智能插入：将整批分批，每一千条提交一次，sql注入（安全，使用软解析，提高效率）
sql注入攻击：简单例子
select * from table where name=‘"+un+"‘ and psw=‘"+pw+"‘",
假如可以输入任何字符,un随便输入12345‘ or 1=1--这样提交过来的aa就会select * from table where name=‘12345‘ or 1=1--password
String sql = "insert into employee (name, city, phone) values (?, ?, ?)"; Connection connection = new getConnection(); PreparedStatement ps = connection.prepareStatement(sql); final int batchSize = 1000; int count = 0; for (Employee employee: employees) { ps.setString(1, employee.getName()); ps.setString(2, employee.getCity()); ps.setString(3, employee.getPhone()); ps.addBatch(); if(++count % batchSize == 0) { ps.executeBatch(); } } ps.executeBatch(); // insert remaining records ps.close(); connection.close();