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  • 阿里OSS以及POI之excel上传

    OSS是一个存储库,可以把文件存储在这里。

    POI是,则是阿帕奇提供的一个可以操作mirco office文件的一个API。用于excel 、等文件处理。

    03版的后缀是xls,  HSSF 最大支持65536行

    07版以后则是 .xlsx,XSSF行数没有限制,但容易内存溢出。推荐使用SXSSF,速度快,内存小

        <dependencies>
            <dependency>
                <groupId>com.aliyun.oss</groupId>
                <artifactId>aliyun-sdk-oss</artifactId>
                <version>3.8.0</version>
            </dependency>
            <dependency>
                <groupId>junit</groupId>
                <artifactId>junit</artifactId>
                <version>4.12</version>
            </dependency>
            <!--xls-->
            <dependency>
                <groupId>org.apache.poi</groupId>
                <artifactId>poi</artifactId>
                <version>3.9</version>
            </dependency>
            <!--xlsx-->
            <dependency>
                <groupId>org.apache.poi</groupId>
                <artifactId>poi-ooxml</artifactId>
                <version>3.9</version>
            </dependency>
        </dependencies>
    
    =========================
    package com.xgz.oss;
    
    import org.apache.poi.hssf.usermodel.HSSFWorkbook;
    import org.apache.poi.ss.usermodel.Cell;
    import org.apache.poi.ss.usermodel.Row;
    import org.apache.poi.ss.usermodel.Sheet;
    import org.apache.poi.ss.usermodel.Workbook;
    import org.apache.poi.xssf.usermodel.*;
    import org.junit.Test;
    
    import java.io.*;
    
    public class TestPoi {
    
        //测试poi操作excel,往excel中写内容
        @Test
        public void tespoi() throws IOException {
    
            //1创建workbook,xls和xlsx  new的对象不同。xlsx new的是XSSFWorkbook,xls new的是HSSFWorkbook
            Workbook workbook = new XSSFWorkbook();
    
            //2根据work创建sheet
            Sheet sheet = workbook.createSheet("会员列表");
    
            //3根据sheet行rows
            Row row = sheet.createRow(0);
    
            //4根据行创建列cell
            Cell cell = row.createCell(0);
    
            //5向cell里面设置值
            cell.setCellValue("lucy");
    
            //6使用输出流写入到文件中
            OutputStream  outputStream = new FileOutputStream("C:\excelztest\lucyxx.xlsx");
    
            //7把workbook内容通过输出流写如文件中
            workbook.write(outputStream);
    //8关闭输入流 outputStream.close(); } //测试poi操作excel,读excel中内容名 @Test public void testread() throws IOException { // 1 获取读取文件的输入流 FileInputStream fileInputStream = new FileInputStream("C:\excelztest\lucyxx.xlsx"); //2创建workbook,需要把输入流传递进去 XSSFWorkbook xssfWorkbook = new XSSFWorkbook(fileInputStream); //3根据workbook获取sheet XSSFSheet sheetAt = xssfWorkbook.getSheetAt(0); //4根据sheet获取rows XSSFRow row = sheetAt.getRow(0); //5根据rows获取cells XSSFCell cell = row.getCell(0); //第一行第二列的值 XSSFCell cell2 = row.getCell(1); double numericCellValue = cell2.getNumericCellValue(); System.out.println(numericCellValue); //6根据cell获取里面的值 String stringCellValue = cell.getStringCellValue(); //7打印读到的值 System.out.println(stringCellValue); //8关闭输入流 fileInputStream.close(); } }
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  • 原文地址:https://www.cnblogs.com/xgzzzy16/p/13195886.html
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