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java实现的导出Excel工具类实例

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本文实例讲述了java实现的导出Excel工具类。分享给大家供大家参考,具体如下:

ExcelExportUtil:

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package com.excel;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;
import java.util.regex.Pattern;
import jxl.Workbook;
import jxl.write.Label;
import jxl.write.Number;
import jxl.write.NumberFormat;
import jxl.write.WritableCellFormat;
import jxl.write.WritableSheet;
import jxl.write.WritableWorkbook;
import jxl.write.WriteException;
import jxl.write.biff.RowsExceededException;
/**
  * 生成excel表格
  *
  * @author
  *
  */
public class ExcelExportUtil {
   /**
    * 构造器
    *
    */
   public ExcelExportUtil() {
   }
   /**
    * 生成具有一定格式excel
    *
    * @param sheetName
    *      sheet名称,默认为sheet1
    * @param nf
    *      数字类型的格式 如:jxl.write.NumberFormat nf = new
    *      jxl.write.NumberFormat("#.##");默认无格式
    * @param content
    *      二维数组,要生成excel的数据来源
    * @param 合并项
    *      每一项的数据格式为0,1,0,2 即:把(0,1)和(0,2)合并--->第1列的第1、二个元素合并
    * @param os
    *      excel输出流
    * @param row
    *      需要水平居中的行,默认居左。以逗号分隔的字符串
    * @param col
    *      需要水平居中的列,默认居左。以逗号分隔的字符串
    */
   public void export(String sheetName, NumberFormat nf, String[][] content,
       String[] mergeInfo, OutputStream os, String row, String col) {
     if (VerifyUtil.isNullObject(content, os) || VerifyUtil.isNull2DArray(content)) {
       return ;
     }
     // 默认名称
     if (VerifyUtil.isNullObject(sheetName)) {
       sheetName = "sheet1" ;
     }
     Set<Integer> rows = this .getInfo(row);
     Set<Integer> cols = this .getInfo(col);
     WritableWorkbook workbook = null ;
     try {
       workbook = Workbook.createWorkbook(os);
       WritableSheet sheet = workbook.createSheet(sheetName, 0 );
       for ( int i = 0 ; i < content.length; i++) {
         for ( int j = 0 ; j < content[i].length; j++) {
           if (content[i][j] == null ) {
             content[i][j] = "" ;
           }
           if (isNumber(content[i][j]) && !rows.contains(i)
               && !cols.contains(j)) { // 处理数字
             Number number = null ;
             if (VerifyUtil.isNullObject(nf)) { // 数字无格式
               number = new Number(j, i,
                   Double.valueOf(content[i][j]));
             } else { // 如果有格式,按格式生成
               jxl.write.WritableCellFormat wcfn = new jxl.write.WritableCellFormat(
                   nf);
               number = new Number(j, i,
                   Double.valueOf(content[i][j]), wcfn);
             }
             sheet.addCell(number);
           } else { // 处理非数字
             WritableCellFormat format = new WritableCellFormat();
             if (rows.contains(i) || cols.contains(j)) {
               format.setAlignment(jxl.format.Alignment.CENTRE);
             } else {
               format.setAlignment(jxl.format.Alignment.LEFT);
             }
             format.setVerticalAlignment(jxl.format.VerticalAlignment.CENTRE);
             Label label = new Label(j, i, content[i][j], format);
             sheet.addCell(label);
           }
         }
       }
       this .merge(sheet, mergeInfo);
       workbook.write();
     } catch (Exception e) {
       e.printStackTrace();
     } finally {
       try {
         workbook.close();
         os.close();
       } catch (WriteException e) {
         // TODO Auto-generated catch block
         e.printStackTrace();
       } catch (IOException e) {
         // TODO Auto-generated catch block
         e.printStackTrace();
       }
     }
   }
   /**
    * 生成固定格式的excel,表格都为文本,水平居左,垂直居中
    *
    * @param sheetName
    *      sheet名称,默认为sheet1
    * @param content
    *      二维数组,要生成excel的数据来源
    * @param os
    *      excel输出流
    */
   public void exportFormatExcel(String[][] content, String sheetName,
       OutputStream os) {
     if (VerifyUtil.isNullObject(content, os) || VerifyUtil.isNull2DArray(content)) {
       return ;
     }
     // 默认名称
     if (VerifyUtil.isNullObject(sheetName)) {
       sheetName = "sheet1" ;
     }
     WritableWorkbook workbook = null ;
     try {
       workbook = Workbook.createWorkbook(os);
       WritableSheet sheet = workbook.createSheet(sheetName, 0 );
       for ( int i = 0 ; i < content.length; i++) {
         for ( int j = 0 ; j < content[i].length; j++) {
           if (content[i][j] == null ) {
             content[i][j] = "" ;
           }
           WritableCellFormat format = new WritableCellFormat();
           format.setAlignment(jxl.format.Alignment.LEFT);
           format.setVerticalAlignment(jxl.format.VerticalAlignment.CENTRE);
           Label label = new Label(j, i, content[i][j], format);
           sheet.addCell(label);
         }
       }
       workbook.write();
     } catch (Exception e) {
       e.printStackTrace();
     } finally {
       try {
         workbook.close();
       } catch (WriteException e) {
         // TODO Auto-generated catch block
         e.printStackTrace();
       } catch (IOException e) {
         // TODO Auto-generated catch block
         e.printStackTrace();
       }
     }
   }
   /**
    * 生成固定格式的excel,表格都为文本,水平居左,垂直居中
    *
    * @param sheetName
    *      sheet名称,默认为sheet1
    * @param content
    *      Map,要生成excel的数据来源
    * @param os
    *      excel输出流
    */
   public void exportFormatExcel(Map<String, String[][]> content,
       String[] salary_name_array, String sheetName, OutputStream os)
        {
     if (VerifyUtil.isNullObject(content, os) || content.size() == 0 ) {
       return ;
     }
     // 默认名称
     if (VerifyUtil.isNullObject(sheetName)) {
       sheetName = "sheet1" ;
     }
     WritableWorkbook workbook = null ;
     try {
       workbook = Workbook.createWorkbook(os);
       WritableSheet sheet = workbook.createSheet(sheetName, 0 );
       int index = 0 ;
       for ( int k = 0 ; k < salary_name_array.length; k++) {
         String[][] value = (String[][]) content
             .get(salary_name_array[k]);
         if (value != null && value.length > 0 ) {
           if (index != 0 ) {
             index++;
           }
           WritableCellFormat format1 = new WritableCellFormat();
           format1.setAlignment(jxl.format.Alignment.LEFT);
           format1.setVerticalAlignment(jxl.format.VerticalAlignment.CENTRE);
           Label label1 = new Label( 0 , index, salary_name_array[k],
               format1);
           sheet.addCell(label1);
           for ( int i = 0 ; i < value.length; i++) {
             index++;
             for ( int j = 0 ; j < value[i].length; j++) {
               if (value[i][j] == null ) {
                 value[i][j] = "" ;
               }
               WritableCellFormat format = new WritableCellFormat();
               format.setAlignment(jxl.format.Alignment.LEFT);
               format.setVerticalAlignment(jxl.format.VerticalAlignment.CENTRE);
               Label label = new Label(j, index, value[i][j],
                   format);
               sheet.addCell(label);
             }
           }
         }
       }
       workbook.write();
     } catch (Exception e) {
       e.printStackTrace();
     } finally {
       try {
         workbook.close();
       } catch (WriteException e) {
         // TODO Auto-generated catch block
         e.printStackTrace();
       } catch (IOException e) {
         // TODO Auto-generated catch block
         e.printStackTrace();
       }
     }
   }
   /**
    * 合并表格
    * @param sheet
    *      工作表
    * @param mergeInfo
    *      要合并的表格的信息
    * @throws RowsExceededException
    * @throws NumberFormatException
    * @throws WriteException
    */
   private void merge(WritableSheet sheet, String[] mergeInfo)
       throws RowsExceededException, NumberFormatException, WriteException {
     if (VerifyUtil.isNullObject(sheet) || VerifyUtil.isNull1DArray(mergeInfo)) {
       return ;
     } else if (! this .isMergeInfo(mergeInfo)) {
       return ;
     } else {
       for (String str : mergeInfo) {
         String[] temp = str.split( "," );
         sheet.mergeCells(Integer.parseInt(temp[ 1 ]),
             Integer.parseInt(temp[ 0 ]), Integer.parseInt(temp[ 3 ]),
             Integer.parseInt(temp[ 2 ]));
       }
     }
   }
   /**
    * 处理要居中的行或列的数据
    *
    * @param indexes
    *      行标或列标
    * @return 行坐标或列坐标组成的集合
    */
   private Set<Integer> getInfo(String indexes) {
     Set<Integer> set = new HashSet<Integer>();
     if (VerifyUtil.isNullObject(indexes)) {
       return set;
     }
     String[] temp = indexes.split( "," , 0 );
     for (String str : temp) {
       if (isNumeric(str)) {
         set.add(Integer.parseInt(str));
       }
     }
     return set;
   }
   /**
    * 判断字符串是否由纯数字组成
    *
    * @param str
    *      源字符串
    * @return true是,false否
    */
   private boolean isNumeric(String str) {
     if (VerifyUtil.isNullObject(str)) {
       return false ;
     }
     Pattern pattern = Pattern.compile( "[0-9]*" );
     return pattern.matcher(str).matches();
   }
   /**
    * 判断字符串是否是数字
    *
    * @param str
    *      源字符串
    * @return true是,false否
    */
   private boolean isNumber(String number) {
     // 判断参数
     if (VerifyUtil.isNullObject(number)) {
       return false ;
     }
     // 查看是否有小数点
     int index = number.indexOf( "." );
     if (index < 0 ) {
       return isNumeric(number);
     } else {
       // 如果有多个".",则不是数字
       if (number.indexOf( "." ) != number.lastIndexOf( "." )) {
         return false ;
       }
       String num1 = number.substring( 0 , index);
       String num2 = number.substring(index + 1 );
       return isNumeric(num1) && isNumeric(num2);
     }
   }
   /**
    * 判断合并项内容是否合法
    *
    * @param mergeInfo
    *      合并项 每一项的数据格式为0,1,0,2即把(0,1)和(0,2)合并
    * @return true合法,false非法
    */
   private boolean isMergeInfo(String[] mergeInfo) {
     if (VerifyUtil.isNull1DArray(mergeInfo)) {
       return false ;
     } else {
       for (String str : mergeInfo) {
         String[] temp = str.split( "," );
         if (VerifyUtil.isNull1DArray(temp) || temp.length != 4 ) {
           return false ;
         } else {
           for (String s : temp) {
             if (!isNumeric(s)) {
               return false ;
             }
           }
         }
       }
     }
     return true ;
   }
   public static void main(String[] args) {
     ExcelExportUtil ee = new ExcelExportUtil();
     String[][] content = new String[][] { { "" , "第一列" , null , "第三列" },
         { "第一行" , "aa" , "2.00" , "22" }, { "第二行" , "bb" , "3.01" , "32" },
         { "第三行" , "cc" , "4.00" , "41" } };
     try {
       OutputStream os = new FileOutputStream( "D:/test2.xls" );
       // ee.export(null,null, content,null, os);
       ee.export( null , null , content,
           new String[] { "0,1,0,2" , "1,0,3,0" }, os, "0,1" , "0" );
     } catch (Exception e) {
       // TODO Auto-generated catch block
       e.printStackTrace();
     }
   }
}

VerifyUtil:

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package com.excel;
import java.io.OutputStream;
import java.util.Map;
import jxl.write.NumberFormat;
import jxl.write.WritableSheet;
public class VerifyUtil {
   public static boolean isNullObject( String [][] content, OutputStream os) {
     // TODO Auto-generated method stub
     if (content != null && content.length > 0 && os != null )
     {
       return false ;
     }
     return true ;
   }
   public static boolean isNull2DArray( String [][] content) {
     // TODO Auto-generated method stub
     if (content != null && content.length > 0 )
     {
       return false ;
     }
     return true ;
   }
   public static boolean isNullObject(NumberFormat nf) {
     // TODO Auto-generated method stub
     if (nf != null )
     {
       return false ;
     }
     return true ;
   }
   public static boolean isNullObject( String sheetName) {
     if (sheetName != null && ! "" .equals(sheetName.trim()))
     {
       return false ;
     }
     return true ;
   }
   public static boolean isNullObject(Map< String , String [][]> content,
       OutputStream os) {
     // TODO Auto-generated method stub
     if (content != null && content.size() > 0 && os != null )
     {
       return false ;
     }
     return true ;
   }
   public static boolean isNull1DArray( String [] mergeInfo) {
     // TODO Auto-generated method stub
     if (mergeInfo != null && mergeInfo.length > 0 )
     {
       return false ;
     }
     return true ;
   }
   public static boolean isNullObject(WritableSheet sheet) {
     // TODO Auto-generated method stub
     if (sheet != null )
     {
       return false ;
     }
     return true ;
   }
}

希望本文所述对大家java程序设计有所帮助.

原文链接:http://www.cnblogs.com/FCWORLD/p/3411851.html 。

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