两个java.sql.Date之间的Select语句 [英] Select statement between two java.sql.Date

问题描述

我的代码是：

    java.sql.Date fromDate= new java.sql.Date(date1);
    java.sql.Date toDate= new java.sql.Date(date2);

    String select = "SELECT * FROM Table WHERE Date between " + fromDate+ " and" + toDate;

我在使用Derby数据库，我必须运行此查询，但返回错误。我能怎么做？谢谢。

I´m using Derby database, and I have to run this query but return error. How can I do? Thanks.

推荐答案

首先，停止构建这样的SQL 。它容易受到 SQL注入攻击，转换问题（这可能是这里的问题）并且很难阅读。

First, stop building SQL like that. It's vulnerable to SQL injection attacks, conversion issues (which is probably the problem here) and it's hard to read.

改用参数化SQL：

// TODO: Close the statement, e.g. using a try-with-resources statement
// or a finally block.
PreparedStatement statement =
    conn.prepareStatement("SELECT * FROM Table WHERE Date between ? and ?");
statement.setDate(1, fromDate);
statement.setDate(2, toDate);
ResultSet results = statement.executeQuery();
// Use the results

这可能足以立即解决问题。如果不是，请提供更多详细信息。

This may well be enough to fix the problems immediately. If it's not, please give more details.

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