Java使用poi操作excel实例解析

<project xmlns="http://maven.apache.org/POM/4.0.0"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0http://maven.apache.org/maven-v4_0_0.xsd">  <modelVersion>4.0.0</modelVersion>  <groupId>excelDemo1</groupId>  <artifactId>excelDemo1</artifactId>  <packaging>war</packaging>  <version>0.0.1-SNAPSHOT</version>  <name>excelDemo1 Maven Webapp</name>  <url>http://maven.apache.org</url>  <dependencies>   <dependency>    <groupId>junit</groupId>    <artifactId>junit</artifactId>    <version>3.8.1</version>    <scope>test</scope>   </dependency>   <dependency>   <groupId>org.apache.poi</groupId>   <artifactId>poi</artifactId>   <version>3.8</version>   </dependency>  </dependencies>  <build>   <finalName>excelDemo1</finalName>  </build> </project>

package excelDemo1;   import java.io.File; import java.io.FileOutputStream; import java.io.OutputStream; import org.apache.poi.hssf.usermodel.HSSFRow; import org.apache.poi.hssf.usermodel.HSSFSheet; import org.apache.poi.hssf.usermodel.HSSFWorkbook;   public class ExcelDemo0 {   /**    * java生成excel文件并写入磁盘    *    * @author：tuzongxun    * @Title: main    * @param@param args    * @return void    * @date Apr 28,2016 7:32:52 PM    * @throws    */   public static void main(String[] args) {     //C:/Users/tuzongxun123/Desktop桌面，windows和linux的斜杠不一样，而且java对于“/”需要转义处理，File.separator可以实现跨平台     File file = new File("C:" + File.separator + "Users" + File.separator        + "tuzongxun123" + File.separator + "Desktop" + File.separator        + "ioFile" + File.separator + "user.xls");     try {       OutputStream outputStream = new FileOutputStream(file);       // 创建excel文件，注意这里的hssf是excel2007及以前版本可用，2007版以后的不可用，要用xssf       HSSFWorkbook workbook = new HSSFWorkbook();       // 创建excel工作表       HSSFSheet sheet = workbook.createSheet("user");       // 为工作表增加一行       HSSFRow row = sheet.createRow(0);       // 在指定的行上增加两个单元格       row.createCell(0).setCellValue("name");       row.createCell(1).setCellValue("password");       // 调用输出流把excel文件写入到磁盘       workbook.write(outputStream);       // 关闭输出流       outputStream.close();     } catch (Exception e) {       e.printStackTrace();     }   } } 

package excelDemo1;   import java.io.BufferedInputStream; import java.io.File; import java.io.FileInputStream; 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.poifs.filesystem.POIFSFileSystem;   /**  * 读取excel文件  *  * @author tuzongxun123  *  */ public class ExcelDemo2 {   public static void main(String[] agrs) {     try {       // 获取excel文件输入流       FileInputStream fileInputStream = new FileInputStream("C:"          + File.separator + "Users" + File.separator          + "tuzongxun123" + File.separator + "Desktop"          + File.separator + "ioFile" + File.separator + "user.xls");       BufferedInputStream bufferedInputStream = newBufferedInputStream(          fileInputStream);       POIFSFileSystem fileSystem = new POIFSFileSystem(          bufferedInputStream);       // 获取excel文件       HSSFWorkbook hssfWorkbook = new HSSFWorkbook(fileSystem);       // 根据名称获取指定的excel工作薄       HSSFSheet sheet = hssfWorkbook.getSheet("user");       // 这里实际上可以用sheet.rowIterator()来遍历       for (int i = 1;; i++) {        HSSFRow row = sheet.getRow(i);        if (row != null) {          String nameString1 = row.getCell(0).getStringCellValue();          String password = row.getCell(i).getStringCellValue();          System.out.println("name:" + nameString1);          System.out.println("password:" + password);          bufferedInputStream.close();        } else {          bufferedInputStream.close();          return;        }       }       } catch (Exception e) {       e.printStackTrace();     }   } }