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(); 
    } 
  } 
}