java调用libreoffice_JAVA实现LibreOffice转换PDF文档

可以使用LibreOffice的Java API来实现将LibreOffice文档转换为PDF文档。以下是实现的步骤：

1. 首先需要确保LibreOffice已经安装在系统中，并且已经配置好了环境变量。同时需要下载并安装LibreOffice的Java API。

2. 在Java程序中引入LibreOffice的Java API所在的jar包。

3. 使用以下代码将文档转换为PDF文档：

import com.sun.star.beans.PropertyValue;
import com.sun.star.frame.XComponentLoader;
import com.sun.star.lang.XComponent;
import com.sun.star.uno.UnoRuntime;
import com.sun.star.uno.XComponentContext;

public class ConvertToPDF {
    public static void main(String[] args) {
        XComponentContext xContext = null;
        try {
            //获取LibreOffice的上下文
            xContext = com.sun.star.comp.helper.Bootstrap.bootstrap();
            XComponentLoader xLoader = UnoRuntime.queryInterface(XComponentLoader.class,
                    xContext.getServiceManager().createInstanceWithContext("com.sun.star.frame.Desktop", xContext));

            //设置待转换文档的路径和文件名
            String fileToConvert = "file:///C:/example.docx";

            //设置转换后的PDF文档的路径和文件名
            String pdfFile = "file:///C:/example.pdf";

            //设置转换参数
            PropertyValue[] conversionProperties = new PropertyValue[2];
            conversionProperties[0] = new PropertyValue();
            conversionProperties[0].Name = "Hidden";
            conversionProperties[0].Value = Boolean.TRUE;
            conversionProperties[1] = new PropertyValue();
            conversionProperties[1].Name = "FilterName";
            conversionProperties[1].Value = "writer_pdf_Export";

            //打开待转换文档
            XComponent xComponent = xLoader.loadComponentFromURL(fileToConvert, "_blank", 0, conversionProperties);

            //将文档转换为PDF格式
            PropertyValue[] storeProperties = new PropertyValue[3];
            storeProperties[0] = new PropertyValue();
            storeProperties[0].Name = "FilterName";
            storeProperties[0].Value = "writer_pdf_Export";
            storeProperties[1] = new PropertyValue();
            storeProperties[1].Name = "Overwrite";
            storeProperties[1].Value = Boolean.TRUE;
            storeProperties[2] = new PropertyValue();
            storeProperties[2].Name = "Hidden";
            storeProperties[2].Value = Boolean.TRUE;
            UnoRuntime.queryInterface(XStorable.class, xComponent).storeToURL(pdfFile, storeProperties);

            //关闭文档
            UnoRuntime.queryInterface(XCloseable.class, xComponent).close(Boolean.TRUE);
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            if (xContext != null) {
                com.sun.star.uno.Runtime.getRuntime(xContext).freeUnusedLibraries();
            }
        }
    }
}

4. 运行程序即可将LibreOffice文档转换为PDF文档。