1.字符长度超出限制
java.lang.IllegalArgumentException: The maximum length of cell contents (text) is 32,767 characters
解决方案：
1. 把字符串截取前32767个字符
/*** sqlText 字段导出 excel 时的转化器*/
public class SqlTextConverter implements Converter<String> {@Overridepublic WriteCellData<?> convertToExcelData(WriteConverterContext<String> context) throws Exception {// 截取 SQL 语句前 32767 个字符WriteCellData<String> cellData = new WriteCellData<>();String sqlText = context.getValue();String splitSqlText = sqlText.substring(0,32767);cellData.setData(splitSqlText);cellData.setType(CellDataTypeEnum.STRING);cellData.setStringValue(splitSqlText);return cellData;}
}在实体类上加上注解
@ExcelProperty(value = "SQL 语句", converter = SqlTextConverter.class)@ColumnWidth(100)private String sqlText;
2.项目启动时统一修改最大长度
import org.apache.poi.ss.SpreadsheetVersion;
import org.springframework.boot.CommandLineRunner;
import org.springframework.stereotype.Component;import java.lang.reflect.Field;/*** 统一修改 excel 列最大长度*/
@Component
public class ApplicationCommandLine implements CommandLineRunner {@Overridepublic void run(String... args) throws Exception {SpreadsheetVersion spreadsheetVersion = SpreadsheetVersion.EXCEL2007;Field maxTextLength = spreadsheetVersion.getClass().getDeclaredField("_maxTextLength");maxTextLength.setAccessible(true);maxTextLength.set(spreadsheetVersion, Integer.MAX_VALUE);}
}
)