Excel注解支持Image图片导出

ruoyi-common/ruoyi-common-core/src/main/java/com/ruoyi/common/core/annotation/Excel.java

@@ -144,7 +144,7 @@ public @interface Excel
 
     public enum ColumnType
     {
-        NUMERIC(0), STRING(1);
+        NUMERIC(0), STRING(1), IMAGE(2);
         private final int value;
 
         ColumnType(int value)

ruoyi-common/ruoyi-common-core/src/main/java/com/ruoyi/common/core/utils/file/FileTypeUtils.java

@@ -44,4 +44,33 @@ public class FileTypeUtils
         }
         return fileName.substring(separatorIndex + 1).toLowerCase();
     }
+
+    /**
+     * 获取文件类型
+     * 
+     * @param photoByte 文件字节码
+     * @return 后缀（不含".")
+     */
+    public static String getFileExtendName(byte[] photoByte)
+    {
+        String strFileExtendName = "JPG";
+        if ((photoByte[0] == 71) && (photoByte[1] == 73) && (photoByte[2] == 70) && (photoByte[3] == 56)
+                && ((photoByte[4] == 55) || (photoByte[4] == 57)) && (photoByte[5] == 97))
+        {
+            strFileExtendName = "GIF";
+        }
+        else if ((photoByte[6] == 74) && (photoByte[7] == 70) && (photoByte[8] == 73) && (photoByte[9] == 70))
+        {
+            strFileExtendName = "JPG";
+        }
+        else if ((photoByte[0] == 66) && (photoByte[1] == 77))
+        {
+            strFileExtendName = "BMP";
+        }
+        else if ((photoByte[1] == 80) && (photoByte[2] == 78) && (photoByte[3] == 71))
+        {
+            strFileExtendName = "PNG";
+        }
+        return strFileExtendName;
+    }
 }

ruoyi-common/ruoyi-common-core/src/main/java/com/ruoyi/common/core/utils/file/ImageUtils.java

@@ -0,0 +1,86 @@
+package com.ruoyi.common.core.utils.file;
+
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.InputStream;
+import java.net.URL;
+import java.net.URLConnection;
+import java.util.Arrays;
+import org.apache.poi.util.IOUtils;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * 图片处理工具类
+ *
+ * @author ruoyi
+ */
+public class ImageUtils
+{
+    private static final Logger log = LoggerFactory.getLogger(ImageUtils.class);
+
+    public static byte[] getImage(String imagePath)
+    {
+        InputStream is = getFile(imagePath);
+        try
+        {
+            return IOUtils.toByteArray(is);
+        }
+        catch (Exception e)
+        {
+            log.error("图片加载异常 {}", e);
+            return null;
+        }
+        finally
+        {
+            IOUtils.closeQuietly(is);
+        }
+    }
+
+    public static InputStream getFile(String imagePath)
+    {
+        try
+        {
+            byte[] result = readFile(imagePath);
+            result = Arrays.copyOf(result, result.length);
+            return new ByteArrayInputStream(result);
+        }
+        catch (Exception e)
+        {
+            log.error("获取图片异常 {}", e);
+        }
+        return null;
+    }
+
+    /**
+     * 读取文件为字节数据
+     * 
+     * @param key 地址
+     * @return 字节数据
+     */
+    public static byte[] readFile(String url)
+    {
+        InputStream in = null;
+        ByteArrayOutputStream baos = null;
+        try
+        {
+            // 网络地址
+            URL urlObj = new URL(url);
+            URLConnection urlConnection = urlObj.openConnection();
+            urlConnection.setConnectTimeout(30 * 1000);
+            urlConnection.setReadTimeout(60 * 1000);
+            urlConnection.setDoInput(true);
+            in = urlConnection.getInputStream();
+            return IOUtils.toByteArray(in);
+        }
+        catch (Exception e)
+        {
+            log.error("访问文件异常 {}", e);
+            return null;
+        }
+        finally
+        {
+            IOUtils.closeQuietly(baos);
+        }
+    }
+}

ruoyi-common/ruoyi-common-core/src/main/java/com/ruoyi/common/core/utils/poi/ExcelUtil.java

@@ -20,10 +20,12 @@ import org.apache.poi.ss.usermodel.BorderStyle;
 import org.apache.poi.ss.usermodel.Cell;
 import org.apache.poi.ss.usermodel.CellStyle;
 import org.apache.poi.ss.usermodel.CellType;
+import org.apache.poi.ss.usermodel.ClientAnchor;
 import org.apache.poi.ss.usermodel.DataValidation;
 import org.apache.poi.ss.usermodel.DataValidationConstraint;
 import org.apache.poi.ss.usermodel.DataValidationHelper;
 import org.apache.poi.ss.usermodel.DateUtil;
+import org.apache.poi.ss.usermodel.Drawing;
 import org.apache.poi.ss.usermodel.FillPatternType;
 import org.apache.poi.ss.usermodel.Font;
 import org.apache.poi.ss.usermodel.HorizontalAlignment;
@@ -35,6 +37,7 @@ import org.apache.poi.ss.usermodel.Workbook;
 import org.apache.poi.ss.usermodel.WorkbookFactory;
 import org.apache.poi.ss.util.CellRangeAddressList;
 import org.apache.poi.xssf.streaming.SXSSFWorkbook;
+import org.apache.poi.xssf.usermodel.XSSFClientAnchor;
 import org.apache.poi.xssf.usermodel.XSSFDataValidation;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
@@ -45,6 +48,8 @@ import com.ruoyi.common.core.annotation.Excels;
 import com.ruoyi.common.core.text.Convert;
 import com.ruoyi.common.core.utils.DateUtils;
 import com.ruoyi.common.core.utils.StringUtils;
+import com.ruoyi.common.core.utils.file.FileTypeUtils;
+import com.ruoyi.common.core.utils.file.ImageUtils;
 import com.ruoyi.common.core.utils.reflect.ReflectUtils;
 
 /**
@@ -97,6 +102,11 @@ public class ExcelUtil<T>
     private List<Object[]> fields;
 
     /**
+     * 最大高度
+     */
+    private short maxHeight;
+
+    /**
      * 统计列表
      */
     private Map<Integer, Double> statistics = new HashMap<Integer, Double>();
@@ -233,7 +243,15 @@ public class ExcelUtil<T>
                         }
                         else
                         {
-                            val = Convert.toStr(val);
+                            String dateFormat = field.getAnnotation(Excel.class).dateFormat();
+                            if (StringUtils.isNotEmpty(dateFormat))
+                            {
+                                val = DateUtils.parseDateToStr(dateFormat, (Date) val);
+                            }
+                            else
+                            {
+                                val = Convert.toStr(val);
+                            }
                         }
                     }
                     else if ((Integer.TYPE == fieldType || Integer.class == fieldType) && StringUtils.isNumeric(Convert.toStr(val)))
@@ -512,6 +530,47 @@ public class ExcelUtil<T>
         {
             cell.setCellValue(StringUtils.contains(Convert.toStr(value), ".") ? Convert.toDouble(value) : Convert.toInt(value));
         }
+        else if (ColumnType.IMAGE == attr.cellType())
+        {
+            ClientAnchor anchor = new XSSFClientAnchor(0, 0, 0, 0, (short) cell.getColumnIndex(), cell.getRow().getRowNum(), (short) (cell.getColumnIndex() + 1),
+                    cell.getRow().getRowNum() + 1);
+            String imagePath = Convert.toStr(value);
+            if (StringUtils.isNotEmpty(imagePath))
+            {
+                byte[] data = ImageUtils.getImage(imagePath);
+                getDrawingPatriarch(cell.getSheet()).createPicture(anchor,
+                        cell.getSheet().getWorkbook().addPicture(data, getImageType(data)));
+            }
+        }
+    }
+    
+    /**
+     * 获取画布
+     */
+    public static Drawing<?> getDrawingPatriarch(Sheet sheet)
+    {
+        if (sheet.getDrawingPatriarch() == null)
+        {
+            sheet.createDrawingPatriarch();
+        }
+        return sheet.getDrawingPatriarch();
+    }
+
+    /**
+     * 获取图片类型,设置图片插入类型
+     */
+    public int getImageType(byte[] value)
+    {
+        String type = FileTypeUtils.getFileExtendName(value);
+        if ("JPG".equalsIgnoreCase(type))
+        {
+            return Workbook.PICTURE_TYPE_JPEG;
+        }
+        else if ("PNG".equalsIgnoreCase(type))
+        {
+            return Workbook.PICTURE_TYPE_PNG;
+        }
+        return Workbook.PICTURE_TYPE_JPEG;
     }
 
     /**
@@ -527,7 +586,6 @@ public class ExcelUtil<T>
         {
             // 设置列宽
             sheet.setColumnWidth(column, (int) ((attr.width() + 0.72) * 256));
-            row.setHeight((short) (attr.height() * 20));
         }
         // 如果设置了提示信息则鼠标放上去提示.
         if (StringUtils.isNotEmpty(attr.prompt()))
@@ -552,7 +610,7 @@ public class ExcelUtil<T>
         try
         {
             // 设置行高
-            row.setHeight((short) (attr.height() * 20));
+            row.setHeight(maxHeight);
             // 根据Excel中设置情况决定是否导出,有些情况需要保持为空,希望用户填写这一列.
             if (attr.isExport())
             {
@@ -851,6 +909,21 @@ public class ExcelUtil<T>
             }
         }
         this.fields = this.fields.stream().sorted(Comparator.comparing(objects -> ((Excel) objects[1]).sort())).collect(Collectors.toList());
+        this.maxHeight = getRowHeight();
+    }
+    
+    /**
+     * 根据注解获取最大行高
+     */
+    public short getRowHeight()
+    {
+        double maxHeight = 0;
+        for (Object[] os : this.fields)
+        {
+            Excel excel = (Excel) os[1];
+            maxHeight = maxHeight > excel.height() ? maxHeight : excel.height();
+        }
+        return (short) (maxHeight * 20);
     }
 
     /**