Obtaining an input stream from a classpath file

Question

After reading this question, I have tried the following when reading a file from the classpath of a maven project built with IntelliJ:

public class testTemplateManager {

private TemplateManager templateManager;
private String m_includePath;

public void createTemplateManager() {
    String relativePath = "/src/main/java/com/eprosima/templates";
    String fileName = "idlTypes.stg";
    String filePath = relativePath + "/" + fileName;
    ClassLoader classLoader = Thread.currentThread().getContextClassLoader();
    InputStream res = classLoader.getResourceAsStream(var4);
    if(res == null) {
        classLoader = this.getClass().getClassLoader();
        res = classLoader.getResourceAsStream(var4);
    }

    if(res != null) {
        return new BufferedReader(getInputStreamReader(res));
    }
}

The resource res is always null regardless of the relativePath(relative to the project root directory). I have tried to use the following paths with the same outcome:

String relativePath = "src/main/java/com/eprosima/templates";
String relativePath = "src/main/java/com.eprosima/templates";

The classpath looks like:

I need to read the template files located in /src/main/java/com/eprosima/templates.

score 1 · Answer 1 · answered Aug 04 '15 at 10:33

1

String relativePath = "/src/main/java/com/eprosima/templates";

The problem is here. src/main/java is not part of your classpath. It's not there in any way at runtime. It should be

String relativePath = "/com/eprosima/templates";

answered Aug 04 '15 at 10:33

user207421

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The output is still the same. res always remains null. – Sebi Aug 04 '15 at 14:06
Try it without the leading /. – user207421 Aug 05 '15 at 02:38

score -1 · Answer 2 · answered Aug 05 '15 at 01:57

Try this

String relativePath = "./src/main/java/com/eprosima/templates";

For example I have project that has package com.example.main. In that package I have "FileTest.java" with following code:

package com.example.main;

import java.io.File;

public class FileTest {

/**
 * @param args
 */
public static void main(String[] args) {
    File file = new File("./src/com/example/main/FileTest.java");
    if (file.exists()) {
        System.out.println("existed!");
    } else {
        System.out.println("not exists!");
    }
}

}

then run this file output prints "existed!"

Hope this help!

It won't. The src directory won't be there at runtime, outside the IDE. — user207421, Aug 05 '15 at 02:38

Obtaining an input stream from a classpath file

2 Answers2