jdbc之statement 与 preparedment

1、statement

 @org.junit.Test
    public void teststatement() throws Exception {
        long start = System.currentTimeMillis();
        //创建连接
        String driverClass = "com.mysql.jdbc.Driver";
        String url = "jdbc:mysql://localhost:3306/mysql_jdbc";
        String username = "root";
        String password = "root";
        Class.forName(driverClass);
        Connection con = DriverManager.getConnection(url, username, password);
        //关闭自动提交
        con.setAutoCommit(false);

        //创建语句
        Statement st = con.createStatement();
        for(int i = 1; i < 10000 ; i++){
            String sql = "insert into student values( " + i + " , " + "'tom "+ i  + "', " + (i % 100) + ")";
            st.execute(sql);
        }
        //提交
        con.commit();

        st.close();
        con.close();
        long time = System.currentTimeMillis() - start;
        System.out.println(time);//885
    }

2、prepared statement

 @org.junit.Test
    public void testpreparedstatement() throws Exception {
        long start = System.currentTimeMillis();
        //创建连接
        String driverClass = "com.mysql.jdbc.Driver";
        String url = "jdbc:mysql://localhost:3306/mysql_jdbc";
        String username = "root";
        String password = "root";
        Class.forName(driverClass);
        Connection con = DriverManager.getConnection(url, username, password);
        //关闭自动提交
        con.setAutoCommit(false);

        //创建预处理语句
        String sql = "insert into student values( ?,?,?)";
        PreparedStatement ps = con.prepareStatement(sql);

        for(int i = 1; i < 10000 ; i++){
            ps.setInt(1,i);
            ps.setString(2,"tom" + i);
            ps.setInt(3,i % 100);
            //注意这里执行的是更新操作
            ps.executeUpdate();
        }
        //提交
        con.commit();

        ps.close();
        con.close();
        long time = System.currentTimeMillis() - start;
        System.out.println(time);//928
    }

3、prepared statement 批处理

 @org.junit.Test
    public void testpreparedstatement() throws Exception {
        long start = System.currentTimeMillis();
        //创建连接
        String driverClass = "com.mysql.jdbc.Driver";
        String url = "jdbc:mysql://localhost:3306/mysql_jdbc";
        String username = "root";
        String password = "root";
        Class.forName(driverClass);
        Connection con = DriverManager.getConnection(url, username, password);
        //关闭自动提交
        con.setAutoCommit(false);

        //创建预处理语句
        String sql = "insert into student values( ?,?,?)";
        PreparedStatement ps = con.prepareStatement(sql);

        for(int i = 1; i < 100000 ; i++){
            ps.setInt(1,i);
            ps.setString(2,"tom" + i);
            ps.setInt(3,i % 100);
            ps.addBatch();//放在set的后面
            if(i % 200 == 0 ){
                ps.executeBatch();
            }
        }
        ps.executeBatch();
        //提交
        con.commit();

        ps.close();
        con.close();
        long time = System.currentTimeMillis() - start;
        System.out.println(time);//5351
    }