Intellij Java：java.lang.NoClassDefFoundError：org/json/JSONException

Question

I need help. I spent several hours trying to solve this problem but I can't. I code on Intellij Community Edition 2018.2 OS Windows 10, here is my java project structure.

my Main.java source:

package id.simko;

public class Main {

    public static void main(String[] args) {
        System.out.println("Hello World!");

        SqlServerConn sqlServerConn = new SqlServerConn();
        sqlServerConn.connectDbSqlServer();
        sqlServerConn.selectSqlServer();
    }
}

SqlServerConn.java:

package id.simko;

import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

import java.sql.*;

class SqlServerConn {
    private Connection conn;

    void connectDbSqlServer() {

        String db_connect_string = "jdbc:sqlserver://localhost";
        String db_name = "db1";
        String db_userid = "sa";
        String db_password = "sa";

        try {
            Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
            conn = DriverManager.getConnection(db_connect_string+";databaseName="+db_name,
                    db_userid, db_password);
            System.out.println("connected to sql server");
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    void selectSqlServer(){
        Statement statement;
        try {
            // ... skipped for clarity
        } catch (SQLException e) {
            e.printStackTrace();
        }
    }
}

my MANIFEST.MF:

Manifest-Version: 1.0
Main-Class: id.simko.Main

My pom.xml:

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>id.simko</groupId>
    <artifactId>replicator</artifactId>
    <version>1.0-SNAPSHOT</version>

    <dependencies>
        <dependency>
            <groupId>com.microsoft.sqlserver</groupId>
            <artifactId>mssql-jdbc</artifactId>
            <version>7.0.0.jre8</version>
        </dependency>
    </dependencies>

</project>

I configured File -> Project Structure -> Artifacts, and added libs/java-json.jar.

Then lastly, on Intellij I clicked Build -> Build Artifacts -> replicator.jar -> Build. And my executable jar was created successfully.

But when I tried to run it, error happens. here is the screenshot.

please help.. I know this question already answered here: Java: NoClassDefFoundError: org/json/JSONException but the solution cannot solve my problem. maybe this is a bug from intellij?

====================================================================

LAST UPDATE FROM ME: I tried for hours until I give up. For now, the only possible way to create an executable application out of java project in Windows 10 is by NOT using Intellij CE 2018.2. I tried NetBeans 8.2 IDE and I successfully created executable bat with gradle plugin & cygwin.

I will leave this question unanswered, because I know someday someone will have a way, but for now I give up and tried a different IDE, at least for creating executable.

Answer 1

I was facing same issue. After spending hours, I found a solution to resolve this issue. What I need to do was:

Go to : File -> Project Structure -> Liabraries Add "org.springframework.boot:spring-boot-configuration-processor:2.3.4.RELEASE" in liabraries.

Now clean, build and run the project

Note: You can change the version of above package

Answer 2

将 jar 文件放在 lib 文件夹下，因为在运行时它无法识别您的 jar 我认为是这样..

Answer 3

Open your replicator.jar (can use WinRAR) and see whether the class JSONException is available inside the jar. If not you need to include that inside your jar. For that you can use maven shade( https://maven.apache.org/plugins/maven-shade-plugin/ ) plugin or assemble plugin( http://maven.apache.org/plugins/maven-assembly-plugin/ ) to include all dependent classes into your executable jar.

This post would help you Including dependencies in a jar with Maven

Answer 4

In order to resolve the issue, here what I've done :

Remove Some IDE files/folders

I deleted the .idea folder and the .iml file containing the project name. Files and folder to delete

Reset Intellij Cash and restart Intellij

Invalidate cache step 1	Invalidate cache step 2

Reload Maven project

Reload maven project

That how I solve most of my Intellij IDEA Issues

Answer 5

My solution to this issue using Intellij was to create a library folder/directory "lib" and I included the JSON jar file.

File > Project Structure > Artifacts

enter image description here