JExcel - 学习总结（1）

1、什么是JExcel

JExcel是Java对Excel进行操作的包，可以实现创建一个Excel并写入或读取Excel的数据等操作；

JExcel的主要类为：

(1)Workbook：工作簿

(2)WritableWorkbook：可写工作簿

(3)Sheet：表单；

(4)WritableSheet：可写表单;

(5)Label：单元格；

Maven依赖引入：

<dependency>
      <groupId>net.sourceforge.jexcelapi</groupId>
      <artifactId>jxl</artifactId>
      <version>2.6.12</version>
</dependency>

项目结构：

2、Java输出Excel

public static String createSheet() throws IOException, RowsExceededException, WriteException {

        String str[][] = {{"姓名","编号"},{"终结者","54321"}};
        File f = new File("test.xls");
        WritableWorkbook workbook = Workbook.createWorkbook(f);
        WritableSheet sheet = workbook.createSheet("sheet1", 0);
        Label lab = null;
        for(int i=0;i<str.length;i++){
            for(int j=0;j<str[i].length;j++){
                lab = new Label(j,i,str[i][j]); //Label(col,row,str);
                sheet.addCell(lab);
            }
        }
        workbook.write();
        workbook.close();
        return "1";
    }

3、Java读取Excel

public static String readSheet() throws BiffException, IOException {

        Workbook workbook = Workbook.getWorkbook(new File("test.xls"));
        Sheet sheet[] = workbook.getSheets();
        String lab = null;
        for(int a=0;a<sheet.length;a++){
            for(int i=0;i<sheet[a].getRows();i++){
                for(int j=0;j<sheet[a].getColumns();j++){
                    lab = sheet[a].getCell(j,i).getContents();
                    System.out.print(lab+"、");
                }
                System.out.println();
            }
        }
        return "1";
    }

4、运行测试

AppTest.java

package com.lfy.cn.JexcelapiTest;

import java.io.IOException;

import junit.framework.Test;
import junit.framework.TestCase;
import junit.framework.TestSuite;
import jxl.read.biff.BiffException;
import jxl.write.WriteException;
import jxl.write.biff.RowsExceededException;

/**
 * Unit test for simple App.
 */
public class AppTest
    extends TestCase
{
    /**
     * Create the test case
     *
     * @param testName name of the test case
     */
    public AppTest( String testName )
    {
        super( testName );
    }

    /**
     * @return the suite of tests being tested
     */
    public static Test suite()
    {
        return new TestSuite( AppTest.class );
    }

    /**
     * Rigourous Test :-)
     */
    public void testApp()
    {
        String res="0";
//        try {
//            res=App.createSheet();
//        } catch (RowsExceededException e) {
//            e.printStackTrace();
//        } catch (WriteException e) {
//            e.printStackTrace();
//        } catch (IOException e) {
//            e.printStackTrace();
//        }

        try {
            res=App.readSheet();
        } catch (BiffException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
        assertEquals("1",res);
    }
}