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="viewController" class="com.zhupan.spring.ViewController" />  
        <bean id="urlMapping"  
           class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping">  
           <property name="mappings">  
               <props>  
                   <prop key="/view*.shtml">viewControllerprop>  
               <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);   
            }   
      
        }   
      
    }  

 

注意：如果要输出中文，需要制定编码

//中文显示指定编码

        cell1.setEncoding(HSSFCell.ENCODING_UTF_16);

 

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);   
  　     }   
  　 }   

  

<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>springPDFTestdisplay-name>  
         <servlet>  
             <servlet-name>springPDFTestservlet-name>  
            <servlet-class>  
                org.springframework.web.servlet.DispatcherServlet   
            <servlet-class>  
            <load-on-startup>1load-on-startup>  
        <servlet>  
      
        <servlet-mapping>  
            <servlet-name>springPDFTestservlet-name>  
            <url-pattern>*.shtmlurl-pattern>  
        <servlet-mapping>  
  　   
  　     <welcome-file-list>  
  　         <welcome-file>index.jspwelcome-file>  
  　     <welcome-file-list>  
  　   
  　 <web-app>

 

 3)index.jsp

<a href="viewPDF.shtml">PDF视图打开 a>
<br>
<a href="viewExcel.shtml">Excel视图打开a>

转载自：http://www.iteye.com/topic/26415