te')); return $arr; } /* 遍历用户所有主题 * @param $uid 用户ID * @param int $page 页数 * @param int $pagesize 每页记录条数 * @param bool $desc 排序方式 TRUE降序 FALSE升序 * @param string $key 返回的数组用那一列的值作为 key * @param array $col 查询哪些列 */ function thread_tid_find_by_uid($uid, $page = 1, $pagesize = 1000, $desc = TRUE, $key = 'tid', $col = array()) { if (empty($uid)) return array(); $orderby = TRUE == $desc ? -1 : 1; $arr = thread_tid__find($cond = array('uid' => $uid), array('tid' => $orderby), $page, $pagesize, $key, $col); return $arr; } // 遍历栏目下tid 支持数组 $fid = array(1,2,3) function thread_tid_find_by_fid($fid, $page = 1, $pagesize = 1000, $desc = TRUE) { if (empty($fid)) return array(); $orderby = TRUE == $desc ? -1 : 1; $arr = thread_tid__find($cond = array('fid' => $fid), array('tid' => $orderby), $page, $pagesize, 'tid', array('tid', 'verify_date')); return $arr; } function thread_tid_delete($tid) { if (empty($tid)) return FALSE; $r = thread_tid__delete(array('tid' => $tid)); return $r; } function thread_tid_count() { $n = thread_tid__count(); return $n; } // 统计用户主题数 大数量下严谨使用非主键统计 function thread_uid_count($uid) { $n = thread_tid__count(array('uid' => $uid)); return $n; } // 统计栏目主题数 大数量下严谨使用非主键统计 function thread_fid_count($fid) { $n = thread_tid__count(array('fid' => $fid)); return $n; } ?>java - Inject Value in static final field from application.properties - Stack Overflow

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    How can I inject value in a static final field from application.properties file

    Injecting in just static field is possible but injecting in static final field, how it can be achieved

    @Value and System.getenv do not work.

    How can I inject value in a static final field from application.properties file

    Injecting in just static field is possible but injecting in static final field, how it can be achieved

    @Value and System.getenv do not work.

    • java
    • spring
    • spring-boot
    • dependency-injection
    Share Improve this question asked Feb 17 at 11:32 Akash BharambeAkash Bharambe 11 bronze badge 3
    • 3 You don't. static field inject doesn't work either without hacks. static final is a constant and is resolved during compile time. – M. Deinum Commented Feb 17 at 12:35
    • @M.Deinum "static final is a constant and is resolved during compile time." depends on the expression¹ being assigned (e.g. static final LocalDate today = LocalDate.now();) (not sure what you mean by "resolved") || ¹ see JLS 15.29. Constant Expressions – user85421 Commented Feb 17 at 14:59
    • If the expression is a String or a primitive it will be resolved at compile time, so if you have something like this static final String FOO = SomeOtherClass.FOO_VALUE it will copy the value of SomeOtherClass.FOO_VALUE into your class. It will not change it during loadtime or runtime. And as the question was about @Value / System.getenv which mainly concerns String values that would apply. Although the System.getenv would probably stick around. – M. Deinum Commented Feb 17 at 15:11
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    1 Answer 1

    Reset to default 1

    There is no simple reliable way to achieve that.

    I suggest you to redesign your code.

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