读取excel数据的java类

项目中用户需要导入大量Excel表格数据到数据库，为此需求自己写了一个读取Excel数据的java类，现将代码贴出来与大家一起分享。
该类提供两个方法，一个方法用于读取Excel表格的表头，另一个方法用于读取Excel表格的内容。
（注：本类需要POI组件的支持，POI是apache组织下的一个开源组件，）
代码如下：
Java代码
package org.hnylj.poi.util;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;
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;
import org.apache.poi.poifs.filesystem.POIFSFileSystem;
/**
* 操作Excel表格的功能类
* @author：hnylj
* @version 1.0
*/
public class ExcelReader {
private POIFSFileSystem fs;
private HSSFWorkbook wb;
private HSSFSheet sheet;
private HSSFRow row;
/**
* 读取Excel表格表头的内容
* @param InputStream
* @return String 表头内容的数组
*
*/
public String[] readExcelTitle(InputStream is) {
try {
fs = new POIFSFileSystem(is);
wb = new HSSFWorkbook(fs);
} catch (IOException e) {
e.printStackTrace();
}
sheet = wb.getSheetAt(0);
row = sheet.getRow(0);
//标题总列数
int colNum = row.getPhysicalNumberOfCells();
String[] title = new String[colNum];
for (int i=0; i<colNum; i++) {
title[i] = getStringCellValue(row.getCell((short) i));
}
return title;
}
/**
* 读取Excel数据内容
* @param InputStream
* @return Map 包含单元格数据内容的Map对象
*/
public Map<Integer,String> readExcelContent(InputStream is) {
Map<Integer,String> content = new HashMap<Integer,String>();
String str = "";
try {
fs = new POIFSFileSystem(is);
wb = new HSSFWorkbook(fs);
} catch (IOException e) {
e.printStackTrace();
}
sheet = wb.getSheetAt(0);
//得到总行数
int rowNum = sheet.getLastRowNum();
row = sheet.getRow(0);
int colNum = row.getPhysicalNumberOfCells();
//正文内容应该从第二行开始,第一行为表头的标题
for (int i = 1; i <= rowNum; i++) {
row = sheet.getRow(i);
int j = 0;
while (j<colNum) {
//每个单元格的数据内容用"-"分割开，以后需要时用String类的replace()方法还原数据
//也可以将每个单元格的数据设置到一个javabean的属性中，此时需要新建一个javabean
str += getStringCellValue(row.getCell((short) j)).trim() + "-";
j ++;
}
content.put(i, str);
str = "";
}
return content;
}
/**
* 获取单元格数据内容为字符串类型的数据
* @param cell Excel单元格
* @return String 单元格数据内容
*/
private String getStringCellValue(HSSFCell cell) {
String strCell = "";
switch (cell.getCellType()) {
case HSSFCell.CELL_TYPE_STRING:
strCell = cell.getStringCellValue();
break;
case HSSFCell.CELL_TYPE_NUMERIC:
strCell = String.valueOf(cell.getNumericCellValue());
break;
case HSSFCell.CELL_TYPE_BOOLEAN:
strCell = String.valueOf(cell.getBooleanCellValue());
break;
case HSSFCell.CELL_TYPE_BLANK:
strCell = "";
break;
default:
strCell = "";
break;
}
if (strCell.equals("") || strCell == null) {
return "";
}
if (cell == null) {
return "";
}
return strCell;
}

/**
* 获取单元格数据内容为日期类型的数据
* @param cell Excel单元格
* @return String 单元格数据内容
*/
private String getDateCellValue(HSSFCell cell) {
String result = "";
try {
int cellType = cell.getCellType();
if (cellType == HSSFCell.CELL_TYPE_NUMERIC) {
Date date = cell.getDateCellValue();
result = (date.getYear() + 1900) + "-" + (date.getMonth() + 1)
+ "-" + date.getDate();
} else if (cellType == HSSFCell.CELL_TYPE_STRING) {
String date = getStringCellValue(cell);
result = date.replaceAll("[年月]", "-").replace("日", "").trim();
} else if (cellType == HSSFCell.CELL_TYPE_BLANK) {
result = "";
}
} catch (Exception e) {
System.out.println("日期格式不正确!");
e.printStackTrace();
}
return result;
}
public static void main(String[] args) {
try {
//对读取Excel表格标题测试
InputStream is = new FileInputStream("C:\\Excel表格测试.xls");
ExcelReader excelReader = new ExcelReader();
String[] title = excelReader.readExcelTitle(is);
System.out.println("获得Excel表格的标题:");
for (String s : title) {
System.out.print(s + " ");
}
//对读取Excel表格内容测试
InputStream is2 = new FileInputStream("C:\\Excel表格测试.xls");
Map<Integer,String> map = excelReader.readExcelContent(is2);
System.out.println("获得Excel表格的内容:");
for (int i=1; i<=map.size(); i++) {
System.out.println(map.get(i));
}
} catch (FileNotFoundException e) {
System.out.println("未找到指定路径的文件!");
e.printStackTrace();
}
}
}
Java代码
package org.hnylj.poi.util;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;
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;
import org.apache.poi.poifs.filesystem.POIFSFileSystem;
/**
* 操作Excel表格的功能类
* @author：hnylj
* @version 1.0
*/
public class ExcelReader {
private POIFSFileSystem fs;
private HSSFWorkbook wb;
private HSSFSheet sheet;
private HSSFRow row;
/**
* 读取Excel表格表头的内容
* @param InputStream
* @return String 表头内容的数组
*
*/
public String[] readExcelTitle(InputStream is) {
try {
fs = new POIFSFileSystem(is);
wb = new HSSFWorkbook(fs);
} catch (IOException e) {
e.printStackTrace();
}
sheet = wb.getSheetAt(0);
row = sheet.getRow(0);
//标题总列数
int colNum = row.getPhysicalNumberOfCells();
String[] title = new String[colNum];
for (int i=0; i<colNum; i++) {
title[i] = getStringCellValue(row.getCell((short) i));
}
return title;
}
/**
* 读取Excel数据内容
* @param InputStream
* @return Map 包含单元格数据内容的Map对象
*/
public Map<Integer,String> readExcelContent(InputStream is) {
Map<Integer,String> content = new HashMap<Integer,String>();
String str = "";
try {
fs = new POIFSFileSystem(is);
wb = new HSSFWorkbook(fs);
} catch (IOException e) {
e.printStackTrace();
}
sheet = wb.getSheetAt(0);
//得到总行数
int rowNum = sheet.getLastRowNum();
row = sheet.getRow(0);
int colNum = row.getPhysicalNumberOfCells();
//正文内容应该从第二行开始,第一行为表头的标题
for (int i = 1; i <= rowNum; i++) {
row = sheet.getRow(i);
int j = 0;
while (j<colNum) {
//每个单元格的数据内容用"-"分割开，以后需要时用String类的replace()方法还原数据
//也可以将每个单元格的数据设置到一个javabean的属性中，此时需要新建一个javabean
str += getStringCellValue(row.getCell((short) j)).trim() + "-";
j ++;
}
content.put(i, str);
str = "";
}
return content;
}
/**
* 获取单元格数据内容为字符串类型的数据
* @param cell Excel单元格
* @return String 单元格数据内容
*/
private String getStringCellValue(HSSFCell cell) {
String strCell = "";
switch (cell.getCellType()) {
case HSSFCell.CELL_TYPE_STRING:
strCell = cell.getStringCellValue();
break;
case HSSFCell.CELL_TYPE_NUMERIC:
strCell = String.valueOf(cell.getNumericCellValue());
break;
case HSSFCell.CELL_TYPE_BOOLEAN:
strCell = String.valueOf(cell.getBooleanCellValue());
break;
case HSSFCell.CELL_TYPE_BLANK:
strCell = "";
break;
default:
strCell = "";
break;
}
if (strCell.equals("") || strCell == null) {
return "";
}
if (cell == null) {
return "";
}
return strCell;
}
/**
* 获取单元格数据内容为日期类型的数据
* @param cell Excel单元格
* @return String 单元格数据内容
*/
private String getDateCellValue(HSSFCell cell) {
String result = "";
try {
int cellType = cell.getCellType();
if (cellType == HSSFCell.CELL_TYPE_NUMERIC) {
Date date = cell.getDateCellValue();
result = (date.getYear() + 1900) + "-" + (date.getMonth() + 1)
+ "-" + date.getDate();
} else if (cellType == HSSFCell.CELL_TYPE_STRING) {
String date = getStringCellValue(cell);
result = date.replaceAll("[年月]", "-").replace("日", "").trim();
} else if (cellType == HSSFCell.CELL_TYPE_BLANK) {
result = "";
}
} catch (Exception e) {
System.out.println("日期格式不正确!");
e.printStackTrace();
}
return result;
}
public static void main(String[] args) {
try {
//对读取Excel表格标题测试
InputStream is = new FileInputStream("C:\\Excel表格测试.xls");
ExcelReader excelReader = new ExcelReader();
String[] title = excelReader.readExcelTitle(is);
System.out.println("获得Excel表格的标题:");
for (String s : title) {
System.out.print(s + " ");
}
//对读取Excel表格内容测试
InputStream is2 = new FileInputStream("C:\\Excel表格测试.xls");
Map<Integer,String> map = excelReader.readExcelContent(is2);
System.out.println("获得Excel表格的内容:");
for (int i=1; i<=map.size(); i++) {
System.out.println(map.get(i));
}
} catch (FileNotFoundException e) {
System.out.println("未找到指定路径的文件!");
e.printStackTrace();
}
}
}
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package org.hnylj.poi.util;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;
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;
import org.apache.poi.poifs.filesystem.POIFSFileSystem;
/**
* 操作Excel表格的功能类
* @author：hnylj
* @version 1.0
*/
public class ExcelReader {
private POIFSFileSystem fs;
private HSSFWorkbook wb;
private HSSFSheet sheet;
private HSSFRow row;
/**
* 读取Excel表格表头的内容
* @param InputStream
* @return String 表头内容的数组
*
*/
public String[] readExcelTitle(InputStream is) {
try {
fs = new POIFSFileSystem(is);
wb = new HSSFWorkbook(fs);
} catch (IOException e) {
e.printStackTrace();
}
sheet = wb.getSheetAt(0);
row = sheet.getRow(0);
//标题总列数
int colNum = row.getPhysicalNumberOfCells();
String[] title = new String[colNum];
for (int i=0; i<colNum; i++) {
title[i] = getStringCellValue(row.getCell((short) i));
}
return title;
}
/**
* 读取Excel数据内容
* @param InputStream
* @return Map 包含单元格数据内容的Map对象
*/
public Map<Integer,String> readExcelContent(InputStream is) {
Map<Integer,String> content = new HashMap<Integer,String>();
String str = "";
try {
fs = new POIFSFileSystem(is);
wb = new HSSFWorkbook(fs);
} catch (IOException e) {
e.printStackTrace();
}
sheet = wb.getSheetAt(0);
//得到总行数
int rowNum = sheet.getLastRowNum();
row = sheet.getRow(0);
int colNum = row.getPhysicalNumberOfCells();
//正文内容应该从第二行开始,第一行为表头的标题
for (int i = 1; i <= rowNum; i++) {
row = sheet.getRow(i);
int j = 0;
while (j<colNum) {
//每个单元格的数据内容用"-"分割开，以后需要时用String类的replace()方法还原数据
//也可以将每个单元格的数据设置到一个javabean的属性中，此时需要新建一个javabean
str += getStringCellValue(row.getCell((short) j)).trim() + "-";
j ++;
}
content.put(i, str);
str = "";
}
return content;
}
/**
* 获取单元格数据内容为字符串类型的数据
* @param cell Excel单元格
* @return String 单元格数据内容
*/
private String getStringCellValue(HSSFCell cell) {
String strCell = "";
switch (cell.getCellType()) {
case HSSFCell.CELL_TYPE_STRING:
strCell = cell.getStringCellValue();
break;
case HSSFCell.CELL_TYPE_NUMERIC:
strCell = String.valueOf(cell.getNumericCellValue());
break;
case HSSFCell.CELL_TYPE_BOOLEAN:
strCell = String.valueOf(cell.getBooleanCellValue());
break;
case HSSFCell.CELL_TYPE_BLANK:
strCell = "";
break;
default:
strCell = "";
break;
}
if (strCell.equals("") || strCell == null) {
return "";
}
if (cell == null) {
return "";
}
return strCell;
}
/**
* 获取单元格数据内容为日期类型的数据
* @param cell Excel单元格
* @return String 单元格数据内容
*/
private String getDateCellValue(HSSFCell cell) {
String result = "";
try {
int cellType = cell.getCellType();
if (cellType == HSSFCell.CELL_TYPE_NUMERIC) {
Date date = cell.getDateCellValue();
result = (date.getYear() + 1900) + "-" + (date.getMonth() + 1)
+ "-" + date.getDate();
} else if (cellType == HSSFCell.CELL_TYPE_STRING) {
String date = getStringCellValue(cell);
result = date.replaceAll("[年月]", "-").replace("日", "").trim();
} else if (cellType == HSSFCell.CELL_TYPE_BLANK) {
result = "";
}

} catch (Exception e) {
<A title=system href="http://www.alimama.com/membersvc/buyadzone/buy_ad_zone.htm?adzoneid=892989 " target=_blank>system</A>.out.println("日期格式不正确!");
e.printStackTrace();
}
return result;
}
public static void main(String[] args) {
try {
//对读取Excel表格标题测试
InputStream is = new FileInputStream("C:\\Excel表格测试.xls");
ExcelReader excelReader = new ExcelReader();
String[] title = excelReader.readExcelTitle(is);
<A title=system href="http://www.alimama.com/membersvc/buyadzone/buy_ad_zone.htm?adzoneid=892989 " target=_blank>system</A>.out.println("获得Excel表格的标题:");
for (String s : title) {
<A title=system href="http://www.alimama.com/membersvc/buyadzone/buy_ad_zone.htm?adzoneid=892989 " target=_blank>system</A>.out.print(s + " ");
}
//对读取Excel表格内容测试
InputStream is2 = new FileInputStream("C:\\Excel表格测试.xls");
Map<Integer,String> map = excelReader.readExcelContent(is2);
<A title=system href="http://www.alimama.com/membersvc/buyadzone/buy_ad_zone.htm?adzoneid=892989 " target=_blank>system</A>.out.println("获得Excel表格的内容:");
for (int i=1; i<=map.size(); i++) {
<A title=system href="http://www.alimama.com/membersvc/buyadzone/buy_ad_zone.htm?adzoneid=892989 " target=_blank>system</A>.out.println(map.get(i));
}
} catch (FileNotFoundException e) {
<A title=system href="http://www.alimama.com/membersvc/buyadzone/buy_ad_zone.htm?adzoneid=892989 " target=_blank>system</A>.out.println("未找到指定路径的文件!");
e.printStackTrace();
}
}
}
package org.hnylj.poi.util;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;
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;
import org.apache.poi.poifs.filesystem.POIFSFileSystem;
/**
* 操作Excel表格的功能类
* @author：hnylj
* @version 1.0
*/
public class ExcelReader {
private POIFSFileSystem fs;
private HSSFWorkbook wb;
private HSSFSheet sheet;
private HSSFRow row;
/**
* 读取Excel表格表头的内容
* @param InputStream
* @return String 表头内容的数组
*
*/
public String[] readExcelTitle(InputStream is) {
try {
fs = new POIFSFileSystem(is);
wb = new HSSFWorkbook(fs);
} catch (IOException e) {
e.printStackTrace();
}
sheet = wb.getSheetAt(0);
row = sheet.getRow(0);
//标题总列数
int colNum = row.getPhysicalNumberOfCells();
String[] title = new String[colNum];
for (int i=0; i<colNum; i++) {
title[i] = getStringCellValue(row.getCell((short) i));
}
return title;
}
/**
* 读取Excel数据内容
* @param InputStream
* @return Map 包含单元格数据内容的Map对象
*/
public Map<Integer,String> readExcelContent(InputStream is) {
Map<Integer,String> content = new HashMap<Integer,String>();
String str = "";
try {
fs = new POIFSFileSystem(is);
wb = new HSSFWorkbook(fs);
} catch (IOException e) {
e.printStackTrace();
}
sheet = wb.getSheetAt(0);
//得到总行数
int rowNum = sheet.getLastRowNum();
row = sheet.getRow(0);
int colNum = row.getPhysicalNumberOfCells();
//正文内容应该从第二行开始,第一行为表头的标题
for (int i = 1; i <= rowNum; i++) {
row = sheet.getRow(i);
int j = 0;
while (j<colNum) {
//每个单元格的数据内容用"-"分割开，以后需要时用String类的replace()方法还原数据
//也可以将每个单元格的数据设置到一个javabean的属性中，此时需要新建一个javabean
str += getStringCellValue(row.getCell((short) j)).trim() + "-";
j ++;
}
content.put(i, str);
str = "";
}
return content;
}
/**
* 获取单元格数据内容为字符串类型的数据
* @param cell Excel单元格
* @return String 单元格数据内容
*/
private String getStringCellValue(HSSFCell cell) {
String strCell = "";
switch (cell.getCellType()) {
case HSSFCell.CELL_TYPE_STRING:
strCell = cell.getStringCellValue();
break;
case HSSFCell.CELL_TYPE_NUMERIC:
strCell = String.valueOf(cell.getNumericCellValue());
break;
case HSSFCell.CELL_TYPE_BOOLEAN:
strCell = String.valueOf(cell.getBooleanCellValue());
break;

case HSSFCell.CELL_TYPE_BLANK:
strCell = "";
break;
default:
strCell = "";
break;
}
if (strCell.equals("") || strCell == null) {
return "";
}
if (cell == null) {
return "";
}
return strCell;
}
/**
* 获取单元格数据内容为日期类型的数据
* @param cell Excel单元格
* @return String 单元格数据内容
*/
private String getDateCellValue(HSSFCell cell) {
String result = "";
try {
int cellType = cell.getCellType();
if (cellType == HSSFCell.CELL_TYPE_NUMERIC) {
Date date = cell.getDateCellValue();
result = (date.getYear() + 1900) + "-" + (date.getMonth() + 1)
+ "-" + date.getDate();
} else if (cellType == HSSFCell.CELL_TYPE_STRING) {
String date = getStringCellValue(cell);
result = date.replaceAll("[年月]", "-").replace("日", "").trim();
} else if (cellType == HSSFCell.CELL_TYPE_BLANK) {
result = "";
}
} catch (Exception e) {
system.out.println("日期格式不正确!");
e.printStackTrace();
}
return result;
}
public static void main(String[] args) {
try {
//对读取Excel表格标题测试
InputStream is = new FileInputStream("C:\\Excel表格测试.xls");
ExcelReader excelReader = new ExcelReader();
String[] title = excelReader.readExcelTitle(is);
system.out.println("获得Excel表格的标题:");
for (String s : title) {
system.out.print(s + " ");
}
//对读取Excel表格内容测试
InputStream is2 = new FileInputStream("C:\\Excel表格测试.xls");
Map<Integer,String> map = excelReader.readExcelContent(is2);
system.out.println("获得Excel表格的内容:");
for (int i=1; i<=map.size(); i++) {
system.out.println(map.get(i));
}
} catch (FileNotFoundException e) {
system.out.println("未找到指定路径的文件!");
e.printStackTrace();
}
}
}
通过该类提供的方法就能读取出Excel表格中的数据，数据读取出来了，其他的，对这些数据进行怎样的操作，要靠你另外写程序去实现，因为该类只提供读取Excel表格数据的功能。

说明：在该类中有一个getStringCellValue(HSSFCell cell)方法和一个getDateCellValue(HSSFCell cell)方法，前一个方法用于读取那些为字符串类型的数据，如果你的Excel表格中填写的是日期类型的数据，则你应该在readExcelContent(InputStream is)方法里调用getDateCellValue(HSSFCell cell)方法，因为若调用getStringCellValue(HSSFCell cell)方法读取日期类型的数据将得到的是一个浮点数，这很可能不符合实际要求。