test: 添加对于用范型表示表头类的写法的测试用例，以及测试用的样例excel文件。

fastexcel-test/src/test/java/cn/idev/excel/test/demo/read/DemoDataAnother.java

@@ -0,0 +1,16 @@
+package cn.idev.excel.test.demo.read;
+
+import lombok.EqualsAndHashCode;
+import lombok.Getter;
+import lombok.Setter;
+import lombok.ToString;
+
+@Getter
+@Setter
+@EqualsAndHashCode
+@ToString
+public class DemoDataAnother {
+    private String strA;
+    private String strB;
+    private String strC;
+}

fastexcel-test/src/test/java/cn/idev/excel/test/demo/read/GenericHeaderTypeDataListener.java

@@ -0,0 +1,39 @@
+package cn.idev.excel.test.demo.read;
+
+import cn.idev.excel.context.AnalysisContext;
+import cn.idev.excel.read.listener.ReadListener;
+import lombok.extern.slf4j.Slf4j;
+
+/**
+ * 针对通过泛型指定头部类型的数据监听器样例
+ * @param <T>
+ */
+@Slf4j
+public class GenericHeaderTypeDataListener<T> implements ReadListener<T> {
+
+    private final Class<T> headerClass;
+
+    private GenericHeaderTypeDataListener(Class<T> headerClass) {
+        this.headerClass = headerClass;
+    }
+
+
+    @Override
+    public void invoke(T data, AnalysisContext context) {
+        log.info("data:{}", data);
+        // 执行业务逻辑
+    }
+
+    @Override
+    public void doAfterAllAnalysed(AnalysisContext context) {
+        // 执行收尾工作
+    }
+
+    public static <T> GenericHeaderTypeDataListener<T> build(Class<T> excelHeaderClass) {
+        return new GenericHeaderTypeDataListener<>(excelHeaderClass);
+    }
+
+    public Class<T> getHeaderClass() {
+        return headerClass;
+    }
+}

fastexcel-test/src/test/java/cn/idev/excel/test/demo/read/ReadTest.java

@@ -110,6 +110,14 @@ private void saveData() {
         }
     }
 
+    @Test
+    public void genericHeaderTypeRead() {
+        String fileName = TestFileUtil.getPath() + "demo" + File.separator + "generic-demo.xlsx";
+        // 模拟通过任何可能的方式获取到的excel头对应的Class<?>对象
+        Class<?> excelHeaderClass = DemoDataAnother.class;
+        EasyExcel.read(fileName, excelHeaderClass, GenericHeaderTypeDataListener.build(excelHeaderClass)).sheet().doRead();
+    }
+
     /**
      * 指定列的下标或者列名
      *