java POI excel导出,并合并单元格设置宽度高度
最近在网上学习了java POI excel导出
整了一个例子，代码也简单，创建行、列、设置宽度高度、合并列
下面贴出我滴代码：
public class Total{
private Integer payWay;
private Float amount;
private String creatTime;
private String endTime;
/**
* 省略 get/set
*/
}package com.excel;
import java.io.FileOutputStream;
import java.util.List;
import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONArray;
import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFCellStyle;
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.ss.util.CellRangeAddress;
import org.junit.Test;
public class TestExportExcel {
private final static String PAY_WAY1 = "现金";
private final static String PAY_WAY2 = "刷卡";
private final static String PAY_WAY3 = "微信";
private final static String PAY_WAY4 = "支付宝";
private final static String PAY_WAY5 = "转帐";
private final static String PAY_WAY46 = "其他";
private final static String NUMBER = "序号";
private final static String PAY_TYPE = "缴费方式";
private final static String PAY_AMOUNT = "缴费金额(元)";
private final static String REMARKS = "备注";
public static final short EXCEL_COLUMN_WIDTH_FACTOR = 256;
public static final int UNIT_OFFSET_LENGTH = 7;
public static final int[] UNIT_OFFSET_MAP = new int[] { 0, 36, 73, 109, 146, 182, 219 };
@Test
public void test(){
TestExportExcel t = new TestExportExcel();
try {
t.testExport();
} catch (Exception e) {
e.printStackTrace();
}
}
public void testExport() throws Exception {
HSSFWorkbook wb = new HSSFWorkbook();
/**
* 创建table工作薄
*/
HSSFSheet sheet = wb.createSheet("缴费汇总表");
String data = "[{\"payWay\":1,\"endTime\":\"2017-09\",\"creatTime\":\"2017-08\",\"amount\":408.5},{\"payWay\":3,\"endTime\":\"2017-09\",\"creatTime\":\"2017-08\",\"amount\":520}]";
JSONArray jsonArray = JSON.parseArray(data);
List totalList = JSON.parseArray(jsonArray+"", Total.class);
HSSFRow row;
HSSFCell cell;
int maixRowNumb = totalList.size()+4;
for(int rowNumb = 0; rowNumb < maixRowNumb; rowNumb++) {
/**
* 开始创建表格行
*/
row = sheet.createRow(rowNumb);
for(int columnNumb = 0; columnNumb < 4; columnNumb++) {
/**
* 创建行单元格
*/
cell = row.createCell(columnNumb);
HSSFCellStyle cellStyle = wb.createCellStyle();
//第一列
if( rowNumb == 0 ) {
cell.setCellValue("缴费汇总表");
}else if( rowNumb == 1 ) {//第二列
if( columnNumb == 3 ){
cell.setCellValue("所属时间:2017-08至2017-09");
}
}else if( rowNumb == 2 ){//第三列
switch (columnNumb){
case 0:
cell.setCellValue(TestExportExcel.NUMBER);
break;
case 1:
cell.setCellValue(TestExportExcel.PAY_TYPE);
break;
case 2:
cell.setCellValue(TestExportExcel.PAY_AMOUNT);
break;
case 3:
cell.setCellValue(TestExportExcel.REMARKS);
break;
}
}else if( rowNumb < maixRowNumb-2 ){
Total Total = totalList.get(rowNumb-3);
if( columnNumb == 0 ){
/**
* 序号
*/
int index = rowNumb-2;
cell.setCellValue(index);
}else if( columnNumb == 1 ){
switch (Total.getPayWay()){
case 1:
cell.setCellValue(TestExportExcel.PAY_WAY1);
break;
case 2:
cell.setCellValue(TestExportExcel.PAY_WAY2);
break;
case 3:
cell.setCellValue(TestExportExcel.PAY_WAY3);
break;
case 4:
cell.setCellValue(TestExportExcel.PAY_WAY4);
break;
case 5:
cell.setCellValue(TestExportExcel.PAY_WAY5);
break;
case 6:
cell.setCellValue(TestExportExcel.PAY_WAY46);
break;
}
}else if( columnNumb == 2 ){
cell.setCellValue(Total.getAmount());
}
}else if( rowNumb < maixRowNumb-1 ){
if( columnNumb == 1 ){
cell.setCellValue("合计");
}else if( columnNumb == 2){
cell.setCellValue(928.5);
}
}
if( rowNumb < maixRowNumb-1){
/**
* 设置内容水平居中
*/
cellStyle.setAlignment(HSSFCellStyle.ALIGN_CENTER);
}
/**
* 设置内容垂直居中
*/
cellStyle.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);
cell.setCellStyle(cellStyle);
}
}
//创建表格之后设置行高
for(int i = 0; i < maixRowNumb; i++) {
//合并单元格
if( i == 0 ){
//参数：起始行号，终止行号， 起始列号，终止列号
sheet.addMergedRegion(new CellRangeAddress(0, 0, 0, 4));
} else if( i == 1 ){
sheet.addMergedRegion(new CellRangeAddress(1, 1, 0, 1));
sheet.addMergedRegion(new CellRangeAddress(1, 1, 3, 4));
}else{
sheet.addMergedRegion(new CellRangeAddress(i, i, 3, 4));
}
/**
* 设置行的高度
*/
row = sheet.getRow(i);
row.setHeightInPoints(30);
}
//设置列宽
for(int j = 0; j < maixRowNumb; j++) {
switch (j){
case 0:
case 1:
case 2:
sheet.setColumnWidth(j, TestExportExcel.pixelWidth(100));
break;
case 3:
sheet.setColumnWidth(j, TestExportExcel.pixelWidth(200));
break;
}
}
wb.write(new FileOutputStream("E:\\table6.xls"));
}
/**
* 宽像素
* @param pxs
* @return
*/
public static short pixelWidth(int pxs) {
short width = (short) (EXCEL_COLUMN_WIDTH_FACTOR * (pxs / UNIT_OFFSET_LENGTH));
width += UNIT_OFFSET_MAP[(pxs % UNIT_OFFSET_LENGTH)];
return width;
}
}