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easypoi 快速开发 导出 各种姿势的excel

时间:2017-12-15 18:56:41      阅读:290      评论:0      收藏:0      [点我收藏+]

标签:static   length   private   ring   stack   images   rtu   obj   apach   

应用:

基本可以应付所有变态的Excel导出需求,各种姿势!!

Maven:

<!-- easyPoi -->
<dependency>
  <groupId>cn.afterturn</groupId>
  <artifactId>easypoi-base</artifactId>
  <version>3.0.1</version>
</dependency>
<dependency>
  <groupId>cn.afterturn</groupId>
  <artifactId>easypoi-annotation</artifactId>
  <version>3.0.1</version>
</dependency>
<dependency>
  <groupId>cn.afterturn</groupId>
  <artifactId>easypoi-web</artifactId>
  <version>3.0.1</version>
</dependency>

模板:

技术分享图片

技术分享图片

导出:

// 查询数据,此处省略
List<EasyPOIModel> list = new ArrayList<EasyPOIModel>();
int count1 = 0 ;
EasyPOIModel easyPOIModel11 = new EasyPOIModel(count1++,"信科","张三","男",20) ;
EasyPOIModel easyPOIModel12 = new EasyPOIModel(count1++,"信科","李四","男",17) ;

list.add(easyPOIModel11) ;
list.add(easyPOIModel12) ;

// 获取导出excel指定模版
TemplateExportParams params = new TemplateExportParams();
// 标题开始行
params.setHeadingStartRow(0);
// 标题行数
params.setHeadingRows(2);
// 设置sheetName,若不设置该参数,则使用得原本得sheet名称
params.setSheetName("班级信息");

params.setHeadingRows(2);
params.setHeadingStartRow(2);
params.setTempParams("t");
Map<String,Object> data = new HashMap<String, Object>();
data.put("list", list);

book = ExcelUtil.getWorkbook(params, data, "1easypoiExample.xls");

//下载

ExcelUtil.export(response, workbook, "easypoi-excel.xls");

ExcelUtil:

import org.apache.poi.ss.usermodel.Workbook;
import org.springframework.core.io.Resource;
import org.springframework.core.io.support.PathMatchingResourcePatternResolver;
import org.springframework.core.io.support.ResourcePatternResolver;

import cn.afterturn.easypoi.excel.ExcelExportUtil;
import cn.afterturn.easypoi.excel.entity.TemplateExportParams;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;

import java.io.File;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.OutputStream;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Map;

public class ExcelUtil {

/**
* 模板路径
*/
private static final String TEMPLATE_PATH = "template/";

/**
* 生成excel对象
* @param params 模板导出参数设置
* @param data 模板导出数据
* @param templateName 模板名称
* @return workBook对象
* @throws Exception 异常抛出
*/
public static Workbook getWorkbook(TemplateExportParams params, Map<String, Object> data, String templateName) throws Exception {
  String templatePath = TEMPLATE_PATH + templateName;
  File file = getTemplateFile(templatePath);
  params.setTemplateUrl(file.getAbsolutePath());
  Workbook book = ExcelExportUtil.exportExcel(params, data);
  if(file.exists()) {
  file.delete();
  }
  return book;
}

/**
* 导出excel对象
* @param response httpResponse对象
* @param workbook workBook对象
* @param fileName 导出文件名
* @throws Exception 异常抛出
*/
public static void export(HttpServletResponse response, Workbook workbook, String fileName) throws Exception {
  response.reset();
  response.setContentType("application/x-msdownload");
  fileName = fileName + new SimpleDateFormat("yyyyMMddHHmmss").format(new Date());
  response.setHeader("Content-disposition","attachment; filename="+new String(fileName.getBytes("gb2312"),"ISO-8859-1")+".xls");
  ServletOutputStream outStream=null;
try{
  outStream = response.getOutputStream();
  workbook.write(outStream);
}finally{
  workbook.close();
  outStream.close();
}
}

/**
* 获取模板文件--获取到的文件为临时文件,用完后需要手动删除
* <p>由于springboot打包成jar之后,不能以绝对路径的形式读取模板文件,故此处将模板文件以临时文件的形式写到磁盘中,用完请手动删除</p>
* @param templatePath 模板路径
* @return 模板文件
* @throws Exception 异常抛出
*/
public static File getTemplateFile(String templatePath) throws Exception {
  File file = File.createTempFile("temp", null);
  ResourcePatternResolver resolver = new PathMatchingResourcePatternResolver();
  Resource[] resources = resolver.getResources(templatePath);
  if(resources.length == 1) {
    InputStream inputStream = resources[0].getInputStream();
    inputStreamToFile(inputStream, file);
  }else {
    System.out.println("请检查模板文件是否存在");
  }
  return file;
}

/**
* InputStream 转file
* @param ins 输入流
* @param file 目标文件
*/
public static void inputStreamToFile(InputStream ins,File file) {
try {
  OutputStream os = new FileOutputStream(file);
  int bytesRead = 0;
  byte[] buffer = new byte[8192];
  while ((bytesRead = ins.read(buffer, 0, 8192)) != -1) {
  os.write(buffer, 0, bytesRead);
  }
  os.close();
  ins.close();
} catch (Exception e) {
  e.printStackTrace();
}
}
}

 

easypoi 快速开发 导出 各种姿势的excel

标签:static   length   private   ring   stack   images   rtu   obj   apach   

原文地址:http://www.cnblogs.com/xiexy/p/8044393.html

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