新手提问，本人想用JAVA POI实现EXCEL中的查找与替换功能，请问大神们如何实现，给个思路也行！
如题，，小弟自己的思路是，先浏览excel 然后从中 找出 符合条件的单元格，，，请问该如何实现！！谢谢诶

------解决方案--------------------
package com.triman.utils;

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


public class ReadExcelUtil {

private HSSFWorkbook wb = null;
private HSSFSheet sheet = null;
private HSSFRow row = null;
private int sheetNum = 0;
private int rowNum = 0;
private FileInputStream fis = null;
private File file = null;

public ReadExcelUtil() {
}

public ReadExcelUtil(File file) {
this.file = file;
}

public void setRowNum(int rowNum) {
this.rowNum = rowNum;
}

public void setSheetNum(int sheetNum) {
this.sheetNum = sheetNum;
}

public void setFile(File file) {
this.file = file;
}

/**
* 读取excel文件获得HSSFWorkbook对象
*/
public void open() throws IOException {
fis = new FileInputStream(file);
wb = new HSSFWorkbook(new POIFSFileSystem(fis));
fis.close();
}

/**
* 返回sheet表数目
*/
public int getSheetCount() {
int sheetCount = -1;
sheetCount = wb.getNumberOfSheets();
return sheetCount;
}

/**
* sheetNum下的记录行数
*/
public int getRowCount() {
if (wb == null)
System.out.println("=============>WorkBook为空");
HSSFSheet sheet = wb.getSheetAt(this.sheetNum);
int rowCount = -1;
rowCount = sheet.getLastRowNum();
return rowCount;
}

/**
* 读取指定sheetNum的rowCount
*/
public int getRowCount(int sheetNum) {
HSSFSheet sheet = wb.getSheetAt(sheetNum);
int rowCount = -1;
rowCount = sheet.getLastRowNum();
return rowCount;
}

/**
* 得到指定行的内容
*/
public String[] readExcelLine(int lineNum) {
return readExcelLine(this.sheetNum, lineNum);
}

/**
* 指定工作表和行数的内容
*/
public String[] readExcelLine(int sheetNum, int lineNum) {
if (sheetNum < 0 || lineNum < 0)
return null;
String[] strExcelLine = null;
try {
sheet = wb.getSheetAt(sheetNum);
row = sheet.getRow(lineNum);

int cellCount = row.getLastCellNum();
strExcelLine = new String[cellCount + 1];
for (int i = 0; i <= cellCount; i++) {
strExcelLine[i] = readStringExcelCell(lineNum, i);
}
} catch (Exception e) {
e.printStackTrace();
}
return strExcelLine;
}

/**
* 读取指定列的内容
*/
public String readStringExcelCell(int cellNum) {
return readStringExcelCell(this.rowNum, cellNum);
}

/**
* 指定行和列编号的内容
*/
public String readStringExcelCell(int rowNum, int cellNum) {
return readStringExcelCell(this.sheetNum, rowNum, cellNum);
}

/**
* 指定工作表、行、列下的内容
*/
public String readStringExcelCell(int sheetNum, int rowNum, int cellNum) {
if (sheetNum < 0 || rowNum < 0)
return "";
String strExcelCell = "";
try {
sheet = wb.getSheetAt(sheetNum);
row = sheet.getRow(rowNum);

if (row.getCell((short) cellNum) != null) { 
switch (row.getCell((short) cellNum).getCellType()) {
case HSSFCell.CELL_TYPE_FORMULA:
strExcelCell = "FORMULA ";
break;
case HSSFCell.CELL_TYPE_NUMERIC:
strExcelCell = String.valueOf(row.getCell((short) cellNum).getNumericCellValue());