java.lang.ClassNotFoundException: org.postgresql.Driver, Android

java.lang.classnotfoundexception org.postgresql.driver maven
java.lang.classnotfoundexception org.postgresql.driver pyspark
java.lang.classnotfoundexception org.postgresql.driver intellij
java lang noclassdeffounderror org postgresql jdbc timestamputils parsedbinarytimestamp
caused by: java lang illegalstateexception cannot load driver class: org postgresql driver
org.postgresql.driver class not found
exception in thread main java lang classnotfoundexception org postgresql driver eclipse
postgresql java

I am running Eclipse on Windows.

Following this tutorial I downloaded JDBC4, added it to my build path using Project>Properties>add External JAR, browsed for the file, it worked (.classpath file shows the correct lib path).

The package appears in my Referenced Libraries folder, so I continue the tutorial.

    import java.sql.Connection;
    import java.sql.DriverManager;
    import java.sql.PreparedStatement;
    import java.sql.SQLException;

    ....

    public void open ()
        {
    try {
        Class.forName("org.postgresql.Driver");
    } catch (ClassNotFoundException e) {
        e.printStackTrace();
    }

    try {
        conn = DriverManager.getConnection(url, username, password);
    } catch (SQLException e) {
        e.printStackTrace();
    }
}

I think it would be as simple as that but I get hit with this big long stack trace starting with

    java.lang.ClassNotFoundException: org.postgresql.Driver

(I can provide more if needed)

I tried include org.postgresql.*; but that didn't help either. I have also tried the JDBC3 but no luck there either.

I looked at Driver JDBC PostgreSQL with Android which provided a vague answer saying I would be better off just using HTTP+JSON. Which I have never used.

I'm brand new to Android, postgresql, web development, so a simple answer would be appreciated.

You need to add the PostgreSQL JDBC Driver in your project as mentioned in Mvnrepository.

Gradle:

// http://mvnrepository.com/artifact/postgresql/postgresql
compile group: 'postgresql', name: 'postgresql', version: '9.0-801.jdbc4'

Maven:

<dependency>
    <groupId>postgresql</groupId>
    <artifactId>postgresql</artifactId>
    <version>9.0-801.jdbc4</version>
</dependency>

You can also download the JAR and import to your project manually.

NOTE: Compile as used in this answer is deprecated. Replace with implementation as per 3.

java.lang.ClassNotFoundException: org.postgresql , Driver error comes when you are trying to connect to a PostgreSQL database from Java program but Java ClassLoader is not able to find the Driver class "org. postgresql. Driver" required to make the connection. Usually, this class is found in PostgreSQL JDBC driver JAR e.g. postgresql-9.4-1201. Well as always my mistakes are magical, created new project>copied over all the code, tried to run new projet with same code and library- didn't like library this time, said something about cannot open zip file when given postgresql-9.0-801.jdbc4.jar, double checked filename still no use, downloaded jdbc3.jar - and magic, as if nothing terrible happened, works as clocks.

You should put the jar package into the lib folder(WebContent-WEB-INF-lib),and right click on the jar package-build path-add to build path

Re: Still having trouble getting JDBC working, If the postgresql.jar file is not accessible to the Java runtime environment you will get a 'java.lang.ClassNotFoundException: org.postgresql.Driver' exception. Cause of java.lang.ClassNotFoundException: org.postgresql.Driver In order to connect to PostgreSQL database from Java, first step is to register the driver with DriverManager. Generally, Class.forName() method is used to find, load and register JDBC driver.

It's a CLASSPATH issue; the PostgreSQL JDBC driver isn't available when the class loader tries to load it. You need to add it to your CLASSPATH correctly.

If it works in Eclipse, it's because adding a JAR to the build path is adding it to the CLASSPATH. You have to understand how CLASSPATH works without the Eclipse training wheels to help you.

java.lang.ClassNotFoundException:org.postgresql.Driver,Android, Es un tema CLASSPATH; el controlador PostgreSQL JDBC no está disponible cuando el cargador de clases intenta cargarlo. Debe agregarlo a su  I have successfully connected and done these things in a different JAVA project. So I figured since Android is Java, I could just port over the relevant code, add the same build path for the driver, etc. But it gives me the error: java.lang.ClassNotFoundException: com.mysql.jdbc.Driver

Downloading and adding the JDBC JAR file to the built path of the tool you are using may be a temporary solution as none of the above solutions worked out in my case.

java.lang.ClassNotFoundException: org.postgresql.Driver, Android, microsoft.sqlserver.jdbc.SQLServerDriver in Java [solution]; How to fix java.lang.​ClassNotFoundException: org.postgresql.Driver error in Java? [  I am having some difficulty in making connectivity with Java and PostgreSQL Database.I have download the JDBC4 Postgresql Driver, Version 9.2-1002 driver and properly set the application ClassPath.

I faced the same problem; but the mistake I did was the postgre dependency I added only in plugins section; After adding the postgre dependency (the following) into the project dependencies section it worked.

<dependency>
<groupId>postgresql</groupId>
<artifactId>postgresql</artifactId>
<version>9.1-901-1.jdbc4</version>    
</dependency>

java.lang.ClassNotFoundException: com.mysql.jdbc.Driver [Solution , Then check out our detailed example on Java JDBC PostgreSQL Connection! You can PostgreSQL v10 and PostgreSQL JDBC driver v42.2.2 are used. Follow the /*catch (ClassNotFoundException e) { 7. Android UI Design java.lang.ClassNotFoundException: org.postgresql.Driver java.lang. @RichardT Android has come a way since I wrote this but I still think going via web services is almost always going to be the right answer. Even if you're only within an area with good WiFi it's still a pain dealing with stalls and dropouts in the JDBC connection.

java.lang.ClassNotFoundException:org.postgresql.Driver,Android , r/Kotlin: Discussion about Kotlin, a statically typed programming language for the JVM, Android, JavaScript, and native. I imported the latest verison of the postgresql jdbc driver using the maven dependency: java.lang.​ClassNotFoundException: org.postgresql. loadClass(ClassLoaders.java:190) at java.base/java.lang. java. lang. ClassNotFoundException: org. postgresql. Driver (Je peux fournir plus si nécessaire) J'ai essayé include org.postgresql.*; mais cela n'a pas aide non plus. J'ai aussi essayé le JDBC3 mais pas de chance il soit.

Java JDBC PostgreSQL Connection Example,

[Question] Problem with PostgreSQL JDBC Driver in Kotlin : Kotlin,

Comments
  • Did you place the .jar in a lib folder in stead of libs, by any chance? Since ADT r17, Libraries referenced from external locations will not be packaged into the .apk. The result is your project will compile fine, but at runtime you'll run into the NoClassDefFoundError because of the missing libraries. There are lots of similar Q&A's on SO by the way; e.g. this one.
  • Got it to work. A lot to learn :P Thanks!
  • Are you sure this is the correct one to use? mvnrepository.com/artifact/org.postgresql/postgresql
  • Version postgresql:postgresql:9.1-901-1.jdbc4 is extremely old. The latest version is org.postgresql:postgresql:42.2.5, see search.maven.org/search?q=g:org.postgresql%20AND%20a:postgresql