Java读取excel文件数据

1.需要的jar包清单如下：

dom4j-1.6.1.jar
poi-3.5.jar
poi-3.8-20120326.jar
poi-ooxml-3.8-20120326.jar
poi-ooxml-schemas-3.8-20120326.jar
xml-resolver-1.2.jar
xmlbeans-2.3.0.jar
XmlSchema-1.4.3.jar

2.写个工具包，里面包含3个类，包名为com.tc.readexcel.util，源代码如下：

　　1）ReadExcelCertainCellForXls.java

package com.tc.readexcel.util;

import java.io.File;
import java.io.FileInputStream;

import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;

public class ReadExcelCertainCellForXls {


    /**
     * 从file表格文件中读取第sheetNum张表单的第row行第column列
     * @param file
     * @param sheetNum
     * @param row
     * @param column
     * @return
     */
    public String getValue(String file, int sheetNum, int row, String column){
        File f = new File(file);
        FileInputStream is = null;
        HSSFWorkbook wbs = null;
        HSSFSheet childSheet = null;
        try {
            is = new FileInputStream(f);
            wbs = new HSSFWorkbook(is);
            childSheet = wbs.getSheetAt(sheetNum-1);
            readExcelCell(childSheet, row, column);
        }
        catch (Exception e) {
            e.printStackTrace();
        }
        return readExcelCell(childSheet, row, column);
    }


    /**
     * 将指定表单的指定行列读出来
     * @param sheet
     * @param row
     * @param col
     * @return
     */
    private String readExcelCell(HSSFSheet sheet, int row, String col) {
        row = row - 1;
        int column = letterToNumber(col);
        HSSFRow xrow = sheet.getRow(row);
        HSSFCell cell = null;
        if(null != xrow)
        cell = xrow.getCell(column);
        if (null != cell) {
            switch (cell.getCellType()) {
                case HSSFCell.CELL_TYPE_NUMERIC: // 数字
//                    return (cell.getNumericCellValue() + "");
                    String str = cell.getNumericCellValue() + "";
                    if(str.endsWith(".0")){
                        return str.substring(0, str.length()-2);
                    }
                    return (cell.getNumericCellValue() + "");
                case HSSFCell.CELL_TYPE_STRING: // 字符串
                    return (cell.getStringCellValue() + "");
                case HSSFCell.CELL_TYPE_BOOLEAN: // Boolean
                    return (cell.getBooleanCellValue() + "");
                case HSSFCell.CELL_TYPE_FORMULA: // 公式
                    return (cell.getCellFormula() + "");
                case HSSFCell.CELL_TYPE_BLANK: // 空值
                    return ("");
                case HSSFCell.CELL_TYPE_ERROR: // 故障
                    return ("");
                default:
                    return ("未知类型");
            }
        }
        else {
            return ("null");
        }
    }

    
    /**
     * 将输入的字符列名转化为数字列名,注意列数是从0开始，例如 A>0  G>6  AB>27
     * @param col
     * @return
     */
    private int letterToNumber(String col) {

        col = col.toUpperCase();

        char[] ch = col.toCharArray();

        if (ch.length == 1) {
            return (int) ch[0] - 64 - 1;
        }
        else {
            return ((int) ch[0] - (int) 'A' + 1) * 26 + ((int) ch[1] - 64) - 1;
        }
    }
    
    

}

　　2）ReadExcelCertainCellForXlsx.java

package com.tc.readexcel.util;

import java.io.File;
import java.io.FileInputStream;

import org.apache.poi.xssf.usermodel.XSSFCell;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;



public class ReadExcelCertainCellForXlsx {


    
    /**
     * 从file表格文件中读取第sheetNum张表单的第row行第column列
     * @param file
     * @param sheetNum
     * @param row
     * @param column
     * @return
     */
    public String getValue(String file, int sheetNum, int row, String column){
        File f = new File(file);
        FileInputStream is = null;
        XSSFWorkbook wbs = null;
        XSSFSheet childSheet = null;
        try {
            is = new FileInputStream(f);
            wbs = new XSSFWorkbook(is);
            childSheet = wbs.getSheetAt(sheetNum-1);
            readExcelCell(childSheet, row, column);
        }
        catch (Exception e) {
            e.printStackTrace();
        }
        return readExcelCell(childSheet, row, column);
    }


    /**
     * 将指定表单的指定行列读出来
     * @param sheet
     * @param row
     * @param col
     * @return
     */
    private String readExcelCell(XSSFSheet sheet, int row, String col) {
        row = row - 1;
        int column = letterToNumber(col);
        XSSFRow xrow = sheet.getRow(row);
        XSSFCell cell = null;
        if(null != xrow)
        cell = xrow.getCell(column);
        if (null != cell) {
            switch (cell.getCellType()) {
                case XSSFCell.CELL_TYPE_NUMERIC: // 数字
//                    return (cell.getNumericCellValue() + "");
                    String str = cell.getNumericCellValue() + "";
                    if(str.endsWith(".0")){
                        return str.substring(0, str.length()-2);
                    }
                    return (cell.getNumericCellValue() + "");
                case XSSFCell.CELL_TYPE_STRING: // 字符串
                    return (cell.getStringCellValue() + "");
                case XSSFCell.CELL_TYPE_BOOLEAN: // Boolean
                    return (cell.getBooleanCellValue() + "");
                case XSSFCell.CELL_TYPE_FORMULA: // 公式
                    return (cell.getCellFormula() + "");
                case XSSFCell.CELL_TYPE_BLANK: // 空值
                    return ("");
                case XSSFCell.CELL_TYPE_ERROR: // 故障
                    return ("");
                default:
                    return ("未知类型");
            }
        }
        else {
            return ("");
        }
    }

    
    /**
     * 将输入的字符列名转化为数字列名,注意列数是从0开始，例如 A--->0  G--->6  AB--->27
     * @param col
     * @return
     */
    private int letterToNumber(String col) {

        col = col.toUpperCase();

        char[] ch = col.toCharArray();

        if (ch.length == 1) {
            return (int) ch[0] - 64 - 1;
        }
        else {
            return ((int) ch[0] - (int) 'A' + 1) * 26 + ((int) ch[1] - 64) - 1;
        }
    }
    
    

}

　　3）CellValue.java

package com.tc.readexcel.util;

public class CellValue {
    public String getCellValue(String file, int sheetNum, int row, String column){
        
        if(file.endsWith(".xls")){
            return new ReadExcelCertainCellForXls().getValue(file, sheetNum, row, column);
        }else if(file.endsWith(".xlsx")){
            return new ReadExcelCertainCellForXlsx().getValue(file, sheetNum, row, column);
        }else{
            return "";    //可以弹框显示说“您选择的不是excel文件”
        }
    }
    
}

3.读取excel文件内容

package com.tc.test;

import com.tc.readexcel.util.CellValue;

public class Demo {
    
    public static void main(String[] args) {
        
        // excel路径
        String path = "D:\\ING\\明细表.xlsx";
        
        CellValue cv = new CellValue();
        
        // 读取第2行到第9行A列的数据
        for (int i = 2; i < 10; i++) {
            
            String value = cv.getCellValue(path, 1, i, "A").trim();
            
            System.out.println(i + "----------->" + value);
            
        }
        
    }

}