问题备忘: class path resource [xx] cannot be resolved to absolute file path because-白红宇

问题描述

测试服务的版本是Spring Cloud Dalston.SR5 在Spring Boot中配置https时，代码如下：

@Bean    @ConditionalOnExpression("#{ ${self.https.enable:false}}")    public EmbeddedServletContainerFactory servletContainer() {        TomcatEmbeddedServletContainerFactory tomcat = new TomcatEmbeddedServletContainerFactory();        tomcat.addAdditionalTomcatConnectors(createSslConnector());        return tomcat;    }    private Connector createSslConnector() {        Connector connector = new Connector("org.apache.coyote.http11.Http11NioProtocol");        Http11NioProtocol protocol = (Http11NioProtocol) connector.getProtocolHandler();        ClassPathResource resource = new ClassPathResource(".keystore");        try {            connector.setScheme("https");            connector.setSecure(true);            connector.setPort(port);            protocol.setSSLEnabled(true);            protocol.setKeystoreFile(resource.getFile().getAbsolutePath());            protocol.setKeystorePass(keystorePass);            protocol.setKeyAlias(keyAlias);            protocol.setKeyPass(keyPass);        } catch (IOException e) {            e.printStackTrace();        }        return connector;    }复制代码

以上代码在我们idea中运行服务时，可以正常执行。但是将服务打包成可执行jar的包，以jar服务运行服务时，抛出以下错误：

java.io.FileNotFoundException: class path resource [.keystore] cannot be resolved to absolute file path because it does not reside in the file system: jar:file:/D:/tmp/interfacee-1.0-SNAPSHOT.jar!/BOOT-INF/classes!/.keystore        at org.springframework.util.ResourceUtils.getFile(ResourceUtils.java:215)        at org.springframework.core.io.AbstractFileResolvingResource.getFile(AbstractFileResolvingResource.java:53)复制代码

出现以上问题的原因：打包后Spring无法使用resource.getFile()访问JAR中的路径的文件，必须使用resource.getInputStream()。

修正代码：通过resource.getInputStream()获取证书文件，然后存储到临时文件，最后Http11NioProtocol 实例通过这个临时文件的路径传入值，这样此Http11NioProtocol 实例可以获取此证书文件。

private Connector createSslConnector() {      Connector connector = new Connector("org.apache.coyote.http11.Http11NioProtocol");      Http11NioProtocol protocol = (Http11NioProtocol) connector.getProtocolHandler();      ClassPathResource resource = new ClassPathResource(".keystore");      // 临时目录      String tempPath =System.getProperty("java.io.tmpdir") + System.currentTimeMillis()+".keystore";      File f = new File(tempPath);      logger.info(".keystore目录临时存储路径" + tempPath);      try {          // 将key的值转存到临时文件          IOUtils.copy(resource.getInputStream(),new FileOutputStream(f));          connector.setScheme("https");          connector.setSecure(true);          connector.setPort(port);          protocol.setSSLEnabled(true);          // 指向临时文件          protocol.setKeystoreFile(f.getAbsolutePath());          protocol.setKeystorePass(keystorePass);          protocol.setKeyAlias(keyAlias);          protocol.setKeyPass(keyPass);      } catch (IOException e) {          e.printStackTrace();      }      return connector;  }复制代码