Question

我写了一个简单的代码来连接到DB

static final String JDBC_DRIVER = "com.oracle.jdbc.OracleDriver";  
static final String DB_URL ="jdbc:oracle:thin:@unix_server_name:1521:ab";

//  Database credentials
static final String USER = "xyz";
static final String PASS = "xyz";

public static void main(String[] args) {
Connection conn = null;
Statement stmt = null;
try{
    //STEP 2: Register JDBC driver
    Class.forName("oracle.jdbc.driver.OracleDriver");

    //STEP 3: Open a connection
    System.out.println("Connecting to database...");
    conn = DriverManager.getConnection(DB_URL,USER,PASS);
    System.out.println("Connection successful");

每当我运行此代码时，我都会收到错误：

连接数据库... java.sql.SQLRecoverableException：IO错误：网络适配器无法建立连接 oracle.jdbc.driver.T4CConnection.logon（T4CConnection.java:419）at at oracle.jdbc.driver.PhysicalConnection。（PhysicalConnection.java:536）在oracle.jdbc.driver.T4CConnection。（T4CConnection.java:228）at oracle.jdbc.driver.T4CDriverExtension.getConnection（T4CDriverExtension.java:32）在oracle.jdbc.driver.OracleDriver.connect（OracleDriver.java:521）at java.sql.DriverManager.getConnection（未知来源）at java.sql.DriverManager.getConnection（未知来源）at PLSQL_JDBC.query_jdbc.main（query_jdbc.java:26）引起： oracle.net.ns.NetException：网络适配器无法建立连接

请帮帮我.. 谢谢

我无法通过JDBC中的unix服务器连接到Oracle DB

0 个答案: