spring 生成pdf和 excel ,配置web.xml的正确配置

package com.execl;

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);
       }


  }
 
}


//////////////
public class ViewPDF extends AbstractPdfView {
    @SuppressWarnings("unchecked")
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)));
    }

}



////////////////////
package com.Controller.examp;

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.execl.ViewExcel;
import com.pdf.ViewPDF;


public class ViewController extends MultiActionController{
    
     @SuppressWarnings("unchecked")
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);
  }
    
      @SuppressWarnings("unchecked")
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);
      }
}


以下是 web.xml 配置   /////////////////


<?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>SprignExcelPdf</display-name> 
    <listener>
    <listener-class>
          org.springframework.web.context.ContextLoaderListener  
    </listener-class>
    </listener>

    <servlet> 
        <servlet-name>ViewController</servlet-name> 
        <servlet-class> 
            org.springframework.web.servlet.DispatcherServlet  
        </servlet-class> 
   </servlet> 
 
    <servlet-mapping> 
        <servlet-name>ViewController</servlet-name> 
        <url-pattern>*.shtml</url-pattern> 
    </servlet-mapping>
 
    <welcome-file-list> 
        <welcome-file>index.jsp</welcome-file> 
   </welcome-file-list> 

</web-app>

以下是 application.xml 配置   /////////////////

<?xml version="1.0" encoding="UTF-8"?>
<beans
xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd">

    <bean id="beanNameViewResolver" class="org.springframework.web.servlet.view.BeanNameViewResolver" />
       <bean id="viewController" class="com.Controller.examp.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>



每一个servlet对应一个<servlet>标记和一下<servlet-mapping> 如果web服务目录下有多个Servlet,可添加这些标记,
<servlet-name> 子标记表示Tomcat服务器创建Servlet对象的名字.
<url-pattern> 子标记表示通过url怎样访问该servlet.
当用户请求服务器运行一个servelet对象 时,需根据web.xml中<servlet-mapping>
标记指定的格式输入请求.
        <servlet-name>ViewController</servlet-name> 
        <url-pattern>/lookbook</url-pattern> 
像这样,只能 http://localhost:8080/example/lookbook  这样才能访问

里面的包自己导，刚开始的时候是 我是包导错了，搞了一天， 现在是    <listener>
    <listener-class>
          org.springframework.web.context.ContextLoaderListener  
    </listener-class>
    </listener>

这个东西刚开始没有加， 原来会报错，一直报文件找不到，NND网上找的不全，没有指出来，所以，加上这段，
ViewController-servlet.xml这个xml文件什么都没有，但是要建，如果没有的话，他会报找不到这个文件，搞不明白是什么。重新建这个后，
就没有问题了，一切到此结束，离下班还有3个小时。