为什么我在JDBC连接中得到ArrayIndexOutOfBoundsException?

时间:2010-08-27 10:12:53

标签: java jdbc unidata universe

我是Java的新手,我正在尝试使用JDBC连接到UniVerse数据库。我正在使用Sun Java 6 JDK来使用NetBeans来构建项目。我在下面构建的简单测试会产生以下错误:

> run:
driver loaded
Exception in thread "main" java.lang.ExceptionInInitializerError
Connecting...
        at com.ibm.u2.jdbc.UniJDBCProtocolU2Impl.initDefaultMarks(UniJDBCProtocolU2Impl.java:1239)
        at com.ibm.u2.jdbc.UniJDBCProtocolU2Impl.<init>(UniJDBCProtocolU2Impl.java:116)
        at com.ibm.u2.jdbc.UniJDBCConnectionImpl.<init>(UniJDBCConnectionImpl.java:137)
        at com.ibm.u2.jdbc.UniJDBCDriver.connect(UniJDBCDriver.java:111)
        at java.sql.DriverManager.getConnection(DriverManager.java:582)
        at java.sql.DriverManager.getConnection(DriverManager.java:207)
        at testjdbc.Main.main(Main.java:36)
Caused by: java.lang.ArrayIndexOutOfBoundsException: 3
        at asjava.uniclientlibs.UniTokens.<clinit>(UniTokens.java:109)
        ... 7 more
Java Result: 1
BUILD SUCCESSFUL (total time: 0 seconds)

我的测试代码:

/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/

package testjdbc;
import java.sql.*;
import java.io.*;

 /**
 *
* @author norm
 */
public class Main {

/**
 * @param args the command line arguments
 */
public static void main(String[] args) {

    Connection con = null ;

    try{
        // generate URL

    String url = "jdbc:ibm-u2://my.uv.db:31438/DB-ACCOUNT;user=me;password=pass"; //testing, I remove user and password from here and use them below. Still FAILS!!! ARGGGG!!!
    String user = "me";
    String password = "pass";

    String driver = "com.ibm.u2.jdbc.UniJDBCDriver";
    //Load driver and connect to server
    Class.forName(driver);
    System.out.println("driver loaded");
    System.out.println("Connecting...");
    con = DriverManager.getConnection(url); //This is line 36
    // con = DriverManager.getConnection(url, user, password); // gives the same error
    //con = DriverManager.getConnection("jdbc:ibm-u2://my.uv.db:31438/D:/PathTo/DB;" ); //and yet the same error for this as well
    System.out.println("Connection String sent");
    System.out.println("Querying...");
    testQuery( con ) ;

    }
    catch ( SQLException e ) {
        System.out.println("Ex-Message :" + e.getMessage());
        System.out.println("Ex-Code    :" + e.getErrorCode()) ;
        System.out.println("Ex-SQLState:" + e.getSQLState());
        System.out.println("Ex-Next    :" + e.getNextException());
        e.printStackTrace() ;
        System.gc();
  } catch ( Exception e) {
        System.out.println("Exception caught:"+e) ;
        e.printStackTrace() ;
  }
}

public static void testQuery(Connection con)
    throws SQLException
{
    Statement stmt = con.createStatement();
    String sql = "select FIRST.NAME from EMPCEL";
            //"select @ID, CITY, STATE, ZIP, PHONE from CUSTOMER";

    // Execute the SELECT statement
    ResultSet rs = stmt.executeQuery(sql);

    // Get result of first five records
    System.out.println("\tlist selected columns for the first five records:");
    int i = 1;
    while (rs.next() && i < 6)
    {
        System.out.println("\nRecord "+ i +" :");
        System.out.println("\tFirst Name : \t" + rs.getString(1));
//            System.out.println("\tCITY :\t" + rs.getString(2));
//            System.out.println("\tSTATE :\t" + rs.getString(3));
//            System.out.println("\tZIP : \t" + rs.getString(4));
//            System.out.println("\tPHONE :\t" + rs.getString(5));
        i++;
        System.out.println("Finished.");
    }

    rs.close();
    stmt.close() ;
    System.out.println("\n\t*--- QUERY test is done successful ---*\n");
}

}

3 个答案:

答案 0 :(得分:2)

这似乎与Netbeans有关。另见他们论坛上的this topic。它似乎适用于Eclipse(可能还有其他所有环境)。

这显然是UniVerse JDBC驱动程序中的一个错误。它显然是依赖于某些特定环境条件的静态初始化器,这在Netbeans中是不同的。如果它不是一个bug,它会引发一个更加自我解释的异常,而不是一个如此愚蠢的运行时异常。

我会向IBM / UniVerse报告此错误。

答案 1 :(得分:1)

如果显示的代码是实际导致异常的代码,那么我猜,它失败了,因为在您尝试获取连接时urlnull

但错误堆栈跟踪在第36行显示错误,即注释行。因此,如果我的猜测是错误的,请编辑您的问题并显示匹配的代码和错误消息,并标记引发异常的代码行。


你并不孤单:same problem

答案 2 :(得分:0)

我也遇到过这个问题。 UniTokens假设存在字节到字符的一对一转换,但并非所有平台都是如此。将参数传递给JVM可以避免此问题。试试-Dfile.encoding =“windows-1252”或-Dfile.encoding =“US-ASCII”