How to use java to make a word to convert pictures function

Preface

Use Java to implement Word to picture function, and you can convert directly through the library to avoid the performance loss of intermediate to PDF. The following are the specific implementation plans and precautions:

1. Core implementation steps

Introduce the library

Need to downloadFile (such asaspose-words-15.8.), recommended to obtain it from the official website or trusted sources.

&lt;!-- MavenDependency example(Need to manually install locallyJAR) --&gt;
&lt;dependency&gt;
    &lt;groupId&gt;&lt;/groupId&gt;
    &lt;artifactId&gt;aspose-words&lt;/artifactId&gt;
    &lt;version&gt;15.8.0&lt;/version&gt;
    &lt;scope&gt;system&lt;/scope&gt;
    &lt;systemPath&gt;${}/lib/aspose-words-15.8.&lt;/systemPath&gt;
&lt;/dependency&gt;

Authorization Verification (Avoid Watermark)

License file needs to be loaded (you can skip it if there is no commercial requirement, but there will be a watermark):

 license = new ();
try {
    ("");
} catch (Exception e) {
    ();
}

Convert code example

public void convertWordToImages(String wordPath, String outputDir) throws Exception {
    Document doc = new Document(wordPath);
    ImageSaveOptions options = new ImageSaveOptions();
    (300); // Set resolution    (true); // High-quality rendering
    // Generate pictures page by page (save each page as a separate file)    for (int pageIndex = 0; pageIndex &lt; (); pageIndex++) {
        (pageIndex);
        (outputDir + "/page_" + (pageIndex + 1) + ".png", options);
    }
}

2. Things to note

Pagination processing

passgetPageCount()Get the total number of pages, set page by pagesetPageIndex()Generate paging pictures.

Some versions of the API may need to be adjusted (such as higher versions may be used().getPageCount())。

Chinese garbled problem

Make sure the system is equipped with Chinese fonts (such as Song font and Microsoft Yahei).

Specify the font path in the code (if required):

("/usr/share/fonts", true);

Performance optimization

It is recommended to load in batches when processing large documents to avoid memory overflow.

Use thread pools to handle conversion tasks asynchronously.

3. Comparison of alternative solutions

method	advantage	shortcoming
	Directly transfer pictures, high efficiency	Need to crack authorization (commercial use requires a fee)
POI + PDFBox	Free open source	Low conversion quality, complex pagination control
OpenOffice Service	Supports multiple formats	Need to deploy external services and rely on the environment

4. Frequently Asked Questions

Unable to load Aspose library: Check whether the JAR version matches the JDK version.
Blurry picture: Turn upsetResolution(600)Or enablesetUseHighQualityRendering(true)。
Conversion failed: Check whether the Word document is corrupt, or try to convert PDF first to images using Aspose.

Through the above solutions, the Word to image conversion function can be efficiently realized. The complete code and dependency package can be used for reference. It is recommended to use small document verification logic first during testing.

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