com.aistor.common.utils.excel.ExportExcel.java Source code

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/**
 * Copyright &copy; 2012-2013 <a href="https://github.com/Dopas/dopas">Dopas</a> All rights reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 */
package com.aistor.common.utils.excel;

import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.util.Collections;
import java.util.Comparator;
import java.util.Date;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import javax.servlet.http.HttpServletResponse;

import org.apache.commons.lang3.StringUtils;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.CellStyle;
import org.apache.poi.ss.usermodel.Comment;
import org.apache.poi.ss.usermodel.DataFormat;
import org.apache.poi.ss.usermodel.Font;
import org.apache.poi.ss.usermodel.IndexedColors;
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.ss.util.CellRangeAddress;
import org.apache.poi.xssf.streaming.SXSSFWorkbook;
import org.apache.poi.xssf.usermodel.XSSFClientAnchor;
import org.apache.poi.xssf.usermodel.XSSFRichTextString;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.google.common.collect.Lists;
import com.aistor.common.utils.Encodes;
import com.aistor.common.utils.Reflections;
import com.aistor.common.utils.excel.annotation.ExcelField;
import com.aistor.modules.sys.utils.DictUtils;

/**
 * ExcelXLSX?????
 * @author Zaric
 * @version 2013-03-10
 */
public class ExportExcel {

    private static Logger log = LoggerFactory.getLogger(ExportExcel.class);

    /**
     * 
     */
    private SXSSFWorkbook wb;

    /**
     * 
     */
    private Sheet sheet;

    /**
     * ?
     */
    private Map<String, CellStyle> styles;

    /**
     * ??
     */
    private int rownum;

    /**
     * Object[]{ ExcelField, Field/Method }
     */
    List<Object[]> annotationList = Lists.newArrayList();

    /**
     * 
     * @param title ?
     * @param cls annotation.ExportField?
     */
    public ExportExcel(String title, Class<?> cls) {
        this(title, cls, 1);
    }

    /**
     * 
     * @param title ?
     * @param cls annotation.ExportField?
     * @param type 1:?2?
     * @param groups 
     */
    public ExportExcel(String title, Class<?> cls, int type, int... groups) {
        // Get annotation field 
        Field[] fs = cls.getDeclaredFields();
        for (Field f : fs) {
            ExcelField ef = f.getAnnotation(ExcelField.class);
            if (ef != null && (ef.type() == 0 || ef.type() == type)) {
                if (groups != null && groups.length > 0) {
                    boolean inGroup = false;
                    for (int g : groups) {
                        if (inGroup) {
                            break;
                        }
                        for (int efg : ef.groups()) {
                            if (g == efg) {
                                inGroup = true;
                                annotationList.add(new Object[] { ef, f });
                                break;
                            }
                        }
                    }
                } else {
                    annotationList.add(new Object[] { ef, f });
                }
            }
        }
        // Get annotation method
        Method[] ms = cls.getDeclaredMethods();
        for (Method m : ms) {
            ExcelField ef = m.getAnnotation(ExcelField.class);
            if (ef != null && (ef.type() == 0 || ef.type() == type)) {
                if (groups != null && groups.length > 0) {
                    boolean inGroup = false;
                    for (int g : groups) {
                        if (inGroup) {
                            break;
                        }
                        for (int efg : ef.groups()) {
                            if (g == efg) {
                                inGroup = true;
                                annotationList.add(new Object[] { ef, m });
                                break;
                            }
                        }
                    }
                } else {
                    annotationList.add(new Object[] { ef, m });
                }
            }
        }
        // Field sorting
        Collections.sort(annotationList, new Comparator<Object[]>() {
            public int compare(Object[] o1, Object[] o2) {
                return new Integer(((ExcelField) o1[0]).sort()).compareTo(new Integer(((ExcelField) o2[0]).sort()));
            };
        });
        // Initialize
        List<String> headerList = Lists.newArrayList();
        for (Object[] os : annotationList) {
            String t = ((ExcelField) os[0]).title();
            // ?
            if (type == 1) {
                String[] ss = StringUtils.split(t, "**", 2);
                if (ss.length == 2) {
                    t = ss[0];
                }
            }
            headerList.add(t);
        }
        initialize(title, headerList);
    }

    /**
     * 
     * @param title ?
     * @param headers 
     */
    public ExportExcel(String title, String[] headers) {
        initialize(title, Lists.newArrayList(headers));
    }

    /**
     * 
     * @param title ?
     * @param headerList 
     */
    public ExportExcel(String title, List<String> headerList) {
        initialize(title, headerList);
    }

    /**
     * ?
     * @param title ?
     * @param headerList 
     */
    private void initialize(String title, List<String> headerList) {
        this.wb = new SXSSFWorkbook(500);
        this.sheet = wb.createSheet("Export");
        this.styles = createStyles(wb);
        // Create title
        if (StringUtils.isNotBlank(title)) {
            Row titleRow = sheet.createRow(rownum++);
            titleRow.setHeightInPoints(30);
            Cell titleCell = titleRow.createCell(0);
            titleCell.setCellStyle(styles.get("title"));
            titleCell.setCellValue(title);
            sheet.addMergedRegion(new CellRangeAddress(titleRow.getRowNum(), titleRow.getRowNum(),
                    titleRow.getRowNum(), headerList.size() - 1));
        }
        // Create header
        if (headerList == null) {
            throw new RuntimeException("headerList not null!");
        }
        Row headerRow = sheet.createRow(rownum++);
        headerRow.setHeightInPoints(16);
        for (int i = 0; i < headerList.size(); i++) {
            Cell cell = headerRow.createCell(i);
            cell.setCellStyle(styles.get("header"));
            String[] ss = StringUtils.split(headerList.get(i), "**", 2);
            if (ss.length == 2) {
                cell.setCellValue(ss[0]);
                Comment comment = this.sheet.createDrawingPatriarch()
                        .createCellComment(new XSSFClientAnchor(0, 0, 0, 0, (short) 3, 3, (short) 5, 6));
                comment.setString(new XSSFRichTextString(ss[1]));
                cell.setCellComment(comment);
            } else {
                cell.setCellValue(headerList.get(i));
            }
            sheet.autoSizeColumn(i);
        }
        for (int i = 0; i < headerList.size(); i++) {
            int colWidth = sheet.getColumnWidth(i) * 2;
            sheet.setColumnWidth(i, colWidth < 3000 ? 3000 : colWidth);
        }
        log.debug("Initialize success.");
    }

    /**
     * ?
     * @param wb 
     * @return ?
     */
    private Map<String, CellStyle> createStyles(Workbook wb) {
        Map<String, CellStyle> styles = new HashMap<String, CellStyle>();

        CellStyle style = wb.createCellStyle();
        style.setAlignment(CellStyle.ALIGN_CENTER);
        style.setVerticalAlignment(CellStyle.VERTICAL_CENTER);
        Font titleFont = wb.createFont();
        titleFont.setFontHeightInPoints((short) 18);
        titleFont.setBoldweight(Font.BOLDWEIGHT_BOLD);
        style.setFont(titleFont);
        styles.put("title", style);

        style = wb.createCellStyle();
        style.setVerticalAlignment(CellStyle.VERTICAL_CENTER);
        style.setBorderRight(CellStyle.BORDER_THIN);
        style.setRightBorderColor(IndexedColors.GREY_50_PERCENT.getIndex());
        style.setBorderLeft(CellStyle.BORDER_THIN);
        style.setLeftBorderColor(IndexedColors.GREY_50_PERCENT.getIndex());
        style.setBorderTop(CellStyle.BORDER_THIN);
        style.setTopBorderColor(IndexedColors.GREY_50_PERCENT.getIndex());
        style.setBorderBottom(CellStyle.BORDER_THIN);
        style.setBottomBorderColor(IndexedColors.GREY_50_PERCENT.getIndex());
        styles.put("data", style);

        style = wb.createCellStyle();
        style.cloneStyleFrom(styles.get("data"));
        //      style.setWrapText(true);
        style.setAlignment(CellStyle.ALIGN_CENTER);
        style.setFillForegroundColor(IndexedColors.GREY_50_PERCENT.getIndex());
        style.setFillPattern(CellStyle.SOLID_FOREGROUND);
        Font headerFont = wb.createFont();
        headerFont.setFontHeightInPoints((short) 11);
        headerFont.setColor(IndexedColors.WHITE.getIndex());
        style.setFont(headerFont);
        styles.put("header", style);

        return styles;
    }

    /**
     * 
     * @return 
     */
    public Row addRow() {
        return sheet.createRow(rownum++);
    }

    /**
     * ?
     * @param row 
     * @param column ?
     * @param val 
     * @return ?
     */
    public Cell addCell(Row row, int column, Object val) {
        return this.addCell(row, column, val, 0, Class.class);
    }

    /**
     * ?
     * @param row 
     * @param column ?
     * @param val 
     * @param align ??1?23??
     * @return ?
     */
    public Cell addCell(Row row, int column, Object val, int align, Class<?> fieldType) {
        Cell cell = row.createCell(column);
        CellStyle style = wb.createCellStyle();
        style.cloneStyleFrom(styles.get("data"));
        if (align == 1) {
            style.setAlignment(CellStyle.ALIGN_LEFT);
        } else if (align == 2) {
            style.setAlignment(CellStyle.ALIGN_CENTER);
        } else if (align == 3) {
            style.setAlignment(CellStyle.ALIGN_RIGHT);
        }
        try {
            if (val == null) {
                cell.setCellValue("");
            } else if (val instanceof String) {
                cell.setCellValue((String) val);
            } else if (val instanceof Integer) {
                cell.setCellValue((Integer) val);
            } else if (val instanceof Long) {
                cell.setCellValue((Long) val);
            } else if (val instanceof Double) {
                cell.setCellValue((Double) val);
            } else if (val instanceof Float) {
                cell.setCellValue((Float) val);
            } else if (val instanceof Date) {
                DataFormat format = wb.createDataFormat();
                style.setDataFormat(format.getFormat("yyyy-MM-dd"));
                cell.setCellValue((Date) val);
            } else {
                if (fieldType != Class.class) {
                    cell.setCellValue((String) fieldType.getMethod("setValue", Object.class).invoke(null, val));
                } else {
                    cell.setCellValue((String) Class
                            .forName(this.getClass().getName().replaceAll(this.getClass().getSimpleName(),
                                    "fieldtype." + val.getClass().getSimpleName() + "Type"))
                            .getMethod("setValue", Object.class).invoke(null, val));
                }
            }
        } catch (Exception ex) {
            log.info("Set cell value [" + row.getRowNum() + "," + column + "] error: " + ex.toString());
            cell.setCellValue(val.toString());
        }
        cell.setCellStyle(style);
        return cell;
    }

    /**
     * ?annotation.ExportField?
     * @return list ?
     */
    public <E> ExportExcel setDataList(List<E> list) {
        for (E e : list) {
            int colunm = 0;
            Row row = this.addRow();
            StringBuilder sb = new StringBuilder();
            for (Object[] os : annotationList) {
                ExcelField ef = (ExcelField) os[0];
                Object val = null;
                // Get entity value
                try {
                    if (StringUtils.isNotBlank(ef.value())) {
                        val = Reflections.invokeGetter(e, ef.value());
                    } else {
                        if (os[1] instanceof Field) {
                            val = Reflections.invokeGetter(e, ((Field) os[1]).getName());
                        } else if (os[1] instanceof Method) {
                            val = Reflections.invokeMethod(e, ((Method) os[1]).getName(), new Class[] {},
                                    new Object[] {});
                        }
                    }
                    // If is dict, get dict label
                    if (StringUtils.isNotBlank(ef.dictType())) {
                        val = DictUtils.getDictLabel(val == null ? "" : val.toString(), ef.dictType(), "");
                    }
                } catch (Exception ex) {
                    // Failure to ignore
                    log.info(ex.toString());
                    val = "";
                }
                this.addCell(row, colunm++, val, ef.align(), ef.fieldType());
                sb.append(val + ", ");
            }
            log.debug("Write success: [" + row.getRowNum() + "] " + sb.toString());
        }
        return this;
    }

    /**
     * ??
     * @param os ??
     */
    public ExportExcel write(OutputStream os) throws IOException {
        wb.write(os);
        return this;
    }

    /**
     * 
     * @param fileName ??
     */
    public ExportExcel write(HttpServletResponse response, String fileName) throws IOException {
        response.reset();
        response.setContentType("application/octet-stream; charset=utf-8");
        response.setHeader("Content-Disposition", "attachment; filename=" + Encodes.urlEncode(fileName));
        write(response.getOutputStream());
        return this;
    }

    /**
     * 
     * @param fileName ??
     */
    public ExportExcel writeFile(String name) throws FileNotFoundException, IOException {
        FileOutputStream os = new FileOutputStream(name);
        this.write(os);
        return this;
    }

    /**
     * ?
     */
    public ExportExcel dispose() {
        wb.dispose();
        return this;
    }

    //   /**
    //    * 
    //    */
    //   public static void main(String[] args) throws Throwable {
    //      
    //      List<String> headerList = Lists.newArrayList();
    //      for (int i = 1; i <= 10; i++) {
    //         headerList.add(""+i);
    //      }
    //      
    //      List<String> dataRowList = Lists.newArrayList();
    //      for (int i = 1; i <= headerList.size(); i++) {
    //         dataRowList.add("?"+i);
    //      }
    //      
    //      List<List<String>> dataList = Lists.newArrayList();
    //      for (int i = 1; i <=5000; i++) {
    //         dataList.add(dataRowList);
    //      }
    //       
    //      ExportExcel ee = new ExportExcel("", headerList);
    //      
    //      for (int i = 0; i < dataList.size(); i++) {
    //         Row row = ee.addRow();
    //         for (int j = 0; j < dataList.get(i).size(); j++) {
    //            ee.addCell(row, j, dataList.get(i).get(j));
    //         }
    //      }
    //      
    //      ee.writeFile("target/export.xlsx");
    //
    //      ee.dispose();
    //      
    //   }

}