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spring 生成Excel和PDF文件

HTML頁面并不總是向用戶顯示數據輸出的最好方式，有時候需要生成不可改變的文件打印，PDF可能是種不錯的選擇。

Spring支持從數據動態生成PDF或Excel文件

下面這個簡單實現的例子實現了spring輸出PDF和Excel文件，為了使用Excel電子表格，你需要在你的classpath中加入poi-2.5.1.jar庫文件，而對PDF文件，則需要iText.jar文件。它們都包含在Spring的主發布包中。

下面是測試項目代碼：

1、控制器配置代碼

<?xml?version="1.0"?encoding="UTF-8"?>

<!DOCTYPE?beans?PUBLIC?"-//SPRING//DTD?BEAN//EN"?"http://www.springframework.org/dtd/spring-beans.dtd">

<beans>

????<bean?id="beanNameViewResolver"

????????class="org.springframework.web.servlet.view.BeanNameViewResolver"?/>

????<bean?id="viewController"?class="com.zhupan.spring.ViewController"?/>

????<bean?id="urlMapping"

????????class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping">

????????<property?name="mappings">

????????????<props>

????????????????<prop?key="/view*.shtml">viewController</prop>

????????????</props>

????????</property>

????</bean>

</beans>

?3、用于Excel視圖的視圖子類化
為了在生成輸出文檔的過程中實現定制的行為，我們將繼承合適的抽象類。對于Excel，這包括提供一個 org.springframework.web.servlet.view.document.AbstractExcelView的子類，并實現 buildExcelDocument方法。

package?com.zhupan.view;

import?java.util.Date;

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.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.springframework.web.servlet.view.document.AbstractExcelView;

public?class?ViewExcel?extends?AbstractExcelView?{

??public?void?buildExcelDocument(

?????????????Map?model,?HSSFWorkbook?workbook,

?????????????HttpServletRequest?request,?HttpServletResponse?response)

????throws?Exception?{

???????HSSFSheet?sheet?=?workbook.createSheet("list");

???????sheet.setDefaultColumnWidth((short)?12);

???????

???????HSSFCell?cell?=?getCell(sheet,?0,?0);

???????setText(cell,?"Spring?Excel?test");

???????HSSFCellStyle?dateStyle?=?workbook.createCellStyle();

???????dateStyle.setDataFormat(HSSFDataFormat.getBuiltinFormat("m/d/yy"));

???????cell?=?getCell(sheet,?1,?0);

???????cell.setCellValue(new?Date());

???????cell.setCellStyle(dateStyle);

???????getCell(sheet,?2,?0).setCellValue(458);

???????HSSFRow?sheetRow?=?sheet.createRow(3);

???????for?(short?i?=?0;?i?<?10;?i++)?{

?????????????sheetRow.createCell(i).setCellValue(i?*?10);

???????}

??}

}

4、用于PDF視圖的視圖子類化
需要象下面一樣繼承org.springframework.web.servlet.view.document.AbstractPdfView，并實現buildPdfDocument()方法。

package?com.zhupan.view;

import?java.util.List;

import?java.util.Map;

import?javax.servlet.http.HttpServletRequest;

import?javax.servlet.http.HttpServletResponse;

import?org.springframework.web.servlet.view.document.AbstractPdfView;

import?com.lowagie.text.Document;

import?com.lowagie.text.Paragraph;

import?com.lowagie.text.pdf.PdfWriter;

public?class?ViewPDF?extends?AbstractPdfView?{

????public?void?buildPdfDocument(Map?model,?Document?document,

????????????PdfWriter?writer,?HttpServletRequest?request,

????????????HttpServletResponse?response)?throws?Exception?{

????????List?list?=?(List)?model.get("list");

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

????????????document.add(new?Paragraph((String)?list.get(i)));

????}

}

5、其他文件
1）控制器ViewController

package?com.zhupan.spring;

import?java.util.ArrayList;

import?java.util.HashMap;

import?java.util.List;

import?java.util.Map;

import?javax.servlet.http.HttpServletRequest;

import?javax.servlet.http.HttpServletResponse;

import?org.springframework.web.servlet.ModelAndView;

import?org.springframework.web.servlet.mvc.multiaction.MultiActionController;

import?com.zhupan.view.ViewExcel;

import?com.zhupan.view.ViewPDF;

public?class?ViewController?extends?MultiActionController{

?????

?????public?ModelAndView?viewPDF(HttpServletRequest?request,?HttpServletResponse?response)?throws?Exception?{

???????List?list?=?new?ArrayList();

???????Map?model=new?HashMap();

???????list.add("test1");

???????list.add("test2");

???????model.put("list",list);

???????ViewPDF?viewPDF=new?ViewPDF();

???????return?new?ModelAndView(viewPDF,model);

??}

?????

??????public?ModelAndView?viewExcel(HttpServletRequest?request,?HttpServletResponse?response)?throws?Exception?{

????????????List?list?=?new?ArrayList();

????????Map?model=new?HashMap();

????????list.add("test1");

????????list.add("test2");

????????model.put("list",list);

????????ViewExcel?viewExcel=new?ViewExcel();

????????return?new?ModelAndView(viewExcel,model);

??????}

}

2）web.xml

<?xml?version="1.0"?encoding="UTF-8"?>

<web-app?version="2.4"?xmlns="http://java.sun.com/xml/ns/j2ee"

????xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

????xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee?

????http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">

????<display-name>springPDFTest</display-name>

????<servlet>

????????<servlet-name>springPDFTest</servlet-name>

????????<servlet-class>

????????????org.springframework.web.servlet.DispatcherServlet

????????</servlet-class>

????????<load-on-startup>1</load-on-startup>

????</servlet>

????<servlet-mapping>

????????<servlet-name>springPDFTest</servlet-name>

????????<url-pattern>*.shtml</url-pattern>

????</servlet-mapping>

????<welcome-file-list>

????????<welcome-file>index.jsp</welcome-file>

????</welcome-file-list>

</web-app>

3)index.jsp

<%@?page?contentType="text/html;?charset=gb2312"%>

<a?href="viewPDF.shtml">PDF視圖打開?</a>

<br>

<a?href="viewExcel.shtml">Excel視圖打開</a>

posted on 2006-10-07 13:29 nbt 閱讀(649) 評論(0) 編輯收藏所屬分類: Spring框架

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