spring里结合POI生成EXCEL

spring里支持从数据动态生成PDF/XSL，PDF的很多例子了，而Spring可以结合Apache的POI包，来生成EXCEL的。
首先到http://jakarta.apache.org/poi/index.html去下载poi包，将其放到工程目录的WEB-INF/LIB下。

POI的具体操作例子可以到http://jakarta.apache.org/poi/hssf/quick-guide.html这里去看。
其实讲到底是利用了spring的ResourceBundleViewResolver的。

下面列一个一本书上的例子，以供备考

song.java
package springxls;

public class Song {
private String singer;
private String title;

public Song(String singer, String title) {
this.singer = singer;
this.title = title;
}
public String getSinger() {
return singer;
}
public String getTitle() {
return title;
}
}

控制器SongPageController .java

public class SongPageController extends AbstractController {
private String successView;
public void setSuccessView(String successView) {
this.successView = successView;
}

protected ModelAndView handleRequestInternal(HttpServletRequest request,
HttpServletResponse response)
throws Exception {
Map map = new HashMap();
List songList = new ArrayList();

songList.add(new Song("James Blunt", "Goodbye My Lover"));
songList.add(new Song("MC HotDog", "我行我素"));

map.put("songlist", songList);

return new ModelAndView(successView, map);

}
}

生成Xsl文件
mport java.util.Iterator;
import java.util.List;
import java.util.Map;

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

import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.springframework.web.servlet.view.document.AbstractExcelView;

public class SongXlsPage extends AbstractExcelView {
public void buildExcelDocument(
Map model, HSSFWorkbook workbook,
HttpServletRequest request, HttpServletResponse response)
throws Exception {

int sheetRowNum = 0;

//取得模型数据
List songs = (List)model.get("songlist");
Iterator<Song> iter = songs.iterator();
//创建工作表和标题
HSSFSheet sheet = workbook.createSheet("MySong");
HSSFRow titleRow = sheet.createRow((short) sheetRowNum++);
HSSFCell titleCell = titleRow.createCell((short) 0);
titleCell.setCellValue("My Songs");
//创建一个空行
sheet.createRow(sheetRowNum++);
//创建数据表头
String[] titles = {"Title", "Singer"};
HSSFRow dataTitleRow = sheet.createRow((short) sheetRowNum++);
for (int i = 0; i < titles.length; i++) {
HSSFCell cell = dataTitleRow.createCell((short)i);
cell.setCellValue(titles[i]);
}
//数据模型转换:创建表格数据
for (int i = sheetRowNum; i < songs.size() + sheetRowNum; i++) {
if (iter.hasNext()) {
Song song = iter.next();
HSSFRow dataRow = sheet.createRow((short)(i));
HSSFCell cell1 = dataRow.createCell((short)0);
//中文显示指定编码
cell1.setEncoding(HSSFCell.ENCODING_UTF_16);
HSSFCell cell2 = dataRow.createCell((short)1);
cell1.setCellValue(song.getTitle());
cell2.setCellValue(song.getSinger());
}
}
}
}

web.xml
<servlet>
<servlet-name>frontcontroller</servlet-name>
<servlet-class>
org.springframework.web.servlet.DispatcherServlet
</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>frontcontroller</servlet-name>
<url-pattern>*.do</url-pattern>
</servlet-mapping>

froncontroller-servlet.xml<beans>
<bean id="viewResolver"
class="org.springframework.web.servlet.view.ResourceBundleViewResolver">
<property name="basename">
<value>views</value>
</property>
</bean>

<bean id="defaultHandlerMapping"
class="org.springframework.web.servlet.handler.BeanNameUrlHandlerMapping"/>

<bean name="/viewsong-xls.do"
class="springxls.SongPageController">
<property name="successView" value="xlsSong"/>
</bean>
</beans>