使用JDBC连接DM8数据库

使用IDEA开发工具连接DM8数据库

一、JDBC连接DM8

IDEA导入jar包

导入驱动

DM8的JDBC驱动可以在windows版达梦8数据库的安装目录下找到，具体如下

编写JDBC程序

创建java_jdbc包，然后创建一个名为JDBC_CONN的类
连接本地windows的DM8数据库
代码如下

package java_jdbc;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
public class JDBC_CONN {
    static Connection con = null;
    static String cname = "dm.jdbc.driver.DmDriver";
    static String url = "jdbc:dm://localhost:5236";
    static String userid = "SYSDBA";
    static String pwd = "SYSDBA";
    public static void main(String[] args) {
        try {
            Class.forName(cname);
            con = DriverManager.getConnection(url, userid, pwd);
            con.setAutoCommit(true);
            System.out.println("[SUCCESS]conn database");
        } catch (Exception e) {
            System.out.println("[FAIL]conn database：" + e.getMessage());
        }
    }
    public void disConn(Connection con) throws SQLException {
        if (con != null) {
            con.close();
        }
    }
}

运行一下

连接成功！

基础增删改查示例代码

我在SYSDBA模式下创建了一个TABLE_TEST表，里面数据类型和数据如下

编写简单的增删改查代码

package java_jdbc;

import java.sql.*;

public class TestInsert {
    static Connection con = null;
    static String cname = "dm.jdbc.driver.DmDriver";
    static String url = "jdbc:dm://localhost:5236";
    static String userid = "SYSDBA";
    static String pwd = "SYSDBA";
    static Statement state = null;
    static ResultSet rs = null;

    public static void main(String[] args) throws ClassNotFoundException, SQLException {
        try {
            //连接JDBC驱动程序
            System.out.println("Loading JDBC Driver...");
            Class.forName(cname);
            System.out.println("加载成功");
            //连接DM数据库
            System.out.println("Connecting to DM Server..");
            con = DriverManager.getConnection(url,userid,pwd);
            //通过连接对象创建java.sql.Statement对象
            state = con.createStatement();
            System.out.println("连接成功");

            System.out.println("-----------------------");

            //定义插入SQL语句
           String sql_insert1 = "insert into SYSDBA.TABLE_TEST(name,age)values('带土',10)";
           state.execute(sql_insert1);
           System.out.println("插入成功");

            //定义删除SQL语句
            String sql_del = "delete  from SYSDBA.TABLE_TEST where age = 12";
            boolean b = state.execute(sql_del);
            System.out.println("删除成功");

            //修改
            String sql_update = "update SYSDBA.TABLE_TEST set"+" name = '神秘面具男' where name = '带土';";
            state.executeUpdate(sql_update);
            System.out.println("更新成功");

            //定义查询 SQL
            String sql_selectAll = "select * from SYSDBA.TABLE_TEST";
            //执行查询的 SQL 语句
            rs = state.executeQuery(sql_selectAll);


        }catch (ClassNotFoundException e){
            e.printStackTrace();

        }catch (SQLException e){
            e.printStackTrace();
        }finally {
            try {
                rs.close();
                state.close();
                con.close();
            }catch (SQLException e){
                e.printStackTrace();
            }
        }

    }
}

运行结果如下

总结

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