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java easyPOI實現(xiàn)導出一對多數(shù)據(jù)

更新時間：2023年12月06日 08:49:35 作者：Xiao5xiao122

這篇文章主要為大家詳細介紹了java如何利用easyPOI實現(xiàn)導出一對多數(shù)據(jù),并且可以設(shè)置邊框、字體和字體大小,感興趣的小伙伴可以跟隨小編一起學習一下

java easyPOI導出一對多數(shù)據(jù)，設(shè)置邊框，字體，字體大小

需求總是千奇百怪，解決的方式也可以是多種多樣。

今天碰到導出excel是一對多結(jié)構(gòu)的，以往導出的數(shù)據(jù)都是一條一條的，所以采用的是比較方便簡單的方法easyExcel，今天猛然碰到一對多導出雖然用easyExcel也可以，但是相對比較麻煩，沒有easyPOI快捷，之前有自己寫過導出excel一個表格一個表格畫，但是太麻煩。今天正好需求不急，就慢慢研究用easypoi導出，寫出通用方法，以后遇到類似的就好辦多了，直接調(diào)方法。廢話不多說，先上效果圖：

首先是實體中設(shè)置：

public class YjwzStockInVO extends TYjwzStockIn implements Serializable {
	//注意：needMerge = true 必加，不然合并的單元格，邊框不會合并，需要導出的實體加@Excel注解，不需要導出的字段加@ExcelIgnore注解排除
    @Excel(needMerge = true,name = "狀態(tài)名稱")
    @ApiModelProperty(value = "狀態(tài)名稱")
    private String ztmc;

    @Excel(needMerge = true,name = "一級品類")
    @ApiModelProperty(value = "一級物資名稱")
    private String wzOnemc;

    @Excel(needMerge = true,name = "二級品類")
    @ApiModelProperty(value = "二級物資名稱")
    private String wzTwomc;

    @Excel(needMerge = true,name = "三級品類")
    @ApiModelProperty(value = "三級物資名稱")
    private String wzThreemc;

    @Excel(needMerge = true,name = "四級品類")
    @ApiModelProperty(value = "四級物資名稱")
    private String wzRourmc;

    @Excel(needMerge = true,name = "數(shù)據(jù)來源")
    @ApiModelProperty(value = "數(shù)據(jù)來源：1：市應(yīng)急平臺，2：人工新增")
    @DataBindDict(sourceField = "#sjly", sourceFieldCombination = "sjly")
    private String sjlymc;

    @ExcelCollection(name = "應(yīng)急物資明細")
    @ApiModelProperty(value = "應(yīng)急物資詳情")
    private List<YjwzStockInDtlVO> dtlList;
}

子類：

public class YjwzStockInDtlVO extends TYjwzStockInDtl implements Serializable {

    @Excel(name = "單據(jù)類型")
    @ApiModelProperty(value = "單據(jù)類型：1：采購入庫，2：調(diào)撥入庫")
    @DataBindDict(sourceField = "#djlx", sourceFieldCombination = "lx")
    private String djlxmc;

    @Excel(name = "入庫質(zhì)檢")
    @ApiModelProperty(value = "入庫質(zhì)檢：1：已檢驗入庫，2：未檢驗入庫")
    @DataBindDict(sourceField = "#rkzj", sourceFieldCombination = "zjlx")
    private String rkzjmc;

    @Excel(name = "質(zhì)檢結(jié)果")
    @ApiModelProperty(value = "質(zhì)檢結(jié)果：1：合格，2：不合格")
    @DataBindDict(sourceField = "#zjjg", sourceFieldCombination = "zjjg")
    private String zjjgmc;

    @Excel(name = "存儲期單位")
    @ApiModelProperty(value = "存儲期單位：1：年，2：月")
    @DataBindDict(sourceField = "#ccqdw", sourceFieldCombination = "ccqdw")
    private String ccqdwmc;
}

然后是工具類準備：

1）首先是設(shè)置字體樣式的工具類：

package com.sydata.zt.common.excel;
import cn.afterturn.easypoi.excel.entity.params.ExcelExportEntity;
import cn.afterturn.easypoi.excel.entity.params.ExcelForEachParams;
import cn.afterturn.easypoi.excel.export.styler.IExcelExportStyler;
import org.apache.poi.ss.usermodel.*;
/**
 * @Author xx
 * @Date 2023/12/5 17:37
 * @Description: poi導出excel樣式設(shè)置工具
 * @Version 1.0
 */
public class ExcelStyleUtil implements IExcelExportStyler {
    private static final short STRING_FORMAT = (short) BuiltinFormats.getBuiltinFormat("TEXT");
    private static final short FONT_SIZE_TEN = 9;
    private static final short FONT_SIZE_ELEVEN = 10;
    private static final short FONT_SIZE_TWELVE = 10;
    /**
     * 大標題樣式
     */
    private CellStyle headerStyle;
    /**
     * 每列標題樣式
     */
    private CellStyle titleStyle;
    /**
     * 數(shù)據(jù)行樣式
     */
    private CellStyle styles;
    public ExcelStyleUtil(Workbook workbook){
        this.init(workbook);
    }
    /**
     * 初始化樣式
     * @param workbook
     */
    private void init(Workbook workbook) {
        this.headerStyle = initHeaderStyle(workbook);
        this.titleStyle = initTitleStyle(workbook);
        this.styles = initStyles(workbook);
    }
    /**
     * 初始化大標題樣式
     *
     * @param workbook
     * @return
     */
    private CellStyle initHeaderStyle(Workbook workbook) {
        CellStyle style = getBaseCellStyle(workbook);
        style.setFont(getFont(workbook,FONT_SIZE_ELEVEN,Boolean.TRUE));
        return style;
    }
    /**
     * 初始化小標題樣式
     * @param workbook
     * @return
     */
    private CellStyle initTitleStyle(Workbook workbook) {
        CellStyle style = getBaseCellStyle(workbook);
        style.setFont(getFont(workbook,FONT_SIZE_ELEVEN,Boolean.TRUE));
        return style;
    }
    /**
     * 數(shù)據(jù)行樣式
     * @param workbook
     * @return
     */
    private CellStyle initStyles(Workbook workbook) {
        CellStyle style = getBaseCellStyle(workbook);
        style.setDataFormat(STRING_FORMAT);
        return style;
    }
    /**
     * 大標題樣式
     * @param color
     * @return
     */
    @Override
    public CellStyle getHeaderStyle(short color) {
        return headerStyle;
    }
    /**
     * 每列標題樣式
     * @param color
     * @return
     */
    @Override
    public CellStyle getTitleStyle(short color) {
        return titleStyle;
    }
    /**
     * 數(shù)據(jù)行樣式
     * @param b
     * @param excelExportEntity
     * @return
     */
    @Override
    public CellStyle getStyles(boolean b, ExcelExportEntity excelExportEntity) {
        return styles;
    }
    /**
     * 獲取行樣式方法
     * @param cell
     * @param i
     * @param entity
     * @param o
     * @param o1
     * @return
     */
    @Override
    public CellStyle getStyles(Cell cell, int i, ExcelExportEntity entity, Object o, Object o1) {
        return getStyles(true,entity);
    }
    @Override
    public CellStyle getTemplateStyles(boolean b, ExcelForEachParams excelForEachParams) {
        return null;
    }
    /**
     * 基礎(chǔ)樣式
     * @param workbook
     * @return
     */
    private CellStyle getBaseCellStyle(Workbook workbook) {
        CellStyle style = workbook.createCellStyle();
        //下邊框
        style.setBorderBottom(BorderStyle.THIN);
        //左邊框
        style.setBorderLeft(BorderStyle.THIN);
        //右邊框
        style.setBorderRight(BorderStyle.THIN);
        //上邊框
        style.setBorderTop(BorderStyle.THIN);
        //水平居中
        style.setAlignment(HorizontalAlignment.CENTER);
        //上下居中
        style.setVerticalAlignment(VerticalAlignment.CENTER);
        //設(shè)置自動換行
        style.setWrapText(Boolean.TRUE);
        return style;
    }
    /**
     * 字體樣式
     * @param workbook
     * @param size
     * @param isBold
     * @return
     */
    private Font getFont(Workbook workbook,short size,boolean isBold){
        Font font = workbook.createFont();
        //字體大小
        font.setFontHeightInPoints(size);
        //字體是否加粗
        font.setBold(isBold);
        //設(shè)置字體
//        font.setFontName("");
        return font;
    }
}

2）然后導出excel工具類

package com.sydata.zt.common.excel;
import cn.afterturn.easypoi.excel.ExcelExportUtil;
import cn.afterturn.easypoi.excel.entity.ExportParams;
import cn.afterturn.easypoi.excel.entity.enmus.ExcelType;
import com.alibaba.excel.util.ListUtils;
import com.alibaba.excel.write.metadata.style.WriteCellStyle;
import com.alibaba.excel.write.metadata.style.WriteFont;
import com.alibaba.excel.write.style.HorizontalCellStyleStrategy;
import org.apache.commons.lang3.StringUtils;
import org.apache.poi.ss.formula.functions.T;
import org.apache.poi.ss.usermodel.BorderStyle;
import org.apache.poi.ss.usermodel.HorizontalAlignment;
import org.apache.poi.ss.usermodel.VerticalAlignment;
import org.apache.poi.ss.usermodel.Workbook;
import org.springframework.util.CollectionUtils;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.lang.reflect.Method;
import java.net.URLEncoder;
import java.util.*;
/**
 * @author hm
 * @date 2023/3/14 17:33
 */
public class EasyExcelGeneralUtil {
    /**
     * 設(shè)置response編碼
     */
    public static void setResponseContentType(HttpServletResponse response, String fileName) throws UnsupportedEncodingException {
        response.setContentType("application/vnd.openxmlformats-officedocument.spreadsheetml.sheet");
        response.setCharacterEncoding("utf-8");
        response.setHeader("Content-Disposition", "attachment;filename=" + URLEncoder.encode(fileName, "utf-8") + ".xlsx");
        response.setHeader("Access-Control-Expose-Headers", "Content-Disposition");
    }
    public static void exportExcelByEasyPoi(HttpServletResponse response, String fileName, List<Object> vos, Class<?> classType) throws IOException {
        ExportParams exportParams = new ExportParams();
        // 設(shè)置sheet得名稱
        exportParams.setSheetName(fileName);
        //設(shè)置邊框，字體，字體大小
        exportParams.setStyle(ExcelStyleUtil.class);
        Map<String, Object> map = new HashMap<>();
        // title的參數(shù)為ExportParams類型，目前僅僅在ExportParams中設(shè)置了sheetName
        map.put("title", exportParams);
        // 模版導出對應(yīng)得實體類型的class文件
        map.put("entity", classType);
        // sheet中要填充得數(shù)據(jù)
        map.put("data", vos);
        List<Map<String, Object>> sheetsList = new ArrayList<>();
        sheetsList.add(map);
        //創(chuàng)建excel文件的方法
        Workbook workbook = ExcelExportUtil.exportExcel(sheetsList, ExcelType.HSSF);
        //通過response輸出流直接輸入給客戶端
        ServletOutputStream outputStream = response.getOutputStream();
        workbook.write(outputStream);
        outputStream.flush();
        outputStream.close();
    }
}

準備工作已完成，接下來就可以愉快的導出了：

@SneakyThrows
    @PostMapping("/export")
    @ApiOperation(value = "導出")
    public void export(HttpServletRequest request, HttpServletResponse response,@RequestBody YjwzStockInDTO yjwzStockInDTO){
        request.getSession();
        String fileName = "文件名稱";
        EasyExcelGeneralUtil.setResponseContentType(response,fileName);
		//設(shè)置的分頁最多能導出10000條數(shù)據(jù)
        yjwzStockInDTO.setPageNum(1);
        yjwzStockInDTO.setPageSize(10000);
		//查庫得到需要導出的數(shù)據(jù)
        List<Object> vos = (List<Object>) stockInService.page(yjwzStockInDTO).getRows();
        EasyExcelGeneralUtil.exportExcelByEasyPoi(response,fileName,vos,YjwzStockInVO.class);
    }

好了，完整的過程就是這樣了，直接掉接口導出就可以了。

以上就是java easyPOI實現(xiàn)導出一對多數(shù)據(jù)的詳細內(nèi)容，更多關(guān)于java easyPOI導出數(shù)據(jù)的資料請關(guān)注腳本之家其它相關(guān)文章！

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