首页 > 技术文章 > easypoi 导入导出

zq1003 2020-12-31 18:10 原文

这次任务是报表的导入导出,总结一下心得。

 

1 导入依赖  项目原本就有 

2 接下来就是使用,用起来也是很简单。一切查找数据都是按照正常逻辑来写。

  导出:

1 图片

 

/**
     * oe下载
     * @param
     * @param response
     * ExcelExportUtil.exportExcel
     */
    @RequestMapping("OeDecodingExcelExport")
    @ResponseBody
    public Result OeDecodingExcelExport(HttpServletResponse response,String startTime,String endTime,Integer logoCode) throws IOException {
        Result result=new Result();
        response.setContentType("text/html; charset=utf-8");
        //查询数据
        List<OeDecoding> oeDecoding = iOeDecoding.oeCodeExcelExport(startTime,endTime,logoCode);
        if(oeDecoding.size()==0){
            result.setResultCode(new ResultCode(-1,"无数据,请重新选择"));
            return result;
        }
        Workbook workbook = ExcelExportUtil.exportExcel(new ExportParams("oe码解码", "oe码解码", ExcelType.XSSF),
                OeDecoding.class, oeDecoding);
        String fileName = LocalDateTime.now().format(DateTimeFormatter.ofPattern("yyyyMMdd HHmmss"));
        fileName += fileName + "oe码解码";
        fileName = URLEncoder.encode(fileName, "UTF-8");
        response.setContentType("application/vnd.openxmlformats-officedocument.spreadsheetml.sheet");
        response.addHeader("Content-Disposition", "attachment;filename=" + fileName + ".xlsx");
        workbook.write(response.getOutputStream());
        return result;
    }

核心方法:

 Workbook workbook = ExcelExportUtil.exportExcel(new ExportParams("oe码解码", "oe码解码", ExcelType.XSSF),
                OeDecoding.class, oeDecoding);

解释:

第一个参数是title名字,第二个是sheetname名字,ExcelType.XSSF 是固定格式,“OeDecoding.class”,这个是实体类的映射这是主要点。oeDecoding,这个是需要下载的数据,如果只是下载固定模板的话,这个就不要了。

 

2 实体类方法注解

 

 

 

@excel 注解打上就可以实现下载了。还有不同的属性值可以设置,这里可以去看官方文档。

 

 

    导入:

 

 

 

 核心方法:

 

ExcelImportResult<OeDecoding> list = ExcelImportUtil.importExcelMore(file.getInputStream(), OeDecoding.class, params);
ExcelImportUtil,提供了很多方法,可以进源文件看看。这个不需要些,引入依赖就有了。
我摘了源文件:
/**
 * Copyright 2013-2015 JueYue (qrb.jueyue@gmail.com)
 *   
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package cn.afterturn.easypoi.excel;

import java.io.File;
import java.io.FileInputStream;
import java.io.InputStream;
import java.util.List;

import cn.afterturn.easypoi.handler.inter.IReadHandler;
import org.apache.poi.util.IOUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import cn.afterturn.easypoi.excel.entity.ImportParams;
import cn.afterturn.easypoi.excel.entity.result.ExcelImportResult;
import cn.afterturn.easypoi.excel.imports.ExcelImportService;
import cn.afterturn.easypoi.excel.imports.sax.SaxReadExcel;
import cn.afterturn.easypoi.exception.excel.ExcelImportException;

/**
 * Excel 导入工具
 * 
 * @author JueYue
 *  2013-9-24
 * @version 1.0
 */
@SuppressWarnings({ "unchecked" })
public class ExcelImportUtil {

    private ExcelImportUtil() {
    }

    private static final Logger LOGGER = LoggerFactory.getLogger(ExcelImportUtil.class);

    /**
     * Excel 导入 数据源本地文件,不返回校验结果 导入 字 段类型 Integer,Long,Double,Date,String,Boolean
     * 
     * @param file
     * @param pojoClass
     * @param params
     * @return
     */
    public static <T> List<T> importExcel(File file, Class<?> pojoClass, ImportParams params) {
        FileInputStream in = null;
        try {
            in = new FileInputStream(file);
            return new ExcelImportService().importExcelByIs(in, pojoClass, params, false).getList();
        } catch (ExcelImportException e) {
            throw new ExcelImportException(e.getType(), e);
        } catch (Exception e) {
            LOGGER.error(e.getMessage(), e);
            throw new ExcelImportException(e.getMessage(), e);
        } finally {
            IOUtils.closeQuietly(in);
        }
    }

    /**
     * Excel 导入 数据源IO流,不返回校验结果 导入 字段类型 Integer,Long,Double,Date,String,Boolean
     * 
     * @param inputstream
     * @param pojoClass
     * @param params
     * @return
     * @throws Exception
     */
    public static <T> List<T> importExcel(InputStream inputstream, Class<?> pojoClass,
                                          ImportParams params) throws Exception {
        return new ExcelImportService().importExcelByIs(inputstream, pojoClass, params, false).getList();
    }

    /**
     * Excel 导入 数据源IO流 字段类型 Integer,Long,Double,Date,String,Boolean
     * 支持校验,支持Key-Value
     * 
     * @param inputstream
     * @param pojoClass
     * @param params
     * @return
     * @throws Exception
     */
    public static <T> ExcelImportResult<T> importExcelMore(InputStream inputstream,
                                                             Class<?> pojoClass,
                                                             ImportParams params) throws Exception {
        return new ExcelImportService().importExcelByIs(inputstream, pojoClass, params, true);
    }

    /**
     * Excel 导入 数据源本地文件 字段类型 Integer,Long,Double,Date,String,Boolean
     * 支持校验,支持Key-Value
     * @param file
     * @param pojoClass
     * @param params
     * @return
     */
    public static <T> ExcelImportResult<T> importExcelMore(File file, Class<?> pojoClass,
                                                             ImportParams params) {
        FileInputStream in = null;
        try {
            in = new FileInputStream(file);
            return new ExcelImportService().importExcelByIs(in, pojoClass, params, true);
        } catch (ExcelImportException e) {
            throw new ExcelImportException(e.getType(), e);
        } catch (Exception e) {
            LOGGER.error(e.getMessage(), e);
            throw new ExcelImportException(e.getMessage(), e);
        } finally {
            IOUtils.closeQuietly(in);
        }
    }

    /**
     * Excel 通过SAX解析方法,适合大数据导入,不支持图片
     * 导入 数据源本地文件,不返回校验结果 导入 字 段类型 Integer,Long,Double,Date,String,Boolean
     * 
     * @param inputstream
     * @param pojoClass
     * @param params
     * @param handler
     */
    public static void importExcelBySax(InputStream inputstream, Class<?> pojoClass,
                                        ImportParams params, IReadHandler handler) {
        new SaxReadExcel().readExcel(inputstream, pojoClass, params, handler);
    }

}

 

不同的方法对应的参数也不同,请对着自己的需求,选择方法。

总之,方法是很简答的。但是我的需求对上传的数据筛选条件有点多,这里就不放出来了。只是提供一种思路。

 


 

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