I'm trying to read a mdb file with jet encode with a very simple program.
import java.io.File;
import java.io.IOException;
import com.healthmarketscience.jackcess.CryptCodecProvider;
import com.healthmarketscience.jackcess.Database;
import com.healthmarketscience.jackcess.DatabaseBuilder;
import com.healthmarketscience.jackcess.Row;
import com.healthmarketscience.jackcess.Table;
public class ReadFile {
public static void main(String[] args) {
// TODO Auto-generated method stub
try {
File myDbFile = new File("C:\\Users\\jcace\\Downloads\\TSC\\DB1.mdb");
Database db = new DatabaseBuilder(myDbFile)
.setCodecProvider(new CryptCodecProvider())
.open();
Table table = db.getTable("VBV");
for(Row row : table) {
System.out.println("Look ma, a row: " + row);
}
} catch (IOException e){
e.printStackTrace();
}
}
}
and I have the following library extras
commons-logging-1.2\commons-logging-1.2.jar
commons-logging-1.2\commons-logging-1.2-javadoc.jar
commons-lang-2.6\commons-lang-2.6.jar
jackcess-encrypt-2.1.2.jar
hamcrest-core-1.3.jar
junit-4.11.jar
jackcess-2.1.0.jar
bcprov-jdk15on-1.49.jar
And when I ran the program I have the following Error
Exception in thread "main" java.lang.NoClassDefFoundError:
net/sourceforge/cobertura/coveragedata/TouchCollector
at com.healthmarketscience.jackcess.CryptCodecProvider.__cobertura_init(CryptCodecProvider.java)
at com.healthmarketscience.jackcess.CryptCodecProvider.<clinit>(CryptCodecProvider.java)
at HelloWorld.main(HelloWorld.java:17)
Caused by: java.lang.ClassNotFoundException: net.sourceforge.cobertura.coveragedata.TouchCollector
at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
... 3 more
I try with the following Bouncy crypt library
bcprov-jdk15on-157.jar
bcprov-jdk15on-152.jar
bcprov-jdk15on-151.jar
bcprov-jdk15on-150.jar
bcprov-jdk15on-149.jar
Finally I solved my problem changing the library jackcess-encrypt-2.1.2.jar by jackcess-encrypt-2.1.0.jar.
I don´t know why but this made me possible did this work.
Should be fixed in the jackcess-encrypt 2.1.3 release.
Related
When i try to read from excel file using apace poi i get the ClassNotFoundException followed by other errors and i have imported all the necessary jar files in the reference library
by the way i'm still new to coding
heres the code :
import java.io.*;
import java.io.File;
import java.io.FilterInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import org.apache.*;
import org.apache.poi.*;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.FormulaEvaluator;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
public class Test {
public static void main(String[] args) throws IOException {
// TODO Auto-generated method stub
FileInputStream F = new FileInputStream("Carbcounting.xlsx");
XSSFWorkbook wb = new XSSFWorkbook(F);
XSSFSheet sheet = wb.getSheetAt(0);
FormulaEvaluator formulaEva = wb.getCreationHelper().createFormulaEvaluator();
for(Row row : sheet){
for(Cell cell : row){
System.out.print(cell.getStringCellValue());
}
}
System.out.println();
}
}
and heres all the errors i'm getting when i try to run it :
Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/commons/collections4/ListValuedMap
at project.Test.main(Test.java:28)
Caused by: java.lang.ClassNotFoundException: org.apache.commons.collections4.ListValuedMap
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
... 1 more
You need to Add commons-collections4-x.x.jar file in your build path and try it again. It should work.
Get it from here: https://mvnrepository.com/artifact/org.apache.commons/commons-collections4/4.0
Also, just adding up:
You are getting this error(NoClassDefFoundError) majorly for two reasons:
Java Virtual Machine is not able to find a particular class at runtime which was available at compile time.
If a class was present during compile time but not available in java classpath during runtime.
This question already has answers here:
Why am I getting a NoClassDefFoundError in Java?
(31 answers)
Closed 6 years ago.
I'm so noob at external stuff to Bukkit programming, so I'm sorry if it's so easy to solve :P
I have a problem, and it's that when I try to use HikariCP in my project, it returns in an error (the title one).
I'm using it in a BungeeCord plugin.
The weird thing is that I have done this successfully couples of times, and I don't know why it isn't working this time.
The error / log:
06:13:36 [ADVERTENCIA] Exception encountered when loading plugin: DiverseReport java.lang.NoClassDefFoundError: com/zaxxer/hikari/HikariDataSource at net.srlegsini.DiverseReport.Bungee.MClass.onEnable(MClass.java:44) at net.md_5.bungee.api.plugin.PluginManager.enablePlugins(PluginManager.java:227) at net.md_5.bungee.BungeeCord.start(BungeeCord.java:272) at net.md_5.bungee.BungeeCordLauncher.main(BungeeCordLauncher.java:55) at net.md_5.bungee.Bootstrap.main(Bootstrap.java:15) Caused by: java.lang.ClassNotFoundException: com.zaxxer.hikari.HikariDataSource at net.md_5.bungee.api.plugin.PluginClassloader.loadClass0(PluginClassloader.java:53) at net.md_5.bungee.api.plugin.PluginClassloader.loadClass(PluginClassloader.java:27) at java.lang.ClassLoader.loadClass(Unknown Source) ... 5 more
My main class:
package net.srlegsini.DiverseReport.Bungee;
import java.io.File;
import java.io.IOException;
import java.sql.Connection;
import java.sql.SQLException;
import java.util.Arrays;
import com.zaxxer.hikari.HikariDataSource;
import net.md_5.bungee.BungeeCord;
import net.md_5.bungee.api.plugin.Plugin;
import net.md_5.bungee.config.Configuration;
import net.md_5.bungee.config.ConfigurationProvider;
import net.md_5.bungee.config.YamlConfiguration;
import net.srlegsini.DiverseReport.Bukkit.UUIDFetcher;
public class MClass extends Plugin {
static Configuration config;
static MClass plugin;
static HikariDataSource hikari;
static Connection connection;
public void onEnable() {
BungeeCord.getInstance().getPluginManager().registerListener(this, new ChannelListener());
BungeeCord.getInstance().registerChannel("Return");
loadCfg();
if (!config.contains("MySQL")) {
config.set("MySQL.Enable", false);
config.set("MySQL.Host", "localhost");
config.set("MySQL.Port", 3306);
config.set("MySQL.User", "user");
config.set("MySQL.Pass", "pass");
config.set("MySQL.Database", "Sr_DiverseReport");
}
saveCfg(getDataFolder());
hikari = new HikariDataSource();
hikari.setDataSourceClassName("com.mysql.jdbc.jdbc2.optional.MysqlDataSource");
hikari.addDataSourceProperty("serverName", config.getString("MySQL.Host"));
hikari.addDataSourceProperty("port", 3306);
hikari.addDataSourceProperty("databaseName", config.getString("MySQL.Database"));
hikari.addDataSourceProperty("user", config.getString("MySQL.User"));
hikari.addDataSourceProperty("password", config.getString("MySQL.Pass"));
try {
Class.forName("com.mysql.jdbc.Driver");
connection = hikari.getConnection();
} catch (SQLException e1) {
e1.printStackTrace();
} catch (ClassNotFoundException e2) {
}
saveCfg(getDataFolder());
}
public void loadCfg() {
try {
File file = new File(getDataFolder(), "config.yml");
if (!getDataFolder().exists()) {
getDataFolder().mkdir();
}
if (!file.exists()) {
file.createNewFile();
}
config = ConfigurationProvider.getProvider(YamlConfiguration.class)
.load(new File(getDataFolder(), "config.yml"));
} catch (IOException e) {
e.printStackTrace();
}
}
public static void saveCfg(File dataFolder) {
try {
ConfigurationProvider.getProvider(YamlConfiguration.class).save(config, new File(dataFolder, "config.yml"));
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
#SuppressWarnings({ "unused", "deprecation" })
public static String getUUID(String playerName) {
UUIDFetcher fetcher = new UUIDFetcher(Arrays.asList("evilmidget38", "mbaxter"));
String playerUUID = null;
try {
playerUUID = UUIDFetcher.getUUIDOf(playerName).toString();
} catch (Exception e2) {
playerUUID = BungeeCord.getInstance().getPlayer(playerName).getUniqueId().toString();
}
return playerUUID;
}
}
My procedure:
Create the project, import BungeeCord.jar, HikariCP-2.6.0.jar and slf4j-api-1.7.21.jar in buildpath, import HikariCP-2.6.0.jar and slf4j-api-1.7.21.jar
It worked in other projects, but magically, it's broken.
I don't want to use Maven, just because it must have a fix, because as I said, I used this same procedure so many times in the past.
Thank you for taking the time to read this :)
EDIT:
Image of the project
It's all in the exception:
Caused by: java.lang.ClassNotFoundException: com.zaxxer.hikari.HikariDataSource
The HikariDataSource is missing at runtime, you need to provide it somehow, for example by copying the relevant .jar with 'drivers' into your server libraries folder.
Also see some related questions:
How to set up datasource with Spring for HikariCP? and
How do I configure HikariCP in my Spring Boot app in my application.properties files?
From the exception it is clear that HikariCP-2.6.0.jar was in classpath during compile time but is missing in runtime and from the image of the project structure, it is also clear that both HikariCP-2.6.0.jar and slf4j-api-1.7.21.jar are missing as library reference in the ide. You need to keep these jar in your classpath library during compile time and runtime.
I would liked to run a .sql file into postgresql using java. I've been able to do it in phpmyadmin but i guess it's not the same for postgresql. I didn't find anything that can help me out on the internet. Can someone please advice?
My .sql file CONTAINS :
Create Database IF NOT EXISTS Student;
This is what i've done in phpmyadmin and it did worked. So that's what am trying to do but this time using postgresql.
Here is my code for phpmyadmin: I've used IBATIS
import java.io.BufferedReader;
import java.io.FileReader;
import java.sql.DriverManager;
import org.apache.ibatis.jdbc.ScriptRunner;
public class Main {
public static void main(String[] args) {
String script = "Entity.sql";
try {
Class.forName("com.mysql.jdbc.Driver");
new ScriptRunner(DriverManager.getConnection(
"jdbc:mysql://localhost:3306/mysql", "root", ""))
.runScript(new BufferedReader(new FileReader(script)));
} catch (Exception e) {
System.err.println(e);
}
}
}
Can you please help?
hello i am trying to load my jdbc diver through classloader
here i am code but why i get this error if possible than give me some example
i don not what to set class path variable
i am making a database application and this application need to connect database again and again and i want to give this application to my friend but my friend not know about class path he is like normal user ,
my application can connect 4 type of database MS-Access,MySQL,Oracle,SQLlite...
in user system i have to set 5 class path variable and provide 5 jar file
if i give this application 100 people than they have set set class path variable
i can include jar file with my application but how can i set class path dynamically ....
please provide some example...
package classload;
import java.io.File;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLClassLoader;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
public class ClassLoad {
static Connection con;
public static void main(String[] args) {
File jar = new File("C:\\query\\Driver.jar").getAbsoluteFile();
if(jar.exists()){
System.out.print("File exits");
}
URL urls[] = null;
try {
urls = new URL[] {
jar.toURI().toURL()
};
} catch (MalformedURLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
ClassLoader cl = new URLClassLoader(urls);
try {
Class.forName("com.mysql.jdbc.Driver", true, cl);
con=DriverManager.getConnection("jdbc:mysql://localhost", "root", "anil");
Statement stm=con.createStatement();
ResultSet result=stm.executeQuery("select *from actor");
while(result.next()){
System.out.print(result.getInt(1)+" "+result.getString(2)+" "+result.getString(3));
System.out.println("");
}
} catch (SQLException e) {
System.out.println(e);
}catch(ClassNotFoundException e){
System.out.println(e);
}
}
}
exception is
java.sql.SQLException: No suitable driver found for jdbc:mysql://localhost
Just use One-Jar to package the application and all of the dependencies into single fat jar. Your solution is no good. Your friend would have to use the same folder structure as you are in order for it to work.
This error is coming probably because the required jar file mysql-connector has not been included in your project. Try including jar file as shown here. And try this code to load Driver class:
Class.forName("com.mysql.jdbc.Driver");
con=DriverManager.getConnection("jdbc:mysql://localhost:3306/jlcstudents","root","password");
I am trying to get a CSV from the report using this well-known plugin and the example from its documentation, but it throws an exception. I wonder why, because I just copied most of the code from the doc.
My code is:
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.util.logging.Level;
import org.eclipse.birt.core.exception.BirtException;
import org.eclipse.birt.core.framework.Platform;
import org.eclipse.birt.report.engine.api.EngineConfig;
import org.eclipse.birt.report.engine.emitter.csv.CSVRenderOption;
import org.eclipse.birt.report.engine.api.IReportEngine;
import org.eclipse.birt.report.engine.api.IReportEngineFactory;
import org.eclipse.birt.report.engine.api.IReportRunnable;
import org.eclipse.birt.report.engine.api.IRunAndRenderTask;
public class RunReport {
static void runReport() throws FileNotFoundException, BirtException {
String resourcePath = "C:\\Users\\hpsa\\workspace\\My Reports\\";
FileInputStream fs = new FileInputStream(resourcePath + "new_report_1.rptdesign");
IReportEngine engine = null;
EngineConfig config = new EngineConfig();
config.setEngineHome("C:\\birtre\\birt-runtime-4_3_2\\");
config.setLogConfig("C:\\birtre\\", Level.FINE);
config.setResourcePath(resourcePath);
Platform.startup(config);
IReportEngineFactory factory = (IReportEngineFactory) Platform.createFactoryObject(IReportEngineFactory.EXTENSION_REPORT_ENGINE_FACTORY);
engine = factory.createReportEngine(config);
engine.changeLogLevel(Level.FINE);
IReportRunnable design = engine.openReportDesign(fs);
IRunAndRenderTask task = engine.createRunAndRenderTask(design);
CSVRenderOption csvOption = new CSVRenderOption();
String format = CSVRenderOption.OUTPUT_FORMAT_CSV;
csvOption.setOutputFormat(format);
csvOption.setOutputFileName("newBIRTcsv.csv");
csvOption.setShowDatatypeInSecondRow(true);
csvOption.setExportTableByName("SecondTable");
csvOption.setDelimiter("\t");
csvOption.setReplaceDelimiterInsideTextWith("-");
task.setRenderOption(csvOption);
task.setEmitterID("org.eclipse.birt.report.engine.emitter.csv");
task.run();
task.close();
Platform.shutdown();
System.out.println("Report Generated Sucessfully!!");
}
public static void main(String[] args) {
try {
runReport();
} catch (Exception e) {
e.printStackTrace();
}
}
}
I am getting the exception:
Exception in thread "main" java.lang.NoClassDefFoundError: org/eclipse/core/runtime/CoreException
at org.eclipse.birt.core.framework.Platform.createPlatformLauncher(Platform.java:115)
at org.eclipse.birt.core.framework.Platform.startup(Platform.java:74)
at com.demshin.birttest.RunReport.runReport(RunReport.java:26)
at com.demshin.birttest.RunReport.main(RunReport.java:55)
Caused by: java.lang.ClassNotFoundException: org.eclipse.core.runtime.CoreException
at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
... 4 more
I found the package org.eclipse.core.runtime and registered in the build path, but then I am getting the same exception. Indeed, there are no any CoreException.class in the org.eclipse.core.runtime package. What am I doing wrong?
Setting the engine home is deprecated and most of the time it will prevent the Platform to start, such in your case. Remove this line:
config.setEngineHome("C:\\birtre\\birt-runtime-4_3_2\\");
You just have to ensure the birt runtime 4.3.2 is in the classpath of your context. Furthermore i would recommend you try to generate a native format such pdf first, and then try with a csv format.
I was trying a lot of variants of importing different jars, but finally i found the weird decision here:
go to the Project Explorer, right-mouse click on properties for the
project, go to Java Build path, Click on the External Jars button,
then select all the libraries under
C:\birt_runtime\birt-runtime-2_1_0\ReportEngine\lib\ folder
This made chaos there, but at least it starts.