Question

以下是连接数据库时的连接字符串：

public static void createConnection() throws Exception {
    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:brdqa", "STATICDATA_APP",
                        "password");

            } catch (SQLException e) {

                System.out.println("Connection Failed! Check output console");
                e.printStackTrace();
                return;

            }

运行此代码时，我得到以下异常：

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(Unknown Source)
    at java.sql.DriverManager.getConnection(Unknown Source)
    at com.markit.scripts.ConnectMRD.createConnection(ConnectMRD.java:32)
    at com.markit.scripts.ConnectMRD.main(ConnectMRD.java:54)

我谷歌很多，发现只有这个连接字符串存在问题。字符串“brdqa”是我的数据库名称，“STATICDATA_APP”是我的用户名。我可以手动访问数据库。请建议。

Answer 1

此错误表示驱动程序无法将套接字连接到主机＆＃34; localhost＆＃34;在1521港口。

您可以仔细检查相同的连接字符串是否适用于sqlplus：

sqlplus "STATICDATA_APP/password@(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=localhost)(PORT=1521))(CONNECT_DATA=(SID=brdqa)))"

听众不支持＆＃34; localhost＆＃34;作为主机名。您是否尝试使用本地IP地址＆＃34; 127.0.0.1＆＃34;？

"jdbc:oracle:thin:@127.0.0.1:1521:brdqa"

网络适配器无法建立连接

1 个答案:

网络适​​配器无法建立连接

1 个答案:

网络适配器无法建立连接