英文:
What error am I making with the ClassLoader getResources?
问题
我已经编写了以下代码来测试我的代码中的一个方法。为了创建 s3Event，我有一个 JSON 文件，但是当我使用类加载器时，总是返回一个空异常。可能是我将绝对路径弄错了？我已经附加了一张图片，以显示文件路径布局，以防这是错误。
@Test
@DisplayName("Testing the handleRequest")
void testTheHandleRequest() throws URISyntaxException, IOException {
ClassLoader classLoader = getClass().getClassLoader();
File file = new File(Objects.requireNonNull(classLoader.getResource("s3Event.json")).toURI());
S3Event s3Event = new ObjectMapper().readValue(file, S3Event.class);
Context context = null;
LambdaHandler lambdaHandler = new LambdaHandler();
assertEquals("Finished handleRequest()", lambdaHandler.handleRequest(s3Event, null));
}
英文:
I have written the following code to test a method within my code. To create the s3Event, I have a json file but when I use the class loader I am always returned a null exception. It could be possible I have the absolute path incorrect? I have attached an image to show the file pathway layout in case this is the mistake.
@Test
@DisplayName("Testing the handleRequest")
void testTheHandleRequest() throws URISyntaxException, IOException {
ClassLoader classLoader = getClass().getClassLoader();
File file = new File(Objects.requireNonNull(classLoader.getResource("s3Event.json")).toURI());
S3Event s3Event = new ObjectMapper().readValue(file, S3Event.class);
Context context = null;
LambdaHandler lambdaHandler = new LambdaHandler();
assertEquals ("Finished handleRequest()", lambdaHandler.handleRequest(s3Event, null));
}
答案1
得分: 1
我唯一能找到的问题在于项目结构。Maven对于默认结构src/test/resources支持默认的ClassLoader资源行为，然而在你的情况下，文件夹名为src/test/java/testResources，这需要在POM或程序中进行额外的配置。
我的项目文件夹结构如下，
@Test
@DisplayName("Testing on the classloader")
public void testOnClassLoader() throws URISyntaxException {
ClassLoader cl = getClass().getClassLoader();
File file = new File(Objects.requireNonNull(cl.getResource("sample.json").toURI()));
if(file != null) {
System.out.println("File found " + file.getAbsolutePath());
assertEquals(true, true);
}
}
输出：
-------------------------------------------------------
T E S T S
-------------------------------------------------------
Running JsonLoaderTest
File found ~\resource-access\target\test-classes\sample.json
Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.139 sec
Results :
Tests run: 1, Failures: 0, Errors: 0, Skipped: 0
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 7.007 s
[INFO] Finished at: 2020-05-05T12:51:02+05:30
[INFO] ------------------------------------------------------------------------
希望对你有所帮助。
英文:
The only problem I could find is in the project structure. Maven supports the default ClassLoader resource behaviour for the default structure src/test/resources, whereas in your case the folder name is src/test/java/testResources, which requires additional configurations to be made either in POM or in program.
My project folder structure is given below,
@Test
@DisplayName("Testing on the classloader")
public void testOnClassLoader() throws URISyntaxException {
ClassLoader cl = getClass().getClassLoader();
File file = new File(Objects.requireNonNull(cl.getResource("sample.json").toURI()));
if(file != null) {
System.out.println("File found "+ file.getAbsolutePath());
assertEquals(true, true);
}
}
Output:
-------------------------------------------------------
T E S T S
-------------------------------------------------------
Running JsonLoaderTest
File found ~\resource-access\target\test-classes\sample.json
Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.139 sec
Results :
Tests run: 1, Failures: 0, Errors: 0, Skipped: 0
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 7.007 s
[INFO] Finished at: 2020-05-05T12:51:02+05:30
[INFO] ------------------------------------------------------------------------
Hope this helps.
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