1、效果圖
2、具體代碼實現
excel 讀取工具類
package utils;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;
import org.apache.log4j.Logger;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.ss.usermodel.Cell;
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;
/**
* excel讀寫工具類 */
public class POIUtil2 {
private static Logger logger = Logger.getLogger(POIUtil2.class);
private final static String xls = "xls";
private final static String xlsx = "xlsx";
/**
* 讀入excel文件，解析后返回
* @param file
* @throws IOException
*/
public static List<String[]> readExcel(File file) throws IOException{
//檢查文件
checkFile(file);
//獲得Workbook工作薄對象
Workbook workbook = getWorkBook(file);
//創建返回對象，把每行中的值作為一個數組，所有行作為一個集合返回
List<String[]> list = new ArrayList<String[]>();
if(workbook != null){
for(int sheetNum = 0;sheetNum < workbook.getNumberOfSheets();sheetNum++){
//獲得當前sheet工作表
Sheet sheet = workbook.getSheetAt(sheetNum);
if(sheet == null){
continue;
}
//獲得當前sheet的開始行
int firstRowNum = sheet.getFirstRowNum();
//獲得當前sheet的結束行
int lastRowNum = sheet.getLastRowNum();
//循環除了第一行的所有行
// for(int rowNum = firstRowNum+1;rowNum <= lastRowNum;rowNum++){
for(int rowNum = firstRowNum;rowNum <= lastRowNum;rowNum++){
//獲得當前行
Row row = sheet.getRow(rowNum);
if(row == null){
continue;
}
//獲得當前行的開始列
int firstCellNum = row.getFirstCellNum();
//獲得當前行的列數
int lastCellNum = row.getPhysicalNumberOfCells();
String[] cells = new String[row.getPhysicalNumberOfCells()];
//循環當前行
for(int cellNum = firstCellNum; cellNum < lastCellNum;cellNum++){
Cell cell = row.getCell(cellNum);
cells[cellNum] = getCellValue(cell);
}
list.add(cells);
}
}
workbook.close();
}
return list;
}
public static void checkFile(File file) throws IOException{
//判斷文件是否存在
if(null == file){
logger.error("文件不存在！");
throw new FileNotFoundException("文件不存在！");
}
//獲得文件名
String fileName = file.getName();
//判斷文件是否是excel文件
if(!fileName.endsWith(xls) && !fileName.endsWith(xlsx)){
logger.error(fileName + "不是excel文件");
throw new IOException(fileName + "不是excel文件");
}
}
public static Workbook getWorkBook(File file) {
//獲得文件名
String fileName = file.getName();
//創建Workbook工作薄對象，表示整個excel
Workbook workbook = null;
try {
//獲取excel文件的io流
InputStream is = new FileInputStream(file);
//根據文件后綴名不同(xls和xlsx)獲得不同的Workbook實現類對象
if(fileName.endsWith(xls)){
//2003
workbook = new HSSFWorkbook(is);
}else if(fileName.endsWith(xlsx)){
//2007
workbook = new XSSFWorkbook(is);
}
} catch (IOException e) {
logger.info(e.getMessage());
}
return workbook;
}
public static String getCellValue(Cell cell){
String cellValue = "";
if(cell == null){
return cellValue;
}
//把數字當成String來讀，避免出現1讀成1.0的情況
if(cell.getCellType() == Cell.CELL_TYPE_NUMERIC){
cell.setCellType(Cell.CELL_TYPE_STRING);
}
//判斷數據的類型
switch (cell.getCellType()){
case Cell.CELL_TYPE_NUMERIC: //數字
cellValue = String.valueOf(cell.getNumericCellValue());
break;
case Cell.CELL_TYPE_STRING: //字符串
cellValue = String.valueOf(cell.getStringCellValue());
break;
case Cell.CELL_TYPE_BOOLEAN: //Boolean
cellValue = String.valueOf(cell.getBooleanCellValue());
break;
case Cell.CELL_TYPE_FORMULA: //公式
cellValue = String.valueOf(cell.getCellFormula());
break;
case Cell.CELL_TYPE_BLANK: //空值
cellValue = "";
break;
case Cell.CELL_TYPE_ERROR: //故障
cellValue = "非法字符";
break;
default:
cellValue = "未知類型";
break;
}
return cellValue;
}
}
excel寫入和測試類
package test;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;
import org.apache.poi.hssf.usermodel.HSSFCellStyle;
import org.apache.poi.hssf.util.HSSFColor;
import org.apache.poi.xssf.usermodel.XSSFCell;
import org.apache.poi.xssf.usermodel.XSSFCellStyle;
import org.apache.poi.xssf.usermodel.XSSFFont;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.junit.Test;
import pojo.ReadEntity;
import utils.POIUtil2;
public class readTest {
@Test
public void test() {
try {
// 創建一個Excel對象
XSSFWorkbook wb = new XSSFWorkbook();
// 創建表單Sheet對象
XSSFSheet sheet = wb.createSheet();
XSSFCellStyle style = null;
XSSFCellStyle style1 = getCellStyle(wb, HSSFColor.GREEN.index);
XSSFCellStyle style2 = getCellStyle(wb, HSSFColor.LIGHT_YELLOW.index);
XSSFCellStyle style3 = getCellStyle(wb, HSSFColor.SKY_BLUE.index);
XSSFCellStyle style4 = getCellStyle(wb, HSSFColor.LIGHT_ORANGE.index);
sheet.setColumnWidth(0, 10000); //設置第一列列寬:
sheet.setColumnWidth(1, 10000); //設置第二列列寬:
sheet.setColumnWidth(2, 10000); //設置列寬:
sheet.setColumnWidth(3, 10000); //設置列寬:
sheet.setColumnWidth(4, 10000); //設置列寬:
int count = 0;
int rowNum = 0; //行
Map<String, List<ReadEntity>> map = getData();
for (Entry<String, List<ReadEntity>> entry : map.entrySet()) {
//判斷相同數據用同一種背景顏色，四種背景顏色交替顯示
if (count % 4 == 0) {
style = style1;
} else if (count % 4 == 1) {
style = style2;
} else if (count % 3 == 2) {
style = style3;
} else {
style = style4;
}
List<ReadEntity> value = entry.getValue();
for (ReadEntity temp : value) {
//創建行
XSSFRow row = sheet.createRow(rowNum);
// 創建單元格，此處設置了5列
XSSFCell cell1 = row.createCell(0);
cell1.setCellValue(temp.getTableName());
cell1.setCellStyle(style);
XSSFCell cell2 = row.createCell(1);
cell2.setCellValue(temp.getTableRemark());
cell2.setCellStyle(style);
XSSFCell cell3 = row.createCell(2);
cell3.setCellValue(temp.getField());
cell3.setCellStyle(style);
XSSFCell cell4 = row.createCell(3);
cell4.setCellValue(temp.getFieldRemark());
cell4.setCellStyle(style);
XSSFCell cell5 = row.createCell(4);
cell5.setCellValue(temp.getFieldType());
cell5.setCellStyle(style);
rowNum++;
}
count++;
}
//寫出數據文件
File file = new File("D:/table2.xlsx");
if (!file.exists()) {
file.createNewFile();
}
// 輸出文件
FileOutputStream output = new FileOutputStream(file);
wb.write(output);
output.flush();
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* 獲取本地導入數據
* @return
* @throws IOException
*/
private Map<String, List<ReadEntity>> getData() throws IOException {
File file = new File("D:/table.xlsx");
List<String[]> list = POIUtil2.readExcel(file);
Map<String, List<ReadEntity>> map = new LinkedHashMap<>();
Set<String> set = new HashSet<>();
List<ReadEntity> entites = null;
for (String[] strArr : list) {
if (set.add(strArr[0])) {
entites = new ArrayList<>();
map.put(strArr[0], entites);
}
ReadEntity entity = new ReadEntity();
entity.setTableName(strArr[0]);
entity.setTableRemark(strArr[1]);
entity.setField(strArr[2]);
entity.setFieldRemark(strArr[3]);
entity.setFieldType(strArr[4]);
entites.add(entity);
}
return map;
}
/**
* 得到不同顏色的style樣式
* @param wb
* @param color
* @return
*/
public XSSFCellStyle getCellStyle(XSSFWorkbook wb, Short color) {
XSSFCellStyle style = wb.createCellStyle();
//注意這兩個屬性同時設置才能起作用
// style.setFillForegroundColor(color);// 設置背景色
// style.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);
style.setFillForegroundColor(color);// 設置背景色
style.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);
style.setBorderBottom(HSSFCellStyle.BORDER_THIN); // 下邊框
style.setBorderLeft(HSSFCellStyle.BORDER_THIN);// 左邊框
style.setBorderTop(HSSFCellStyle.BORDER_THIN);// 上邊框
style.setBorderRight(HSSFCellStyle.BORDER_THIN);// 右邊框
// style.setAlignment(HSSFCellStyle.ALIGN_CENTER); // 居中
XSSFFont font = wb.createFont();
font.setFontName("仿宋_GB2312");
// font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);// 粗體顯示
font.setFontHeightInPoints((short) 12); // 字體大小
style.setFont(font);// 選擇需要用到的字體格式
return style;
}
}
