1.今日收获内容
在web链接数据库
package DBUtil; import java.sql.*; public class DBUtil { public static String db_url = "jdbc:mysql://localhost:3306/text111?serverTimezone=GMT%2B8&useSSL=false"; public static String db_user = "root"; public static String db_pass = "zgq727"; public static Connection getConn () { Connection conn = null; try { Class.forName("com.mysql.jdbc.Driver"); conn = DriverManager.getConnection(db_url, db_user,db_pass); } catch (Exception e) { e.printStackTrace(); } return conn; }//end getConn public static void close (Statement state, Connection conn) { if (state != null) { try { state.close(); } catch (SQLException e) { e.printStackTrace(); } } if (conn != null) { try { conn.close(); } catch (SQLException e) { e.printStackTrace(); } } } public static void close (ResultSet rs, Statement state, Connection conn) { if (rs != null) { try { rs.close(); } catch (SQLException e) { e.printStackTrace(); } } if (state != null) { try { state.close(); } catch (SQLException e) { e.printStackTrace(); } } if (conn != null) { try { conn.close(); } catch (SQLException e) { e.printStackTrace(); } } } public static void main(String[] args) throws SQLException { Connection conn = getConn(); PreparedStatement pstmt = null; ResultSet rs = null; String sql ="select * from text2"; pstmt = conn.prepareStatement(sql); rs = pstmt.executeQuery(); if(rs.next()){ System.out.println("连接成功"); }else{ System.out.println("连接失败"); } } }
连接到数据库
2.遇到的问题
链接无误
3.明天目标
Javasql