读取Execl表格,生成对应的JavaBean

本章使用jxl读取Execl表格，当然也可以用poi读取Execl

jxl 与poi 操作Excel区别
JXL: 只想生成一些大数据量可以考虑使用
POI: 功能比较复杂的情况下可以考虑使用,

一、导入依赖

<dependency>
     <groupId>org.jxlsgroupId>
     <artifactId>jxls-jexcelartifactId>
     <version>1.0.6version>
dependency>

二、代码

import jxl.Cell;
import jxl.Sheet;
import jxl.Workbook;
import jxl.read.biff.BiffException;

import java.io.*;
import java.nio.charset.StandardCharsets;

/**
 * @Author: JackHuan
 * @Date: 2020/12/26 14:34
 * @Description:   读取Execl表，生成对应的JavaBean(注意：仅支持.xls)
 * 				   读取后缀为.xlsx前需将文件另存为.xls
 **/
public class ExeclUtil {

    public static void main(String[] args) {

        String inFile = "C:\\Users\\c-wuj7\\Documents\\我接收到的文件\\PV_20201226.xls";
        String sheetName = "V00068";

        //dto
        String outFileDto = "C:\\Users\\c-wuj7\\Desktop\\aa\\dto.java";
        ExeclRange dto = new ExeclRange(5, 12, 0, 1, 5);

        //do
        String outFileDo = "C:\\Users\\c-wuj7\\Desktop\\aa\\do.java";
        ExeclRange domain = new ExeclRange(5, 12,  5);

        //esbDto
        String outFileEsbDto = "C:\\Users\\c-wuj7\\Desktop\\aa\\esbDto.java";
        ExeclRange esbDto = new ExeclRange(5, 12, 5);

        //调用方法依次为,dto,do,esbDto
        readExeclToJava(inFile,sheetName,outFileDto,dto,false);
        readExeclToJava(inFile,sheetName,outFileDo,domain,false);
        readExeclToJava(inFile,sheetName,outFileEsbDto,esbDto,true);

    }

    /**
     *
     * @param inFile        读取的execl表格
     * @param sheetName     工作簿名称
     * @param outFile       输出的java文件
     * @param execlRange    所读取Execl的区域
     * @param flag  true 为 esbDto,  false为 dto、do
     */
    private static void readExeclToJava(String inFile,String sheetName,String outFile,ExeclRange execlRange,boolean flag) {
        Integer startRow = execlRange.startRow;
        Integer endRow = execlRange.endRow;
        Integer jsonProperty = execlRange.jsonProperty;
        Integer apiModelProperty = execlRange.apiModelProperty;
        Integer entity = execlRange.entity;
        Workbook wb = null;
        BufferedWriter out = null;
        try {
            wb = Workbook.getWorkbook(new FileInputStream(inFile));
            out = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(outFile), StandardCharsets.UTF_8));
            //获取工作表
            Sheet sheet = wb.getSheet(sheetName);
            //一个表的总行数
            int rowsTotal = sheet.getRows();
            for (int i = 0 ; i < rowsTotal ; i++){
                //自定义行
                if ( i <= endRow && i >= startRow ){
                    Cell[] cells = sheet.getRow(i);
                    if (jsonProperty != null && apiModelProperty != null ) {
                        //生成dto
                        String first = cells[jsonProperty].getContents();
                        String second = cells[apiModelProperty].getContents();
                        String third = cells[entity].getContents();
                        if (third != null && !"".equals(third) && second != null && !"".equals(second) && first != null && !"".equals(first)){
                            String lowerEntity = third.substring(0, 1).toLowerCase() + third.substring(1);
                            String a = "@JsonProperty(\""+first+"\")";
                            String b = "@ApiModelProperty(\""+second+"\")";
                            String c = "private String "+lowerEntity + ";";
                            out.write(a.toCharArray());
                            out.newLine();
                            out.write(b.toCharArray());
                            out.newLine();
                            out.write(c.toCharArray());
                            out.newLine();
                            out.newLine();
                            out.flush();
                        }
                    }else if(jsonProperty == null && apiModelProperty == null && flag) {
                        //生成esbDto
                        String third = cells[entity].getContents();
                        if (third != null && !"".equals(third)){
                            String lowerEntity = third.substring(0, 1).toLowerCase() + third.substring(1);
                            String upperEntity = third.substring(0, 1).toUpperCase() + third.substring(1);
                            String b = "@JSONField(name = \""+ upperEntity +"\")";
                            String c = "private String "+lowerEntity + ";";
                            out.write(b.toCharArray());
                            out.newLine();
                            out.write(c.toCharArray());
                            out.newLine();
                            out.newLine();
                            out.flush();
                        }
                    }else  {
                        //生成do
                        String third = cells[entity].getContents();
                        if (third != null && !"".equals(third)){
                            String lowerEntity = third.substring(0, 1).toLowerCase() + third.substring(1);
                            String c = "private String "+lowerEntity + ";";
                            out.write(c.toCharArray());
                            out.newLine();
                            out.newLine();
                            out.flush();
                        }

                    }
                }
            }
            System.out.println("successful...");
        } catch (IOException | BiffException e) {
            System.out.println("fail...");
            e.printStackTrace();
        } finally {
            if (out != null){
                try {
                    out.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            if (wb != null){
                wb.close();
            }
        }
    }
}

/**
 *  所读取Execl的区域
 */
class ExeclRange{

    /**
     * startRow   起始行数
     * endRow     终止行数
     * jsonProperty      列位置1
     * apiModelProperty  列位置2
     * entity            列位置3
     */
    Integer startRow;
    Integer endRow;
    Integer jsonProperty;
    Integer apiModelProperty;
    Integer entity;

    public ExeclRange(int startRow, int endRow, int entity) {
        this.startRow = startRow;
        this.endRow = endRow;
        this.entity = entity;
    }

    public ExeclRange(int startRow, int endRow, int jsonProperty, int apiModelProperty, int entity) {
        this.startRow = startRow;
        this.endRow = endRow;
        this.jsonProperty = jsonProperty;
        this.apiModelProperty = apiModelProperty;
        this.entity = entity;
    }
}

参考文章
Java文件写入换行方法