图片分页
This commit is contained in:
lijiazhuo
131
src/main/java/com/example/sso/controller/TuiZuController.java
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131
src/main/java/com/example/sso/controller/TuiZuController.java
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package com.example.sso.controller;
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import com.alibaba.fastjson.JSONArray;
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import com.alibaba.fastjson.JSONObject;
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import com.example.sso.dao.Photo;
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import com.example.sso.dao.ThumbnailCompressor;
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import com.example.sso.test.O;
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import com.example.sso.util.APIUtils;
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import com.example.sso.util.TimeUtil;
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import com.example.sso.util.TimeUtils;
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import lombok.extern.slf4j.Slf4j;
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import org.springframework.scheduling.annotation.Async;
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import org.springframework.web.bind.annotation.PostMapping;
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import org.springframework.web.bind.annotation.RequestBody;
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import org.springframework.web.bind.annotation.RestController;
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import java.io.IOException;
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@Async
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@RestController
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@Slf4j
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public class TuiZuController {
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@PostMapping("/tz")
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public void yuezu(@RequestBody JSONObject data) throws IOException {
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log.info("退租数据" + data.toJSONString());
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JSONObject object = data.getJSONObject("data");
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String id = object.getString("_id");
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String car = object.getString("car");
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String sj = object.getString("sj");
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String timss = TimeUtil.timss(sj);
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Integer gl = object.getInteger("gl");
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Integer dl = object.getInteger("dl");
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JSONArray mx = object.getJSONArray("mx");
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JSONArray yz = object.getJSONArray("yz");
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JSONArray cj = object.getJSONArray("cj");
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String ww = object.getString("ww");
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String wws = "姓名/联营方公司: " + ww;
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String cars = "车牌号码:" + car;
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String gls = "车辆公里数（KM）: " + gl.toString();
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String dls = "车辆剩余电量（KM）: " + dl.toString();
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String sjs = "验车时间:" + timss;
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Photo.startPDF("/home/java/dpapp8090/pdf/" + id + ".pdf");
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Photo.TextAlignment("交车定损单");
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Photo.appendTextSection("\n");
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Photo.appendTextSection("驾驶员信息");
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Photo.appendTextSection("\n");
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Photo.appendTextSection(wws);
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Photo.appendTextSection("\n");
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Photo.appendTextSection("\n");
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Photo.appendTextSection("\n");
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Photo.appendTextSection("车辆信息");
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Photo.appendTextSection("\n");
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Photo.appendTextSection(cars);
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Photo.appendTextSection(gls);
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Photo.appendTextSection(dls);
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Photo.appendTextSection(sjs);
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Photo.appendTextSection("\n");
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Photo.appendTextSection("\n");
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Photo.appendTextSection("\n");
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Photo.appendTextSection("车辆整体照片");
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for (Object yzs : yz) {
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JSONObject jsonObject = (JSONObject) yzs;
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String url = jsonObject.getString("url");
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String hkfile = APIUtils.hkfile(url);
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ThumbnailCompressor.compressWithThumbnailator(hkfile, hkfile);
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Photo.appendImageSection(hkfile);
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}
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Photo.appendTextSection("车架号照片");
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for (Object yzs : cj) {
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JSONObject jsonObject = (JSONObject) yzs;
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String url = jsonObject.getString("url");
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String hkfile = APIUtils.hkfile(url);
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ThumbnailCompressor.compressWithThumbnailator(hkfile, hkfile);
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Photo.appendImageSection(hkfile);
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}
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Photo.appendTextSection("\n");
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Photo.appendTextSection("\n");
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Photo.appendTextSection("\n");
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for (Object o : mx) {
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JSONObject test = (JSONObject) o;
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String xiang = test.getString("xiang");
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String xiangs = "验车受损项:" + xiang;
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Photo.appendTextSection(xiangs);
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JSONArray tp = test.getJSONArray("tp");
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if (tp != null && tp.size() != 0) {
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for (Object o1 : tp) {
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JSONObject tests = (JSONObject) o1;
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String url = tests.getString("url");
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String hkfile = APIUtils.hkfile(url);
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ThumbnailCompressor.compressWithThumbnailator(hkfile, hkfile);
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Photo.appendTextSection("车损详情图片:");
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Photo.appendTextSection("\n");
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Photo.appendImageSection(hkfile);
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}
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}
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Photo.appendTextSection("\n");
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}
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Photo.closePDF();
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}
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}
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274
src/main/java/com/example/sso/dao/Photo.java
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274
src/main/java/com/example/sso/dao/Photo.java
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package com.example.sso.dao;
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import com.itextpdf.io.image.ImageData;
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import com.itextpdf.io.image.ImageDataFactory;
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import com.itextpdf.kernel.font.PdfFont;
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import com.itextpdf.kernel.font.PdfFontFactory;
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import com.itextpdf.kernel.geom.PageSize;
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import com.itextpdf.kernel.pdf.PdfDocument;
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import com.itextpdf.kernel.pdf.PdfWriter;
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import com.itextpdf.layout.Document;
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import com.itextpdf.layout.element.Image;
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import com.itextpdf.layout.element.Paragraph;
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import com.itextpdf.layout.properties.TextAlignment;
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import java.io.File;
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import java.io.IOException;
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import java.io.InputStream;
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public class Photo {
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private static PdfDocument pdfDoc = null;
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private static Document document = null;
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private static String currentPdfPath = null;
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/**
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* 开始创建PDF
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*/
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public static void startPDF(String pdfPath) throws IOException {
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if (pdfDoc != null) {
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closePDF();
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}
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/* currentPdfPath = pdfPath;
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PdfWriter writer = new PdfWriter(pdfPath);
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pdfDoc = new PdfDocument(writer);
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// document = new Document(pdfDoc);
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// 创建文档时设置0边距
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document = new Document(pdfDoc, PageSize.A4, false);
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// 设置页边距为0
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document.setMargins(0, 0, 0, 0);
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// 或者使用具体的值
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// document.setMargins(0f, 0f, 0f, 0f);
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// 移除默认的页眉页脚
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pdfDoc.getDefaultPageSize();*/
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currentPdfPath = pdfPath;
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PdfWriter writer = new PdfWriter(pdfPath);
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pdfDoc = new PdfDocument(writer);
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// A4纸的标准宽度是595点（约210mm），高度自定义
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// PageSize.A4.getWidth() 获取A4宽度
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PageSize customPageSize = new PageSize(PageSize.A4.getWidth(), 842*20);
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document = new Document(pdfDoc, customPageSize, false);
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document.setMargins(0, 0, 0, 0);
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System.out.println("开始创建PDF: " + pdfPath);
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}
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/**
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* 添加图片章节
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*/
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public static void appendImageSection(String imagePath) throws IOException {
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if (document == null) {
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throw new IllegalStateException("请先调用 startPDF() 方法");
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}
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// 添加章节标题
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// document.add(new Paragraph("图片部分")
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// .setFontSize(20)
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// .setBold()
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// .setMarginTop(20));
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// 添加图片
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if (imagePath != null && new File(imagePath).exists()) {
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ImageData imageData = ImageDataFactory.create(imagePath);
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Image image = new Image(imageData);
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// image.setAutoScale(true);
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image.setHorizontalAlignment(com.itextpdf.layout.properties.HorizontalAlignment.CENTER);
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image.setMarginTop(5);
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image.setMarginBottom(5);
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image.setHeight(200);
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image.setWidth(200);
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document.add(image);
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// document.add(new Paragraph("图片说明")
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// .setFontSize(10)
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// .setItalic()
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// .setTextAlignment(com.itextpdf.layout.properties.TextAlignment.CENTER));
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}
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System.out.println("已添加图片章节");
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}
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/**
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* 添加文本章节
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*/
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public static void appendTextSection(String text) throws IOException {
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if (document == null) {
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throw new IllegalStateException("请先调用 startPDF() 方法");
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}
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PdfFont chineseFont = PdfFontFactory.createFont("STSong-Light", "UniGB-UCS2-H");
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// 添加章节标题
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document.add(new Paragraph(text)
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.setFont(chineseFont)
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.setFontSize(20)
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.setBold()
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.setMarginTop(20));
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/* // 添加文本
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if (text != null && !text.trim().isEmpty()) {
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String[] paragraphs = text.split("\n");
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for (String para : paragraphs) {
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document.add(new Paragraph(para)
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.setFontSize(12)
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.setMarginBottom(10));
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}
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}*/
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System.out.println("已添加文本章节");
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}
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public static void TextAlignment(String text) throws IOException {
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if (document == null) {
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throw new IllegalStateException("请先调用 startPDF() 方法");
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}
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PdfFont chineseFont = PdfFontFactory.createFont("STSong-Light", "UniGB-UCS2-H");
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// 创建段落并设置居中对齐
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Paragraph paragraph = new Paragraph(text)
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.setFont(chineseFont)
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.setFontSize(20)
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.setBold()
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.setMarginTop(20)
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.setTextAlignment(TextAlignment.CENTER); // 添加这行实现居中
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document.add(paragraph);
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System.out.println("已添加文本章节");
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}
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public static void appendTextSections(String text) throws IOException {
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if (document == null) {
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throw new IllegalStateException("请先调用 startPDF() 方法");
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}
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PdfFont chineseFont = PdfFontFactory.createFont("STSong-Light", "UniGB-UCS2-H");
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// 添加章节标题
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// 设置绝对位置在页面底部
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Paragraph paragraph = new Paragraph(text);
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float pageHeight = PageSize.A4.getHeight(); // 842点
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float bottomMargin = 50; // 距离底部50点
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float leftMargin = 400; // 左边距
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paragraph.setFixedPosition(leftMargin, bottomMargin, PageSize.A4.getWidth() - 40).setFont(chineseFont);
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document.add(paragraph);
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/* // 添加文本
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if (text != null && !text.trim().isEmpty()) {
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String[] paragraphs = text.split("\n");
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for (String para : paragraphs) {
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document.add(new Paragraph(para)
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.setFontSize(12)
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.setMarginBottom(10));
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}
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}*/
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System.out.println("已添加文本章节");
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}
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/**
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* 添加分页符
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*/
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public static void addPageBreak() {
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if (document != null) {
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document.add(new com.itextpdf.layout.element.AreaBreak());
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System.out.println("已添加分页符");
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}
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}
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/**
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* 关闭并保存PDF
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*/
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public static void closePDF() {
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if (document != null) {
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document.close();
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document = null;
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}
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if (pdfDoc != null) {
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pdfDoc.close();
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pdfDoc = null;
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}
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System.out.println("PDF已保存: " + currentPdfPath);
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currentPdfPath = null;
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}
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/**
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* 快速使用示例
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*/
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public static void createPDFWithMultipleSections(String pdfPath) throws IOException {
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startPDF(pdfPath);
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// 添加各种内容
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appendTextSection("这是文档的第一部分\n包含一些介绍性的文字");
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appendImageSection("image1.jpg");
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appendTextSection("这是图片1的描述文字");
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appendImageSection("image2.png");
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appendTextSection("这是图片2的描述文字");
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// 关闭并保存
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closePDF();
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}
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public static void createSimpleChinesePDF() throws IOException {
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// 1. 创建PDF
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PdfWriter writer = new PdfWriter("D:\\下载模板\\a.pdf");
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PdfDocument pdfDoc = new PdfDocument(writer);
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Document document = new Document(pdfDoc);
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// 2. 加载中文字体（必须要有font-asian依赖）
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PdfFont chineseFont = PdfFontFactory.createFont("STSong-Light", "UniGB-UCS2-H");
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// 3. 添加中文内容
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Paragraph title = new Paragraph("中文标题")
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.setFont(chineseFont)
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.setFontSize(20)
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.setBold();
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document.add(title);
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Paragraph content = new Paragraph("这是中文内容，可以正常显示。")
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.setFont(chineseFont)
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.setFontSize(12);
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document.add(content);
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// 4. 关闭文档
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document.close();
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System.out.println("PDF创建完成");
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}
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public static void main(String[] args) {
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try {
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createSimpleChinesePDF();
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} catch (IOException e) {
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System.out.println("错误: " + e.getMessage());
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System.out.println("请确保添加了 font-asian 依赖");
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}
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}
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}
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114
src/main/java/com/example/sso/dao/ThumbnailCompressor.java
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114
src/main/java/com/example/sso/dao/ThumbnailCompressor.java
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@ -0,0 +1,114 @@
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package com.example.sso.dao;
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import net.coobird.thumbnailator.Thumbnails;
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import net.coobird.thumbnailator.geometry.Positions;
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import javax.imageio.ImageIO;
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import java.awt.image.BufferedImage;
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import java.io.*;
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import java.nio.file.Files;
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import java.nio.file.Paths;
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public class ThumbnailCompressor {
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private static final long MAX_SIZE = 300 * 1024; // 500KB
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/**
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* 使用Thumbnailator压缩图片
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*/
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public static long compressWithThumbnailator(String inputPath, String outputPath) throws IOException {
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File inputFile = new File(inputPath);
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long fileSize = inputFile.length();
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System.out.println("原始大小: " + formatFileSize(fileSize));
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// 如果小于500KB，直接复制
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if (fileSize <= MAX_SIZE) {
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Files.copy(inputFile.toPath(), Paths.get(outputPath));
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return fileSize;
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}
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// 获取图片尺寸
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BufferedImage originalImage = ImageIO.read(inputFile);
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int width = originalImage.getWidth();
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int height = originalImage.getHeight();
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// 计算缩放比例
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float scale = 1.0f;
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if (width > 1920 || height > 1080) {
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float widthRatio = 1920f / width;
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float heightRatio = 1080f / height;
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scale = Math.min(widthRatio, heightRatio);
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}
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// 逐步压缩
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float quality = 0.9f;
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long compressedSize = Long.MAX_VALUE;
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ByteArrayOutputStream baos = new ByteArrayOutputStream();
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while (quality > 0.1f && compressedSize > MAX_SIZE) {
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baos.reset();
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Thumbnails.of(inputFile)
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.scale(scale)
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.outputQuality(quality)
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.outputFormat("jpg")
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.toOutputStream(baos);
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compressedSize = baos.size();
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System.out.println("质量: " + quality + ", 大小: " + formatFileSize(compressedSize));
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quality -= 0.1f;
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}
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// 保存文件
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try (FileOutputStream fos = new FileOutputStream(outputPath)) {
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fos.write(baos.toByteArray());
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}
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return compressedSize;
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}
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/**
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* 批量压缩
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*/
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public static void batchCompress(String inputDir, String outputDir, long maxSize) throws IOException {
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File dir = new File(inputDir);
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File[] imageFiles = dir.listFiles((d, name) ->
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name.toLowerCase().endsWith(".jpg") ||
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name.toLowerCase().endsWith(".jpeg") ||
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name.toLowerCase().endsWith(".png") ||
|
||||
name.toLowerCase().endsWith(".bmp")
|
||||
);
|
||||
|
||||
if (imageFiles == null) return;
|
||||
|
||||
for (File imageFile : imageFiles) {
|
||||
String outputPath = outputDir + File.separator + "compressed_" + imageFile.getName();
|
||||
long compressedSize = compressWithThumbnailator(imageFile.getPath(), outputPath);
|
||||
|
||||
System.out.println(imageFile.getName() +
|
||||
" 压缩后: " + formatFileSize(compressedSize));
|
||||
}
|
||||
}
|
||||
|
||||
private static String formatFileSize(long size) {
|
||||
if (size < 1024) return size + " B";
|
||||
if (size < 1024 * 1024) return String.format("%.2f KB", size / 1024.0);
|
||||
if (size < 1024 * 1024 * 1024) return String.format("%.2f MB", size / (1024.0 * 1024.0));
|
||||
return String.format("%.2f GB", size / (1024.0 * 1024.0 * 1024.0));
|
||||
}
|
||||
|
||||
public static void main(String[] args) {
|
||||
try {
|
||||
// 压缩单个图片
|
||||
long size = compressWithThumbnailator("D:\\下载模板\\微信图片_20251224111834_4_27.jpg", "D:\\下载模板\\微信图片_20251224111834_4_27.jpg");
|
||||
System.out.println("最终大小: " + formatFileSize(size));
|
||||
|
||||
// 批量压缩
|
||||
// batchCompress("input_images", "output_images", 500 * 1024);
|
||||
|
||||
} catch (IOException e) {
|
||||
e.printStackTrace();
|
||||
}
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user