Java 无法连接到Oracle 10g XE
我的代码:Java 无法连接到Oracle 10g XE,java,oracle,jdbc,database-connection,sqlexception,Java,Oracle,Jdbc,Database Connection,Sqlexception,我的代码: package java_connect; import java.sql.*; public class JdbcOracleXe { public static void main(String[] args) { System.out.println("-------- Oracle JDBC Connection Testing ------"); try { Class.forName("oracle.
package java_connect;
import java.sql.*;
public class JdbcOracleXe {
public static void main(String[] args) {
System.out.println("-------- Oracle JDBC Connection Testing ------");
try {
Class.forName("oracle.jdbc.driver.OracleDriver");
} catch (ClassNotFoundException e) {
System.out.println("Where is your Oracle JDBC Driver?");
e.printStackTrace();
return;
}
System.out.println("Oracle JDBC Driver Registered!");
Connection connection = null;
try {
connection = DriverManager.getConnection(
"jdbc:oracle:thin:@localhost:1521/xe", "username",
"password");
} catch (SQLException e) {
System.out.println("Connection Failed! Check output console");
e.printStackTrace();
return;
}
if (connection != null) {
System.out.println("You made it, take control your database now!");
} else {
System.out.println("Failed to make connection!");
}
}
}
错误消息:
-------- Oracle JDBC Connection Testing ------
Oracle JDBC Driver Registered!
Connection Failed! Check output console
java.sql.SQLException: Io exception: The Network Adapter could not establish the connection
at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:112)
at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:146)
at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:255)
at oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:387)
at oracle.jdbc.driver.PhysicalConnection.<init>(PhysicalConnection.java:414)
at oracle.jdbc.driver.T4CConnection.<init>(T4CConnection.java:165)
at oracle.jdbc.driver.T4CDriverExtension.getConnection(T4CDriverExtension.java:35)
at oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:801)
at java.sql.DriverManager.getConnection(DriverManager.java:664)
at java.sql.DriverManager.getConnection(DriverManager.java:247)
at java_connect.JdbcOracleXe.main(JdbcOracleXe.java:28)
-----Oracle JDBC连接测试------
Oracle JDBC驱动程序已注册!
连接失败!检查输出控制台
java.sql.SQLException:Io异常:网络适配器无法建立连接
位于oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:112)
位于oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:146)
位于oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:255)
位于oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:387)
位于oracle.jdbc.driver.PhysicalConnection.(PhysicalConnection.java:414)
位于oracle.jdbc.driver.T4CConnection(T4CConnection.java:165)
位于oracle.jdbc.driver.T4CDriverExtension.getConnection(T4CDriverExtension.java:35)
位于oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:801)
位于java.sql.DriverManager.getConnection(DriverManager.java:664)
位于java.sql.DriverManager.getConnection(DriverManager.java:247)
位于java_connect.JdbcOracleXe.main(JdbcOracleXe.java:28)
检查数据库是否已启动。似乎数据库可能已关闭,因此您无法连接那么,您自己的计算机上是否有Oracle数据库在端口1521上运行和侦听?似乎不是。请添加堆栈跟踪的其余部分,理想情况下,我们可以确认连接是否在主机localhost上查找端口1521。