粗糙的区别prepareStatement:（为Statement的子类）与Statement

来源：互联网发布：淘宝物流跟踪怎么做的编辑：程序博客网时间：2024/06/05 06:58

区别：
prepareStatement:（为Statement的子类）

conn = DBFactory.getInstance().getImpl().getConnection();//方式一：（不推荐）//pstmt = conn.prepareStatement(" update "+tb+"  set WDNR=? where "+bh+"=?");//方式二：pstmt.setBinaryStream(1, doc.getWDNR(), (int) doc.getStreamSize());pstmt.setString(2, doc.getWDMC());returnVal = pstmt.executeUpdate();

______________________________________

Statement:

Connection conn = null;Statement stmt = null;ResultSet rs = null;//用于加载Driver类(jdbc驱动器)//registerDriver注册java.sql.DriverManager.registerDriverClass.forName("org.mariadb.jdbc.Driver").newInstance(); String url = "jdbc:mariadb://192.168.1.100:3306/test?user=root&password=pdcss";conn = DriverManager.getConnection(url);stmt = conn.createStatement();rs = stmt.executeQuery(sql);

阅读全文

0 0