java caj转pdf

根据提供的引用内容，有两种方法可以将CAJ文件转换为PDF文件，分别是在线转换和使用CAJ Viewer软件打印为PDF。以下是Java实现在线转换的示例代码：

import java.io.*;
import java.net.HttpURLConnection;
import java.net.URL;

public class CajToPdf {
    public static void main(String[] args) {
        String cajUrl = "http://example.com/example.caj"; // 替换为CAJ文件的URL
        String pdfUrl = "http://example.com/example.pdf"; // 替换为PDF文件的URL
        try {
            URL url = new URL("http://www.caj2pdf.com/do.php");
            HttpURLConnection conn = (HttpURLConnection) url.openConnection();
            conn.setRequestMethod("POST");
            conn.setDoOutput(true);
            conn.setDoInput(true);
            conn.setUseCaches(false);
            conn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
            OutputStream out = conn.getOutputStream();
            String param = "url=" + cajUrl + "&pdf=" + pdfUrl;
            out.write(param.getBytes());
            out.flush();
            out.close();
            InputStream in = conn.getInputStream();
            BufferedReader reader = new BufferedReader(new InputStreamReader(in));
            String line;
            while ((line = reader.readLine()) != null) {
                System.out.println(line);
            }
            reader.close();
            conn.disconnect();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

另外，如果CAJ文件大小超过2MB，可以使用CAJ Viewer软件将其打印为PDF。以下是Java实现使用CAJ Viewer软件打印为PDF的示例代码：

import java.io.*;

public class CajToPdf {
    public static void main(String[] args) {
        String cajPath = "example.caj"; // 替换为CAJ文件的路径
        String pdfPath = "example.pdf"; // 替换为PDF文件的路径
        try {
            Runtime rt = Runtime.getRuntime();
            Process p = rt.exec("cmd /c start /wait CajViewer.exe /E /P /T \"" + cajPath + "\" \"" + pdfPath + "\"");
            InputStream in = p.getInputStream();
            BufferedReader reader = new BufferedReader(new InputStreamReader(in));
            String line;
            while ((line = reader.readLine()) != null) {
                System.out.println(line);
            }
            reader.close();
            p.waitFor();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}