从Java连接到Oracle ...异常 [英] Connecting to Oracle from Java ...Exception

问题描述

我想连接远程Oracle DB，但是出现异常.请帮帮我.我该怎么办?

I want to connect Remote Oracle DB but I have Exception. Help me please. What can I do?

我尝试了这个，但是不起作用:

I tried this but it doesn't work:

   try {
            Class.forName("oracle.jdbc.driver.OracleDriver");
            Connection con = DriverManager.getConnection(
                    "jdbc:oracle:thin:@*****:1521/******", "*********",
                    "********");
            Statement st = con.createStatement();
            con.close();
        } catch (SQLException e) {
            e.printStackTrace();
        } catch (ClassNotFoundException e) {
             e.printStackTrace();
        }

获取错误:

 Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: -1
        at oracle.sql.converter.CharacterSetMetaData$JdbcCharacterSetMetaData.isFixedWidth(CharacterSetMetaData.java:1292)
        at oracle.sql.converter.CharacterSetMetaData.getRatio(CharacterSetMetaData.java:1230)
        at oracle.jdbc.driver.DBConversion.init(DBConversion.java:159)
        at oracle.jdbc.driver.DBConversion.<init>(DBConversion.java:112)
        at oracle.jdbc.driver.T4CConnection.connect(T4CConnection.java:1075)
        at oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:301)
        at oracle.jdbc.driver.PhysicalConnection.<init>(PhysicalConnection.java:531)
        at oracle.jdbc.driver.T4CConnection.<init>(T4CConnection.java:221)
        at oracle.jdbc.driver.T4CDriverExtension.getConnection(T4CDriverExtension.java:32)
        at oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:503)
        at java.sql.DriverManager.getConnection(DriverManager.java:664)
        at java.sql.DriverManager.getConnection(DriverManager.java:247)

推荐答案

您的连接URL格式错误.您正在混合 SID 和 service 格式.

Your connect URL is wrong formatted. You are mixing the SID and service format.

任何一个

DriverManager.getConnection(
    "jdbc:oracle:thin:<user>/<password>@<host>:<port>:<sid>");

或

DriverManager.getConnection(
    "jdbc:oracle:thin:@<host>:<port>:<sid>", "<user>", "<password>");

或者如果您连接到服务而不是SID

or in case you connect to a service instead of a SID

DriverManager.getConnection(
    "jdbc:oracle:thin:<user>/<password>@//<host>:<port>/<service");

对于使用 Properties 对象的示例，请查看

For an example using a Properties object have a look into the javadoc of oracle.jdbc.OracleDriver

编辑在此处找到精简样式的服务名称语法

编辑2 启用驱动程序日志记录，以查看是否会有一些有用的消息.

edit 2 Enable driver logging to see if there would be some helpful message there.

OracleLog.setTrace(true);
DriverManager.setLogWriter(new PrintWriter(System.out));

编辑3 这是一种通过反射查找服务器和驱动程序报告哪个字符集的方法.

edit 3 Here a way to find via reflection which charset is reported by the server and driver.

出于许可的原因，软件包声明很重要.

For permission reason the package declaration is important.

package oracle.jdbc.driver;

import java.lang.reflect.Field;
import java.sql.Connection;
import java.sql.DriverManager;
import oracle.sql.CharacterSet;
import sun.reflect.ReflectionFactory;

public class OJdbcInfo {

    public static void main(String[] args) throws Exception {
        OracleLog.setTrace(true);
        DriverManager.setLogWriter(new PrintWriter(System.out));

        System.out.printf("defaultCharset: %s%n", Charset.defaultCharset());
        System.out.printf("file.encoding : %s%n", 
            System.getProperty("file.encoding"));

        String connectUrl = 
            "jdbc:oracle:thin:<user>/<password>@<host>:<port>:<sid>";

        try (Connection con = DriverManager.getConnection(connectUrl)) {
            T4CConnection t4Conn = (T4CConnection) con;
            T4C8TTIpro pro = t4Conn.pro;

            short oVersion = pro.oVersion;
            short svrCharSet = pro.svrCharSet;
            short driverCharSet;
            try {
                driverCharSet = DBConversion.findDriverCharSet(
                    svrCharSet, oVersion);
            } catch (ArrayIndexOutOfBoundsException e) {
                System.err.printf("failed to get driver charset: %s%n", 
                    e.getMessage());
                driverCharSet = -1;
            }

            System.out.println("server charset: " + svrCharSet);
            System.out.println("driver charset: " + driverCharSet);

            Object instance = ReflectionFactory.getReflectionFactory()
                    .newConstructorForSerialization(
                            Class.forName("oracle.sql.CharacterSetFactoryThin"),
                            Object.class.getConstructor())
                    .newInstance();

            for (Field fs : CharacterSet.class.getDeclaredFields()) {
                if (fs.getType() == short.class) {
                    if (fs.getShort(instance) == driverCharSet) {
                        System.out.printf("charset name  : %s%n", fs.getName());
                    }
                }
            }
        }
    }
}

编译

mkdir bin
javac -cp ojdbc6_g.jar -d bin/ OJdbcInfo.java

运行

java -cp ojdbc6_g.jar:bin/ oracle.jdbc.driver.OJdbcInfo

可能的输出

defaultCharset: UTF-8
file.encoding : UTF-8
server charset: 873
driver charset: 873
charset name  : AL32UTF8_CHARSET

在您的情况下，驱动程序字符集很可能是 -1 .

Most probably the driver charset is -1 in your case.

检查您是否正在使用最新的驱动程序版本.

Check that you are using an up-to-date driver version.

java -jar ojdbc6.jar

可能的输出

Oracle 11.2.0.4.0 JDBC 4.0 compiled with JDK6 on Thu_Jul_03_18:17:32_PDT_2014

检查Linux框上的 locale 设置

Check the locale setting on your Linux box

locale

可能的输出(取决于您的语言设置，但是所有值通常应该相同)

possible output (depends on your language setting, but all values should be normally the same)

LANG=en_US.UTF-8
LC_CTYPE="en_US.UTF-8"
LC_NUMERIC="en_US.UTF-8"
LC_TIME="en_US.UTF-8"
LC_COLLATE="en_US.UTF-8"
LC_MONETARY="en_US.UTF-8"
LC_MESSAGES="en_US.UTF-8"
LC_PAPER="en_US.UTF-8"
LC_NAME="en_US.UTF-8"
LC_ADDRESS="en_US.UTF-8"
LC_TELEPHONE="en_US.UTF-8"
LC_MEASUREMENT="en_US.UTF-8"
LC_IDENTIFICATION="en_US.UTF-8"

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