摘要：
1.使用字符串类型导出来定义自己的转换器。不要使用默认的StringImageConverter。如果图片路径为空或图片路径错误，则相应的内容importjava.io。返回FileNotFoundException；importjava.io。IOException；importjava.io。输入流；importjava.net.Connect异常
1、使用String类型导出 定义自己的Converter，不使用默认的StringImageConverter
如果图片路径为空或者图片路径是错误的，返回相应的内容
import java.io.FileNotFoundException; import java.io.IOException; import java.io.InputStream; import java.net.ConnectException; import java.net.HttpURLConnection; import java.net.URL; import java.net.URLConnection; import com.alibaba.excel.converters.Converter; import com.alibaba.excel.enums.CellDataTypeEnum; import com.alibaba.excel.metadata.CellData; import com.alibaba.excel.metadata.GlobalConfiguration; import com.alibaba.excel.metadata.property.ExcelContentProperty; import com.alibaba.excel.util.IoUtils; import com.njyjz.common.util.Validater; public class MyStringImageConverter implements Converter<String> { @Override public Class supportJavaTypeKey() { return String.class; } @Override public CellDataTypeEnum supportExcelTypeKey() { return CellDataTypeEnum.IMAGE; } @Override public String convertToJavaData(CellData cellData, ExcelContentProperty contentProperty, GlobalConfiguration globalConfiguration) { throw new UnsupportedOperationException("Cannot convert images to string"); } // 图片失效处理 @Override public CellData convertToExcelData(String value, ExcelContentProperty contentProperty, GlobalConfiguration globalConfiguration) throws IOException { InputStream inputStream = null; try { if(Validater.isEmptyString(value)) { return new CellData("图片路径为空"); } URL urlValue = new URL(value); // 开启连接 URLConnection uc = urlValue.openConnection(); // 获取响应状态 int statusCode = ((HttpURLConnection)uc).getResponseCode(); switch (statusCode) { case 200: inputStream = urlValue.openStream(); break; default: return new CellData("无法加载图片"); } byte[] bytes = IoUtils.toByteArray(inputStream); return new CellData(bytes); } catch (ConnectException exception) { return new CellData("无法加载图片"); } catch (FileNotFoundException fileNotFoundException) { return new CellData("无法加载图片"); } finally { if (inputStream != null) { inputStream.close(); } } } }
2、更改图片字段注解
@ExcelProperty(value = "扫描图像", index = 0, converter = MyStringImageConverter.class) private String fileUrl;
3、导出样例
