优化了PDF导出的效果

pom.xml

@@ -49,18 +49,37 @@
 
     <dependencies>
 
+
         <!-- iTextPDF核心库 - 用于PDF生成 -->
         <dependency>
             <groupId>com.itextpdf</groupId>
             <artifactId>kernel</artifactId>
-            <version>7.2.5</version>
+            <version>7.2.4</version>
         </dependency>
+
+        <dependency>
+            <groupId>com.itextpdf</groupId>
+            <artifactId>io</artifactId>
+            <version>7.2.4</version>
+        </dependency>
+
+        <dependency>
+            <groupId>com.itextpdf</groupId>
+            <artifactId>forms</artifactId>
+            <version>7.2.4</version>
+        </dependency>
+
         <dependency>
             <groupId>com.itextpdf</groupId>
             <artifactId>layout</artifactId>
-            <version>7.2.5</version>
+            <version>7.2.4</version>
         </dependency>
 
+        <dependency>
+            <groupId>com.itextpdf</groupId>
+            <artifactId>svg</artifactId>
+            <version>7.2.4</version>
+        </dependency>
 
         <dependency>
             <groupId>org.springframework.boot</groupId>

src/main/java/com/whdc/service/AutoCallApiService.java

@@ -4,35 +4,40 @@ import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
 import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
 import com.itextpdf.io.font.PdfEncodings;
 import com.itextpdf.kernel.colors.ColorConstants;
+import com.itextpdf.kernel.events.Event;
+import com.itextpdf.kernel.events.IEventHandler;
+import com.itextpdf.kernel.events.PdfDocumentEvent;
 import com.itextpdf.kernel.font.PdfFont;
 import com.itextpdf.kernel.font.PdfFontFactory;
 import com.itextpdf.kernel.geom.PageSize;
+import com.itextpdf.kernel.geom.Rectangle;
 import com.itextpdf.kernel.pdf.PdfDocument;
+import com.itextpdf.kernel.pdf.PdfPage;
+import com.itextpdf.kernel.pdf.PdfReader;
 import com.itextpdf.kernel.pdf.PdfWriter;
+import com.itextpdf.kernel.pdf.canvas.PdfCanvas;
 import com.itextpdf.layout.Document;
 import com.itextpdf.layout.borders.Border;
 import com.itextpdf.layout.element.Cell;
-import com.itextpdf.layout.element.Div;
 import com.itextpdf.layout.element.Paragraph;
 import com.itextpdf.layout.element.Table;
 import com.itextpdf.layout.properties.TextAlignment;
 import com.itextpdf.layout.properties.UnitValue;
 import com.whdc.mapper.*;
 import com.whdc.model.dto.AutoCallDto;
-import com.whdc.model.dto.FindPageDto;
 import com.whdc.model.entity.AutoCall;
 import com.whdc.model.entity.AutoCallPerson;
 import com.whdc.model.entity.AutoCallTask;
 import com.whdc.model.entity.WarnCallMap;
 import com.whdc.utils.DateUtils;
 import lombok.extern.slf4j.Slf4j;
-import org.checkerframework.checker.units.qual.A;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
 
 import javax.servlet.http.HttpServletResponse;
 import java.io.ByteArrayInputStream;
 import java.io.ByteArrayOutputStream;
+import java.io.IOException;
 import java.text.ParseException;
 import java.time.LocalDateTime;
 import java.time.format.DateTimeFormatter;
@@ -236,6 +241,45 @@ public class AutoCallApiService {
         return pageResult;
     }
 
+    private static class PageNumberEventHandler implements IEventHandler {
+        protected PdfDocument pdfDoc;
+        protected PdfFont font;
+        protected int totalPages;
+
+        public PageNumberEventHandler(PdfDocument pdfDoc, PdfFont font, int totalPages) {
+            this.pdfDoc = pdfDoc;
+            this.font = font;
+            this.totalPages = totalPages;
+        }
+
+        @Override
+        public void handleEvent(Event event) {
+            PdfDocumentEvent docEvent = (PdfDocumentEvent) event;
+            PdfPage page = docEvent.getPage();
+            int pageNumber = pdfDoc.getPageNumber(page);
+
+            Rectangle pageSize = page.getPageSize();
+            PdfCanvas pdfCanvas = new PdfCanvas(page);
+            try {
+                pdfCanvas.setFontAndSize(font, 10);
+            } catch (Exception e) {
+                throw new RuntimeException("Error setting font for page number", e);
+            }
+
+            String text = String.format("第 %d 页/共 %d 页", pageNumber, totalPages);
+            float textWidth = font.getWidth(text, 10);
+
+            float x = (pageSize.getLeft() + pageSize.getRight()) / 2 - textWidth / 2;
+            float y = pageSize.getBottom() + 15;
+
+            pdfCanvas.beginText()
+                    .setTextMatrix(x, y)
+                    .showText(text)
+                    .endText()
+                    .release();
+        }
+    }
+
     /**
      * pdf导出
      * @param records
@@ -246,15 +290,57 @@ public class AutoCallApiService {
      */
     public ByteArrayInputStream exportPDF(List<AutoCallTask> records, HttpServletResponse response, String stm, String etm) {
         ByteArrayOutputStream out = new ByteArrayOutputStream();
+
+        // 第一遍：计算总页数
+        ByteArrayOutputStream tempOut = new ByteArrayOutputStream();
+        try (PdfWriter tempWriter = new PdfWriter(tempOut);
+             PdfDocument tempPdfDoc = new PdfDocument(tempWriter);
+             Document tempDoc = new Document(tempPdfDoc, PageSize.A4.rotate())) {
+
+            String fontPath = "/fonts/ChineseFonts.ttf";
+            PdfFont font = PdfFontFactory.createFont(fontPath, PdfEncodings.IDENTITY_H);
+            tempDoc.setFont(font);
+
+            // 添加内容但不处理页码
+            addPDFContent(tempDoc, records, stm, etm, font);
+        } catch (Exception e) {
+            e.printStackTrace();
+            throw new RuntimeException(e);
+        }
+
+        // 获取总页数
+        int totalPages;
+        try (ByteArrayInputStream tempIn = new ByteArrayInputStream(tempOut.toByteArray());
+             PdfReader tempReader = new PdfReader(tempIn);
+             PdfDocument tempPdfDoc = new PdfDocument(tempReader)) {
+            totalPages = tempPdfDoc.getNumberOfPages();
+        } catch (Exception e) {
+            e.printStackTrace();
+            throw new RuntimeException("Failed to calculate total pages", e);
+        }
+
+        // 第二遍：正式生成PDF
         try (PdfWriter writer = new PdfWriter(out);
-             // 设置A4横向（宽297mm，高210mm）
              PdfDocument pdfDoc = new PdfDocument(writer);
              Document document = new Document(pdfDoc, PageSize.A4.rotate())) {
 
-            // 添加标题
+            String fontPath = "/fonts/ChineseFonts.ttf";
-            String fontPath = "/fonts/ChineseFonts.ttf";//设置中文字体（没有这个，中文会乱码）
             PdfFont font = PdfFontFactory.createFont(fontPath, PdfEncodings.IDENTITY_H);
             document.setFont(font);
+
+            // 创建并注册页码事件处理器，传入总页数
+            PageNumberEventHandler pageNumberEventHandler = new PageNumberEventHandler(pdfDoc, font, totalPages);
+            pdfDoc.addEventHandler(PdfDocumentEvent.END_PAGE, pageNumberEventHandler);
+
+            // 添加内容
+            addPDFContent(document, records, stm, etm,font);
+        } catch (Exception e) {
+            e.printStackTrace();
+            throw new RuntimeException(e);
+        }
+        return new ByteArrayInputStream(out.toByteArray());
+    }
+    private void addPDFContent(Document document, List<AutoCallTask> records, String stm, String etm, PdfFont font) throws IOException{
         document.add(new Paragraph("智能呼叫记录报表")
                 .setFontSize(16)
                 .setBold()
@@ -284,11 +370,11 @@ public class AutoCallApiService {
                 150,         // 预警名称
                 120,         // 智能呼叫时间
                 100,         // 县(市、区)
+                160,      // 呼叫对象及职务
                 130,         // 状态
-                    59,         // 通话时长(秒)
+                80,         // 通话时长(秒)
-                    150,         // 拨打时间
+                130,         // 拨打时间
-                    150,         // 结束时间
+                130        // 结束时间
-                    100          // 呼叫对象及职务
         };
         Table table = new Table(columnWidths);
         table.setKeepTogether(true);
@@ -296,15 +382,11 @@ public class AutoCallApiService {
         // 添加表头
         addTableHeader(table);
         // 添加数据行
-            addTableData(table, records);
+        addTableData(table, records,columnWidths,font);
 
         document.add(table);
-        } catch (Exception e) {
-            e.printStackTrace();
-            throw new RuntimeException(e);
-        }
-        return new ByteArrayInputStream(out.toByteArray());
     }
+
 // 更新表头（添加新字段）
 private void addTableHeader(Table table) {
     String[] headers = {
@@ -312,11 +394,11 @@ private void addTableHeader(Table table) {
             "预警名称",
             "智能呼叫时间",
             "县(市、区)",
+            "呼叫对象及职务",
             "状态",
             "通话时长",
             "拨打时间",
-            "结束时间",
+            "结束时间"
-            "呼叫对象及职务"
     };
     for (String header : headers) {
         table.addHeaderCell(new Cell()
@@ -327,12 +409,11 @@ private void addTableHeader(Table table) {
 }
 
     // 更新数据行（适配新字段）
-    private void addTableData(Table table, List<AutoCallTask> records) {
+    private void addTableData(Table table, List<AutoCallTask> records, float[] columnWidths, PdfFont font) {
         int serialNumber = 1;
         for (AutoCallTask record : records) {
             // 拼接县(市、区)
             String region = record.getWarnCtnm() + record.getWarnCnnm();
-
             // 处理呼叫对象信息
             StringBuilder callInfo = new StringBuilder();
             for (AutoCallPerson item : record.getCallList()) {
@@ -372,11 +453,11 @@ private void addTableHeader(Table table) {
             table.addCell(new Cell().add(new Paragraph(record.getWarnName() != null ? record.getWarnName() : "").setFontSize(10)).setKeepTogether(true));
             table.addCell(new Cell().add(new Paragraph(formattedCreateTime).setFontSize(10)).setKeepTogether(true));
             table.addCell(new Cell().add(new Paragraph(region).setFontSize(10)).setKeepTogether(true));
+            table.addCell(new Cell().add(new Paragraph(callInfo.toString()).setFontSize(10)).setKeepTogether(true));
             table.addCell(new Cell().add(new Paragraph(status.toString()).setFontSize(10)).setKeepTogether(true));
             table.addCell(new Cell().add(new Paragraph(callTime.toString()).setFontSize(10)).setKeepTogether(true));
             table.addCell(new Cell().add(new Paragraph(startTime.toString()).setFontSize(10)).setKeepTogether(true));
             table.addCell(new Cell().add(new Paragraph(endTime.toString()).setFontSize(10)).setKeepTogether(true));
-            table.addCell(new Cell().add(new Paragraph(callInfo.toString()).setFontSize(10)).setKeepTogether(true));
         }
     }