添加功能
This commit is contained in:
马宝龙
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package com.ruoyi.cms.util.document;
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import java.lang.reflect.Method;
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import java.util.List;
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/**
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* 就业服务Excel工具类，直接使用原始的ExcelUtil类
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* 提供便捷的方法设置数据列表和工作表名称
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*/
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public class ExcelUtil<T> extends com.ruoyi.common.utils.poi.ExcelUtil<T> {
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public ExcelUtil(Class<T> pojoClass) {
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super(pojoClass);
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// 不在这里调用init方法，而是在setDataList之后调用
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}
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/**
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* 设置数据列表
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* @param dataList 数据列表
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* @return 当前实例，支持链式调用
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*/
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public ExcelUtil<T> setDataList(List<T> dataList) {
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try {
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// 直接使用反射设置父类的list字段
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java.lang.reflect.Field listField = getClass().getSuperclass().getDeclaredField("list");
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listField.setAccessible(true);
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listField.set(this, dataList);
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// 在设置数据列表后调用init方法
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this.init();
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return this;
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} catch (Exception e) {
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throw new RuntimeException("设置数据列表失败", e);
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}
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}
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/**
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* 设置工作表名称
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* @param sheetName 工作表名称
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* @return 当前实例，支持链式调用
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*/
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public ExcelUtil<T> setSheetName(String sheetName) {
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try {
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// 直接使用反射设置父类的sheetName字段
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java.lang.reflect.Field sheetNameField = getClass().getSuperclass().getDeclaredField("sheetName");
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sheetNameField.setAccessible(true);
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sheetNameField.set(this, sheetName);
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return this;
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} catch (Exception e) {
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throw new RuntimeException("设置工作表名称失败", e);
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}
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}
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/**
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* 初始化方法，确保对象正确初始化
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*/
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private void init() {
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try {
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// 调用父类的createExcelField方法创建Excel字段映射
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Method createExcelFieldMethod = getClass().getSuperclass().getDeclaredMethod("createExcelField");
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createExcelFieldMethod.setAccessible(true);
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createExcelFieldMethod.invoke(this);
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} catch (Exception e) {
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throw new RuntimeException("初始化Excel字段映射失败", e);
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}
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}
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}
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@@ -0,0 +1,558 @@
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package com.ruoyi.cms.util.document;
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import com.ruoyi.common.utils.DateUtils;
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import com.ruoyi.common.utils.poi.ExcelUtil;
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import lombok.extern.slf4j.Slf4j;
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import org.apache.poi.ss.usermodel.BorderStyle;
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import org.apache.poi.ss.usermodel.Cell;
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import org.apache.poi.ss.usermodel.CellStyle;
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import org.apache.poi.ss.usermodel.DataFormat;
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import org.apache.poi.ss.usermodel.Font;
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import org.apache.poi.ss.usermodel.HorizontalAlignment;
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import org.apache.poi.ss.usermodel.IndexedColors;
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import org.apache.poi.ss.usermodel.Row;
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import org.apache.poi.ss.usermodel.Sheet;
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import org.apache.poi.ss.usermodel.VerticalAlignment;
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import org.apache.poi.ss.usermodel.Workbook;
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import org.apache.poi.xssf.streaming.SXSSFWorkbook;
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import org.springframework.stereotype.Component;
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import javax.servlet.http.HttpServletResponse;
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import java.io.IOException;
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import java.lang.reflect.Field;
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import java.lang.reflect.Method;
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import java.net.URLEncoder;
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import java.nio.charset.StandardCharsets;
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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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import java.util.concurrent.ConcurrentHashMap;
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/**
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* 多工作表Excel导出工具类
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* 支持添加多个ExcelUtil实例，每个实例对应一个工作表
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*
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* @author
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* @date
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*/
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@Slf4j
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@Component
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public class MultiSheetExcelUtil {
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private final List<ExcelUtil<?>> excelUtilList;
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private final Workbook workbook;
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// 临时变量，存储外部指定的文件名
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private String customFileName;
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// 缓存反射方法，避免重复查找
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private static final Map<String, Method> METHOD_CACHE = new ConcurrentHashMap<>();
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// 缓存反射字段，避免重复查找
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private static final Map<String, Field> FIELD_CACHE = new ConcurrentHashMap<>();
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/**
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* 构造函数
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*/
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public MultiSheetExcelUtil() {
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this.excelUtilList = new ArrayList<>();
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// 使用SXSSFWorkbook以支持大数据量导出
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this.workbook = new SXSSFWorkbook(100); // 100条记录保存在内存中
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}
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/**
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* 添加一个ExcelUtil实例（对应一个工作表）
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*
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* @param excelUtil ExcelUtil实例
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* @return 当前实例，支持链式调用
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*/
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public MultiSheetExcelUtil addSheet(ExcelUtil<?> excelUtil) {
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excelUtilList.add(excelUtil);
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return this;
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}
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/**
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* 设置外部指定的文件名
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*
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* @param customFileName 外部指定的文件名（不包含扩展名）
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* @return 当前实例，支持链式调用
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*/
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public MultiSheetExcelUtil setFileName(String customFileName) {
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this.customFileName = customFileName;
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return this;
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}
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/**
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* 获取工作表名称
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*
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* @param excelUtil ExcelUtil实例
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* @return 工作表名称
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*/
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private String getSheetName(ExcelUtil<?> excelUtil) {
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try {
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if (excelUtil == null) {
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return "Sheet"; // 返回默认名称
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}
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// 使用缓存的方法获取字段
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String sheetName = (String) getPrivateField(excelUtil, "sheetName");
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// 如果从字段获取的名称为空，则返回默认名称
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if (sheetName == null || sheetName.trim().isEmpty()) {
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return "Sheet";
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}
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// 确保工作表名称不超过Excel限制
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if (sheetName.length() > 31) {
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sheetName = sheetName.substring(0, 31);
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}
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return sheetName;
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} catch (Exception e) {
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System.err.println("获取工作表名称时出错: " + e.getMessage());
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// 如果出错，返回默认名称
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return "Sheet";
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}
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}
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/**
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* 导出Excel文件（直接输出到HttpServletResponse）
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*
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* @param response HttpServletResponse
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* @throws IOException IOException
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*/
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public void exportExcel(HttpServletResponse response) throws IOException {
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try {
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if (excelUtilList.isEmpty()) {
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throw new IOException("没有要导出的工作表");
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}
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// 获取第一个ExcelUtil实例
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ExcelUtil<?> firstExcelUtil = excelUtilList.get(0);
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// 设置所有ExcelUtil实例使用同一个Workbook并重新创建样式
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for (ExcelUtil<?> excelUtil : excelUtilList) {
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if (excelUtil != null) {
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try {
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// 尝试设置wb字段，如果不存在则忽略错误
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setPrivateField(excelUtil, "wb", workbook);
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// 为每个ExcelUtil实例创建新的样式，确保与当前Workbook关联
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Map<String, CellStyle> styles = createStylesForSheet(workbook);
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setPrivateField(excelUtil, "styles", styles);
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} catch (Exception e) {
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// 如果设置字段失败，继续处理下一个ExcelUtil实例
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System.err.println("处理ExcelUtil实例时出错: " + e.getMessage());
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}
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}
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}
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// 为每个ExcelUtil实例创建工作表并填充数据
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for (int i = 0; i < excelUtilList.size(); i++) {
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ExcelUtil<?> excelUtil = excelUtilList.get(i);
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// 设置当前工作表对象
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Sheet newSheet = workbook.createSheet();
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workbook.setSheetName(i, getSheetName(excelUtil));
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setPrivateField(excelUtil, "sheet", newSheet);
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// 重置rownum为0，确保每个工作表都从第一行开始
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setPrivateField(excelUtil, "rownum", 0);
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// 调用createTitle方法创建标题行
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invokeCachedMethod(excelUtil, "createTitle", new Class<?>[]{});
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// 获取字段列表
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List<Object[]> fields = (List<Object[]>) getPrivateField(excelUtil, "fields");
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// 获取子字段列表
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// List<Field> subFields = (List<Field>) getPrivateField(excelUtil, "subFields");
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// 调用createSubHead方法创建子标题行（如果需要）
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try {
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invokeCachedMethod(excelUtil, "createSubHead", new Class<?>[]{});
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} catch (Exception e) {
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// 如果没有createSubHead方法或调用失败，忽略该异常
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}
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// 填充每一行数据
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List<?> dataList = null;
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try {
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dataList = (List<?>) getPrivateField(excelUtil, "list");
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} catch (Exception e) {
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System.err.println("获取数据列表失败: " + e.getMessage());
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}
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if (dataList != null && !dataList.isEmpty()) {
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// 从excelUtil对象中获取sheet字段的值
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Sheet sheet = (Sheet) getPrivateField(excelUtil, "sheet");
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if (sheet == null) {
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continue; // 如果sheet为空，跳过当前工作表
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}
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// 字段列表已经在第360行定义，直接使用
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if (fields == null || fields.isEmpty()) {
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continue; // 跳过没有字段的工作表
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}
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// 获取当前行号
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Object rownumObj = getPrivateField(excelUtil, "rownum");
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int currentRowNum = rownumObj != null ? (int) rownumObj : 0;
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// 遍历数据列表，填充每一行数据
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for (int j = 0; j < dataList.size(); j++) {
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// 创建新行
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Row dataRow = sheet.createRow(currentRowNum++);
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// 获取当前数据对象
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Object dataObj = dataList.get(j);
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// 遍历字段列表，填充每一列数据
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int column = 0;
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for (Object[] os : fields) {
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if (os.length < 2) {
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continue;
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}
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Field field = (Field) os[0];
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//Excel excel = (Excel) os[1];
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try {
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// 设置字段可访问
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field.setAccessible(true);
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// 获取字段值
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Object fieldValue = field.get(dataObj);
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// 创建单元格
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Cell cell = dataRow.createCell(column++);
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// 设置单元格值
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if (fieldValue != null) {
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cell.setCellValue(fieldValue.toString());
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} else {
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cell.setCellValue("");
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}
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} catch (Exception e) {
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System.err.println("填充数据失败: " + e.getMessage());
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log.error("发生异常", e);
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}
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}
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}
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// 更新行号
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setPrivateField(excelUtil, "rownum", currentRowNum);
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}
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// 调用addStatisticsRow方法添加统计行（如果需要）
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try {
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invokeCachedMethod(excelUtil, "addStatisticsRow", new Class<?>[]{});
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} catch (Exception e) {
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// 如果没有addStatisticsRow方法或调用失败，忽略该异常
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}
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}
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// 使用第一个ExcelUtil实例的exportExcel方法导出所有工作表
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// 但需要替换其writeSheet调用，因为我们已经创建了所有工作表
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exportAllSheetsToResponse(firstExcelUtil, response);
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} catch (Exception e) {
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log.error("发生异常", e);
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throw new IOException("导出Excel失败，请联系管理员", e);
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} finally {
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// 确保清理资源
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dispose();
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}
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}
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/**
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* 导出所有工作表到HttpServletResponse（绕过writeSheet调用）
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*
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* @param excelUtil ExcelUtil实例
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* @param response HttpServletResponse
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* @throws Exception Exception
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*/
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private void exportAllSheetsToResponse(ExcelUtil<?> excelUtil, HttpServletResponse response) throws Exception {
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// 获取Workbook和工作表名称
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Workbook wb = (Workbook) getPrivateField(excelUtil, "wb");
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String baseFilename;
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// 优先使用外部指定的文件名
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if (customFileName != null && !customFileName.trim().isEmpty()) {
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baseFilename = customFileName.trim();
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} else {
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String sheetName = (String) getPrivateField(excelUtil, "sheetName");
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baseFilename = (sheetName == null || sheetName.trim().isEmpty()) ? "数据导出" : sheetName;
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}
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// 编码文件名并设置响应头
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// 使用格式：名称_时分秒.xlsx，替换原来的UUID格式
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String filename = baseFilename + "_" + DateUtils.dateTimeNow(DateUtils.YYYYMMDDHHMMSS) + ".xlsx";
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// 设置响应头
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response.setContentType("application/vnd.openxmlformats-officedocument.spreadsheetml.sheet");
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response.setCharacterEncoding(StandardCharsets.UTF_8.name());
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// 对文件名编码，解决中文乱码
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String encodedFileName = URLEncoder.encode(filename, StandardCharsets.UTF_8.name()).replaceAll("\\+", "%20");
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response.setHeader("Content-disposition", "attachment;filename*=utf-8''" + encodedFileName);
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// 将Workbook写入响应流
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wb.write(response.getOutputStream());
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}
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/**
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* 获取缓存的字段
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*/
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private Field getCachedField(Class<?> clazz, String fieldName) {
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String key = clazz.getName() + ":" + fieldName;
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return FIELD_CACHE.computeIfAbsent(key, k -> {
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try {
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// 递归查找父类中的字段
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Class<?> currentClass = clazz;
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while (currentClass != null) {
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try {
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Field field = currentClass.getDeclaredField(fieldName);
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field.setAccessible(true);
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return field;
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} catch (NoSuchFieldException e) {
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currentClass = currentClass.getSuperclass();
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}
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}
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return null;
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} catch (Exception e) {
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System.err.println("缓存字段失败: " + key + ", 错误: " + e.getMessage());
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return null;
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}
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});
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}
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/**
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* 获取缓存的方法
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*/
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private Method getCachedMethod(Class<?> clazz, String methodName, Class<?>... parameterTypes) {
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String key = clazz.getName() + ":" + methodName + ":" + parameterTypes.length;
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return METHOD_CACHE.computeIfAbsent(key, k -> {
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try {
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// 递归查找父类中的方法
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Class<?> currentClass = clazz;
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while (currentClass != null) {
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try {
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Method method = currentClass.getDeclaredMethod(methodName, parameterTypes);
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method.setAccessible(true);
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return method;
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} catch (NoSuchMethodException e) {
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currentClass = currentClass.getSuperclass();
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}
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}
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return null;
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} catch (Exception e) {
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System.err.println("缓存方法失败: " + key + ", 错误: " + e.getMessage());
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return null;
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}
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});
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}
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/**
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* 获取私有字段的值
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*
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* @param obj 对象
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* @param fieldName 字段名
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* @return 字段值
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*/
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private Object getPrivateField(Object obj, String fieldName) {
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try {
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if (obj == null || fieldName == null || fieldName.trim().isEmpty()) {
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System.err.println("参数无效: obj或fieldName为null或空");
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return null;
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}
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Class<?> clazz = obj.getClass();
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Field field = getCachedField(clazz, fieldName);
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if (field == null) {
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// 如果缓存中没有，递归查找父类中的字段
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Class<?> currentClass = clazz;
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while (currentClass != null) {
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try {
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field = currentClass.getDeclaredField(fieldName);
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field.setAccessible(true);
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break;
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} catch (NoSuchFieldException e) {
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currentClass = currentClass.getSuperclass();
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}
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}
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}
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if (field != null) {
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return field.get(obj);
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} else {
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System.err.println("找不到字段: " + fieldName);
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return null;
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}
|
||||
} catch (IllegalAccessException e) {
|
||||
System.err.println("访问字段失败: " + fieldName + ", 错误: " + e.getMessage());
|
||||
log.error("发生异常", e);
|
||||
return null;
|
||||
} catch (Exception e) {
|
||||
System.err.println("获取私有字段失败: " + fieldName + ", 错误: " + e.getMessage());
|
||||
log.error("发生异常", e);
|
||||
return null;
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* 设置私有字段的值
|
||||
*
|
||||
* @param obj 对象
|
||||
* @param fieldName 字段名
|
||||
* @param value 值
|
||||
*/
|
||||
private boolean setPrivateField(Object obj, String fieldName, Object value) {
|
||||
try {
|
||||
if (obj == null || fieldName == null || fieldName.trim().isEmpty()) {
|
||||
System.err.println("参数无效: obj或fieldName为null或空");
|
||||
return false;
|
||||
}
|
||||
|
||||
// 先尝试从直接类查找
|
||||
Class<?> clazz = obj.getClass();
|
||||
Field field = null;
|
||||
|
||||
// 递归查找父类中的字段
|
||||
while (clazz != null && field == null) {
|
||||
try {
|
||||
field = clazz.getDeclaredField(fieldName);
|
||||
} catch (NoSuchFieldException e) {
|
||||
clazz = clazz.getSuperclass();
|
||||
}
|
||||
}
|
||||
|
||||
if (field != null) {
|
||||
field.setAccessible(true);
|
||||
field.set(obj, value);
|
||||
return true;
|
||||
} else {
|
||||
// 字段不存在，记录日志但不抛出异常
|
||||
System.err.println("缓存字段失败: " + obj.getClass().getName() + ":" + fieldName + ", 错误: " + fieldName);
|
||||
return false;
|
||||
}
|
||||
} catch (Exception e) {
|
||||
// 捕获所有异常，记录日志但不中断程序
|
||||
System.err.println("设置私有字段失败: " + obj.getClass().getName() + ":" + fieldName + ", 错误: " + e.getMessage());
|
||||
return false;
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* 调用缓存的方法
|
||||
*/
|
||||
private Object invokeCachedMethod(Object obj, String methodName, Class<?>[] paramTypes, Object... args) {
|
||||
try {
|
||||
if (obj == null || methodName == null || methodName.trim().isEmpty()) {
|
||||
System.err.println("参数无效: obj或methodName为null或空");
|
||||
return null;
|
||||
}
|
||||
|
||||
Class<?> clazz = obj.getClass();
|
||||
Method method = getCachedMethod(clazz, methodName, paramTypes);
|
||||
|
||||
if (method == null) {
|
||||
// 如果缓存中没有，递归查找父类中的方法
|
||||
Class<?> currentClass = clazz;
|
||||
while (currentClass != null) {
|
||||
try {
|
||||
method = currentClass.getDeclaredMethod(methodName, paramTypes);
|
||||
method.setAccessible(true);
|
||||
break;
|
||||
} catch (NoSuchMethodException e) {
|
||||
currentClass = currentClass.getSuperclass();
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
if (method != null) {
|
||||
return method.invoke(obj, args);
|
||||
} else {
|
||||
System.err.println("找不到方法: " + methodName);
|
||||
return null;
|
||||
}
|
||||
} catch (Exception e) {
|
||||
System.err.println("调用方法失败: " + methodName + ", 错误: " + e.getMessage());
|
||||
log.error("发生异常", e);
|
||||
return null;
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* 为工作表创建样式，确保样式关联到当前workbook
|
||||
*/
|
||||
private Map<String, CellStyle> createStylesForSheet(Workbook wb) {
|
||||
Map<String, CellStyle> styles = new HashMap<>();
|
||||
|
||||
try {
|
||||
// 创建默认样式
|
||||
CellStyle style = wb.createCellStyle();
|
||||
style.setAlignment(HorizontalAlignment.CENTER);
|
||||
style.setVerticalAlignment(VerticalAlignment.CENTER);
|
||||
Font titleFont = wb.createFont();
|
||||
titleFont.setFontName("Arial");
|
||||
titleFont.setFontHeightInPoints((short) 16);
|
||||
titleFont.setBold(true);
|
||||
style.setFont(titleFont);
|
||||
DataFormat dataFormat = wb.createDataFormat();
|
||||
style.setDataFormat(dataFormat.getFormat("@"));
|
||||
styles.put("title", style);
|
||||
|
||||
// 创建数据样式
|
||||
style = wb.createCellStyle();
|
||||
style.setAlignment(HorizontalAlignment.CENTER);
|
||||
style.setVerticalAlignment(VerticalAlignment.CENTER);
|
||||
style.setBorderRight(BorderStyle.THIN);
|
||||
style.setRightBorderColor(IndexedColors.GREY_50_PERCENT.getIndex());
|
||||
style.setBorderLeft(BorderStyle.THIN);
|
||||
style.setLeftBorderColor(IndexedColors.GREY_50_PERCENT.getIndex());
|
||||
style.setBorderTop(BorderStyle.THIN);
|
||||
style.setTopBorderColor(IndexedColors.GREY_50_PERCENT.getIndex());
|
||||
style.setBorderBottom(BorderStyle.THIN);
|
||||
style.setBottomBorderColor(IndexedColors.GREY_50_PERCENT.getIndex());
|
||||
Font dataFont = wb.createFont();
|
||||
dataFont.setFontName("Arial");
|
||||
dataFont.setFontHeightInPoints((short) 10);
|
||||
style.setFont(dataFont);
|
||||
styles.put("data", style);
|
||||
|
||||
// 创建合计样式
|
||||
style = wb.createCellStyle();
|
||||
style.setAlignment(HorizontalAlignment.CENTER);
|
||||
style.setVerticalAlignment(VerticalAlignment.CENTER);
|
||||
style.setDataFormat(dataFormat.getFormat("######0.00"));
|
||||
Font totalFont = wb.createFont();
|
||||
totalFont.setFontName("Arial");
|
||||
totalFont.setFontHeightInPoints((short) 10);
|
||||
style.setFont(totalFont);
|
||||
styles.put("total", style);
|
||||
|
||||
} catch (Exception e) {
|
||||
System.err.println("创建样式失败: " + e.getMessage());
|
||||
log.error("发生异常", e);
|
||||
}
|
||||
|
||||
return styles;
|
||||
}
|
||||
|
||||
/**
|
||||
* 获取工作簿对象
|
||||
*
|
||||
* @return Workbook
|
||||
*/
|
||||
public Workbook getWorkbook() {
|
||||
return workbook;
|
||||
}
|
||||
|
||||
/**
|
||||
* 清理资源
|
||||
*/
|
||||
public void dispose() {
|
||||
if (workbook instanceof SXSSFWorkbook) {
|
||||
((SXSSFWorkbook) workbook).dispose();
|
||||
}
|
||||
}
|
||||
|
||||
}
|
||||
Reference in New Issue
Block a user