修改cglib问题

src/main/java/com/alibaba/excel/read/listener/ModelBuildEventListener.java

@@ -13,12 +13,11 @@ import com.alibaba.excel.metadata.data.ReadCellData;
 import com.alibaba.excel.metadata.property.ExcelContentProperty;
 import com.alibaba.excel.read.metadata.holder.ReadSheetHolder;
 import com.alibaba.excel.read.metadata.property.ExcelReadHeadProperty;
+import com.alibaba.excel.util.BeanMapUtils;
 import com.alibaba.excel.util.ConverterUtils;
 import com.alibaba.excel.util.FieldUtils;
 import com.alibaba.excel.util.MapUtils;
 
-import net.sf.cglib.beans.BeanMap;
-
 /**
  * Convert to the object the user needs
  *
@@ -115,7 +114,7 @@ public class ModelBuildEventListener implements ReadListener<Map<Integer, ReadCe
                 map.put(FieldUtils.resolveCglibFieldName(excelContentProperty.getField()), value);
             }
         }
-        BeanMap.create(resultModel).putAll(map);
+        BeanMapUtils.create(resultModel).putAll(map);
         return resultModel;
     }
 

src/main/java/com/alibaba/excel/util/BeanMapUtils.java

@@ -0,0 +1,40 @@
+package com.alibaba.excel.util;
+
+import net.sf.cglib.beans.BeanMap;
+import net.sf.cglib.beans.BeanMap.Generator;
+import net.sf.cglib.core.DefaultNamingPolicy;
+
+/**
+ * bean utils
+ *
+ * @author Jiaju Zhuang
+ */
+public class BeanMapUtils {
+
+    /**
+     * Helper method to create a new <code>BeanMap</code>.  For finer
+     * control over the generated instance, use a new instance of
+     * <code>BeanMap.Generator</code> instead of this static method.
+     *
+     * Custom naming policy to prevent null pointer exceptions.
+     * <url>https://github.com/alibaba/easyexcel/issues/2064</url>
+     *
+     * @param bean the JavaBean underlying the map
+     * @return a new <code>BeanMap</code> instance
+     */
+    public static BeanMap create(Object bean) {
+        Generator gen = new Generator();
+        gen.setBean(bean);
+        gen.setNamingPolicy(EasyExcelNamingPolicy.INSTANCE);
+        return gen.create();
+    }
+
+    public static class EasyExcelNamingPolicy extends DefaultNamingPolicy {
+        public static final EasyExcelNamingPolicy INSTANCE = new EasyExcelNamingPolicy();
+
+        @Override
+        protected String getTag() {
+            return "ByEasyExcelCGLIB";
+        }
+    }
+}

src/main/java/com/alibaba/excel/util/ClassUtils.java

@@ -27,7 +27,7 @@ import com.alibaba.excel.write.metadata.holder.WriteHolder;
  **/
 public class ClassUtils {
 
-    private static final Map<Class<?>, SoftReference<FieldCache>> FIELD_CACHE = new ConcurrentHashMap<>();
+    public static final Map<Class<?>, SoftReference<FieldCache>> FIELD_CACHE = new ConcurrentHashMap<>();
 
     public static void declaredFields(Class<?> clazz, Map<Integer, Field> sortedAllFiledMap,
         Map<Integer, Field> indexFiledMap, Map<String, Field> ignoreMap, Boolean convertAllFiled,

src/main/java/com/alibaba/excel/write/executor/ExcelWriteAddExecutor.java

@@ -13,6 +13,7 @@ import com.alibaba.excel.enums.HeadKindEnum;
 import com.alibaba.excel.metadata.Head;
 import com.alibaba.excel.metadata.data.WriteCellData;
 import com.alibaba.excel.metadata.property.ExcelContentProperty;
+import com.alibaba.excel.util.BeanMapUtils;
 import com.alibaba.excel.util.ClassUtils;
 import com.alibaba.excel.util.FieldUtils;
 import com.alibaba.excel.util.WorkBookUtil;
@@ -120,7 +121,7 @@ public class ExcelWriteAddExecutor extends AbstractExcelWriteExecutor {
     private void addJavaObjectToExcel(Object oneRowData, Row row, int relativeRowIndex,
         Map<Integer, Field> sortedAllFiledMap) {
         WriteHolder currentWriteHolder = writeContext.currentWriteHolder();
-        BeanMap beanMap = BeanMap.create(oneRowData);
+        BeanMap beanMap = BeanMapUtils.create(oneRowData);
         Set<String> beanMapHandledSet = new HashSet<String>();
         int cellIndex;
         // If it's a class it needs to be cast by type

src/main/java/com/alibaba/excel/write/executor/ExcelWriteFillExecutor.java

@@ -16,6 +16,7 @@ import com.alibaba.excel.enums.WriteTemplateAnalysisCellTypeEnum;
 import com.alibaba.excel.exception.ExcelGenerateException;
 import com.alibaba.excel.metadata.data.WriteCellData;
 import com.alibaba.excel.metadata.property.ExcelContentProperty;
+import com.alibaba.excel.util.BeanMapUtils;
 import com.alibaba.excel.util.FieldUtils;
 import com.alibaba.excel.util.StringUtils;
 import com.alibaba.excel.util.WriteHandlerUtils;
@@ -24,7 +25,6 @@ import com.alibaba.excel.write.metadata.fill.FillConfig;
 import com.alibaba.excel.write.metadata.fill.FillWrapper;
 import com.alibaba.excel.write.metadata.holder.WriteSheetHolder;
 
-import net.sf.cglib.beans.BeanMap;
 import org.apache.commons.collections4.CollectionUtils;
 import org.apache.poi.ss.usermodel.Cell;
 import org.apache.poi.ss.usermodel.CellStyle;
@@ -186,7 +186,7 @@ public class ExcelWriteFillExecutor extends AbstractExcelWriteExecutor {
         if (oneRowData instanceof Map) {
             dataMap = (Map)oneRowData;
         } else {
-            dataMap = BeanMap.create(oneRowData);
+            dataMap = BeanMapUtils.create(oneRowData);
         }
         WriteSheetHolder writeSheetHolder = writeContext.writeSheetHolder();
         Map<String, ExcelContentProperty> fieldNameContentPropertyMap =

src/test/java/com/alibaba/easyexcel/test/temp/Xls03Test.java

@@ -3,14 +3,15 @@ package com.alibaba.easyexcel.test.temp;
 import java.util.List;
 
 import com.alibaba.excel.EasyExcel;
+import com.alibaba.excel.util.BeanMapUtils;
 import com.alibaba.fastjson.JSON;
 
+import net.sf.cglib.beans.BeanMap;
 import net.sf.cglib.core.DebuggingClassWriter;
 import org.junit.Ignore;
 import org.junit.Test;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
-import org.springframework.cglib.beans.BeanMap;
 
 /**
  * 临时测试
@@ -40,7 +41,7 @@ public class Xls03Test {
         //camlData.setAEst("test3");
         //camlData.setTEST("test4");
 
-        BeanMap beanMap = BeanMap.create(camlData);
+        BeanMap beanMap = BeanMapUtils.create(camlData);
 
         LOGGER.info("test:{}", beanMap.get("test"));
         LOGGER.info("test:{}", beanMap.get("Test"));

src/test/java/com/alibaba/easyexcel/test/temp/simple/Wirte.java

@@ -10,12 +10,12 @@ import com.alibaba.easyexcel.test.demo.write.DemoData;
 import com.alibaba.easyexcel.test.util.TestFileUtil;
 import com.alibaba.excel.EasyExcel;
 import com.alibaba.excel.ExcelWriter;
+import com.alibaba.excel.util.BeanMapUtils;
 import com.alibaba.excel.write.metadata.WriteSheet;
 import com.alibaba.excel.write.metadata.WriteTable;
 import com.alibaba.fastjson.JSON;
 
 import lombok.extern.slf4j.Slf4j;
-import net.sf.cglib.beans.BeanMap;
 import org.junit.Ignore;
 import org.junit.Test;
 import org.slf4j.Logger;
@@ -35,7 +35,7 @@ public class Wirte {
     public void simpleWrite1() {
         LargeData ss = new LargeData();
         ss.setStr23("ttt");
-        Map map = BeanMap.create(ss);
+        Map map = BeanMapUtils.create(ss);
         System.out.println(map.containsKey("str23"));
         System.out.println(map.containsKey("str22"));
         System.out.println(map.get("str23"));