1.项目组负责人让我实现这个接口，因为以前做过类似的，中间并没有遇到什么太困难的事情。其他不说，先上代码：
package com.tydic.eshop.action.feedback; import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.List; import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;
import org.apache.struts2.ServletActionContext; import com.tydic.eshop.dto.feedback.vo.FeedBackVO;
import com.tydic.eshop.model.feedback.FeedBack;
import com.tydic.eshop.service.feedback.FeedBackService;
import com.tydic.eshop.util.feedback.ExportExcelUtils;
import com.tydic.framework.base.dataobject.Pagination;
import com.tydic.framework.base.dataobject.ResultDto;
import com.tydic.framework.base.exception.ServiceException;
import com.tydic.framework.base.web.struts.BaseSupportAction; /**
* @ClassName: FeedBackAction
* @Description: ECP后台增加意见日志导出功能
* @author liuren
* @date 2016年3月25日
*
*/
public class FeedBackAction extends BaseSupportAction{ private static final long serialVersionUID = 5684835836631112914L;
@Resource(name = "feedBackService")
private FeedBackService feedbackService; private FeedBack feedback;
private FeedBackVO feedbackVO; private List<FeedBack> feedbackList; private String feedbackId; private ResultDto<FeedBack> feedbackPage; private InputStream excelStream; //输出流变量
private String excelFileName; //下载文件名
/**
* 总页数
*/
private int totalPage;
private FileInputStream stream; public String execute() throws Exception {
//这里可加入权限控制
return "downloadsuccess";
}
/**
* 意见反馈查询
* @return
* @throws Exception
*/
public String queryFeedBackList() throws ServiceException{
if(feedbackVO == null){
feedbackVO = new FeedBackVO();
}
HttpServletRequest request = ServletActionContext.getRequest();
String currentPage = request.getParameter("index");
int currentPagei=0;
if(currentPage!=null){
currentPagei = Integer.parseInt(currentPage);
}
Pagination pagination = new Pagination(currentPagei);
String pagesize = request.getParameter("pageSize");
if(pagesize==null){
pagesize="10";
}
pagination.setPageSize(Integer.parseInt(pagesize)); feedbackVO.setPagination(pagination);
try {
feedbackPage = feedbackService.findFeedBackPage(feedbackVO);
totalPage = feedbackPage.getPagination().getTotalPage();
} catch (Exception e) {
throw new ServiceException("数据分页查询失败"+e.getMessage());
}
return "toFeedBackListPage";
} /**
* @throws IOException
* @throws
* @Title: exportExecl
* @Description: 报表导出并下载
* @param @return
* @param @throws ServiceException 参数
* @return String 返回类型
* @throws
*/
public String exportExecl() throws ServiceException, IOException{
ExportExcelUtils<FeedBack> ex = new ExportExcelUtils<FeedBack>();
Date fileDate = new Date();
System.out.println(fileDate);
SimpleDateFormat sdf=new SimpleDateFormat("yyyyMMddHHmmss");
String ds = sdf.format(fileDate);
String fileName = "意见反馈报表"+ds+".xls"; //生成的文件名称
System.out.println(fileName);
String exportPath = request.getSession().getServletContext().getRealPath("/WEB-INF/download/"+fileName);
String[] headers = { "序号", "渠道标示", "手机号码", "终端机型", "反馈信息内容", "创建时间", "图片地址", "版本号", "状态" };
if (exportPath==null||exportPath==""||exportPath==" ") {
throw new ServiceException("请选择导出目录");
}
try {
feedbackList = feedbackService.findFeedBackList(feedbackVO);
} catch (Exception e) {
e.printStackTrace();
throw new ServiceException("数据查询失败"+e.getMessage());
} ByteArrayOutputStream out = new ByteArrayOutputStream();
ByteArrayOutputStream os = ex.exportExcel("海航通信意见反馈报表",headers, feedbackList, out,"yyyy/MM/dd HH:mm:ss"); byte[] fileContent = os.toByteArray();
ByteArrayInputStream is = new ByteArrayInputStream(fileContent); excelStream = is; //文件流
excelFileName = new String(fileName.getBytes(), "ISO8859-1"); //设置下载的文件名
System.out.println(excelFileName); return "successdownload";
}
/**
* @Title: queryFeedBackById
* @Description: 根据意见反馈Id查询意见反馈详情
* @param @return
* @param @throws ServiceException 参数
* @return String 返回类型
* @throws
*/
public String queryFeedBackById() throws ServiceException{
feedback = feedbackService.queryFeedBackById(feedbackId);
return "toFeedBackDetailPage";
} public FeedBackVO getFeedbackVO() {
return feedbackVO;
}
public void setFeedbackVO(FeedBackVO feedbackVO) {
this.feedbackVO = feedbackVO;
}
public List<FeedBack> getFeedbackList() {
return feedbackList;
}
public void setFeedbackList(List<FeedBack> feedbackList) {
this.feedbackList = feedbackList;
}
public String getFeedbackId() {
return feedbackId;
}
public void setFeedbackId(String feedbackId) {
this.feedbackId = feedbackId;
} public ResultDto<FeedBack> getFeedbackPage() {
return feedbackPage;
}
public void setFeedbackPage(ResultDto<FeedBack> feedbackPage) {
this.feedbackPage = feedbackPage;
}
public int getTotalPage() {
return totalPage;
}
public void setTotalPage(int totalPage) {
this.totalPage = totalPage;
}
public FeedBack getFeedback() {
return feedback;
}
public void setFeedback(FeedBack feedback) {
this.feedback = feedback;
}
public InputStream getExcelStream() {
return excelStream;
}
public void setExcelStream(InputStream excelStream) {
this.excelStream = excelStream;
}
public String getExcelFileName() {
return excelFileName;
}
public void setExcelFileName(String excelFileName) {
this.excelFileName = excelFileName;
}
public FileInputStream getStream() {
return stream;
}
public void setStream(FileInputStream stream) {
this.stream = stream;
} }
FeedBackAction
2.然后是struts的配置文件 struts.xml中action的配置
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
"http://struts.apache.org/dtds/struts-2.0.dtd"> <struts>
<package name="feedback" extends="default" namespace="/feedback"> <action name="feedBackAction" class="feedBackAction" method="initFeedBack">
<result name="success" type="redirect">feedBackAction!queryFeedBackList.do</result>
<result name="toFeedBackDetailPage">/jsp/feedback/feedBackDetail.jsp</result>
<result name="toFeedBackListPage">/jsp/feedback/feedBackList.jsp</result>
<result name="successdownload" type="stream">
<!-- 下载文件的类型，如果你不知道是什么格式，可以去 tomcat\conf\web.xml下找 -->
<param name="contentType">application/vnd.ms-excel</param>
<!-- 返回流 excelStream为action中的流变量名称 -->
<param name="inputName">excelStream</param>
<!-- attachment 这个位置的参数挺特殊的，可以设置成下载时，是否出现个下载提示框，或者直接下载之类的。
fileName指定生成的文件名字(适合动态生成文件名，比如做报表时，一般都要说是几月的统计数据之类)为action中变量-->
<param name="contentDisposition">
attachment;filename=${excelFileName}
</param>
<param name="bufferSize">1024</param>
</result>
</action>
</package> </struts>
struts.xml
3.然后是导出报表的工具类
package com.tydic.eshop.util.feedback; import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.lang.reflect.Field;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.text.SimpleDateFormat;
import java.util.Collection;
import java.util.Date;
import java.util.Iterator;
import java.util.regex.Matcher;
import java.util.regex.Pattern; import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFCellStyle;
import org.apache.poi.hssf.usermodel.HSSFClientAnchor;
import org.apache.poi.hssf.usermodel.HSSFComment;
import org.apache.poi.hssf.usermodel.HSSFFont;
import org.apache.poi.hssf.usermodel.HSSFPatriarch;
import org.apache.poi.hssf.usermodel.HSSFRichTextString;
import org.apache.poi.hssf.usermodel.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.hssf.util.HSSFColor; /**
* @ClassName: ExportExcel
* @Description: 利用开源组件POI3.0.2动态导出EXCEL文档 转载时请保留以下信息，注明出处！
* @author liuren
* @date 2016年3月28日
*
* @param <T>
* 应用泛型，代表任意一个符合javabean风格的类
* 注意这里为了简单起见，boolean型的属性xxx的get器方式为getXxx(),而不是isXxx()
* byte[]表jpg格式的图片数据
*/
public class ExportExcelUtils<T> { public void exportExcel(Collection<T> dataset, ByteArrayOutputStream out) {
this.exportExcel("意见反馈报表", null, dataset, out, "yyyy-MM-dd");
} public void exportExcel(String[] headers, Collection<T> dataset, ByteArrayOutputStream out) {
this.exportExcel("意见反馈报表", headers, dataset, out, "yyyy-MM-dd");
} public void exportExcel(String[] headers, Collection<T> dataset, ByteArrayOutputStream out, String pattern) {
this.exportExcel("意见反馈报表", headers, dataset, out, pattern);
}
/**
* 这是一个通用的方法，利用了JAVA的反射机制，可以将放置在JAVA集合中并且符号一定条件的数据以EXCEL 的形式输出到指定IO设备上
*
* @param title
* 表格标题名
* @param headers
* 表格属性列名数组
* @param dataset
* 需要显示的数据集合,集合中一定要放置符合javabean风格的类的对象。此方法支持的
* javabean属性的数据类型有基本数据类型及String,Date,byte[](图片数据)
* @param out
* 与输出设备关联的流对象，可以将EXCEL文档导出到本地文件或者网络中
* @param pattern
* 如果有时间数据，设定输出格式。默认为"yyy-MM-dd"
*/
public ByteArrayOutputStream exportExcel(String title, String[] headers, Collection<T> dataset, ByteArrayOutputStream out, String pattern) {
// 声明一个工作薄
HSSFWorkbook workbook = new HSSFWorkbook();
// 生成一个表格
HSSFSheet sheet = workbook.createSheet(title);
// 设置表格默认列宽度为15个字节
sheet.setDefaultColumnWidth(15);
// 生成一个样式
HSSFCellStyle style = workbook.createCellStyle();
// 设置这些样式
style.setFillForegroundColor(HSSFColor.SKY_BLUE.index);
style.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);
style.setBorderBottom(HSSFCellStyle.BORDER_THIN);
style.setBorderLeft(HSSFCellStyle.BORDER_THIN);
style.setBorderRight(HSSFCellStyle.BORDER_THIN);
style.setBorderTop(HSSFCellStyle.BORDER_THIN);
style.setAlignment(HSSFCellStyle.ALIGN_CENTER);
// 生成一个字体
HSSFFont font = workbook.createFont();
font.setColor(HSSFColor.VIOLET.index);
font.setFontHeightInPoints((short) 12);
font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);
// 把字体应用到当前的样式
style.setFont(font);
// 生成并设置另一个样式
HSSFCellStyle style2 = workbook.createCellStyle();
style2.setFillForegroundColor(HSSFColor.LIGHT_YELLOW.index);
style2.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);
style2.setBorderBottom(HSSFCellStyle.BORDER_THIN);
style2.setBorderLeft(HSSFCellStyle.BORDER_THIN);
style2.setBorderRight(HSSFCellStyle.BORDER_THIN);
style2.setBorderTop(HSSFCellStyle.BORDER_THIN);
style2.setAlignment(HSSFCellStyle.ALIGN_CENTER);
style2.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);
// 生成另一个字体
HSSFFont font2 = workbook.createFont();
font2.setBoldweight(HSSFFont.BOLDWEIGHT_NORMAL);
// 把字体应用到当前的样式
style2.setFont(font2); // 声明一个画图的*管理器
HSSFPatriarch patriarch = sheet.createDrawingPatriarch();
// 定义注释的大小和位置,详见文档
HSSFComment comment = patriarch.createComment(new HSSFClientAnchor(0, 0, 0, 0, (short) 4, 2, (short) 6, 5));
// 设置注释内容
// comment.setString(new HSSFRichTextString("可以在POI中添加注释！"));
// 设置注释作者，当鼠标移动到单元格上是可以在状态栏中看到该内容.
comment.setAuthor("海航通信"); // 产生表格标题行
HSSFRow row = sheet.createRow(0);
for (int i = 0; i < headers.length; i++) {
HSSFCell cell = row.createCell(i);
cell.setCellStyle(style);
HSSFRichTextString text = new HSSFRichTextString(headers[i]);
cell.setCellValue(text);
} // 遍历集合数据，产生数据行
Iterator<T> it = dataset.iterator();
int index = 0;
while (it.hasNext()) {
index++;
row = sheet.createRow(index);
T t = (T) it.next();
// 利用反射，根据javabean属性的先后顺序，动态调用getXxx()方法得到属性值
Field[] fields = t.getClass().getDeclaredFields();
for (int i = 0; i < fields.length; i++) {
HSSFCell cell = row.createCell(i);
cell.setCellStyle(style2);
Field field = fields[i];
String fieldName = field.getName();
String getMethodName = "get" + fieldName.substring(0, 1).toUpperCase() + fieldName.substring(1);
try {
Class tCls = t.getClass();
Method getMethod = tCls.getMethod(getMethodName, new Class[] {});
Object value = getMethod.invoke(t, new Object[] {});
// 判断值的类型后进行强制类型转换
String textValue = null;
if (value==null) {
value="";
}
if (value instanceof Boolean) {
boolean bValue = (Boolean) value;
textValue = "男";
if (!bValue) {
textValue = "女";
}
} else if (value instanceof Date) {
Date date = (Date) value;
SimpleDateFormat sdf = new SimpleDateFormat(pattern);
textValue = sdf.format(date);
} else if (value instanceof byte[]) {
// 有图片时，设置行高为60px;
row.setHeightInPoints(60);
// 设置图片所在列宽度为80px,注意这里单位的一个换算
sheet.setColumnWidth(i, (short) (35.7 * 80));
// sheet.autoSizeColumn(i);
byte[] bsValue = (byte[]) value;
HSSFClientAnchor anchor = new HSSFClientAnchor(0, 0, 1023, 255, (short) 6, index, (short) 6,
index);
anchor.setAnchorType(2);
patriarch.createPicture(anchor, workbook.addPicture(bsValue, HSSFWorkbook.PICTURE_TYPE_JPEG));
} else {
// 其它数据类型都当作字符串简单处理
textValue = value.toString();
}
// 如果不是图片数据，就利用正则表达式判断textValue是否全部由数字组成
if (textValue != null) {
Pattern p = Pattern.compile("^\\d+(\\.\\d+)?$");
Matcher matcher = p.matcher(textValue);
if (matcher.matches()) {
// 是数字当作double处理
cell.setCellValue(Double.parseDouble(textValue));
} else {
HSSFRichTextString richString = new HSSFRichTextString(textValue);
HSSFFont font3 = workbook.createFont();
font3.setColor(HSSFColor.BLUE.index);
richString.applyFont(font3);
cell.setCellValue(richString);
}
}
} catch (SecurityException e) {
e.printStackTrace();
} catch (NoSuchMethodException e) {
e.printStackTrace();
} catch (IllegalArgumentException e) {
e.printStackTrace();
} catch (IllegalAccessException e) {
e.printStackTrace();
} catch (InvocationTargetException e) {
e.printStackTrace();
} finally {
// 清理资源
}
} }
try {
workbook.write(out);
} catch (IOException e) {
e.printStackTrace();
}
return out;
}
}
ExportExcelUtils
4.然后是需要导入的poi架包，本人是用Maven做的项目，导入POI的包，只需要导入下面这一个包就行了。
<!-- 导入poi包 -->
<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi-ooxml</artifactId>
<version>3.9</version>
</dependency>
pom.xml
5.然后就是效果图两张
导出的excel的内容：