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这篇“Java如何实现Excel文件转PDF无水印无限制”文章的知识点大部分人都不太理解，所以小编给大家总结了以下内容，内容详细，步骤清晰，具有一定的借鉴价值，希望大家阅读完这篇文章能有所收获，下面我们一起来看看这篇“Java如何实现Excel文件转PDF无水印无限制”文章吧。
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>
<!-- 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。
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。
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");
}
/**
* Excel文件转换
* @param excelPath 需要被转换的excel全路径带文件名
* @Return void
*/
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();
}
}
}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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