无法理解 URL 以连接读取 svg 文件

Question

我有一个 Spring Boot v2.1.2.RELEASE 应用程序。我在 ../src/main/resources/icons/128/black/ae.png

中有一个文件

我想阅读，但出现错误：无法理解 URL 的连接

@SpringBootApplication
public class SvgManagerApplication implements CommandLineRunner {

    public static void main(String[] args) {
        SpringApplication.run(SvgManagerApplication.class, args);
    }


    @Override
    public void run(String... args) throws Exception {      

        try {

            String parser = XMLResourceDescriptor.getXMLParserClassName();
            SAXSVGDocumentFactory f = new SAXSVGDocumentFactory(parser);
            Document doc = f.createDocument("classpath:icons/128/black/ae.svg");

            System.out.println(doc);

        } catch (IOException ex) {

            System.out.println(ex.getMessage());

        }
    }
}

Answer 1

你可以试试这样获取路径：

String path = SvgManagerApplication.class.getClassLoader().getResource("icons/128/black/ae.svg").getPath();

Answer 2

您正在混合使用两种不同的框架； classpath: 与 Spring 有关，而 SAXSVGDocumentFactory 似乎与蜡染有关 (https://xmlgraphics.apache.org/batik/javadoc/org/apache/batik/anim/dom/SAXSVGDocumentFactory.html)

你可以这样做：

@SpringBootApplication
public class SvgManagerApplication implements CommandLineRunner {

    public static void main(String[] args) {
        SpringApplication.run(SvgManagerApplication.class, args);
    }


    @Override
    public void run(String... args) throws Exception {      

        try {
        Resource svg = new ClassPathResource("icons/128/black/ae.png"); 
            String parser = XMLResourceDescriptor.getXMLParserClassName();
            SAXSVGDocumentFactory f = new SAXSVGDocumentFactory(parser);
            Document doc = f.createDocument(SVG_DOCUMENT_URI, svg.getInputStream());

            System.out.println(doc);

        } catch (IOException ex) {

            System.out.println(ex.getMessage());

        }
    }
}

可以在此处找到有关资源的更多信息https://docs.spring.io/spring-framework/docs/current/javadoc-api/org/springframework/core/io/Resource.html, while more information about ClassPathResource can be found here https://docs.spring.io/spring-framework/docs/current/javadoc-api/org/springframework/core/io/ClassPathResource.html

无法理解 URL 以连接读取 svg 文件

Unable to make sense of URL for connection reading a svg file

java

spring

svg

batik

spring-boot