108 lines
3.4 KiB
Java
108 lines
3.4 KiB
Java
package cn.keking.utils;
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import com.lowagie.text.Document;
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import com.lowagie.text.Image;
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import com.lowagie.text.Rectangle;
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import com.lowagie.text.pdf.PdfWriter;
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import com.sun.media.jai.codec.ImageCodec;
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import com.sun.media.jai.codec.ImageEncoder;
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import com.sun.media.jai.codec.JPEGEncodeParam;
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import org.springframework.stereotype.Component;
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import javax.media.jai.JAI;
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import javax.media.jai.RenderedOp;
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import java.io.*;
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@Component
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public class ConvertPicUtil {
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/**
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* 图片 转 JPG。
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* 支持输入格式如下：BMP、GIF、FlashPix、JPEG、PNG、PMN、TIFF、WBMP
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* @param strInputFile 输入文件的路径和文件名
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* @param strOutputFile 输出文件的路径和文件名
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* @return
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*/
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public static File convertPic2Jpg(String strInputFile, String strOutputFile) {
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// 读取源图片文件
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RenderedOp roInput = JAI.create("fileload", strInputFile);
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try {
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strOutputFile = strOutputFile.replaceAll("\\\\", "/");
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File fileJpgPath = new File(strOutputFile.substring(0, strOutputFile.lastIndexOf("/")));
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if(!fileJpgPath.exists()){
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fileJpgPath.mkdirs();
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}
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File fileJpg=new File(strOutputFile);
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OutputStream ops = new FileOutputStream(fileJpg);
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// 文件存储输出流
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JPEGEncodeParam param = new JPEGEncodeParam();
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ImageEncoder image = ImageCodec.createImageEncoder("JPEG", ops,
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param); // 指定输出格式
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// 解析输出流进行输出
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image.encode(roInput);
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// 关闭流
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ops.close();
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return fileJpg;
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} catch (FileNotFoundException e) {
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e.printStackTrace();
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} catch (Exception e) {
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e.printStackTrace();
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}
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return null;
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}
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/**
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* 将Jpg图片转换为Pdf文件
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* @param strJpgFile 输入的jpg的路径和文件名
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* @param strPdfFile 输出的pdf的路径和文件名
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* @return
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*/
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public static File convertJpg2Pdf(String strJpgFile, String strPdfFile) {
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Document document = new Document();
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// 设置文档页边距
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document.setMargins(0,0,0,0);
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FileOutputStream fos = null;
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try {
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fos = new FileOutputStream(strPdfFile);
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PdfWriter.getInstance(document, fos);
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// 打开文档
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document.open();
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// 获取图片的宽高
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Image image = Image.getInstance(strJpgFile);
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float floatImageHeight=image.getScaledHeight();
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float floatImageWidth=image.getScaledWidth();
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// 设置页面宽高与图片一致
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Rectangle rectangle = new Rectangle(floatImageWidth, floatImageHeight);
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document.setPageSize(rectangle);
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// 图片居中
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image.setAlignment(Image.ALIGN_CENTER);
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//新建一页添加图片
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document.newPage();
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document.add(image);
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} catch (Exception ioe) {
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ioe.printStackTrace();
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return null;
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} finally {
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//关闭文档
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document.close();
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try {
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fos.flush();
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fos.close();
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File filePDF = new File(strPdfFile);
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return filePDF;
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} catch (IOException e) {
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e.printStackTrace();
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}
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}
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return null;
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}
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}
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