mirror of https://github.com/alibaba/easyexcel
Jiaju Zhuang
5 years ago
28 changed files with 464 additions and 44 deletions
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package com.alibaba.easyexcel.test.demo.read; |
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import java.util.ArrayList; |
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import java.util.List; |
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import java.util.Map; |
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import org.slf4j.Logger; |
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import org.slf4j.LoggerFactory; |
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import com.alibaba.excel.context.AnalysisContext; |
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import com.alibaba.excel.event.AnalysisEventListener; |
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import com.alibaba.excel.metadata.CellData; |
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import com.alibaba.fastjson.JSON; |
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/** |
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* 读取头 |
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* |
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* @author Jiaju Zhuang |
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*/ |
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public class CellDataDemoHeadDataListener extends AnalysisEventListener<CellDataReadDemoData> { |
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private static final Logger LOGGER = LoggerFactory.getLogger(CellDataDemoHeadDataListener.class); |
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/** |
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* 每隔5条存储数据库，实际使用中可以3000条，然后清理list ，方便内存回收 |
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*/ |
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private static final int BATCH_COUNT = 5; |
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List<CellDataReadDemoData> list = new ArrayList<CellDataReadDemoData>(); |
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@Override |
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public void invoke(CellDataReadDemoData data, AnalysisContext context) { |
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LOGGER.info("解析到一条数据:{}", JSON.toJSONString(data)); |
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if (list.size() >= BATCH_COUNT) { |
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saveData(); |
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list.clear(); |
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} |
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} |
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@Override |
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public void doAfterAllAnalysed(AnalysisContext context) { |
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saveData(); |
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LOGGER.info("所有数据解析完成！"); |
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} |
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/** |
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* 加上存储数据库 |
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*/ |
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private void saveData() { |
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LOGGER.info("{}条数据，开始存储数据库！", list.size()); |
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LOGGER.info("存储数据库成功！"); |
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} |
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} |
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package com.alibaba.easyexcel.test.demo.read; |
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import java.util.Date; |
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import com.alibaba.excel.metadata.CellData; |
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import lombok.Data; |
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/** |
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* 基础数据类.这里的排序和excel里面的排序一致 |
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* |
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* @author Jiaju Zhuang |
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**/ |
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@Data |
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public class CellDataReadDemoData { |
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private CellData<String> string; |
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// 这里注意 虽然是日期 但是 类型 存储的是number 因为excel 存储的就是number
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private CellData<Date> date; |
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private CellData<Double> doubleData; |
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// 这里并不一定能完美的获取 有些公式是依赖性的 可能会读不到 这个问题后续会修复
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private CellData<String> formulaValue; |
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} |
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package com.alibaba.easyexcel.test.demo.read; |
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import java.util.ArrayList; |
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import java.util.List; |
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import java.util.Map; |
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import org.slf4j.Logger; |
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import org.slf4j.LoggerFactory; |
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import com.alibaba.excel.context.AnalysisContext; |
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import com.alibaba.excel.event.AnalysisEventListener; |
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import com.alibaba.excel.exception.ExcelDataConvertException; |
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import com.alibaba.fastjson.JSON; |
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/** |
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* 读取转换异常 |
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* |
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* @author Jiaju Zhuang |
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*/ |
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public class DemoExceptionListener extends AnalysisEventListener<ExceptionDemoData> { |
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private static final Logger LOGGER = LoggerFactory.getLogger(DemoExceptionListener.class); |
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/** |
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* 每隔5条存储数据库，实际使用中可以3000条，然后清理list ，方便内存回收 |
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*/ |
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private static final int BATCH_COUNT = 5; |
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List<ExceptionDemoData> list = new ArrayList<ExceptionDemoData>(); |
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/** |
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* 在转换异常 获取其他异常下会调用本接口。抛出异常则停止读取。如果这里不抛出异常则 继续读取下一行。 |
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* |
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* @param exception |
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* @param context |
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* @throws Exception |
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*/ |
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@Override |
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public void onException(Exception exception, AnalysisContext context) { |
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LOGGER.error("解析失败，但是继续解析下一行:{}", exception.getMessage()); |
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// 如果是某一个单元格的转换异常 能获取到具体行号
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// 如果要获取头的信息 配合invokeHeadMap使用
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if (exception instanceof ExcelDataConvertException) { |
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ExcelDataConvertException excelDataConvertException = (ExcelDataConvertException)exception; |
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LOGGER.error("第{}行，第{}列解析异常", excelDataConvertException.getRowIndex(), |
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excelDataConvertException.getColumnIndex()); |
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} |
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} |
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/** |
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* 这里会一行行的返回头 |
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* |
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* @param headMap |
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* @param context |
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*/ |
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@Override |
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public void invokeHeadMap(Map<Integer, String> headMap, AnalysisContext context) { |
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LOGGER.info("解析到一条头数据:{}", JSON.toJSONString(headMap)); |
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} |
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@Override |
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public void invoke(ExceptionDemoData data, AnalysisContext context) { |
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LOGGER.info("解析到一条数据:{}", JSON.toJSONString(data)); |
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if (list.size() >= BATCH_COUNT) { |
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saveData(); |
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list.clear(); |
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} |
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} |
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@Override |
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public void doAfterAllAnalysed(AnalysisContext context) { |
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saveData(); |
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LOGGER.info("所有数据解析完成！"); |
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} |
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/** |
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* 加上存储数据库 |
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*/ |
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private void saveData() { |
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LOGGER.info("{}条数据，开始存储数据库！", list.size()); |
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LOGGER.info("存储数据库成功！"); |
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} |
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} |
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@ -0,0 +1,18 @@
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package com.alibaba.easyexcel.test.demo.read; |
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import java.util.Date; |
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import lombok.Data; |
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|
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/** |
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* 基础数据类.这里的排序和excel里面的排序一致 |
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* |
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* @author Jiaju Zhuang |
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**/ |
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@Data |
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public class ExceptionDemoData { |
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/** |
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* 用日期去接字符串 肯定报错 |
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*/ |
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private Date date; |
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} |
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