MySQL转HTTP接口(27)-支持文档
```java
public void delStudent(){
//获取连接
Connection conn = DbUtil.getConnection();
//sql, 每行加空格
String sql = "delete from student where id=?";
//预编译SQL，减少sql执行
PreparedStatement ptmt = conn.prepareStatement(sql);
//传参
ptmt.setInt(1, id);
//执行
ptmt.execute();
DbUtil.close(ptmt,conn);
}
```