);
// 第四步，创建单元格，并设置值表头 设置表头居中
HSSFCellStyle style = wb.createCellStyle();
style.setAlignment(HSSFCellStyle.ALIGN_CENTER); // 创建一个居中格式
String fileName = "学生.xls";
HttpServletResponse response = ServletActionContext.getResponse();
this.setResponseHeader(response, fileName);
HSSFCell cell = row.createCell(0);
cell.setCellValue("学号");
cell.setCellStyle(style);
cell = row.createCell(1);
cell.setCellValue("姓名");
cell.setCellStyle(style);
cell = row.createCell(2);
cell.setCellValue("年龄");
cell.setCellStyle(style);
cell = row.createCell(3);
cell.setCellValue("生日");
cell.setCellStyle(style);

// 第五步，写入实体数据 实际应用中这些数据从数据库得到，
List<Student> list = gainStudent();

for (int i = 0; i < list.size(); i++) {
row = sheet.createRow((int) i + 1);
Student stu = (Student) list.get(i);
// 第四步，创建单元格，并设置值
row.createCell(0).setCellValue((double) stu.getId());
row.createCell(1).setCellValue(stu.getName());
row.createCell(2).setCellValue((double) stu.getAge());
cell = row.createCell(3);
cell.setCellValue(new SimpleDateFormat("yyyy-mm-dd").format(stu
.getBirth()));
}
// 第六步，将文件存到指定位置
try {
OutputStream os = response.getOutputStream();
wb.write(os);
os.flush();
os.close();
} catch (Exception e) {
e.printStackTrace();
}
}

public void setResponseHeader(HttpServletResponse response, String fileName) {
try {
try {
fileName = new String(fileName.getBytes(),"ISO8859-1");
} catch (UnsupportedEncodingException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
response
.setContentType("application/octet-stream;charset=ISO8859-1");
response.setHeader("Content-Disposition", "attachment;filename="
+ fileName);
response.addHeader("Pargam", "no-cache");
response.addHeader("Cache-Control", "no-cache");
} catch (Exception ex) {
ex.printStackTrace();
}
}

private List<Student> gainStudent() {
List<Student> list = new ArrayList<Student>();
SimpleDateFormat df = new SimpleDateFormat("yyyy-mm-dd");
try {
Student user1 = new Student(1, "张三", 16, df.parse("1997-03-12"));
Student user2 = new Student(2, "李四", 17, df.parse("1996-08-12"));
Student user3 = new Student(3, "王五", 26, df.parse("1985-11-12"));
list.add(user1);
list.add(user2);
list.add(user3);
} catch (ParseException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}

return list;
}

}

方式二:

import java.io.InputStream;
import java.io.OutputStream;
import java.io.UnsupportedEncodingException;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.List;
import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFCellStyle;
import org.apache.poi.hssf.usermodel.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import com.opensymphony.xwork2.ActionSupport;
import com.sun.xml.internal.messaging.saaj.util.ByteInputStream;
import com.sun.xml.internal.messaging.saaj.util.ByteOutputStream;
public class ProcessExcelAction1 extends ActionSupport {
private String fileName = "学生.xls";
private InputStream downloadStream ;
public String export() {
// 第一步，创建一个 webbook，对应一个Excel文件
HSSFWorkbook wb = new HSSFWorkbook();
// 第二步，在 webbook中添加一个sheet,对应Excel文件中的sheet
HSSFSheet sheet = wb.createSheet( "学生表一" );
// 第三步，在sheet中添加表头第0行,注意老版本 poi对Excel的行数列数有限制short
HSSFRow row = sheet.createRow(( int ) 0);
// 第四步，创建单元格，并设置值表头 设置表头居中
HSSFCellStyle style = wb.createCellStyle();
style.setAlignment(HSSFCellStyle. ALIGN_CENTER ); // 创建一个居中格式
HSSFCell cell = row.createCell(0);
cell.setCellValue( "学号" );
cell.setCellStyle(style);
cell = row.createCell(1);
cell.setCellValue( "姓名" );
cell.setCellStyle(style);
cell = row.createCell(2);
cell.setCellValue( "年龄" );
cell.setCellStyle(style);
cell = row.createCell(3);
cell.setCellValue( "生日" );
cell.setCellStyle(style);
// 第五步，写入实体数据 实际应用中这些数据从数据库得到，
List<Student> list = gainStudent();
for (int i = 0; i < list.size(); i++) {
row = sheet.createRow(( int ) i + 1);
Student stu = (Student) list.get(i);
// 第四步，创建单元格，并设置值
row.createCell(0).setCellValue(( double ) stu.getId());
row.createCell(1).setCellValue(stu.getName());
row.createCell(2).setCellValue(( double ) stu.getAge());
cell = row.createCell(3);
cell.setCellValue( new SimpleDateFormat("yyyy-mm-dd" ).format(stu
.getBirth()));
}
// 第六步，将文件存到指定位置
try {
ByteOutputStream bos = new ByteOutputStream();
wb.write(bos);
bos.flush();
byte [] byteArray = bos.getBytes();
downloadStream = new ByteInputStream(byteArray, 0, byteArray.length );
bos.close();
} catch (Exception e) {
e.printStackTrace();
}
return SUCCESS ;
}
private List<Student> gainStudent() {
List<Student> list = new ArrayList<Student>();
SimpleDateFormat df = new SimpleDateFormat("yyyy-mm-dd" );
try {
Student user1 = new Student(1, "张三" , 16, df.parse("1997-03-12" ));
Student user2 = new Student(2, "李四" , 17, df.parse("1996-08-12" ));
Student user3 = new Student(3, "王五" , 26, df.parse("1985-11-12" ));
list.add(user1);
list.add(user2);
list.add(user3);
} catch (ParseException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return list;
}
public void setFileName(String fileName) {
this .fileName = fileName;
}
public String getFileName() {
try {
fileName = new String(fileName .getBytes(),"ISO8859-1" );
} catch (UnsupportedEncodingException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return fileName ;
}
public void setDownloadStream(InputStream downloadStream) {
this .downloadStream = downloadStream;
}
public InputStream getDownloadStream() {
return downloadStream ;
}
}

[align=left]struts2配置文件配置内容:[/align]

< result name ="success" type= "stream">
< param name ="contentType" > application/vnd.ms-excel</ param >
< param name ="contentDisposition" > attachment;filename=${fileName}</ param >
< param name ="bufferSize" > 1024</ param >
< param name ="inputName" > downloadStream</ param >
</ result>

[align=left]注意：以上红色字体为必须转换。若不转换会造成如下问题:[/align]
[align=left]方式一:[/align]
[align=left] 1.firefox可以正常下载，但是不能显示中文名称[/align]
[align=left] 2.ie正常[/align]
[align=left]方式二:[/align]
[align=left] 1.firefox可以正常下载，但是不能显示中文名称[/align]
[align=left] 2.ie下载报错[/align]
[align=left]添加红色文本区域，两种方法均正常[/align]