2015计算机二级考试指导:Java操作Excel、PDF文件(2)
发布时间：2010/3/10 16:17:22 来源：城市学习网 编辑：MOON
wbook.write(); // 写入文件
wbook.close();
os.close();
return "success";
}
}
public class ExcelBean {
public String expordExcel(OutputStream os， List courseList，List studentList)
throws Exception {
WritableWorkbook wbook = Workbook.createWorkbook(os); // 建立excel文件
String tmptitle = "课程“"+((Course_info)courseList.get(0)).getCource_name()+"”的选课学生列表"; // 标题
WritableSheet wsheet = wbook.createSheet("第一页"， 0); // sheet名称
// 设置excel标题
WritableFont wfont = new WritableFont(WritableFont.ARIAL， 16，
WritableFont.BOLD， false， UnderlineStyle.NO_UNDERLINE，
Colour.BLACK);
WritableCellFormat wcfFC = new WritableCellFormat(wfont);
wsheet.addCell(new Label(1， 0， tmptitle， wcfFC));
wfont = new jxl.write.WritableFont(WritableFont.ARIAL， 14，
WritableFont.BOLD， false， UnderlineStyle.NO_UNDERLINE，
Colour.BLACK);
wcfFC = new WritableCellFormat(wfont);
// 开始生成主体内容
wsheet.addCell(new Label(0， 2， "课程名称"));
wsheet.addCell(new Label(1， 2， "学 号"));
.........
for(int i=3;istudentList.size()+3;i++)
{
wsheet.addCell(new Label(0， i， ((Course_info)courseList.get(0)).getCource_name()));
wsheet.addCell(new Label(1， i， ((Student_info)studentList.get(0)).getStudentID()));
...........
}
// 主体内容生成结束
wbook.write(); // 写入文件
wbook.close();
os.close();
return "success";
}
}
控制器：
Java代码
public class EExcelDownController extends AbstractController {
private ICourse_infoManage courseManage;
public void setCourseManage(ICourse_infoManage courseManage) {
this.courseManage = courseManage;
}
@Override
protected ModelAndView handleRequestInternal(HttpServletRequest request，
HttpServletResponse response) throws Exception {
Integer course_id=new Integer(request.getParameter("course_id"));
List courseList=this.courseManage.getCourseById(course_id);
List studentList = this.courseManage.getStudentByCourseId(course_id);
try {
OutputStream os = response.getOutputStream();// 取得输出流
response.reset();// 清空输出流
response.setHeader("Content-disposition"， "attachment; filename=student.xls");// 设定输出文件头
response.setContentType("application/msexcel");// 定义输出类型
ExcelBean excelBean = new ExcelBean();
excelBean.expordExcel(os，courseList，studentList);// 调用生成excel文件bean
} catch (Exception e) {
System.out.println(e);
}
return null;
}
}
将Excel文件内容写入到数据库
Java代码
public class EStudentInsertExcelController extends SimpleFormController {
private IStudent_infoManage studentManage;
@Override
protected ModelAndView onSubmit(HttpServletRequest request，
HttpServletResponse response， Object command， BindException errors)
throws Exception {
Student_info student_info = (Student_info) command;
try {
MultipartHttpServletRequest multipartRequest = (MultipartHttpServletRequest) request;
MultipartFile file = multipartRequest.getFile( " Excelfile " ); // 获得文件：
File toFile = new File( " c:““学生信息临时文件.xls " ); // 产生文件名和空文件
file.transferTo(toFile); // 文件上传
Workbook book = Workbook.getWorkbook(toFile); // 得到工作薄
Sheet sheet = book.getSheet( 0 ); // 获得第一个工作表对象
int row = sheet.getRows(); // /得到该sheet的行数
int column = sheet.getColumns(); // 得到该sheet的列数
System.out.println( " 数据行数= " + row);
System.out.println( " 数据列数= " + column);
for ( int i = 1 ;i row;i ++ )
{
for ( int j = 0 ;j column;j ++ )
{
System.out.println( " j= " + j);
sheet.getCell(j， i).getContents(); // 得到第j列第i行的单元格的类容
student_info.setStudentID(sheet.getCell(j， i).getContents());
........................
}
if ( this .studentManage.getStudentByStudentID(
student_info.getStudentID()).size() != 0 )
return new ModelAndView( " education/e-studentInfoAddError " );
this .studentManage.insertStudent_info(student_info);
}
book.close();
return new ModelAndView( " education/e-studentInfoAddExcelSuccess " ， " row " ， new Integer(row - 1 ));
} catch (Exception e) {
e.printStackTrace();
}
return new ModelAndView( " education/e-studentInfoAddExcelError " );
}
public void setStudentManage(IStudent_infoManage studentManage) {
this .studentManage = studentManage;
}
}
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
Java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"
/
bean id="viewController"/
bean id="urlMapping"
property name="mappings"
props
prop key="/view*.shtml"viewController/prop
/props
/property
/bean
/beans
?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"
/
bean id="viewController"/
bean id="urlMapping"
property name="mappings"
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。
Java代码
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 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。
Java代码
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)));
}
}
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
Java代码
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);
}
}
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
Java代码
?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-namespringPDFTest/display-name
servlet
servlet-namespringPDFTest/servlet-name
servlet-class
org.springframework.web.servlet.DispatcherServlet
/servlet-class
load-on-startup1/load-on-startup
/servlet
servlet-mapping
servlet-namespringPDFTest/servlet-name
url-pattern*.shtml/url-pattern
/servlet-mapping
welcome-file-list
welcome-fileindex.jsp/welcome-file
/welcome-file-list
/web-app
?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-namespringPDFTest/display-name
servlet
servlet-namespringPDFTest/servlet-name
servlet-class
org.springframework.web.servlet.DispatcherServlet
/servlet-class
load-on-startup1/load-on-startup
/servlet
servlet-mapping
servlet-namespringPDFTest/servlet-name
url-pattern*.shtml/url-pattern
/servlet-mapping
welcome-file-list
welcome-fileindex.jsp/welcome-file
/welcome-file-list
/web-app
3)index.jsp
Java代码
%@ 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
网页到Excel打开时乱码解决办法：
问题：
Java代码
a href ="excel/test.xls" 打开 / a 【乱码】
a href ="excel/test.xls" 打开 / a 【乱码】
解决方法：
web.xml里加上 ：
Java代码
mime-mapping
extension xls / extension
mime-type application/vnd.ms-excel / mime-type
/ mime-mapping
mime-mapping
extension xls / extension
mime-type application/vnd.ms-excel / mime-type
/ mime-mapping
让他下载然后直接打开即可
