javaOpenOffice详细介绍

一、javaOpenOffice简介

JavaOpenOffice是一组基于Java平台的API以及OpenOffice软件的应用程序，允许你操作OpenOffice开放源码软件。

JavaOpenOffice实现了OpenOffice的所有功能，包括文本编辑、表格编辑、幻灯片演示等等，同时还支持与Microsoft Office和PDF文件的互操作性。

与Windows和Mac OS X平台兼容，JavaOpenOffice在许多行业中使用非常广泛，比如文本处理任务、办公自动化以及大规模文件转换。

二、JavaOpenOffice的主要功能

首先，JavaOpenOffice通过开放源代码开发大大降低了开发自定义文档格式或者解析第三方文档的成本。其次，JavaOpenOffice具有完整的操控文档的API，使得其能够满足领域内许多的标准结构以及操作要求。最后，JavaOpenOffice的跨平台性使得其更加灵活，能够在多个平台轻松进行部署和运行。

三、JavaOpenOffice的应用实例

下面展示一个使用JavaOpenOffice进行PDF文件转换为图片的示例代码：

import com.sun.star.beans.PropertyValue;
import com.sun.star.beans.XPropertySet;
import com.sun.star.frame.XComponentLoader;
import com.sun.star.frame.XStorable;
import com.sun.star.io.IOException;
import com.sun.star.lang.XComponent;
import com.sun.star.uno.Exception;

import java.io.FileOutputStream;
import java.io.OutputStream;

public class PDFToImage {

    public void convert(String filePath, int page, String outputPath) throws Exception {

        XComponent component = OpenOfficeConnection.getPooledConnection().loadComponentFromURL(
                "file:///" + filePath, "_blank", 0, new PropertyValue[0]);
        XStorable xStorable = (XStorable) UnoRuntime.queryInterface(XStorable.class, component);
        PropertyValue[] convertProperties = new PropertyValue[3];
        convertProperties[0] = new PropertyValue();
        convertProperties[0].Name = "FilterName";
        convertProperties[0].Value = "writer_pdf_Export";
        convertProperties[1] = new PropertyValue();
        convertProperties[1].Name = "PageRange";
        convertProperties[1].Value = page + "-" + page;
        convertProperties[2] = new PropertyValue();
        convertProperties[2].Name = "Version";
        convertProperties[2].Value = "1.5";
        XPropertySet xPropertySet = (XPropertySet) UnoRuntime.queryInterface(XPropertySet.class,
                xStorable);
        xPropertySet.setPropertyValue("Hidden", Boolean.TRUE);
        xPropertySet.setPropertyValue("FilterName", convertProperties[0].Value);
        xStorable.storeToURL("file:///" + outputPath, convertProperties);
        XComponentLoader loader = (XComponentLoader) UnoRuntime.queryInterface(XComponentLoader.class,
                OpenOfficeConnection.getPooledConnection().getDesktop());
        PropertyValue[] loadProperties = new PropertyValue[2];
        loadProperties[0] = new PropertyValue();
        loadProperties[0].Name = "Hidden";
        loadProperties[0].Value = Boolean.TRUE;
        loadProperties[1] = new PropertyValue();
        loadProperties[1].Name = "ReadOnly";
        loadProperties[1].Value = Boolean.TRUE;
        component = loader.loadComponentFromURL("file:///" + outputPath, "_blank", 0, loadProperties);
        XStorable xStorableOut = (XStorable) UnoRuntime.queryInterface(XStorable.class, component);
        OutputStream outputStream = new FileOutputStream(outputPath + ".jpg");
        try {
            xStorableOut.storeToURL("private:stream", convertProperties);
            byte[] buffer = new byte[32768];
            while (true) {
                int read = outputStream.read(buffer);
                if (read == -1) {
                    break;
                }
                outputStream.write(buffer, 0, read);
            }
        } finally {
            if (outputStream != null) {
                outputStream.close();
            }
        }
    }
}

四、小结

JavaOpenOffice是一个非常优秀的开放源码软件，能够帮助开发人员更加灵活、便捷地处理和操控文档，并且简化许多领域的重复性操作。