如何使用自定义字体从 servlet 使用 iText+XMLWorker 创建 PDF?
How to create a PDF with iText+XMLWorker from servlet using custom font?
使用 iText/XMLWorker 个示例(主要是 this one),我可以轻松编写简单的应用程序,能够使用我自己的额外字体从 HTML 代码创建 PDF 文件,但一旦试图在一些网络服务代码中使用我的东西,我以异常结束,如:
Table 'name' does not exist in file:/C:/work/MyServer/target/classes/fonts/My%20Font.ttf
ExceptionConverter: com.itextpdf.text.DocumentException: Table 'name' does not exist in file:/C:/work/MyServer/target/classes/fonts/My%20Font.ttf
...这似乎指出在 Web 服务上下文中,无法按预期加载字体文件。这是我的大部分代码:
public HtmlRenderer(final String css, final String[] fontPaths) {
// fontPaths = {
// "/fonts/My Font.ttf",
// "/fonts/My Other Font.ttf",
// ...
// };
// CSS
cssResolver = new StyleAttrCSSResolver();
if (css != null) {
final CssFile cssFile = XMLWorkerHelper.getCSS(new ByteArrayInputStream(css.getBytes()));
cssResolver.addCss(cssFile);
}
// HTML
XMLWorkerFontProvider fontProvider = new XMLWorkerFontProvider(XMLWorkerFontProvider.DONTLOOKFORFONTS);
if (fontPaths != null) {
for (final String fontPath : fontPaths) {
final String path = this.getClass().getResource(fontPath).toExternalForm();
fontProvider.register(path);
}
}
CssAppliers cssAppliers = new CssAppliersImpl(fontProvider);
htmlContext = new HtmlPipelineContext(cssAppliers);
htmlContext.setTagFactory(Tags.getHtmlTagProcessorFactory());
...
我应该依赖这样的东西吗:
- 从临时文件中的资源中提取字体(参见 here)
- 然后,在自定义字体工厂中预加载字体(参见 there)
我不得不指示 Maven 对资源字体文件进行文字复制(常规过滤过程会更改文件并破坏字体):
<resources>
<resource>
<filtering>true</filtering>
<directory>src/main/resources</directory>
<excludes>
<exclude>**/*.ttf</exclude>
</excludes>
</resource>
<resource>
<filtering>false</filtering>
<directory>src/main/resources</directory>
<includes>
<include>**/*.ttf</include>
</includes>
</resource>
...
</resources>
使用 iText/XMLWorker 个示例(主要是 this one),我可以轻松编写简单的应用程序,能够使用我自己的额外字体从 HTML 代码创建 PDF 文件,但一旦试图在一些网络服务代码中使用我的东西,我以异常结束,如:
Table 'name' does not exist in file:/C:/work/MyServer/target/classes/fonts/My%20Font.ttf
ExceptionConverter: com.itextpdf.text.DocumentException: Table 'name' does not exist in file:/C:/work/MyServer/target/classes/fonts/My%20Font.ttf
...这似乎指出在 Web 服务上下文中,无法按预期加载字体文件。这是我的大部分代码:
public HtmlRenderer(final String css, final String[] fontPaths) {
// fontPaths = {
// "/fonts/My Font.ttf",
// "/fonts/My Other Font.ttf",
// ...
// };
// CSS
cssResolver = new StyleAttrCSSResolver();
if (css != null) {
final CssFile cssFile = XMLWorkerHelper.getCSS(new ByteArrayInputStream(css.getBytes()));
cssResolver.addCss(cssFile);
}
// HTML
XMLWorkerFontProvider fontProvider = new XMLWorkerFontProvider(XMLWorkerFontProvider.DONTLOOKFORFONTS);
if (fontPaths != null) {
for (final String fontPath : fontPaths) {
final String path = this.getClass().getResource(fontPath).toExternalForm();
fontProvider.register(path);
}
}
CssAppliers cssAppliers = new CssAppliersImpl(fontProvider);
htmlContext = new HtmlPipelineContext(cssAppliers);
htmlContext.setTagFactory(Tags.getHtmlTagProcessorFactory());
...
我应该依赖这样的东西吗:
- 从临时文件中的资源中提取字体(参见 here)
- 然后,在自定义字体工厂中预加载字体(参见 there)
我不得不指示 Maven 对资源字体文件进行文字复制(常规过滤过程会更改文件并破坏字体):
<resources>
<resource>
<filtering>true</filtering>
<directory>src/main/resources</directory>
<excludes>
<exclude>**/*.ttf</exclude>
</excludes>
</resource>
<resource>
<filtering>false</filtering>
<directory>src/main/resources</directory>
<includes>
<include>**/*.ttf</include>
</includes>
</resource>
...
</resources>