德比和月食。 ＆QUOT;找不到主＆QUOT;例外。如何德比添加到类路径的配置？ [英] Derby and eclipse. "Can't find main" exception. How to add Derby to configuration classpath?

问题描述

我试图按照本指南对日食安装德比

我的$ CLASSPATH：

<$p$p><$c$c>/opt/Apache/db-derby-10.10.1.1-bin/lib/derby.jar:/opt/Apache/db-derby-10.10.1.1-bin/lib/derbytools.jar

我也通过项目属性把它添加到Java构建路径。现在，每当我运行我的程序，它说：

 异常线程mainjava.lang.NoClassDefFoundError的：组织/阿帕奇/德比/ IMPL /工具/ SYSINFO /主
抛出java.lang.ClassNotFoundException：引起org.apache.derby.impl.tools.sysinfo.Main
 

任何解决方案？
我的code：
进口java.sql.Connection中;
进口java.sql.DriverManager中;
。进口的java.sql preparedStatement;
进口java.sql.ResultSet中;
进口值java.sql.SQLException;
进口java.sql.Statement中;

导入java.util.ArrayList的;
进口java.util.Properties;

 公共类样品2 {    公共静态无效的主要（字串[] args）{
        的System.out.println（POOP）;
        新的样品2（）去（参数）;
        的System.out.println（SimpleApp完成）;
    }
    无效围棋（字串[] args）{
        康涅狄格州的连接= NULL;
        ArrayList的语句=新的ArrayList（）;
        preparedStatement psInsert = NULL;
        preparedStatement psUpdate = NULL;
        声明S = NULL;
        ResultSet的RS = NULL;
        字符串DBNAME =Lab4DB;
        尝试{
            康恩=的DriverManager.getConnection（协议+数据库名）;
            的System.out.println（连接到和创建的数据库+ DBNAME）;
            conn.setAutoCommit（假）;
        }赶上（的SQLException E）{
            // TODO自动生成catch块
            e.printStackTrace（）;
        }    }
    私人字符串框架=嵌入;
    私人串驱动器=org.apache.derby.jdbc.EmbeddedDriver;
    私人字符串协议=的jdbc：德比：
}
 

解决方案

右键点击您的项目运行方式>运行对话框>则类路径选项卡中点击添加外部jar添加的derby.jar，derbynet.jar和derbyclient.jar中

这三个jar文件你可以从apatche DB下载的文件夹中找到它们

I'm trying to install derby on eclipse according to this guide

My $CLASSPATH :

/opt/Apache/db-derby-10.10.1.1-bin/lib/derby.jar:/opt/Apache/db-derby-10.10.1.1-bin/lib/derbytools.jar

I've also added it to Java build path via project properties. Now whenever i run my program, it says:

Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/derby/impl/tools/sysinfo/Main
Caused by: java.lang.ClassNotFoundException: org.apache.derby.impl.tools.sysinfo.Main

Any solutions? My code: import java.sql.Connection; import java.sql.DriverManager; import java.sql.PreparedStatement; import java.sql.ResultSet; import java.sql.SQLException; import java.sql.Statement;

import java.util.ArrayList; import java.util.Properties;

public class Sample2 {

    public static void main(String[] args) {
        System.out.println("POOP");
        new Sample2().go(args);
        System.out.println("SimpleApp finished");


    }
    void go(String[] args){
        Connection conn = null;
        ArrayList statements = new ArrayList(); 
        PreparedStatement psInsert = null;
        PreparedStatement psUpdate = null;
        Statement s = null;
        ResultSet rs = null;
        String dbName = "Lab4DB";
        try {
            conn = DriverManager.getConnection(protocol + dbName);
            System.out.println("Connected to and created database " + dbName);
            conn.setAutoCommit(false);
        } catch (SQLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

    }
    private String framework = "embedded";
    private String driver = "org.apache.derby.jdbc.EmbeddedDriver";
    private String protocol = "jdbc:derby:";
}

解决方案

right click on your project run as > run dialog > class path tab then add derby.jar , derbynet.jar and derbyclient.jar by clicking on add external jar

those three jar file you can find them in the folder downloaded from apatche DB

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