easypoi 快速开发 导出 各种姿势的excel
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：
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();
}
}
}