forked from integrated_whb/integrated_whb
294 lines
9.2 KiB
Java
294 lines
9.2 KiB
Java
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package com.zcloud.util;
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import org.apache.commons.logging.Log;
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import org.apache.commons.logging.LogFactory;
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import org.apache.poi.hssf.usermodel.HSSFCell;
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import org.apache.poi.hssf.usermodel.HSSFCellStyle;
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import org.apache.poi.hssf.usermodel.HSSFClientAnchor;
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import org.apache.poi.hssf.usermodel.HSSFPatriarch;
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import org.apache.poi.hssf.usermodel.HSSFRow;
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import org.apache.poi.hssf.usermodel.HSSFSheet;
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import org.apache.poi.hssf.usermodel.HSSFWorkbook;
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import javax.imageio.ImageIO;
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import javax.servlet.http.HttpServletResponse;
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import java.awt.image.BufferedImage;
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import java.io.*;
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import java.lang.reflect.Method;
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import java.net.URL;
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import java.net.URLConnection;
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import java.net.URLEncoder;
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import java.util.*;
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public class ImageExcelUtil {
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private static final Log log = LogFactory.getLog(ImageExcelUtil.class);
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/**
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* excel工具类，可导出带图片或不带图片的数据
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* @date 2024/03/20
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* @param titles 第一行的标题列
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* @param rows 数据行量
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* @param maps 装载导出数据的封装了map的list数据集合，注意：此中的map尽量用本类中的方法 javaBean2Map直接生成，或自己拼接；但需与参数titles[]的标题相关数据对应上
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* @param fileName 导出到本地的文件路径和文件名
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* @param response response
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* @param path 保存到本地的图片地址(我这里是为了删除该目录下的图片，因为我是把网络图片保存到到本地的，如果图片已经是本地图片的话就不需要删除)
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*/
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public static void excelOut(String[] titles, int rows, List<Map<String,Object>> maps, String fileName,
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HttpServletResponse response, String path){
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OutputStream out = null;
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BufferedImage bufferImg = null;
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HSSFWorkbook wb = null;
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try{
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//创建工作sheet
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wb = new HSSFWorkbook();
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HSSFSheet sheet = wb.createSheet(fileName);
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//设置单元格内容水平垂直居中
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HSSFCellStyle style = wb.createCellStyle();
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// style.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);
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// style.setAlignment(HSSFCellStyle.ALIGN_CENTER);
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style.setWrapText(true); //设置内容自动换行
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//画图的顶级管理器，一个sheet只能获取一个（一定要注意这点）
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HSSFPatriarch patriarch = sheet.createDrawingPatriarch();
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HSSFRow row0 = sheet.createRow(0);
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row0.setHeightInPoints(25);
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if (titles.length == 0){
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return ;
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}
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HSSFCell cell = null;
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//第一行、标题行列
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for (int i=0;i<titles.length;i++){
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cell = row0.createCell(i); //第一个单元格
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cell.setCellValue(titles[i]); //设定值
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cell.setCellStyle(style);
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sheet.setColumnWidth(i,6000);
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}
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HSSFRow row = null;
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HSSFCell cellRow = null;
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HSSFClientAnchor anchor = null;
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for (int i=1;i<=rows;i++){
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int cellColumn = 0;
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//创建行
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row = sheet.createRow(i);
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//设置默认行高
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row.setHeightInPoints(25);
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//行数据处理
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Map<String, Object> stringObjectMap = maps.get(i - 1);
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for(Object value : stringObjectMap.keySet()){
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//行单元格
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cellRow = row.createCell(cellColumn);
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cellRow.setCellStyle(style);
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//如果行数据中有图片时候的处理
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if (value.equals("images")){
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File[] file = (File[]) stringObjectMap.get(value);
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if (file == null || file.length == 0){
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cellRow.setCellValue("");
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continue;
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}else{
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row.setHeightInPoints(50);
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for (int x=0;x<file.length;x++){
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ByteArrayOutputStream byteArrayOut = new ByteArrayOutputStream();
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if (x>0){
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cellRow = row.createCell(cellColumn);
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cellRow.setCellStyle(style);
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}
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sheet.setColumnWidth(cellColumn,5000);
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log.error("图片路径"+file[x]);
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bufferImg = ImageIO.read(file[x]);
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ImageIO.write(bufferImg, "jpg", byteArrayOut);
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anchor = new HSSFClientAnchor(0, 0, 1023, 255,(short) cellColumn, i, (short) cellColumn, i);
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// anchor.setAnchorType(3);
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patriarch.createPicture(anchor, wb.addPicture(byteArrayOut.toByteArray(), HSSFWorkbook.PICTURE_TYPE_JPEG));
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cellColumn++;
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}
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continue;
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}
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}
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cellRow.setCellValue(stringObjectMap.get(value).toString());
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cellColumn ++;
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}
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}
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if(wb!=null){
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out = response.getOutputStream();
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response.setContentType("application/x-msdownload");
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response.setHeader("Content-Disposition", "attachment; filename=" + URLEncoder.encode(fileName, "UTF-8") +".xls");
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// 写入excel文件
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wb.write(out);
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}
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}catch (Exception e){
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e.printStackTrace();
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}finally {
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if(out != null){
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try {
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out.close();
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//执行删除生成的图片 TODO
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// File file = new File("E:\\data\\nginxd\\sportsApplets");//输入要删除文件目录的绝对路径
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// File file = new File("/data/nginxd/sportsApplets/excelDeleteImage/");//输入要删除文件目录的绝对路径
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File file = new File(path);//输入要删除文件目录的绝对路径
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deleteFile(file);//由于是保存网络图片到本地服务区，所以画完图片到excel就要删除文件
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} catch (IOException e) {
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e.printStackTrace();
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}
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}
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}
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}
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/**
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* 删除文件夹目录下的所有文件 （我是怕到时候本地服务器图片越来越多，占用资源，所以把图片洗完到excel里面就删除）
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* @date 2021/01/11
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* @param file
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*/
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public static void deleteFile(File file){
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//判断文件不为null或文件目录存在
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if (file == null || !file.exists()){
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log.error("文件删除失败,请检查文件路径是否正确");
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return;
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}
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//取得这个目录下的所有子文件对象
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File[] files = file.listFiles();
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//遍历该目录下的文件对象
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for (File f: files){
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//打印文件名
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String name = file.getName();
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log.error("删除的文件名"+name);
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//判断子目录是否存在子目录,如果是文件则删除
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if (f.isDirectory()){
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deleteFile(f);
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}else {
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f.delete();
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}
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}
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//删除空文件夹 for循环已经把上一层节点的目录清空。
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file.delete();
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}
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/**
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* 保存图片到本地
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* @date 2021/01/11
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* @param imageUrl
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* @param path
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* @return
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*/
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public static String saveFile(String imageUrl, String path){
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String filename = imageUrl.substring(imageUrl.lastIndexOf("/")+1, imageUrl.length());
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log.error("图片===="+filename);
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// Random rand = new Random();
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// int s = rand.nextInt(900)+ 100;
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int s = (int) (Math.random() * 10000);
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log.error("随机数=="+s);
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filename = s + filename; //这里如果有文件名称重复的，就取一个随机数拼接文件名
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File sf= null;
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OutputStream os = null;
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InputStream is = null;
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try {
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// 构造URL
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URL url = new URL(imageUrl);
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// 打开连接
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URLConnection con = url.openConnection();
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//设置请求超时为5s
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con.setConnectTimeout(5*1000);
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// 输入流
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is = con.getInputStream();
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// 1K的数据缓冲
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byte[] bs = new byte[1024];
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// 读取到的数据长度
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int len;
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// 输出的文件流
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// String path = "E:\\data\\nginxd\\sportsApplets";
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// String path = "/data/nginxd/sportsApplets/excelDeleteImage/";
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sf = new File(path);
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if(!sf.exists()){
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sf.mkdirs();
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}
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os = new FileOutputStream(sf.getPath()+"/"+filename);
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// 开始读取
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while ((len = is.read(bs)) != -1) {
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os.write(bs, 0, len);
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}
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} catch (IOException e) {
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e.printStackTrace();
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} finally {
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// 完毕，关闭所有链接
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try {
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if(os!=null){
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os.close();
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}
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if(is!=null){
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is.close();
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}
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} catch (IOException e) {
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e.printStackTrace();
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}
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}
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return sf.getPath()+"/"+filename;
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}
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/**
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* 将java类对象属性-值转换成map的键值对 去除getClass方法属性，以及自定义的file属性放置最后。
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* @date 2021/01/11
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* @param javaBean
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* @return Map
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* @throws Exception
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*/
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public static Map<String, Object> javaBean2Map(Object javaBean) throws Exception {
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Map<String, Object> map = new LinkedHashMap<>();
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//反射的实现方式:第一种
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/*Class<Student> studentClass = Student.class;
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studentClass.getClass();*/
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//第二种实现方式
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Method[] methods = javaBean.getClass().getMethods(); // 获取所有方法
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//第三种实现方式
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/*Class.forName("类路径");*/
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String fileName = null;
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File[] files = null;
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for (Method method : methods) {
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if (method.getName().startsWith("get")) {
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String field = method.getName(); // 拼接属性名
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if (field.contains("getClass")){
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continue;
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}
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field = field.substring(field.indexOf("get") + 3);
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field = field.toLowerCase().charAt(0) + field.substring(1);
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Object value = method.invoke(javaBean, (Object[]) null); // 执行方法
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if (field.equals("images")){
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fileName = field;
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files = (File[]) value;
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continue;
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}
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map.put(field, value);
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}
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}
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if (fileName != null){
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map.put(fileName,files);
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}
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return map;
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}
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/**
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* 递归调用让字符串对中调换
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* @date 2021/01/11
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* @param originStr
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* @return String
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*/
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public static String reverse(String originStr) {
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if(originStr == null || originStr.length() <= 1)
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return originStr;
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String substring = originStr.substring(1);
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String s = reverse(substring) + originStr.charAt(0);
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return s;
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}
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}
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