✨ excel导出支持自定义头信息

ballcat-starters/ballcat-spring-boot-starter-easyexcel/src/main/java/com/hccake/common/excel/SheetWriteHandlerAutoConfiguration.java

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+package com.hccake.common.excel;
+
+import com.alibaba.excel.converters.Converter;
+import com.hccake.common.excel.config.ExcelConfigProperties;
+import com.hccake.common.excel.handler.ManySheetWriteHandler;
+import com.hccake.common.excel.handler.SingleSheetWriteHandler;
+import lombok.RequiredArgsConstructor;
+import org.springframework.beans.factory.ObjectProvider;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+import java.util.List;
+
+/**
+ * @author Hccake 2020/10/28
+ * @version 1.0
+ */
+@RequiredArgsConstructor
+@Configuration(proxyBeanMethods = false)
+public class SheetWriteHandlerAutoConfiguration {
+
+	private final ExcelConfigProperties configProperties;
+
+	private final ObjectProvider<List<Converter<?>>> converterProvider;
+
+	/**
+	 * 单sheet 写入处理器
+	 */
+	@Bean
+	@ConditionalOnMissingBean
+	public SingleSheetWriteHandler singleSheetWriteHandler() {
+		return new SingleSheetWriteHandler(configProperties, converterProvider);
+	}
+
+	/**
+	 * 多sheet 写入处理器
+	 */
+	@Bean
+	@ConditionalOnMissingBean
+	public ManySheetWriteHandler manySheetWriteHandler() {
+		return new ManySheetWriteHandler(configProperties, converterProvider);
+	}
+
+}

ballcat-starters/ballcat-spring-boot-starter-easyexcel/src/main/java/com/hccake/common/excel/head/HeadGenerator.java

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+package com.hccake.common.excel.head;
+
+import com.alibaba.excel.write.builder.ExcelWriterBuilder;
+
+import java.util.List;
+
+/**
+ * Excel头生成器，用于自定义生成头部信息
+ *
+ * @author Hccake 2020/10/27
+ * @version 1.0
+ */
+public interface HeadGenerator {
+
+	/**
+	 * <p>
+	 * 自定义头部信息
+	 * </p>
+	 * 实现类根据数据的class信息，定制Excel头<br/>
+	 * 具体方法使用参考：https://www.yuque.com/easyexcel/doc/write#b4b9de00
+	 * @param writerBuilder ExcelWriterBuilder
+	 * @param clazz 当前sheet的数据类型
+	 * @return List<List<String>> Head头信息
+	 */
+	List<List<String>> head(ExcelWriterBuilder writerBuilder, Class<?> clazz);
+
+}