QingLong/src/main/java/UnitTest/TestExportExcel.java

package UnitTest;

import com.jfinal.plugin.activerecord.ActiveRecordPlugin;
import com.jfinal.plugin.activerecord.Db;
import com.jfinal.plugin.activerecord.Record;
import com.jfinal.plugin.activerecord.dialect.PostgreSqlDialect;
import com.jfinal.plugin.hikaricp.HikariCpPlugin;
import org.apache.poi.ss.usermodel.*;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;

import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

public class TestExportExcel {
    public static void main(String[] args) {
        //读取库
        HikariCpPlugin hp = new HikariCpPlugin("jdbc:postgresql://10.10.14.71:5432/szjz_db", "postgres",
                "DsideaL147258369", "org.postgresql.Driver");
        hp.start();

        ActiveRecordPlugin arp = new ActiveRecordPlugin(hp);
        arp.setDialect(new PostgreSqlDialect());
        arp.start();
        //表名
        String table_name = "ds_job_5_0";
        //读取表的结构信息
        String sql = "select column_name,excel_column_idx,original_name from t_collect_mapping where table_name= ?";
        List<Record> list = Db.find(sql, table_name);
        Map<Integer, Record> _map = new HashMap<>();
        for (Record record : list) {
            Record r = new Record();
            r.set("column_name", record.getStr("column_name"));
            r.set("original_name", record.getStr("original_name"));
            _map.put(record.getInt("excel_column_idx") + 1, r);
        }
        //读取表的注释
        sql = "SELECT obj_description(?::regclass, 'pg_class') as memo";
        String memo = Db.findFirst(sql, table_name).getStr("memo");

        //获取数据
        sql = "select t1.*,t2.org_name as bureau_name from " + table_name + " as t1 inner join t_base_organization as t2 on t1.bureau_id=t2.bureau_id";
        List<Record> data = Db.find(sql);


        // 创建工作簿和工作表
        Workbook workbook = new XSSFWorkbook();
        Sheet sheet = workbook.createSheet(memo);

        // 创建单元格样式对象
        CellStyle headerStyle = workbook.createCellStyle();
        // 设置水平居中
        headerStyle.setAlignment(HorizontalAlignment.CENTER);
        // 设置垂直居中
        headerStyle.setVerticalAlignment(VerticalAlignment.CENTER);
        // 设置边框样式
        headerStyle.setBorderTop(BorderStyle.THIN);
        headerStyle.setBorderBottom(BorderStyle.THIN);
        headerStyle.setBorderLeft(BorderStyle.THIN);
        headerStyle.setBorderRight(BorderStyle.THIN);

        // 创建字体对象并设置字体颜色为白色
        Font font = workbook.createFont();
        font.setFontHeightInPoints((short) 14);
        font.setBold(true);
        font.setFontName("黑体");
        font.setColor(IndexedColors.BLACK.getIndex());
        // 设置背景色为浅蓝色 #d2f4f2
        headerStyle.setFillForegroundColor(IndexedColors.LIGHT_BLUE.getIndex());
        headerStyle.setFillPattern(FillPatternType.SOLID_FOREGROUND);
        // 将字体应用于样式
        headerStyle.setFont(font);

        // 在第一行创建单元格并设置样式
        Row headerRow = sheet.createRow(0);
        Cell headerCell = headerRow.createCell(0);
        headerCell.setCellValue("单位");
        headerCell.setCellStyle(headerStyle);
        for (int i = 0; i < list.size(); i++) {
            headerCell = headerRow.createCell(i + 1);
            headerCell.setCellValue(_map.get(i + 1).getStr("original_name"));
            headerCell.setCellStyle(headerStyle);
        }

        // 创建字体对象并设置字体大小为12
        font = workbook.createFont();
        font.setFontHeightInPoints((short) 12);

        // 创建单元格样式对象并将字体应用于样式
        CellStyle style = workbook.createCellStyle();
        style.setFont(font);
        // 设置行高度为28
        sheet.setDefaultRowHeightInPoints(28);
        // 设置每个单元格的宽度为30
        sheet.setDefaultColumnWidth(30);
        // 设置边框样式
        style.setBorderTop(BorderStyle.THIN);
        style.setBorderBottom(BorderStyle.THIN);
        style.setBorderLeft(BorderStyle.THIN);
        style.setBorderRight(BorderStyle.THIN);
        // 设置水平居中
        style.setAlignment(HorizontalAlignment.CENTER);
        // 设置垂直居中
        style.setVerticalAlignment(VerticalAlignment.CENTER);

        // 填充数据集的其余行
        for (int i = 1; i <= data.size(); i++) {
            Row row = sheet.createRow(i);
            Record record = data.get(i - 1);
            Cell cell = row.createCell(0);
            cell.setCellValue(record.getStr("bureau_name"));
            cell.setCellStyle(style);
            for (int j = 0; j < list.size(); j++) {
                cell = row.createCell(j + 1);
                cell.setCellValue(record.getStr(_map.get(j + 1).getStr("column_name")));
                cell.setCellStyle(style);
            }
        }

        // 保存Excel文件
        try (FileOutputStream outputStream = new FileOutputStream("c:/example.xlsx")) {
            workbook.write(outputStream);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}