我是 Java 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。我在下面构建了简单的测试，但是它给出了以下错误：
> 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");
}
}