v1.0

pom.xml

@@ -27,6 +27,16 @@
     </properties>
 
     <dependencies>
+        <dependency>
+            <groupId>org.apache.poi</groupId>
+            <artifactId>poi</artifactId>
+            <version>4.0.1</version>
+        </dependency>
+        <dependency>
+            <groupId>org.apache.poi</groupId>
+            <artifactId>poi-ooxml</artifactId>
+            <version>4.0.1</version>
+        </dependency>
         <dependency>
             <groupId>io.springfox</groupId>
             <artifactId>springfox-swagger2</artifactId>

src/main/java/com/zjty/inspect/entity/ExcelDataVo.java

+package com.zjty.inspect.entity;
+
+import lombok.AllArgsConstructor;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+@Data
+@AllArgsConstructor
+@NoArgsConstructor
+public class ExcelDataVo {
+
+    private String name;
+}

src/main/java/com/zjty/inspect/utils/ExcelReader.java

+package com.zjty.inspect.utils;
+
+import com.zjty.inspect.entity.ExcelDataVo;
+import org.apache.poi.hssf.usermodel.HSSFWorkbook;
+import org.apache.poi.ss.usermodel.Cell;
+import org.apache.poi.ss.usermodel.Row;
+import org.apache.poi.ss.usermodel.Sheet;
+import org.apache.poi.ss.usermodel.Workbook;
+import org.apache.poi.xssf.usermodel.XSSFWorkbook;
+
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.text.DecimalFormat;
+import java.util.ArrayList;
+import java.util.List;
+
+public class ExcelReader {
+    private static final String XLS = "xls";
+    private static final String XLSX = "xlsx";
+
+    /**
+     * 根据文件后缀名类型获取对应的工作簿对象
+     * @param inputStream 读取文件的输入流
+     * @param fileType 文件后缀名类型（xls或xlsx）
+     * @return 包含文件数据的工作簿对象
+     * @throws IOException
+     */
+    public static Workbook getWorkbook(InputStream inputStream, String fileType) throws IOException {
+        Workbook workbook = null;
+        if (fileType.equalsIgnoreCase(XLS)) {
+            workbook = new HSSFWorkbook(inputStream);
+        } else if (fileType.equalsIgnoreCase(XLSX)) {
+            workbook = new XSSFWorkbook(inputStream);
+        }
+        return workbook;
+    }
+
+    /**
+     * 读取Excel文件内容
+     * @param fileName 要读取的Excel文件所在路径
+     * @return 读取结果列表，读取失败时返回null
+     */
+    public static List<ExcelDataVo> readExcel(String fileName) {
+
+        Workbook workbook = null;
+        FileInputStream inputStream = null;
+
+        try {
+            // 获取Excel后缀名
+            String fileType = fileName.substring(fileName.lastIndexOf(".") + 1, fileName.length());
+            // 获取Excel文件
+            File excelFile = new File(fileName);
+            if (!excelFile.exists()) {
+                System.out.println("指定的Excel文件不存在！");
+                return null;
+            }
+
+            // 获取Excel工作簿
+            inputStream = new FileInputStream(excelFile);
+            workbook = getWorkbook(inputStream, fileType);
+
+            // 读取excel中的数据
+            List<ExcelDataVo> resultDataList = parseExcel(workbook);
+
+            return resultDataList;
+        } catch (Exception e) {
+            System.out.println("解析Excel失败，文件名：" + fileName + " 错误信息：" + e.getMessage());
+            return null;
+        } finally {
+            try {
+                if (null != workbook) {
+                    workbook.close();
+                }
+                if (null != inputStream) {
+                    inputStream.close();
+                }
+            } catch (Exception e) {
+                System.out.println("关闭数据流出错！错误信息：" + e.getMessage());
+                return null;
+            }
+        }
+    }
+
+    /**
+     * 解析Excel数据
+     * @param workbook Excel工作簿对象
+     * @return 解析结果
+     */
+    private static List<ExcelDataVo> parseExcel(Workbook workbook) {
+        List<ExcelDataVo> resultDataList = new ArrayList<>();
+        // 解析sheet
+        for (int sheetNum = 0; sheetNum < workbook.getNumberOfSheets(); sheetNum++) {
+            Sheet sheet = workbook.getSheetAt(sheetNum);
+
+            // 校验sheet是否合法
+            if (sheet == null) {
+                continue;
+            }
+
+            // 获取第一行数据
+            int firstRowNum = sheet.getFirstRowNum();
+            Row firstRow = sheet.getRow(firstRowNum);
+            if (null == firstRow) {
+                System.out.println("解析Excel失败，在第一行没有读取到任何数据！");
+            }
+
+            // 解析每一行的数据，构造数据对象
+            int rowStart = firstRowNum + 1;
+            int rowEnd = sheet.getPhysicalNumberOfRows();
+            for (int rowNum = rowStart; rowNum < rowEnd; rowNum++) {
+                Row row = sheet.getRow(rowNum);
+
+                if (null == row) {
+                    continue;
+                }
+
+                ExcelDataVo resultData = convertRowToData(row);
+                if (null == resultData) {
+                    System.out.println("第 " + row.getRowNum() + "行数据不合法，已忽略！");
+                    continue;
+                }
+                resultDataList.add(resultData);
+            }
+        }
+
+        return resultDataList;
+    }
+
+    /**
+     * 将单元格内容转换为字符串
+     * @param cell
+     * @return
+     */
+    private static String convertCellValueToString(Cell cell) {
+        if(cell==null){
+            return null;
+        }
+        String returnValue = null;
+        switch (cell.getCellType()) {
+            case NUMERIC:   //数字
+                Double doubleValue = cell.getNumericCellValue();
+
+                // 格式化科学计数法，取一位整数
+                DecimalFormat df = new DecimalFormat("0");
+                returnValue = df.format(doubleValue);
+                break;
+            case STRING:    //字符串
+                returnValue = cell.getStringCellValue();
+                break;
+            case BOOLEAN:   //布尔
+                Boolean booleanValue = cell.getBooleanCellValue();
+                returnValue = booleanValue.toString();
+                break;
+            case BLANK:     // 空值
+                break;
+            case FORMULA:   // 公式
+                returnValue = cell.getCellFormula();
+                break;
+            case ERROR:     // 故障
+                break;
+            default:
+                break;
+        }
+        return returnValue;
+    }
+
+    /**
+     * 提取每一行中需要的数据，构造成为一个结果数据对象
+     *
+     * 当该行中有单元格的数据为空或不合法时，忽略该行的数据
+     *
+     * @param row 行数据
+     * @return 解析后的行数据对象，行数据错误时返回null
+     */
+    private static ExcelDataVo convertRowToData(Row row) {
+        ExcelDataVo resultData = new ExcelDataVo();
+
+        Cell cell;
+        int cellNum = 0;
+        // 获取姓名
+        cell = row.getCell(cellNum++);
+        String name = convertCellValueToString(cell);
+        resultData.setName(name);
+
+        return resultData;
+    }
+}