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利用jdbc连接 对数据库的基本操作

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2016-06-07 15:41:301208browse

2, try { Class.forName(driverName); dbConn = DriverManager.getConnection(dbURL, userName, userPwd); Statement st=dbConn.createStatement(); //建立SQL语句对象 String sg=select * from Student; //查询学生表 ResultSet rs=st.executeQuery(sg); /

2,

 try {
   Class.forName(driverName);
   dbConn = DriverManager.getConnection(dbURL, userName, userPwd);
  
   Statement st=dbConn.createStatement();       //建立SQL语句对象
   String sg="select * from Student";                     //查询学生表
   ResultSet rs=st.executeQuery(sg);                      //执行SQL命令,返回的是ResultSet 结果集
   while(rs.next())                                       //移动指针到下一条记录
   {                                                                                                        
  System.out.println(rs.getString("id")+"\t"+rs.getString("name")+"\t"+rs.getString("phone")); //输出查询记录的格式
   }
   st.close();
  dbConn.close();
   System.out.println("Connection Successful!132");  //如果连接成功 控制台输出Connection Successful!
   
  } catch (Exception e) {
   e.printStackTrace();
  }

2,(1)执行SQL语句时,处理查询或添加记录 用executeQuery(String);

(2)处理修改记录或 删除记录用 executeUpdate(String);


3.最后关闭的时候,先关闭Statement类对象,然后关闭连接

st.close();

dbConn.close();


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