How to load properties file into Java?

Question

I am trying to load a properties file into Java present on linux dir. connection.properties:

hiveDriver=HiveDriver
hiveServer=ip-1-2-1-1.
hivePort=123
hiveUser=huser
hivePassword=etl123
gpDriver=org.postgresql.Driver
metaStoreUrl=metaurl
port=5432
metaUser=devusr
metaPassword=abcdefg
gpAnalyticsServer=1.2.3.4.5
gpUser=gpuser
gpPassword=09987665

Code:

import java.io.IOException;
import java.io.InputStream;
import java.util.Properties;

try {
    Properties props = new Properties();
    String propFile  = "/home/devuser/connection.properties";
    InputStream inputStream = StartCount.class.getClassLoader().getResourceAsStream(propFile);
    if(inputStream != null) {
        props.load(inputStream);
    }
    String hiveDriver           = props.getProperty("hiveDriver");
    String hiveServer           = props.getProperty("hiveServer");
    String hivePort             = props.getProperty("hivePort");
    String hiveUser             = props.getProperty("hiveUser");
    String hivePassword         = props.getProperty("hivePassword");
    String gpDriver             = props.getProperty("gpDriver");
    String hiveMetaStoreServer  = props.getProperty("hiveMetaStoreServer");
    String port                 = props.getProperty("port");
    String hiveMetaUser         = props.getProperty("hiveMetaUser");
    String hiveMetaPassword     = props.getProperty("hiveMetaPassword");
    String gpAnalyticsServer    = props.getProperty("gpAnalyticsServer");
    String gpUser               = props.getProperty("gpUser");
    String gpPassword           = props.getProperty("gpPassword");
    System.out.println(hiveDriver)      ;
    System.out.println(hiveServer);
    System.out.println(hivePort);
    System.out.println(hiveUser);
    System.out.println(hivePassword);
    System.out.println(gpDriver);
    System.out.println(hiveMetaStoreServer);
    System.out.println(port);
    System.out.println(hiveMetaUser);
    System.out.println(hiveMetaPassword);
    System.out.println(gpAnalyticsServer);
    System.out.println(gpUser);
    System.out.println(gpPassword); 
} catch(Exception e) {
    e.printStackTrace();
}

I am submitting the jar from the same place where "connection.properties" is saved. When I run the code, I see null printing from the println statements. Could anyone let me know what is the mistake I did in the code above ?

getResourceAsStream looks for a resource in the classpath, is the parent directory of "/home/connection.properties" in the classpath ? — Arnaud
– Arnaud, Commented Mar 29, 2019 at 11:29
Its "/home/devuser/connection.properties". I had it corrected. I should've checked it while posting the question. — Metadata
– Metadata, Commented Mar 29, 2019 at 11:44

Wulf · Accepted Answer · 2019-03-29 11:52:34Z

1

InputStream inputStream = new FileInputStream(propFile);

Thats it...

Because

StartCount.class.getClassLoader().getResourceAsStream(propFile) != propFile

edited Mar 29, 2019 at 11:52

answered Mar 29, 2019 at 11:31

Wulf

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Metadata Over a year ago

The compiler says: Cannot instantiate the type InputStream

Guilherme Alencar · Accepted Answer · 2019-03-29 11:40:04Z

0

Your problem is the path, try to replace for this:

String propFile  = "./connection.properties";

answered Mar 29, 2019 at 11:40

Guilherme Alencar

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Comments

hovanessyan · Accepted Answer · 2019-03-29 11:57:10Z

0

Using NIO2 you can load the file (if you have the read permissions) and convert it to InputStream like:

Path path = Paths.get("/home/devuser/connection.properties");
InputStream str = Files.newInputStream(path);

edited Mar 29, 2019 at 11:57

answered Mar 29, 2019 at 11:38

hovanessyan

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Metadata Over a year ago

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