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 - Velocity template variable name with a special character - a dot - Stack Overflow

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    I need to access a value of a Velocity template's variable named:

    $myFeature.enabled

    Mind the dot within the name. It is defined in the code as:

    myFeature.enabled=true

    The problem is that, when I want to get the value of that variable withing html context with the following expression:

    '${myFeature.enabled}'

    it is not resolved and just gives: 

    "${myFeature.enabled}"

    I tried to escape the dot with \ or change apostrophes to " but without luck.

    Changing the name of the variable to a one without a dot is not an easy option for various reasons, so please suggest any other solutions.

    I need to access a value of a Velocity template's variable named:

    $myFeature.enabled

    Mind the dot within the name. It is defined in the code as:

    myFeature.enabled=true

    The problem is that, when I want to get the value of that variable withing html context with the following expression:

    '${myFeature.enabled}'

    it is not resolved and just gives: 

    "${myFeature.enabled}"

    I tried to escape the dot with \ or change apostrophes to " but without luck.

    Changing the name of the variable to a one without a dot is not an easy option for various reasons, so please suggest any other solutions.

    • java
    • javascript
    • velocity
    Share Improve this question asked May 27, 2014 at 12:53 BlaiseBlaise 7,5187 gold badges46 silver badges54 bronze badges
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    3 Answers 3

    Reset to default 10

    The answer is as simple as:

    Velocity variable naming: does not allow dots within variable

    Also here:

    To use a $SINGLE.VARIABLE.IDENTIFIER.WITH.DOTS no backslash is required. The engine will not treat such expression as a variable to be processed because a Velocity variable cannot contain dots according to the Velocity variable notation.

    Links:

    • http://velocity.apache/engine/devel/vtl-reference-guide.html
    • http://www.jetbrains./idea/webhelp10.5/escaping-characters-in-velocity-variables-and-directives.html

    According to the Velocity variable notation, a variable cannot contain dots.

    What you can do to work-around the issue, is to add the velocity context itself to the context:

    VelocityContext context = new VelocityContext();
context.put("globals", context); // <-- TADA
context.put("myFeature.enabled", Boolean.TRUE);
// ...

    then from the template, do:

    #if ($globals.get('myFeature.enabled'))
...
#end

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