Excel注解支持多级获取

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

@@ -63,4 +63,9 @@ public @interface Excel
      * 是否导出数据,应对需求:有时我们需要导出一份模板,这是标题需要但内容需要用户手工填写.
      */
     public boolean isExport() default true;
+
+    /**
+     * 另一个类中的属性名称,支持多级获取,以小数点隔开
+     */
+    public String targetAttr() default "";
 }
\ No newline at end of file

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

@@ -6,6 +6,7 @@ import java.io.IOException;
 import java.io.InputStream;
 import java.io.OutputStream;
 import java.lang.reflect.Field;
+import java.lang.reflect.Method;
 import java.text.SimpleDateFormat;
 import java.util.ArrayList;
 import java.util.Date;
@@ -344,21 +345,23 @@ public class ExcelUtil<T>
                                     continue;
                                 }
 
+                                // 用于读取对象中的属性
+                                Object value = getTargetValue(vo, field, attr);
                                 String dateFormat = attr.dateFormat();
                                 String readConverterExp = attr.readConverterExp();
                                 if (StringUtils.isNotEmpty(dateFormat))
                                 {
-                                    cell.setCellValue(DateUtils.parseDateToStr(dateFormat, (Date) field.get(vo)));
+                                    cell.setCellValue(DateUtils.parseDateToStr(dateFormat, (Date) value));
                                 }
                                 else if (StringUtils.isNotEmpty(readConverterExp))
                                 {
-                                    cell.setCellValue(convertByExp(String.valueOf(field.get(vo)), readConverterExp));
+                                    cell.setCellValue(convertByExp(String.valueOf(value), readConverterExp));
                                 }
                                 else
                                 {
                                     cell.setCellType(CellType.STRING);
                                     // 如果数据存在就填入,不存在填入空格.
-                                    cell.setCellValue(StringUtils.isNull(field.get(vo)) ? attr.defaultValue() : field.get(vo) + attr.suffix());
+                                    cell.setCellValue(StringUtils.isNull(value) ? attr.defaultValue() : value + attr.suffix());
                                 }
                             }
                         }
@@ -455,7 +458,7 @@ public class ExcelUtil<T>
         sheet.addValidationData(dataValidationList);
         return sheet;
     }
-    
+
     /**
      * 解析导出值 0=男,1=女,2=未知
      * 
@@ -509,4 +512,55 @@ public class ExcelUtil<T>
         }
         return downloadPath;
     }
+
+    /**
+     * 获取bean中的属性值
+     * 
+     * @param vo 实体对象
+     * @param field 字段
+     * @param excel 注解
+     * @return 最终的属性值
+     * @throws Exception
+     */
+    private Object getTargetValue(T vo, Field field, Excel excel) throws Exception
+    {
+        Object o = field.get(vo);
+        if (StringUtils.isNotEmpty(excel.targetAttr()))
+        {
+            String target = excel.targetAttr();
+            if (target.indexOf(".") > -1)
+            {
+                String[] targets = target.split("[.]");
+                for (String name : targets)
+                {
+                    o = getValue(o, name);
+                }
+            }
+            else
+            {
+                o = getValue(o, target);
+            }
+        }
+        return o;
+    }
+
+    /**
+     * 以类的属性的get方法方法形式获取值
+     * 
+     * @param o
+     * @param name
+     * @return value
+     * @throws Exception
+     */
+    private Object getValue(Object o, String name) throws Exception
+    {
+        if (StringUtils.isNotEmpty(name))
+        {
+            Class<?> clazz = o.getClass();
+            String methodName = "get" + name.substring(0, 1).toUpperCase() + name.substring(1);
+            Method method = clazz.getMethod(methodName);
+            o = method.invoke(o);
+        }
+        return o;
+    }
 }
\ No newline at end of file

ruoyi-system/src/main/java/com/ruoyi/system/domain/SysUser.java

@@ -71,6 +71,7 @@ public class SysUser extends BaseEntity
     private Date loginDate;
 
     /** 部门对象 */
+    @Excel(name = "部门名称", targetAttr = "deptName")
     private SysDept dept;
 
     private List<SysRole> roles;