spring 生成Excel和PDF文件

HTML页面并不总是向用户显示数据输出的最好方式，有时候需要生成不可改变的文件打印，PDF可能是种不错的选择。

Spring支持从数据动态生成PDF或Excel文件

下面这个简单实现的例子实现了spring输出PDF和Excel文件，为了使用Excel电子表格，你需要在你的classpath中加入poi-2.5.1.jar库文件，而对PDF文件，则需要iText.jar文件。它们都包含在Spring的主发布包中。

下面是测试项目代码：

1、控制器配置代码

<?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="urlMapping"

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

<props>

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

</props>

</property>

</bean>

</beans>

3、用于Excel视图的视图子类化
为了在生成输出文档的过程中实现定制的行为，我们将继承合适的抽象类。对于Excel，这包括提供一个 org.springframework.web.servlet.view.document.AbstractExcelView的子类，并实现 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视图的视图子类化
需要象下面一样继承org.springframework.web.servlet.view.document.AbstractPdfView，并实现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-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视图打开 </a>

<br>

<a href="viewExcel.shtml">Excel视图打开</a>

posted on 2006-10-07 13:29 nbt 阅读(632) 评论(0) 编辑收藏所属分类: Spring框架

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