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* 这个目前不是很好用，比如有数字就会导致换行。而且长度也不是刚好和实际长度一致。 所以需要精确到刚好列宽的慎用。 当然也可以自己参照 @@ -818,16 +819,20 @@ public class LongestMatchColumnWidthData { *

* poi 自带{@link SXSSFSheet#autoSizeColumn(int)} 对中文支持也不太好。目前没找到很好的算法。 有的话可以推荐下。 * - *

1. 创建excel对应的实体对象 参照{@link DemoData} - *

3. 注册策略{@link LongestMatchColumnWidthStyleStrategy} - *

2. 直接写即可 + *

+ * 1. 创建excel对应的实体对象 参照{@link LongestMatchColumnWidthData} + *

+ * 2. 注册策略{@link LongestMatchColumnWidthStyleStrategy} + *

+ * 3. 直接写即可 */ @Test public void longestMatchColumnWidthWrite() { String fileName = TestFileUtil.getPath() + "longestMatchColumnWidthWrite" + System.currentTimeMillis() + ".xlsx"; // 这里 需要指定写用哪个class去读，然后写到第一个sheet，名字为模板 然后文件流会自动关闭 - EasyExcel.write(fileName, LongestMatchColumnWidthData.class).sheet("模板").doWrite(dataLong()); + EasyExcel.write(fileName, LongestMatchColumnWidthData.class) + .registerWriteHandler(new LongestMatchColumnWidthStyleStrategy()).sheet("模板").doWrite(dataLong()); } private List dataLong() { @@ -843,6 +848,33 @@ public class LongestMatchColumnWidthData { } ``` +### 自定义拦截器（上面几点都不符合但是要对单元格进行操作的参照这个） +##### excel示例 +![img](img/readme/quickstart/write/customHandlerWrite.png) +##### 对象 +参照：[对象](#simpleWriteObject) +##### 代码 +```java + /** + * 下拉，超链接等自定义拦截器（上面几点都不符合但是要对单元格进行操作的参照这个） + *

+ * demo这里实现2点。1. 对第一行第一列的头超链接到:https://github.com/alibaba/easyexcel 2. 对第一列第一行和第二行的数据新增下拉框，显示 测试1 测试2 + *

+ * 1. 创建excel对应的实体对象 参照{@link DemoData} + *

+ * 2. 注册拦截器 {@link CustomCellWriteHandler} {@link CustomSheetWriteHandler} + *

+ * 2. 直接写即可 + */ + @Test + public void customHandlerWrite() { + String fileName = TestFileUtil.getPath() + "customHandlerWrite" + System.currentTimeMillis() + ".xlsx"; + // 这里 需要指定写用哪个class去读，然后写到第一个sheet，名字为模板 然后文件流会自动关闭 + EasyExcel.write(fileName, DemoData.class).registerWriteHandler(new CustomSheetWriteHandler()) + .registerWriteHandler(new CustomCellWriteHandler()).sheet("模板").doWrite(data()); + } +``` + ### web中的写 ##### 示例代码 DEMO代码地址：[https://github.com/alibaba/easyexcel/blob/master/src/test/java/com/alibaba/easyexcel/test/demo/web/WebTest.java](/src/test/java/com/alibaba/easyexcel/test/demo/web/WebTest.java) diff --git a/src/test/java/com/alibaba/easyexcel/test/demo/write/CustomCellWriteHandler.java b/src/test/java/com/alibaba/easyexcel/test/demo/write/CustomCellWriteHandler.java new file mode 100644 index 0000000..bff544a --- /dev/null +++ b/src/test/java/com/alibaba/easyexcel/test/demo/write/CustomCellWriteHandler.java @@ -0,0 +1,45 @@ +package com.alibaba.easyexcel.test.demo.write; + +import org.apache.poi.common.usermodel.HyperlinkType; +import org.apache.poi.ss.usermodel.Cell; +import org.apache.poi.ss.usermodel.CreationHelper; +import org.apache.poi.ss.usermodel.Hyperlink; +import org.apache.poi.ss.usermodel.Row; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +import com.alibaba.excel.metadata.CellData; +import com.alibaba.excel.metadata.Head; +import com.alibaba.excel.write.handler.CellWriteHandler; +import com.alibaba.excel.write.metadata.holder.WriteSheetHolder; +import com.alibaba.excel.write.metadata.holder.WriteTableHolder; + +/** + * 自定义拦截器。对第一行第一列的头超链接到:https://github.com/alibaba/easyexcel + * + * @author Jiaju Zhuang + */ +public class CustomCellWriteHandler implements CellWriteHandler { + + private static final Logger LOGGER = LoggerFactory.getLogger(CustomCellWriteHandler.class); + + @Override + public void beforeCellCreate(WriteSheetHolder writeSheetHolder, WriteTableHolder writeTableHolder, Row row, + Head head, int relativeRowIndex, boolean isHead) { + + } + + @Override + public void afterCellCreate(WriteSheetHolder writeSheetHolder, WriteTableHolder writeTableHolder, CellData cellData, + Cell cell, Head head, int relativeRowIndex, boolean isHead) { + // 这里可以对cell进行任何操作 + LOGGER.info("第{}行，第{}列写入完成。", cell.getRowIndex(), cell.getColumnIndex()); + if (isHead && cell.getColumnIndex() == 0) { + CreationHelper createHelper = writeSheetHolder.getSheet().getWorkbook().getCreationHelper(); + Hyperlink hyperlink = createHelper.createHyperlink(HyperlinkType.URL); + hyperlink.setAddress("https://github.com/alibaba/easyexcel"); + cell.setHyperlink(hyperlink); + } + } + +} diff --git a/src/test/java/com/alibaba/easyexcel/test/demo/write/CustomSheetWriteHandler.java b/src/test/java/com/alibaba/easyexcel/test/demo/write/CustomSheetWriteHandler.java new file mode 100644 index 0000000..fe29045 --- /dev/null +++ b/src/test/java/com/alibaba/easyexcel/test/demo/write/CustomSheetWriteHandler.java @@ -0,0 +1,39 @@ +package com.alibaba.easyexcel.test.demo.write; + +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.util.CellRangeAddressList; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +import com.alibaba.excel.write.handler.SheetWriteHandler; +import com.alibaba.excel.write.metadata.holder.WriteSheetHolder; +import com.alibaba.excel.write.metadata.holder.WriteWorkbookHolder; + +/** + * 自定义拦截器.对第一列第一行和第二行的数据新增下拉框，显示 测试1 测试2 + * + * @author Jiaju Zhuang + */ +public class CustomSheetWriteHandler implements SheetWriteHandler { + + private static final Logger LOGGER = LoggerFactory.getLogger(CustomSheetWriteHandler.class); + + @Override + public void beforeSheetCreate(WriteWorkbookHolder writeWorkbookHolder, WriteSheetHolder writeSheetHolder) { + + } + + @Override + public void afterSheetCreate(WriteWorkbookHolder writeWorkbookHolder, WriteSheetHolder writeSheetHolder) { + LOGGER.info("第{}个Sheet写入成功。", writeSheetHolder.getSheetNo()); + + // 区间设置 第一列第一行和第二行的数据。由于第一行是头，所以第一、二行的数据实际上是第二三行 + CellRangeAddressList cellRangeAddressList = new CellRangeAddressList(1, 2, 0, 0); + DataValidationHelper helper = writeSheetHolder.getSheet().getDataValidationHelper(); + DataValidationConstraint constraint = helper.createExplicitListConstraint(new String[] {"测试1", "测试2"}); + DataValidation dataValidation = helper.createValidation(constraint, cellRangeAddressList); + writeSheetHolder.getSheet().addValidationData(dataValidation); + } +} diff --git a/src/test/java/com/alibaba/easyexcel/test/demo/write/WriteTest.java b/src/test/java/com/alibaba/easyexcel/test/demo/write/WriteTest.java index 482f8f7..e6bc998 100644 --- a/src/test/java/com/alibaba/easyexcel/test/demo/write/WriteTest.java +++ b/src/test/java/com/alibaba/easyexcel/test/demo/write/WriteTest.java @@ -311,11 +311,11 @@ public class WriteTest { * poi 自带{@link SXSSFSheet#autoSizeColumn(int)} 对中文支持也不太好。目前没找到很好的算法。 有的话可以推荐下。 * *

- * 1. 创建excel对应的实体对象 参照{@link DemoData} + * 1. 创建excel对应的实体对象 参照{@link LongestMatchColumnWidthData} *

- * 3. 注册策略{@link LongestMatchColumnWidthStyleStrategy} + * 2. 注册策略{@link LongestMatchColumnWidthStyleStrategy} *

- * 2. 直接写即可 + * 3. 直接写即可 */ @Test public void longestMatchColumnWidthWrite() { @@ -326,6 +326,25 @@ public class WriteTest { .registerWriteHandler(new LongestMatchColumnWidthStyleStrategy()).sheet("模板").doWrite(dataLong()); } + /** + * 下拉，超链接等自定义拦截器（上面几点都不符合但是要对单元格进行操作的参照这个） + *

+ * demo这里实现2点。1. 对第一行第一列的头超链接到:https://github.com/alibaba/easyexcel 2. 对第一列第一行和第二行的数据新增下拉框，显示 测试1 测试2 + *

+ * 1. 创建excel对应的实体对象 参照{@link DemoData} + *

+ * 2. 注册拦截器 {@link CustomCellWriteHandler} {@link CustomSheetWriteHandler} + *

+ * 2. 直接写即可 + */ + @Test + public void customHandlerWrite() { + String fileName = TestFileUtil.getPath() + "customHandlerWrite" + System.currentTimeMillis() + ".xlsx"; + // 这里 需要指定写用哪个class去读，然后写到第一个sheet，名字为模板 然后文件流会自动关闭 + EasyExcel.write(fileName, DemoData.class).registerWriteHandler(new CustomSheetWriteHandler()) + .registerWriteHandler(new CustomCellWriteHandler()).sheet("模板").doWrite(data()); + } + private List dataLong() { List list = new ArrayList(); for (int i = 0; i < 10; i++) {