更新时间：2017年4月12日11:46:14
修改日志:
1.读取完毕，关闭流
2.修复传入指定行为空的时候，死循环的重大bug
/**
* Project Name:
* File Name:ExcelUtil.java
* Package Name:com.lkx.util
* Date:2016年12月9日下午6:13:43
* Copyright (c)
*
*/
package com.lkx.util;
import java.io.FileInputStream;
import java.io.InputStream;
import java.lang.reflect.Method;
import java.math.BigDecimal;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Set;
import org.apache.commons.lang3.StringUtils;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.DateUtil;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.ss.usermodel.Workbook;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.BeanUtils;
/**
*
* ClassName: ExcelUtil Function: TODO ADD FUNCTION Reason: TODO ADD REASON(可选)
* date: 2016年12月9日 下午6:07:11
*
* 只需要两步即可完成以前复杂的Excel读取
* 用法步骤：
* 1.定义需要读取的表头字段和表头对应的属性字段 String keyValue = "手机名称:phoneName,颜色:color,售价:price";
* 2.读取数据 List<PhoneModel> list = ExcelUtil.readXls("C://test.xlsx", ExcelUtil.getMap(keyValue),"com.lkx.excel.PhoneModel");
*
* @author likaixuan
* @version
* @since JDK 1.7
*/
public class ExcelUtil {
private static final Logger LOGGER = LoggerFactory.getLogger(ExcelUtil.class);
/**
* getMap:(将传进来的表头和表头对应的属性存进Map集合，表头字段为key,属性为value)
*
* @author likaixuan
* @param 把传进指定格式的字符串解析到Map中
* 形如: String keyValue = "手机名称:phoneName,颜色:color,售价:price";
* @return
* @since JDK 1.7
*/
public static Map<String, String> getMap(String keyValue) {
Map<String, String> map = new HashMap<String, String>();
if (keyValue != null) {
String[] str = keyValue.split(",");
for (String element : str) {
String[] str2 = element.split(":");
map.put(str2[0], str2[1]);
}
}
return map;
}
/**
* readXls:(根据传进来的map集合读取Excel) 传进来4个参数，
* 第一个Excel文件所在位置
* 第二个map集合,形如<String,String>类型，如ExcelUtil开头说明
* 第三个要转换类所在包
* 第四个为可变参数，如果传改参数，表示将从该行开始读取
* @author likaixuan
* @param filePath
* @param map
* @param classPath
* @return
* @throws Exception
* @since JDK 1.7
*/
public static <T> List<T> readXls(String filePath, Map map,
String classPath, int... rowNumIndex) throws Exception {
Set keySet = map.keySet();// 返回键的集合
/** 反射用 **/
Class<?> demo = null;
Object obj = null;
/** 反射用 **/
List<Object> list = new ArrayList<Object>();
demo = Class.forName(classPath);
String fileType = filePath.substring(filePath.lastIndexOf(".") + 1,
filePath.length());
InputStream is = new FileInputStream(filePath);
Workbook wb = null;
if (fileType.equals("xls")) {
wb = new HSSFWorkbook(is);
} else if (fileType.equals("xlsx")) {
wb = new XSSFWorkbook(is);
} else {
log.error("您输入的excel格式不正确");
throw new Exception("您输入的excel格式不正确");
}
for (int sheetNum = 0; sheetNum < wb.getNumberOfSheets(); sheetNum++) {// 获取每个Sheet表
int rowNum_x = -1;// 记录第x行为表头
Map<String, Integer> cellmap = new HashMap<String, Integer>();// 存放每一个field字段对应所在的列的序号
Sheet hssfSheet = wb.getSheetAt(sheetNum);
// 循环行Row
for (int rowNum = 0; rowNum <= hssfSheet
.getLastRowNum(); rowNum++) {
if (rowNumIndex != null && rowNumIndex.length > 0
&& rowNum_x == -1) {//如果传值指定从第几行开始读，就不自动寻找
Row hssfRow = hssfSheet.getRow(rowNumIndex[0]);
if (hssfRow == null) {
throw new RuntimeException("指定的行为空，请检查");
}
rowNum = rowNumIndex[0] - 1;
}
Row hssfRow = hssfSheet.getRow(rowNum);
if (hssfRow == null) {
continue;
}
boolean flag = false;
for (int i = 0; i < hssfRow.getLastCellNum(); i++) {
if (hssfRow.getCell(i) != null && !("")
.equals(hssfRow.getCell(i).toString().trim())) {
flag = true;
}
}
if (!flag) {
continue;
}
if (rowNum_x == -1) {
// 循环列Cell
for (int cellNum = 0; cellNum <= hssfRow
.getLastCellNum(); cellNum++) {
Cell hssfCell = hssfRow.getCell(cellNum);
if (hssfCell == null) {
continue;
}
String tempCellValue = hssfSheet.getRow(rowNum)
.getCell(cellNum).getStringCellValue();
tempCellValue = StringUtils.remove(tempCellValue,
(char) 160);
tempCellValue = tempCellValue.trim();
Iterator it = keySet.iterator();
while (it.hasNext()) {
Object key = it.next();
if (StringUtils.isNotBlank(tempCellValue)
&& StringUtils.equals(tempCellValue,
key.toString())) {
rowNum_x = rowNum;
cellmap.put(map.get(key).toString(), cellNum);
}
}
if (rowNum_x == -1) {
log.error("没有找到对应的字段或者对应字段行上面含有不为空白的行字段");
throw new Exception("没有找到对应的字段或者对应字段行上面含有不为空白的行字段");
}
}
} else {
obj = demo.newInstance();
Iterator it = keySet.iterator();
while (it.hasNext()) {
Object key = it.next();
Integer cellNum_x = cellmap.get(map.get(key).toString());
if (cellNum_x == null || hssfRow.getCell(cellNum_x) == null) {
continue;
}
String attr = map.get(key).toString();// 得到属性
Class<?> attrType = BeanUtils.findPropertyType(attr,new Class[] { obj.getClass() });
Cell cell = hssfRow.getCell(cellNum_x);
getValue(cell, obj, attr, attrType, rowNum, cellNum_x,key);
}
list.add(obj);
}
}
}
is.close();
// wb.close();
return (List<T>) list;
}
/**
* setter:(反射的set方法给属性赋值)
*
* @author likaixuan
* @param obj
* 具体的类
* @param att
* 类的属性@注意首字母记得大写
* @param value
* 赋予属性的值
* @param type
* 属性是哪种类型 比如:String double boolean等类型
* @throws Exception
* @since JDK 1.7
*/
public static void setter(Object obj, String att, Object value,
Class<?> type, int row, int col, Object key) throws Exception {
try {
Method method = obj.getClass().getMethod(
"set" + StringUtil.toUpperCaseFirstOne(att), type);
method.invoke(obj, value);
} catch (Exception e) {
e.printStackTrace();
LOGGER.error("第" + (row + 1) + " 行 " + (col + 1) + "列 属性：" + key
+ " 赋值异常 " + e.getStackTrace());
throw new Exception("第" + (row + 1) + " 行 " + (col + 1) + "列 属性："
+ key + " 赋值异常 ");
}
}
/**
* getValue:(得到Excel列的值)
*
* @author likaixuan
* @param hssfCell
* @return
* @throws Exception
* @since JDK 1.7
*/
public static void getValue(Cell cell, Object obj, String attr,
Class attrType, int row, int col, Object key) throws Exception {
Object val = null;
if (cell.getCellType() == Cell.CELL_TYPE_BOOLEAN) {
val = cell.getBooleanCellValue();
} else if (cell.getCellType() == Cell.CELL_TYPE_NUMERIC) {
if (DateUtil.isCellDateFormatted(cell)) {
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
try {
if (attrType == String.class) {
val = sdf.format(DateUtil
.getJavaDate(cell.getNumericCellValue()));
} else {
val = DateFormateUtil.dateConvertFormat(
sdf.format(DateUtil.getJavaDate(
cell.getNumericCellValue())));
}
} catch (ParseException e) {
LOGGER.error("日期格式转换错误");
throw new Exception("第" + (row + 1) + " 行 " + (col + 1)
+ "列 属性：" + key + " 日期格式转换错误 ");
}
} else {
if (attrType == String.class) {
cell.setCellType(Cell.CELL_TYPE_STRING);
val = cell.getStringCellValue();
} else if (attrType == BigDecimal.class) {
val = new BigDecimal(cell.getNumericCellValue());
} else if (attrType == long.class) {
val = (long) cell.getNumericCellValue();
} else if (attrType == Double.class) {
val = cell.getNumericCellValue();
} else if (attrType == Float.class) {
val = (float) cell.getNumericCellValue();
} else if (attrType == int.class || attrType == Integer.class) {
val = (int) cell.getNumericCellValue();
} else if(attrType == Short.class){
val = (short) cell.getNumericCellValue();
}else{
val = cell.getNumericCellValue();
}
}
} else if (cell.getCellType() == Cell.CELL_TYPE_STRING) {
val = cell.getStringCellValue();
}
setter(obj, attr, val, attrType, row, col, key);
}
}
<!--引用类-->
/**
* Project Name:servicetemplate
* File Name:StringUtil.java
* Package Name:com.lkx.comm
* Date:2016年12月30日下午4:36:03
* Copyright (c)
*
*/
package com.lkx.util;
import java.util.ArrayList;
import java.util.List;
/**
* ClassName:StringUtil Function: TODO ADD FUNCTION. Reason: TODO ADD REASON.
* Date: 2016年12月30日 下午4:36:03
*
* @author lifahui
* @version V1.0
* @since JDK 1.7
* @see
*/
public class StringUtil {
/**
* 首字母转小写
*
* @param s
* @return
*/
public static String toLowerCaseFirstOne(String s) {
if (Character.isLowerCase(s.charAt(0))) {
return s;
} else {
return (new StringBuilder())
.append(Character.toLowerCase(s.charAt(0)))
.append(s.substring(1)).toString();
}
}
/**
* 首字母转大写
*
* @param s
* @return
*/
public static String toUpperCaseFirstOne(String s) {
if (Character.isUpperCase(s.charAt(0))) {
return s;
} else {
return (new StringBuilder())
.append(Character.toUpperCase(s.charAt(0)))
.append(s.substring(1)).toString();
}
}
/**
* replace:(替换字符串函数)
*
* @param strSource
* 源字符串
* @param strFrom
* 要替换的子串
* @param strTo
* 替换为的字符串
* @return
* @since JDK 1.7
*/
public static String replace(String strSource, String strFrom,
String strTo) {
// 如果要替换的子串为空，则直接返回源串
if (strFrom == null || strFrom.equals(""))
return strSource;
String strDest = "";
// 要替换的子串长度
int intFromLen = strFrom.length();
int intPos;
// 循环替换字符串
while ((intPos = strSource.indexOf(strFrom)) != -1) {
// 获取匹配字符串的左边子串
strDest = strDest + strSource.substring(0, intPos);
// 加上替换后的子串
strDest = strDest + strTo;
// 修改源串为匹配子串后的子串
strSource = strSource.substring(intPos + intFromLen);
}
// 加上没有匹配的子串
strDest = strDest + strSource;
// 返回
return strDest;
}
public static void main(String[] args) throws Exception {
List<String> list = new ArrayList<String>();
for(int i=0;i<100;i++){
list.add("likaixuan"+i);
}
int oneNum = 99;
String ids = "";
for(int i=0;i<list.size();i++){
if((i+1)%oneNum == 0 || ((i+1)==list.size())){
ids+=list.get(i)+",";
System.out.println("============"+ids);
ids="";
}else{
ids+=list.get(i)+",";
}
}
}
}
<!-- pom引入 -->
<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi-ooxml</artifactId>
<version>3.8</version>
</dependency>
ExcelUtil万能读取
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