Question

我正在研究Junit测试文件，该文件加载SQL文件并将其加载到Oracle中：

import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.sql.Connection;
import java.sql.SQLException;
import java.sql.Statement;
import javax.naming.Context;
import javax.naming.InitialContext;
import javax.naming.NamingException;
import javax.sql.DataSource;
import oracle.jdbc.pool.OracleConnectionPoolDataSource;
import org.junit.BeforeClass;
import org.junit.Test;

public class OracleCreateScheme1
{

    public OracleCreateScheme1()
    {
    }

    @BeforeClass
    public static void setUpClass() throws Exception
    {
        // rcarver - setup the jndi context and the datasource
        try
        {
            // Create initial context
            System.setProperty(Context.INITIAL_CONTEXT_FACTORY,
                    "org.apache.naming.java.javaURLContextFactory");
            System.setProperty(Context.URL_PKG_PREFIXES,
                    "org.apache.naming");
            InitialContext ic = new InitialContext();

            ic.createSubcontext("java:");
            ic.createSubcontext("java:/comp");
            ic.createSubcontext("java:/comp/env");
            ic.createSubcontext("java:/comp/env/jdbc");

            // Construct DataSource
            OracleConnectionPoolDataSource ds = new OracleConnectionPoolDataSource();
            ds.setURL("jdbc:oracle:thin:@192.168.1.104:1521:oracle");
            ds.setUser("admin");
            ds.setPassword("qwerty");

            ic.bind("java:/comp/env/jdbc/oracle", ds);
        }
        catch (NamingException ex)
        {
            //Logger.getLogger(MyDAOTest.class.getName()).log(Level.SEVERE, null, ex);
        }

    }

    @Test
    public void createOracleScheme() throws SQLException, NamingException
    {

        Context initContext = new InitialContext();
        Context webContext = (Context) initContext.lookup("java:/comp/env");

        DataSource ds = (DataSource) webContext.lookup("jdbc/Oracle");

        // Read File ------------------------------------------------------------------

        String s = new String();
        StringBuffer sb = new StringBuffer();

        try
        {
            FileReader fr = new FileReader(new File("OracleScheme.sql"));

            BufferedReader br = new BufferedReader(fr);

            while ((s = br.readLine()) != null)
            {
                sb.append(s);
            }
            br.close();

            // here is our splitter ! We use ";" as a delimiter for each request
            // then we are sure to have well formed statements
            String[] inst = sb.toString().split(";");

            Connection c = ds.getConnection();
            Statement st = c.createStatement();

            for (int i = 0; i < inst.length; i++)
            {
                // we ensure that there is no spaces before or after the request string
                // in order to not execute empty statements
                if (!inst[i].trim().equals(""))
                {
                    st.executeUpdate(inst[i]);
                    System.out.println(">>" + inst[i]);
                }
            }

        }
        catch (Exception e)
        {
            System.out.println("*** Error : " + e.toString());
            System.out.println("*** ");
            System.out.println("*** Error : ");
            e.printStackTrace();
            System.out.println("################################################");
            System.out.println(sb.toString());
        }

    }
}

当我测试文件时，我遇到了这个问题：

Cannot instantiate class: org.apache.naming.java.javaURLContextFactory

你能告诉我如何解决这个问题吗？你也发现这个Java代码有什么问题吗？

Answer 1

我通过将Apache Tomcat中的库添加到运行时测试库来修复此问题。

在Netbeans中：

Project Properties -> Libraries -> Run Tests

Add JAR/Folder

我需要的两个库是catalina.jar和tomcat-juli.jar。你的里程可能会有所不同。

我在Tomcat的安装目录下找到它们。 e.g：

apache-tomcat-7.0.34/bin/tomcat-juli.jar
apache-tomcat-7.0.34/lib/catalina.jar

注意其中一个罐子在bin目录中，另一个在lib目录中

这可能不是解决问题的最佳方法。最好采用不同的方式来注入DataSource。

Answer 2

我收到此错误，因为具有此类的jar未添加到我的类路径中。例外是

Exception in thread "main" javax.naming.NoInitialContextException: Cannot instantiate
class: org.apache.naming.java.javaURLContextFactory [Root exception is java.lang.Class
NotFoundException: org.apache.naming.java.javaURLContextFactory]
        at javax.naming.spi.NamingManager.getInitialContext(NamingManager.java:657)
        at javax.naming.InitialContext.getDefaultInitCtx(InitialContext.java:288)
        at javax.naming.InitialContext.init(InitialContext.java:223)
        at javax.naming.InitialContext.<init>(InitialContext.java:175)
        at ContextLoaderTest.setDataSourceInformation(ContextLoaderTest.java:51)
        at ContextLoaderTest.main(ContextLoaderTest.java:34)
Caused by: java.lang.ClassNotFoundException: org.apache.naming.java.javaURLContextFact
ory

您需要添加catalina jar文件。为此，在Maven依赖项中添加以下内容 -

<dependency>
    <groupId>org.apache.tomcat</groupId>
    <artifactId>catalina</artifactId>
    <version>6.0.43</version>
</dependency>

注意工件名称现已更改。工件名称为tomcat-catalina而非'catalina'

<dependency>
    <groupId>org.apache.tomcat</groupId>
    <artifactId>tomcat-catalina</artifactId>
    <version>8.0.15</version>
</dependency>

。所以使用

中的最新版本

http://mvnrepository.com/artifact/org.apache.tomcat/tomcat-catalina

大于

http://mvnrepository.com/artifact/org.apache.tomcat/catalina

无法实例化类：org.apache.naming.java.javaURLContextFactory

2 个答案: