问题备忘: class path resource [xx] cannot be resolved to absolute file path because it does not reside

我会带着你远行 2022-05-18 07:44 156阅读 0赞

**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;
        }

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/interface
    e-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)

**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;
      }

问题备忘: class path resource [xx] cannot be resolved to absolute file path because it does not reside

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