YUJT
3 years ago
7 changed files with 371 additions and 28 deletions
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package com.elink.esua.epdc.commons.tools.dto; |
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import lombok.Data; |
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/** |
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* @author songyunpeng |
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* @Description excel导出模板的下拉列表实体 |
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* @create 2020-09-03 |
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*/ |
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@Data |
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public class ExcelSelectionDto { |
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/** |
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* sheet页索引 0开始 |
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*/ |
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private Integer sheetIndex; |
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/** |
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* 区域中第一个单元格的列号 (下标0开始) |
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*/ |
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private Integer firstCol; |
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/** |
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* 区域中最后一个单元格的列号 |
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*/ |
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private Integer lastCol; |
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/** |
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* 下拉数据 |
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*/ |
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private String[] excelSelections; |
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} |
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package com.elink.esua.epdc.commons.tools.utils; |
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import com.elink.esua.epdc.commons.tools.constant.NumConstant; |
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import org.apache.commons.lang3.StringUtils; |
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import javax.imageio.ImageIO; |
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import java.awt.image.BufferedImage; |
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import java.io.ByteArrayOutputStream; |
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import java.io.File; |
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import java.io.FileInputStream; |
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import java.io.IOException; |
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/** |
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* 文件操作工具 |
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* |
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* @author work@yujt.net.cn |
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* @date 2020/5/18 15:27 |
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*/ |
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public class FileUtils { |
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/** |
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* File文件转为byte[] |
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* |
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* @param file |
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* @return byte[] |
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* @author work@yujt.net.cn |
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* @date 2019/9/19 15:56 |
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*/ |
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public static byte[] fileToByteArray(File file) { |
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try { |
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//获取输入流
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FileInputStream fis = new FileInputStream(file); |
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//新的 byte 数组输出流，缓冲区容量1024byte
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ByteArrayOutputStream bos = new ByteArrayOutputStream(1024); |
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//缓存
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byte[] b = new byte[1024]; |
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int n; |
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while ((n = fis.read(b)) != NumConstant.ONE_NEG) { |
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bos.write(b, NumConstant.ZERO, n); |
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} |
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fis.close(); |
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//改变为byte[]
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byte[] data = bos.toByteArray(); |
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bos.close(); |
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return data; |
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} catch (Exception e) { |
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e.printStackTrace(); |
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} |
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return null; |
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} |
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/** |
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* 删除文件夹（强制删除） |
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* |
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* @param path |
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*/ |
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public static void deleteAllFilesOfDir(File path) { |
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if (null != path) { |
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if (!path.exists()) { |
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return; |
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} |
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if (path.isFile()) { |
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boolean result = path.delete(); |
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int tryCount = 0; |
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while (!result && tryCount++ < 10) { |
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System.gc(); // 回收资源
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result = path.delete(); |
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} |
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} |
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File[] files = path.listFiles(); |
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if (null != files) { |
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for (int i = 0; i < files.length; i++) { |
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deleteAllFilesOfDir(files[i]); |
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} |
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} |
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path.delete(); |
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} |
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} |
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/** |
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* BufferedImage文件转为byte[] |
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* |
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* @param bImage 图片 |
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* @param formatName 格式 e.g. png |
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* @return byte[] |
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* @author work@yujt.net.cn |
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* @date 2020/8/7 13:30 |
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*/ |
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public static byte[] imageToBytes(BufferedImage bImage, String formatName) { |
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if (null == bImage || StringUtils.isBlank(formatName)) { |
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return null; |
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} |
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ByteArrayOutputStream out = new ByteArrayOutputStream(); |
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try { |
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ImageIO.write(bImage, formatName, out); |
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} catch (IOException e) { |
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//log.error(e.getMessage());
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} |
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return out.toByteArray(); |
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} |
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} |
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@ -0,0 +1,56 @@ |
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package com.elink.esua.epdc.commons.tools.utils; |
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import com.elink.esua.epdc.commons.tools.exception.RenException; |
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import org.springframework.web.multipart.MultipartFile; |
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import java.io.*; |
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/** |
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* 接收文件转化File |
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* Created by liuhongwei on 2019/6/21. |
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*/ |
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public class StreamUtils { |
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public static File conversionFile(MultipartFile file){ |
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File toFile =null; |
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InputStream ins = null; |
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try { |
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// 转化字节流
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ins = file.getInputStream(); |
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// 获取文件名字
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toFile = new File(file.getOriginalFilename()); |
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// 字节转化文件
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inputStreamToFile(ins, toFile); |
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ins.close(); |
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} catch (IOException e) { |
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new RenException(500,"文件转化失败"); |
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} |
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return toFile; |
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} |
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/** |
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* 流转化 |
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* @param ins file |
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* @return |
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* @author liuhongwei |
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* @date 2019/6/14 14:07 |
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*/ |
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public static void inputStreamToFile(InputStream ins, File file) { |
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try { |
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OutputStream os = new FileOutputStream(file); |
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int bytesRead = 0; |
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byte[] buffer = new byte[8192]; |
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while ((bytesRead = ins.read(buffer, 0, 8192)) != -1) { |
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os.write(buffer, 0, bytesRead); |
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} |
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os.close(); |
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ins.close(); |
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} catch (Exception e) { |
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e.printStackTrace(); |
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} |
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} |
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} |
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