com.ween.learn.util.excel.ImportExcel.java Source code

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/**
 * Copyright &copy; 2012-2013 <a href="https://github.com/thinkgem/jeesite">JeeSite</a> All rights reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 */
package com.ween.learn.util.excel;

import com.google.common.collect.Lists;
import com.ween.common.utils.Reflections;
import com.ween.learn.util.excel.annotation.ExcelField;
import org.apache.commons.lang3.StringUtils;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.openxml4j.exceptions.InvalidFormatException;
import org.apache.poi.ss.usermodel.*;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.web.multipart.MultipartFile;

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
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.List;

/**
 * Excel?XLS?XLSX??
 * @author ThinkGem
 * @version 2013-03-10
 */
public class ImportExcel {

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

    /**
     * 
     */
    private Workbook wb;

    /**
     * 
     */
    private Sheet sheet;

    /**
     * ?
     */
    private int headerNum;

    /**
     * 
     * @param path ?
     * @param headerNum ???=?+1
     * @throws InvalidFormatException
     * @throws IOException 
     */
    public ImportExcel(String fileName, int headerNum) throws InvalidFormatException, IOException {
        this(new File(fileName), headerNum);
    }

    /**
     * 
     * @param path ?
     * @param headerNum ???=?+1
     * @throws InvalidFormatException
     * @throws IOException 
     */
    public ImportExcel(File file, int headerNum) throws InvalidFormatException, IOException {
        this(file, headerNum, 0);
    }

    /**
     * 
     * @param path 
     * @param headerNum ???=?+1
     * @param sheetIndex ?
     * @throws InvalidFormatException
     * @throws IOException 
     */
    public ImportExcel(String fileName, int headerNum, int sheetIndex) throws InvalidFormatException, IOException {
        this(new File(fileName), headerNum, sheetIndex);
    }

    /**
     * 
     * @param path 
     * @param headerNum ???=?+1
     * @param sheetIndex ?
     * @throws InvalidFormatException
     * @throws IOException 
     */
    public ImportExcel(File file, int headerNum, int sheetIndex) throws InvalidFormatException, IOException {
        this(file.getName(), new FileInputStream(file), headerNum, sheetIndex);
    }

    /**
     * 
     * @param file 
     * @param headerNum ???=?+1
     * @param sheetIndex ?
     * @throws InvalidFormatException
     * @throws IOException 
     */
    public ImportExcel(MultipartFile multipartFile, int headerNum, int sheetIndex)
            throws InvalidFormatException, IOException {
        this(multipartFile.getOriginalFilename(), multipartFile.getInputStream(), headerNum, sheetIndex);
    }

    /**
     * 
     * @param path 
     * @param headerNum ???=?+1
     * @param sheetIndex ?
     * @throws InvalidFormatException
     * @throws IOException 
     */
    public ImportExcel(String fileName, InputStream is, int headerNum, int sheetIndex)
            throws InvalidFormatException, IOException {
        if (StringUtils.isBlank(fileName)) {
            throw new RuntimeException("!");
        } else if (fileName.toLowerCase().endsWith("xls")) {
            this.wb = new HSSFWorkbook(is);
        } else if (fileName.toLowerCase().endsWith("xlsx")) {
            this.wb = new XSSFWorkbook(is);
        } else {
            throw new RuntimeException("??!");
        }
        if (this.wb.getNumberOfSheets() < sheetIndex) {
            throw new RuntimeException("!");
        }
        this.sheet = this.wb.getSheetAt(sheetIndex);
        this.headerNum = headerNum;
        log.debug("Initialize success.");
    }

    /**
     * ?
     * @param rownum
     * @return
     */
    public Row getRow(int rownum) {
        return this.sheet.getRow(rownum);
    }

    /**
     * ???
     * @return
     */
    public int getDataRowNum() {
        return headerNum + 1;
    }

    /**
     * ????
     * @return
     */
    public int getLastDataRowNum() {
        return this.sheet.getLastRowNum() + headerNum;
    }

    /**
     * ???
     * @return
     */
    public int getLastCellNum() {
        return this.getRow(headerNum).getLastCellNum();
    }

    /**
     * ??
     * @param row ?
     * @param column ???
     * @return ?
     */
    public Object getCellValue(Row row, int column) {
        Object val = "";
        try {
            Cell cell = row.getCell(column);
            if (cell != null) {
                if (cell.getCellType() == Cell.CELL_TYPE_NUMERIC) {
                    val = cell.getNumericCellValue();
                } else if (cell.getCellType() == Cell.CELL_TYPE_STRING) {
                    val = cell.getStringCellValue();
                } else if (cell.getCellType() == Cell.CELL_TYPE_FORMULA) {
                    val = cell.getCellFormula();
                } else if (cell.getCellType() == Cell.CELL_TYPE_BOOLEAN) {
                    val = cell.getBooleanCellValue();
                } else if (cell.getCellType() == Cell.CELL_TYPE_ERROR) {
                    val = cell.getErrorCellValue();
                }
            }
        } catch (Exception e) {
            return val;
        }
        return val;
    }

    /**
     * ??
     * @param cls 
     * @param groups 
     */
    public <E> List<E> getDataList(Class<E> cls, int... groups)
            throws InstantiationException, IllegalAccessException {
        List<Object[]> annotationList = Lists.newArrayList();
        // 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() == 2)) {
                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() == 2)) {
                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()));
            };
        });
        //log.debug("Import column count:"+annotationList.size());
        // Get excel data
        List<E> dataList = Lists.newArrayList();
        for (int i = this.getDataRowNum(); i < this.getLastDataRowNum(); i++) {
            E e = (E) cls.newInstance();
            int column = 0;
            Row row = this.getRow(i);
            StringBuilder sb = new StringBuilder();
            for (Object[] os : annotationList) {
                Object val = this.getCellValue(row, column++);
                if (val != null) {
                    ExcelField ef = (ExcelField) os[0];
                    // Get param type and type cast
                    Class<?> valType = Class.class;
                    if (os[1] instanceof Field) {
                        valType = ((Field) os[1]).getType();
                    } else if (os[1] instanceof Method) {
                        Method method = ((Method) os[1]);
                        if ("get".equals(method.getName().substring(0, 3))) {
                            valType = method.getReturnType();
                        } else if ("set".equals(method.getName().substring(0, 3))) {
                            valType = ((Method) os[1]).getParameterTypes()[0];
                        }
                    }
                    //log.debug("Import value type: ["+i+","+column+"] " + valType);
                    try {
                        if (valType == String.class) {
                            String s = String.valueOf(val.toString());
                            if (StringUtils.endsWith(s, ".0")) {
                                val = StringUtils.substringBefore(s, ".0");
                            } else {
                                val = String.valueOf(val.toString());
                            }
                        } else if (valType == Integer.class) {
                            val = Double.valueOf(val.toString()).intValue();
                        } else if (valType == Long.class) {
                            val = Double.valueOf(val.toString()).longValue();
                        } else if (valType == Double.class) {
                            val = Double.valueOf(val.toString());
                        } else if (valType == Float.class) {
                            val = Float.valueOf(val.toString());
                        } else if (valType == Date.class) {
                            val = DateUtil.getJavaDate((Double) val);
                        } else {
                            if (ef.fieldType() != Class.class) {
                                val = ef.fieldType().getMethod("getValue", String.class).invoke(null,
                                        val.toString());
                            } else {
                                val = Class
                                        .forName(this.getClass().getName().replaceAll(
                                                this.getClass().getSimpleName(),
                                                "fieldtype." + valType.getSimpleName() + "Type"))
                                        .getMethod("getValue", String.class).invoke(null, val.toString());
                            }
                        }
                    } catch (Exception ex) {
                        log.info("Get cell value [" + i + "," + column + "] error: " + ex.toString());
                        val = null;
                    }
                    // set entity value
                    if (os[1] instanceof Field) {
                        Reflections.invokeSetter(e, ((Field) os[1]).getName(), val);
                    } else if (os[1] instanceof Method) {
                        String mthodName = ((Method) os[1]).getName();
                        if ("get".equals(mthodName.substring(0, 3))) {
                            mthodName = "set" + StringUtils.substringAfter(mthodName, "get");
                        }
                        Reflections.invokeMethod(e, mthodName, new Class[] { valType }, new Object[] { val });
                    }
                }
                sb.append(val + ", ");
            }
            dataList.add(e);
            log.debug("Read success: [" + i + "] " + sb.toString());
        }
        return dataList;
    }

    //   /**
    //    * 
    //    */
    //   public static void main(String[] args) throws Throwable {
    //      
    //      ImportExcel ei = new ImportExcel("target/export.xlsx", 1);
    //      
    //      for (int i = ei.getDataRowNum(); i < ei.getLastDataRowNum(); i++) {
    //         Row row = ei.getRow(i);
    //         for (int j = 0; j < ei.getLastCellNum(); j++) {
    //            Object val = ei.getCellValue(row, j);
    //            System.out.print(val+", ");
    //         }
    //         System.out.print("\n");
    //      }
    //      
    //   }

}