Java如何实现Excel文件转PDF无水印无限制

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一、jar破解

1.项目远程仓库配置

aspose-cells 这个需要配置单独的仓库地址才能下载，不会配置的可以去官网直接下载jar引入项目代码中。

<repositories>        <repository>            <id>AsposeJavaapi</id>            <name>Aspose Java API</name>            <url>https://repository.aspose.com/repo/</url>        </repository>    </repositories>

2.pom文件引入相关依赖

        <!-- Https://mvnrepository.com/artifact/com.aspose/aspose-cells -->        <dependency>            <groupId>com.aspose</groupId>            <artifactId>aspose-cells</artifactId>            <version>21.8</version>        </dependency>       <dependency>            <groupId>org.javassist</groupId>            <artifactId>javassist</artifactId>            <version>3.20.0-GA</version>        </dependency>

Javassist是一个开源的分析、编辑和创建Java字节码的类库。 

3.代码破解 

import javassist.*; import java.io.*;import java.util.ArrayList;import java.util.Enumeration;import java.util.List;import java.util.jar.JarEntry;import java.util.jar.JarFile;import java.util.jar.JarOutputStream; public class ExcelJarCrack {    public static void main(String[] args) throws Exception {        String jarPath = "C:\\Users\\liuya\\Desktop\\jar\\aspose-cells-21.8.jar";        crack(jarPath);    }     private static void crack(String jarName) throws NotFoundException, CannotCompileException, IOException {        //这一步是完整的jar包路径        ClassPool.getDefault().insertClassPath(jarName);        CtClass LicenseClass = ClassPool.getDefault().getCtClass("com.aspose.cells.License");        CtMethod[] aMethods = LicenseClass.getDeclaredMethods("a");        for (CtMethod aMethod : aMethods) {            CtClass returnType=aMethod.getReturnType();            if(returnType.getName().equals("boolean")){                aMethod.setBody("{return true;}");                break;            }        }        //将文件名命名成备份文件       File file=new File(jarName);       LicenseClass.writeFile(file.getParent());       disposeJar(jarName);    }     private static void disposeJar(String jarName) {        List<String> deletes = new ArrayList<>();        deletes.add("META-INF/37E3C32D.SF");        deletes.add("META-INF/37E3C32D.RSA");        List<String> replaces = new ArrayList<>();        replaces.add("com/aspose/cells/License.class");        File oriFile = new File(jarName);        if (!oriFile.exists()) {            System.out.println("######Not Find File:" + jarName);            return;        }        //将文件名命名成备份文件        String bakJarName = jarName.substring(0, jarName.length() - 3) + "cracked.jar";        try {            //创建文件（根据备份文件并删除部分）            JarFile jarFile = new JarFile(jarName);            JarOutputStream jos = new JarOutputStream(new FileOutputStream(bakJarName));            Enumeration entries = jarFile.entries();            while (entries.hasMoreElements()) {                JarEntry entry = (JarEntry) entries.nextElement();                if (!deletes.contains(entry.getName())) {                    if(replaces.contains(entry.getName())){                        System.out.println("Replace:-------" +entry.getName());                        JarEntry jarEntry = new JarEntry(entry.getName());                        jos.putNextEntry(jarEntry);                        FileInputStream fin = new FileInputStream(oriFile.getParent()+ "/"+entry.getName());                        byte[] bytes = readStream(fin);                        jos.write(bytes, 0, bytes.length);                    }else {                        jos.putNextEntry(entry);                        byte[] bytes = readStream(jarFile.getInputStream(entry));                        jos.write(bytes, 0, bytes.length);                    }                } else {                    System.out.println("Delete:-------" + entry.getName());                }            }            jos.flush();            jos.close();            jarFile.close();        } catch (FileNotFoundException e) {            e.printStackTrace();        } catch (IOException e) {            e.printStackTrace();        } catch (Exception e) {            e.printStackTrace();        }    }      private static byte[] readStream(InputStream inStream) throws Exception {        ByteArrayOutputStream outSteam = new ByteArrayOutputStream();        byte[] buffer = new byte[1024];        int len = -1;        while ((len = inStream.read(buffer)) != -1) {            outSteam.write(buffer, 0, len);        }        outSteam.close();        inStream.close();        return outSteam.toByteArray();    } }

修改为你本机的aspose-cells-21.8.jar路径，然后运行主方法，破解成功后，会再同级文件夹下生成一个aspose-cells-21.8.cracked.jar包，用这个包替换原来的aspose-pdf-21.8.jar包即可。

二、Excel转PDF

1.代码实现

import com.aspose.cells.License;import com.aspose.cells.SaveFORMat;import com.aspose.cells.Workbook; import java.io.FileOutputStream; public class PdfUtils {     public static void main(String[] args) {        excelToPdf("C:\\Users\\liuya\\Desktop\\excel\\test.xlsx");    }         public static void excelToPdf(String excelPath) {        License license = new License();        license.setLicense("C:\\Users\\liuya\\Desktop\\jar\\Aspose.License.xml");        long old = System.currentTimeMillis();        try {            //新建一个pdf文档            String pdfPath=excelPath.substring(0,excelPath.lastIndexOf("."))+".pdf";            //Excel文件数据            Workbook wb = new Workbook(excelPath);            FileOutputStream fileOS = new FileOutputStream(pdfPath);            //保存为pdf文件            wb.save(fileOS, SaveFormat.PDF);            fileOS.close();            //转化用时            long now = System.currentTimeMillis();            System.out.println("EXCEL 转 Pdf 共耗时：" + ((now - old) / 1000.0) + "秒");        } catch (Exception e) {            e.printStackTrace();        }    } }

2.Aspose.License.xml 授权文件

代码如下：

<License>    <Data>        <LicensedTo>Aspose Scotland Team</LicensedTo>        <EmailTo>billy.lundie@aspose.com</EmailTo>        <LicenseType>Developer OEM</LicenseType>        <LicenseNote>Limited to 1 developer, unlimited physical locations</LicenseNote>        <OrderID>140408052324</OrderID>        <UserID>94236</UserID>        <OEM>This is a redistributable license</OEM>        <Products>            <Product>Aspose.Total for Java</Product>        </Products>        <EditionType>Enterprise</EditionType>        <SerialNumber>9a59547c-41f0-428b-ba72-7c4368f151d7</SerialNumber>        <SubscriptionExpiry>20221231</SubscriptionExpiry>        <LicenseVersion>3.0</LicenseVersion>        <LicenseInstructions>http://www.aspose.com/corporate/purchase/license-instructions.aspx</LicenseInstructions>    </Data>    <Signature>FO3PHsblgDt8F59sMT1l1amyi9qk2V6E8dQkIP7LdTjsxDibNEFu1zOinQbqFfKv/ruttvcxoROkc1tUe0DtO6cP1Zf6J0VemgSY8i/LZECTGszRqJVQRZ0MoVnBhuPAJk5eli7fhVcF8hWd3E4XQ3LzfmJCuaj2NEteRi5Hrfg=</Signature></License>

因为jar已破解其核心验证方法，里面的签名可以随便填写，但是格式尽量保持一致，因为验证其他的格式方法还在！

运行成功截图

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