Question

我想通过api显示订单列表，但是DAO SQLSyntaxErrorException中出现错误。

@RequestMapping("list")
    public String getAllOrders() {
        //APIResponse response=new APIResponse();
        List<OrderBeans> orderList = orderDao.selectAll();

        return new Gson().toJson(orderList);
    }

public List<OrderBeans> selectAll() {
        System.out.println("DAO => " + jdbcTemplate);
        List<OrderBeans> orders = null;
        String query = "select * from " + TABLE_ORDER +"";
        try {
            orders = jdbcTemplate.query(query, new OrderRowMapper());
        } catch (EmptyResultDataAccessException | IncorrectResultSetColumnCountException e) {

        }
        return orders;
    }

3-May-2019 15:01:15.997 SEVERE [http-nio-8084-exec-109] org.apache.catalina.core.StandardWrapperValve.invoke Servlet.service() for servlet [dispatcher] in context with path [/Grocery] threw exception [Request processing failed; nested exception is org.springframework.jdbc.BadSqlGrammarException: StatementCallback; bad SQL grammar [select * from order]; nested exception is java.sql.SQLSyntaxErrorException: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'order' at line 1] with root cause
 java.sql.SQLSyntaxErrorException: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'order' at line 1

Answer 1

我在这里推测您的错误是由于您的SQL表被称为ORDER，这当然是几乎所有SQL版本中的保留关键字。您应该始终避免使用保留关键字来命名表和列。解决方法是，您可以按以下方式构建查询，在表名的周围加上反引号：

String query = "select * from `" + TABLE_ORDER + "`";

但是，只有在您有机会修复数据模型之前，以上内容才应视为临时解决方案。

我们如何解决“ java.sql.SQLSyntaxErrorException：

1 个答案: