1. 安装jdbc驱动
vi ~/.bashrc
添加如下内容:
export CLASSPATH=$CLASSPATH:$JAVA_HOME/lib:
$JAVA_HOME/jre/lib:/home/xiaochu.yh/tools/mysql-connector-java-5.1.6/mysql-connector-java
-5.1.6-bin.jar
OceanBase使用JDBC 5.1.6版本。
2. 使用jdbc驱动
vi MySQLConnection.java ,输入下面的代码;然后javac MySQLConnection.java 编译;最后java MySQLConnection运行即可
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
public class MySQLConnection {
public static void main(String[] args) {
Connection conn = null;
Statement stmt = null;
ResultSet rs = null;
String url = null;
String user = null;
String password = null;
String sql = null;
try {
Class.forName("com.mysql.jdbc.Driver"); //加载mysq驱动
} catch (ClassNotFoundException e) {
System.out.println("驱动加载错误");
e.printStackTrace();//打印出错详细信息
}
try {
url = "jdbc:mysql://10.10.10.7:4797/test?user=admin&password=admin&useUnicode=true&&characterEncoding=gb2312&autoReconnect = true";
user = "admin";
password = "admin";
conn = DriverManager.getConnection(url,user,password);
} catch (SQLException e) {
System.out.println("数据库连接错误");
e.printStackTrace();
}
try {
stmt = conn.createStatement();
sql = "select * from dept"; //dept这张表有deptno,deptname和age这三个字段
rs = stmt.executeQuery(sql);//执行sql语句
while(rs.next()) {
System.out.print(rs.getInt("deptno") + " ");
System.out.print(rs.getString("deptname") + " ");
System.out.println(rs.getInt("age") + " ");
}
} catch (SQLException e) {
System.out.println("数据操作错误");
e.printStackTrace();
}
//关闭数据库
try {
if(rs != null) {
rs.close();
rs = null;
}
if(stmt != null) {
stmt.close();
stmt = null;
}
if(conn != null) {
conn.close();
conn = null;
}
} catch(Exception e) {
System.out.println("数据库关闭错误");
e.printStackTrace();
}
}
}