113 lines
3.1 KiB
Java
113 lines
3.1 KiB
Java
package com.ruoyi.cms.util;
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import org.apache.poi.ss.usermodel.*;
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import org.apache.poi.xssf.usermodel.XSSFWorkbook; // 改为XSSFWorkbook
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import java.io.FileInputStream;
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import java.io.IOException;
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import java.lang.reflect.Field;
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import java.math.BigDecimal;
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import java.util.ArrayList;
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import java.util.HashMap;
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import java.util.List;
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import java.util.Map;
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public class ExcelToObject {
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public static <T> List<T> readExcelToObjects(String filePath, Class<T> clazz) throws Exception {
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List<T> resultList = new ArrayList<>();
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try (FileInputStream fileInputStream = new FileInputStream(filePath);
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Workbook workbook = new XSSFWorkbook(fileInputStream)) { // 使用XSSFWorkbook处理 .xlsx 文件
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Sheet sheet = workbook.getSheetAt(0);
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Row headerRow = sheet.getRow(0);
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// 获取表头名称和列索引的映射
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Map<String, Integer> headerMap = new HashMap<>();
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for (Cell cell : headerRow) {
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headerMap.put(cell.getStringCellValue(), cell.getColumnIndex());
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}
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// 处理每一行数据
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for (int i = 1; i <= sheet.getLastRowNum(); i++) {
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Row dataRow = sheet.getRow(i);
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T obj = clazz.newInstance();
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for (Field field : clazz.getDeclaredFields()) {
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String fieldName = field.getName();
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if (headerMap.containsKey(fieldName)) {
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int columnIndex = headerMap.get(fieldName);
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Cell cell = dataRow.getCell(columnIndex);
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// 将表格的值赋给Java对象的字段
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field.setAccessible(true);
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setFieldValue(field, obj, cell);
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}
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}
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resultList.add(obj);
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}
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}
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return resultList;
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}
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private static void setFieldValue(Field field, Object obj, Cell cell) throws IllegalAccessException {
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if (cell == null) return;
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switch (cell.getCellType()) {
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case STRING:
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if (field.getType() == String.class) {
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field.set(obj, cell.getStringCellValue());
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}
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break;
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case NUMERIC:
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if (field.getType() == int.class || field.getType() == Integer.class) {
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field.set(obj, (int) cell.getNumericCellValue());
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} else if (field.getType() == double.class || field.getType() == Double.class) {
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field.set(obj, cell.getNumericCellValue());
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} else if (field.getType() == String.class) {
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// Special handling for phone numbers and other numeric fields as strings
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BigDecimal bigDecimalValue = new BigDecimal(cell.getNumericCellValue());
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field.set(obj, bigDecimalValue.toPlainString());
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}
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break;
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case BOOLEAN:
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if (field.getType() == boolean.class || field.getType() == Boolean.class) {
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field.set(obj, cell.getBooleanCellValue());
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}
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break;
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default:
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break;
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}
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}
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// public static void main(String[] args) {
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// try {
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// List<MyClass> objects = readExcelToObjects("path/to/your/excel.xlsx", MyClass.class);
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// objects.forEach(System.out::println);
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// } catch (Exception e) {
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// e.printStackTrace();
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// }
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// }
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}
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//// 示例Java对象
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//class MyClass {
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// private String name;
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// private int age;
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// private double salary;
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//
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// // getter和setter方法
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//
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// @Override
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// public String toString() {
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// return "MyClass{" +
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// "name='" + name + '\'' +
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// ", age=" + age +
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// ", salary=" + salary +
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// '}';
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// }
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//}
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