Java连接oracle数据库-------jdbc的thin方式

此方法在使用时需要将oracle的jar包加到classpath变量中，此包可以在oralce客户端程序的$ORACLE_HOME/jdbc/lib/classes12.jar找到。

import java.sql.*;

public class jdbcthin {
//dbUrl数据库连接串信息，其中“1521”为端口，“ora9”为sid
String dbUrl = "jdbc:oracle:thin:@10.10.20.15:1521:ora9";
//theUser为数据库用户名
String theUser = "sman";
//thePw为数据库密码
String thePw = "sman";
//几个数据库变量
Connection c = null;
Statement conn;
ResultSet rs = null;

//初始化连接
public jdbcthin() {
try {
Class.forName("oracle.jdbc.driver.OracleDriver").newInstance();
//与url指定的数据源建立连接
c = DriverManager.getConnection(dbUrl, theUser, thePw);
//采用Statement进行查询
conn = c.createStatement();
} catch (Exception e) {
e.printStackTrace();
}
}

//执行查询
public ResultSet executeQuery(String sql) {
rs = null;
try {
rs = conn.executeQuery(sql);
} catch (SQLException e) {
e.printStackTrace();
}
return rs;
}

public void close() {
try {
conn.close();
c.close();
} catch (Exception e) {
e.printStackTrace();
}
}

public static void main(String[] args) {
ResultSet newrs;
jdbcthin newjdbc = new jdbcthin();
newrs = newjdbc.executeQuery("select * from eventtype");
try {
while (newrs.next()) {
System.out.print(newrs.getString("event_type"));
System.out.println(":"+newrs.getString("content"));
}
} catch (Exception e) {
e.printStackTrace();
}

newjdbc.close();
}
}