运行jar时找不到类路径中的资源

Question

我需要将密钥库路径作为库构造函数参数的一部分传递给第三方库。 我将密钥库（samplecerts）保留在类路径（src / main / resources）中

我只是在测试行的下面添加了一行，以查看文件是否真的被加载，以及是否将正确的路径发送给第三方

    InputStream in =  new FileInputStream(path);

遵循两种方法-

方法1：获取绝对路径-

  URL url =  MyTest.class.getClassLoader().getResource("samplecerts");
  String path = url.getPath();
  System.out.println("Cert File Path:" +path);
  InputStream in =  new FileInputStream(path);

低于错误

 /usr/local/java/bin/java -cp my-jar-with-dependencies.jar com.sample.MyTest
 Cert File Path:file:/home/abc/my-jar-with-dependencies.jar!/samplecerts
   Exception in thread "main" java.io.FileNotFoundException: file:/home/abc/my-jar-with-dependencies.jar!/samplecerts (No such file or directory)
    at java.io.FileInputStream.open0(Native Method)
    at java.io.FileInputStream.open(FileInputStream.java:195)
    at java.io.FileInputStream.<init>(FileInputStream.java:138)
    at java.io.FileInputStream.<init>(FileInputStream.java:93)
    at com.sample.MyTest.main(MyTest.java:33)

方法2：在（src / main / resources /）下的classpath中提供文件名

String path = "samplecerts";
System.out.println("Cert File Path:" +path);
InputStream in =  new FileInputStream(path);

得到了以下错误-

/usr/local/java/bin/java -cp my-jar-with-dependencies.jar com.sample.MyTest
Cert File Path:samplecerts
Exception in thread "main" java.io.FileNotFoundException: samplestore (No such file or directory)
 at java.io.FileInputStream.open0(Native Method)
 at java.io.FileInputStream.open(FileInputStream.java:195)
 at java.io.FileInputStream.<init>(FileInputStream.java:138)
 at java.io.FileInputStream.<init>(FileInputStream.java:93)
 at com.sample.MyTest.main(MyTest.java:33)

在eclipse中，如果以Java程序运行，则可以正常工作。 这些错误的原因可能是什么，以及如何使其起作用？

Answer 1

例如，如果您的samplecerts位于jar的/org/whatever/security/ ，则可以这样加载它：

final String myPath = "/org/whatever/security/samplecerts";
InputStream myCerts = getClass().getResourceAsStream(myPath);